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Kenwood - TH-K4 Service manual

1. 220 C156 470p D21 1SV305 C142 470p D19 1SV305 C144 18p G R101 47 C161 3p B R104 150 R109 100k R98 100k 3SK318 Q17 R95 180k C148 6p B C165 3p B R96 100k R99 1 0M C134 470p C153 470p C147 470p C159 3p B R100 1 0M R92 3 3k C160 13p G C163 470p C157 18p G R93 47 R94 330 C137 7p C136 5p C139 470p C135 5p L24 27n L28 12n L29 15n L27 680n R353 0 B 5T VGG VDD ANT RF SW RF SW RF AMP 5R DRIVE AMP Q10 OPERATION SW 5T VOLTAGE DROP DRIVE AMP 5T OVER INPUT PROTECTION ANTENNA SW D12 13 ANTENNA SW ANTENNA SW 5T POWER AMP Q12 GATE VOLTAGE SW APC B KAPC APC KILL 1st MIXER RX 1st AMP 5R TEMP COMPENSATION KAPC 5R X57 675X XX APC DIFFERENTIAL AMP APC OUTPUT SW VGG APC CIRCUIT OPERATION SWITCH 5T 5T BPF APC TH K4AT TH K4E FINAL TEMP B IN B IN BOUT V D14 REVERSE CURRENT PREVENTION APC OUTPUT VOLTAGE LIMITTER D15 1st IF 38 85MHz D18 19 RX BPF TUNING RX BPF TUNING D20 21 0 21 2 71 E M2 NO D44 B30 2205 05 NO B30 2205 05 D47 MA2S111 NO D60 MA2S111 D62 NO D63 MA2S111 NO R230 220 NO C374 NO 100p C512 100p NO Reference voltage value
2. 3 CONT 4 VIN 6 VOUT R337 470 D60 C312 0 039u D70 MA2S111 R243 330k D63 C304 470p R237 100k C347 470p Q57 RN2105 D69 MA2S111 C314 470p R248 3 9k Q41 RN2105 C348 470p D62 D47 2SK1830 Q50 D49 B30 2237 05 C306 47p D44 C371 470p C372 470p C370 470p D61 MA2S111 C374 R241 330k R240 100k C299 1u C298 470p KIN3 GND BL KYO1 KYO2 KIN4 PTT RESET INT0 KEY LED SW SET LCD LED SW 5T SW 5C SW 5MS SW EEPROM 5 0V AVR TX RX UNIT X57 675X XX C 3 MARKET CODE DETECTION D62 65 D69 72 PTT BOARD REVERSE CURRENT PREVENTION BIT0 KEY ILLUMINATION LED D42 44 46 47 BIT3 BIT1 BIT2 TYPE KEY LAMP PTT JUMPER MONI MENU 4 CALL 0 TX RX UNIT X57 675X XX B 3 8M VFO KIN4 5 MIG F CALL LAMP 10KEY BOARD GND KYO0 1 F KIN2 KYO1 6 KIN0 KYO2 2 VFO POWER SW KIN1 IM KYO3 5R 5MV SW 3 3V VOLTAGE DETECTION 3 MR 4 4V VOLTAGE DETECTION 5 0V AVR V U 5R 5MV 5T B 5MS LAMP BPF APC R239 QT DQT 5MV B SQV SMV DATA KAPC PLLLD AFM PLLEN SHIFT NAR 5T 5MS TO MOD 5R 5C VOLIN CLOCK TEMP FINAL 5M SI SCK HOLD VCC CS SO WP GND 5M B 5C 5R 5T AVR IM MIG 8V
3. 470n R91 1k R352 0 R111 1 0M C146 4p B C140 4p B C133 0 01u D18 1SV305 L35 150n C129 11p R108 120k C130 470p R110 1 0M C152 470p XF1 L71 0619 05 C126 10p C141 470p C145 8p B L41 6 8n L32 27n C158 13p G L38 12n L34 27n C125 1 5p R90 330 R351 220 C156 470p D21 1SV305 C142 470p D19 1SV305 C144 18p G R101 47 C161 3p B R104 150 R109 100k R98 100k 3SK318 Q17 R95 180k C148 6p B C165 3p B R96 100k R99 1 0M C134 470p C153 470p C147 470p C159 3p B R100 1 0M R92 3 3k C160 13p G C163 470p C157 18p G R93 47 R94 330 C137 7p C136 5p C139 470p C135 5p L24 27n L28 12n L29 15n C29 22u6 3 L5 270n 2SK508NV 52K Q1 L6 270n C8 5p B C3 2p B L3 22n C2 39p G L2 270n CN15 CN17 L4 6 8n D3 HVC376B D4 HVC376B D1 HVC376B D2 HVC376B L1 270n C34 2 2u6 3 C33 0 22u35 R31 2 2k C35 0 1u35 R24 1 2k R30 1k C371 470p C372 470p C370 470p D61 MA2S111 C368 470p L68 C200 0 01u R154 4 7k R143 27k VR6 50k TH2 100k R139 4 7k R146 4 7k R142 1k R165 820k C349 0 1u R158 330
4. C30 C33 C34 C35 C37 C38 C40 C41 C42 C43 C44 R231 C45 C46 C200 C50 C51 C52 C203 R172 C204 C54 C55 C56 C57 C211 C212 C213 Q12 R252 C66 Q13 Q14 1 3 4 6 R255 Q15 C70 Q20 D G G S S D Q21 Q22 Q23 Q24 C78 G D S S Q27 D S G R272 C86 Q34 Q35 Q36 C1 Q51 D7 C271 C272 F1 F3 XF1 TH1 TH2 TH3 J2 DC IN D14 D15 D16 R115 R116 R117 R118 R119 R120 R122 R123 R124 R125 R126 R127 R128 D31 R323 R324 R131 R132 R133 R134 R135 R137 R139 R330 R332 R140 C105 R141 C106 R142 C107 R143 C108 R144 C109 R145 R146 R147 R148 C110 C111 IC1 C112 IC2 1 4 5 8 C113 IC3 C114 C115 R151 C116 R152 C117 R153 C118 R154 R157 R158 D60 R159 D61 D62 D63 D64 R351 D65 C318 1 5 2 6 GND KYO1 KIN4 BL KYO2 PTT C125 C126 R18 C128 C511 R19 R165 C512 R166 R167 R168 D70 D71 D69 D72 R20 R21 L45 L46 R24 R1 C328 R171 Q4 Q6 D81 C331 L53 R30 R31 R32 R33 L58 R34 R35 C339 R36 R37 R38 R188 R189 L64 L67 C349 VR1 VR5 MAX DEV VR6 C351 C356 C166 C167
5. IM MIG 5M PTTI 5C SW 5R SW 5T SW VOX EEPCS EEPDI BPF APC INT0 PWR SW RESET KIN4 KOUT2 KIN0 KOUT1 TYPE KIN1 VUKEY KOUT0 KOUT3 KIN3 KIN2 4 95V ON 4 91V TH K4AT K4E SCHEMATIC DIAGRAM R252 100k Q51 RN4902 C308 470p R238 1k C346 470p IC10 S 80844CNNBB85 1 OUT 2 VDD 4 VSS 3 NC C310 1u C302 470p CN7 1 2 3 4 5 6 Q53 RN2701 C311 0 1u D43 B30 2205 05 D46 B30 2205 05 MIC1 C305 470p C313 0 039u CN6 1 2 3 4 5 6 R263 10k C344 470p C309 1u C345 470p D72 MA2S111 R242 330k R236 1k IC11 S 80930CNNBG80 1 VSS 2 VDD 4 OUT 3 CD CN8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C307 0 1u L63 S7 S70 0485 05 C317 470p C300 470p D42 B30 2205 05 IC9 TK11250CM 1 2 3 4 VOUT 5 GND2 6 VIN IC15 AT25160N10SI27 1 2 3 4 5 6 7 8 CN9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 D64 MA2S111 D48 B30 2237 05 C243 470p C355 0 01u C316 0 1u R230 C303 150u6 3 D71 MA2S111 C319 10u10 R246 3 9k C330 470p CPH3317 Q55 C354 470p R336 220 C318 470p R328 470k R231 150 D65 MA2S111 R255 0 IC12 TK11250CUCB 1 NP 2 GND
6. LV 47 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Foil side view J72 0884 19 A 3 PC BOARD TH K4AT K4E J K L M N O P Q R S I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C20 C21 C22 R210 C24 R211 C25 R212 C26 R213 C27 R214 R215 C29 1 1 3 4 6 13 KYO2 KYO1 KYO0 LAMP KIN4 KYO3 KIN1 KIN3 KIN0 KIN2 GND MIG 8M IM 14 2 R216 R217 R218 C30 C33 C34 C35 R223 C37 C38 R226 R227 C40 C41 C42 C43 C44 R231 C45 C46 R234 R236 R237 R238 C200 C50 C51 C52 C203 R172 C204 C54 C55 C56 R242 C57 R243 R246 R248 C211 C212 C213 Q12 R252 C66 Q13 Q14 1 3 4 6 R255 Q15 C70 Q20 D G G S S D Q21 Q22 Q23 R263 Q24 C78 G D S S Q27 D S G Q31 R272 C86 Q34 Q35 Q36 R276 Q37 B E C Q38 Q41 C246 C247 C248 C1 C249 Q47 1 3 4 5 C250 C252 C253 Q51 C255 C256 C257 Q53 C258 Q55 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG1
7. R155 100k C367 470p R206 15 D80 DA221 D40 B30 2156 05 R183 33k R273 1k R174 560k R200 10k C207 0 022u 2SK1830 Q35 C352 470p R151 1 2k C202 270p C257 1000p R191 47k D25 MA2S111 R212 10k R215 470k C255 10u10 D30 RB521S 30 R182 1k R179 220k D79 DA221 R272 4 7k R161 1 8k C228 0 1u R201 4 7k R204 180k R218 0 C226 0 1u R164 47k F3 0 5A C286 1u J4 SP D26 1SS388 R198 10k C256 1000p C223 470p R153 1k D36 RB521S 30 C242 0 01u D27 RB706F 40 R216 10k R207 1k C239 470p C208 82p R177 10k C366 470p 2SJ347 Q36 C205 0 047u C224 0 1u R173 15k R147 10k C249 470p D35 RB521S 30 R210 12 R152 2 2k J2 R355 0 R332 15 R197 100 D24 MA742 C281 470p C365 470p IC6 TA7368F 1 2 3 4 5 6 NF 7 PHASE 8 PRE GND 9 PW GND 10 POUT L50 R203 470k IC5 NJM2107F 1 2 3 4 5 V 2SK1830 Q31 C241 470p J3 MIC Q47 RN1701 D32 RB051L 40 C229 0 1u CN1 1 2 3 4 5 6 C220 4700p C276 470p C197 0 027u R181 470 R144 0 R163 470k C284 470p C247 0 1u CN2 1 2 D22 1SS361 C248 0 1u R226 220 R156 100k C231 4
8. RESET 5R SW 5T SW PWR SW INT0 VUKEY KIN3 KOUT0 TYPE KIN2 KOUT3 KOUT1 KIN1 KIN0 KIN4 KOUT2 VOX BPF APC EEPDI EEPCS 5C SW PTTI 5M BATT 5MS SW LAMP 5C 5MS DATA CLOCK D61 UHF TYPE DETECTION KEY TYPE DETECTION D60 D48 49 LCD ILLUMINATION LED 5T NAR VOLIN B SHIFT PLLLD 5C PLLEN AFM KAPC DATA QT DQT 5MS 5R TO MOD CLOCK SMV SQV FINAL TEMP 8 9 MR 7 1k C297 0 1u R244 0 CONT GND1 NP ON 4 92V 4 80V 4 79V 4 98V 4 83V 4 95V ON 6 98V T 0V R 4 90V 5 03V T 4 95V R 0V T 4 99V R 0V K L M N O X57 675 3 5 TX RX UNIT X57 675X XX A 3 TH K4AT K4E SCHEMATIC DIAGRAM R126 27k C26 470p CP2 3 9k C17 470p D5 HSC277 L58 820n C54 470p C24 470p C52 10p C167 0 1u 2SC4617 R Q4 C191 0 01u C187 2p R127 47 L64 4 7u R115 5 6k 2SC5488 Q6 C19 8p 2SC5488 Q2 D16 MA2S111 C170 0 068u R117 2 7k D Q22 RN2105 C180 120p C186 24p C1 0 01u C11 470p R20 1k C168 0 1u C46 100p CP1 2 7k R15 5 6k R5 100k R124 3 3k C41 4 7u6 3 C27 10u10 L46 560n CF1 L72 0968 05 L9 22n C4 470p R9 150 R135 470k C45 100p R116 120k R346 100 R37 27k R18 33 R7 47k
9. Radiation plate TX RX PC board b c v m n This illustration is M2 type TH K4AT K4E 4 Special care and attention required for assembly 1 Gluing to the key top MIC element section You must also glue on the speaker storage area and heap the glue up until wealthy glued on the speaker storage area and the key top for waterproofing the MIC element side of the key top Fig 1 Fig 1 2 Bending the LCD hardware fixture J21 8456 03 tabs 1 Insert the tabs of the LCD hardware fixture into four holes in the LCD installing position of the TX RX PCB TX RX unit A 3 Fig 2 Heap the glue up until wealthy glued on the speaker storage area and the key top MIC element section Fig 2 2 By pressing the LCD hardware fixture from the component side of the TX RX PCB you must bent all 4 tabs of the LCD hardware fixture being visible from the foil side until the bases of each tabs are folded at least 45 degrees Fig 3 If the bending angle of the tabs of the LCD hardware fixture is less than 45 degrees a display error may occur Bending position NG NG Min 45 degrees 3 PTT PCB TX RX unit C 3 installation procedure Installing the PTT PCB on the TX RX PCB and chassis are as follows 1 Insert the PTT PCB connector CN7 into the TX RX PCB connector CN6 lightly 2 Push three parts of the PTT PCB to contact tightly with the chassis There may be a small gap between the connectors Fig 4 Note
10. 3 4 5 6 7 8 9 10 11 12 13 14 R217 R223 R226 R227 R234 R236 R237 R238 C203 R172 204 R242 R243 R246 R248 212 Q12 R252 R263 D S S Q31 C86 R276 Q37 B E C Q38 Q41 C246 C247 C248 C249 Q47 1 3 4 5 C250 C252 C253 C255 C256 C257 Q53 C258 Q55 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 36 COM0 1 COM1 COM2 Q56 G G G S S S D D D Q57 C279 C280 C290 C291 TH1 J3 MIC J4 SP D25 D26 D34 CP34 CP35 R328 D40 D41 R335 C300 C302 C304 C305 C306 C307 C308 C309 IC6 1 5 6 10 C118 IC9 1 3 4 6 R157 C310 R158 C311 R159 C312 C313 C317 C318 1 5 2 6 GND KYO1 KIN4 BL KYO2 PTT R355 C319 65 C512 R170 R171 L49 C331 R244 L63 C344 C345 C346 C347 C348 C351 C354 C355 C359 C360 C368 R86 CN2 INT SP CN6 R202 R203 R204 IC10 1 1 2 3 4 4 1 3 4 5 5 8 R205 IC11 1 2 3 4 R206 R207 R208
11. 56 57 58 59 60 61 COM2 62 COM3 63 VSS 64 SEG16 65 SEG17 66 SEG18 67 SEG19 68 SEG20 69 SEG21 70 SEG22 71 SEG23 72 SEG24 73 NC 74 NC 75 SEG25 76 SEG26 77 SEG27 78 SEG28 79 SEG29 80 SEG30 81 SEG31 82 V0 83 V1 84 V2 85 V3 86 HST VCC 87 MD2 88 MD1 89 MD0 90 RESET 91 VSS 92 X0 93 X1 94 VCC 95 PWRSW 96 INTUP 97 INTDW 98 DCDET 99 RXLED 100 BSFT 101 PLLEN 102 PLLLD 103 KIN0 104 KIN1 105 KIN2 106 KIN3 107 KIN4 108 TYPE 109 VUKEY 110 MICM 111 NOAA 112 5R 113 SHIFT 114 5T 115 KOUT0 116 KOUT1 117 KOUT2 118 KOUT3 119 VSS 120 BTDET SEG2 SEG1 R310 3 9k R286 0 SEG24 C294 5p SEG19 SEG6 SEG19 R326 0 SEG16 SEG11 SEG18 SEG30 SEG22 C360 0 1u Q52 RN1107 CP35 1k SEG12 SEG0 SEG8 R254 1k R283 0 SEG15 SEG22 SEG11 SEG0 R325 47k SEG21 SEG7 SEG29 C335 0 1u R253 1k SEG20 SEG27 SEG25 COM0 SEG3 SEG9 C359 0 1u SEG13 SEG28 SEG24 SEG12 SEG30 SEG2 X3 7 982MHz R282 0 COM0 SEG14 SEG23 SEG13 C293 47p SEG14 SEG29 C332 0 1u SEG8 R276 47k SEG28 R277 47k COM2 COM1 SEG27 SEG9 SEG10 LCD B38 0881 05 1 COM0 2 COM1 3 COM2 4 COM3 5 SEG0 6 SEG1 7 SEG2 8 SEG3 9 SEG4 10 SEG5 11 SEG6 12 SEG7 13 SEG8 14 SEG9 15 SEG10 16 SEG1
12. C29 22u6 3 L5 270n 2SK508NV 52K Q1 L6 270n C8 5p B C3 2p B L3 22n C2 39p G L2 270n CN15 CN17 L4 6 8n D3 HVC376B D4 HVC376B D1 HVC376B D2 HVC376B L1 270n C34 2 2u6 3 C33 0 22u35 R31 2 2k C35 0 1u35 R24 1 2k R30 1k C9 5p B C177 10u10 C178 0 01u C179 0 1u D6 1SV278 IF AMP SQ FILTER D1 4 RF AMP 5R VCO FREQUENCY CONTROL SMV RF AMP FREQUENCY SHIFT SQV RIPPLE FILTER VCO SHIFT CONTROL SW RF AMP AF MUTE SW VCO SHIFT VOLIN B 5T 2nd L O PLLEN DATA CLOCK PLLLD 450kHz AF FILTER FM IC PLL IC FREQ SPEED UP TRIPLER D6 VCO MODULATION 5R 5R 5R KAPC BPF APC BPF APC BPF APC PLLLD PLLEN SHIFT B 5C NAR VOLIN 5T QT DQT 5MS 5R TO MOD CLOCK DATA KAPC AFM SQV SMV TEMP FINAL DATA 5R CLOCK TO PLLLD 5C SHIFT AFM 5MS PLLEN MOD NAR QT DQT SMV SQV VOLIN VOLIN PLLLD CLOCK 5R PLLEN AFM 5C SQV SMV QT DQT NAR DATA BPF APC SQV SMV NAR AFM 5R BPF APC OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN FLO CPO GND1 GND2 FIN FIN VCC1 OSCI D16 PLL LOCK DETECTION KAPC TEMP FINAL FINAL TEMP 9 10 11 12 13 14 15 16 WIDE NARROW CHANGEO
13. D6 D8 D9 C270 C276 C281 C282 C283 C284 C285 C286 C293 C294 C295 C298 C299 TH4 CN10 R100 R101 R103 R104 CN15 CN17 R107 D10 R108 D11 R109 D12 D13 R110 D18 R111 D19 D20 D21 D22 D24 R310 R312 R313 D27 L1 L2 L3 L4 R318 L5 L6 D30 L8 L9 D32 D33 D35 CP31 D36 CP32 CP33 R130 R325 R326 L10 L11 CD1 L13 C100 L14 C101 L15 C102 L16 L17 L18 L19 L20 L21 L22 C303 L23 L24 L25 R342 L26 R343 L27 R344 1 2 3 4 IC4 L28 L29 IC5 1 3 4 5 R346 R347 R348 IC8 R155 R156 L30 CF1 L32 C314 R10 L34 R11 L35 R352 C316 R12 L36 R353 R354 C124 R14 L38 R160 R15 R161 R16 R162 R17 R163 C510 R164 C129 L40 L41 C323 D73 D74 C130 C324 C131 C132 C326 C133 C327 C134 D79 Q1 G S D C135 C329 Q2 C136 Q3 D S G C137 R173 R174 C139 Q5 R175 R176 R177 D80 C330 L50 R178 Q9 R179 C332 L54 C140 C141 C335 L56 C336 C142 C144 R180 C338 C145 R181 R182 C146 C147 R183 R4 C148 R39 R5 R185 R6 R7 R8 R9 L65 R41 R42 C152 C153 L68 R190 R45 R191 R46 R192
14. F15 1008 04 SHADOW PLATE LCD G10 1317 04 FIBROUS SHEET SP NET G11 4296 04 SHEET 21 3B 3D G53 1529 04 PACKING VOL ENC 22 2A 2C G53 1572 12 PACKING CASE 23 2B 2D G53 1589 03 PACKING SP MIC 24 3E H52 1964 02 ITEM CARTON CASE TH K4E E 25 2H H52 1965 12 ITEM CARTON CASE TH K4AT M2 26 2F H12 3146 01 PACKING FIXTURE E 27 3G H12 3147 03 PACKING FIXTURE M2 28 2A 2C J19 5451 03 HOLDER TERMINAL 29 1B 1D J21 8456 03 HARDWARE FIXTURE LCD 30 2E 3G J29 0709 04 BELTHOOK ASSY ACCESSORY 31 2A 2C J30 1284 04 SPACER PTT KNOB 32 3E 2G J69 0342 05 HANDSTRAP ACCESSORY 33 2B 2D J82 0076 05 FPC VOL ENC 44 3A 3C J99 0376 04 ADHESIVE TAPE 34 1B 1D K29 5150 03 KNOB VOL 35 1B 1D K29 5159 03 KNOB ENC 36 1A K29 9272 02 KEY TOP 16KEY M2 37 1A 1C K29 9274 03 KNOB PTT LAMP MONI 38 1C K29 9276 02 KEY TOP 4KEY E A 2B 2D N09 1492 05 PAN HEAD SCREW SMA B 1B 1D N14 0569 04 CIRCULAR NUT VOL ENC C 1B 1D N14 0573 04 CIRCULAR NUT SMA D 1A 1C N79 2035 46 PAN HEAD TAPTITE SCREW PCB E 2A 2C N79 2040 45 PAN HEAD TAPTITE SCREW HOLDER R PANEL TX RX UNIT X54 675X XX 0 21 M2 2 71 E TH K4AT K4E PARTS LIST 18 TX RX UNIT X57 675X XX Destination Ref No Parts No Description Address New parts Destination Ref No Parts No Description Address New parts E TH K4E M2 TH K4AT
15. R10 RK73HB1J470J CHIP R 47 J 1 16W R11 RK73HB1J154J CHIP R 150K J 1 16W R12 RK73HB1J470J CHIP R 47 J 1 16W R14 RK73HB1J332J CHIP R 3 3K J 1 16W R15 RK73HB1J562J CHIP R 5 6K J 1 16W R16 RK73HB1J271J CHIP R 270 J 1 16W R17 RK73HB1J332J CHIP R 3 3K J 1 16W R18 RK73HB1J330J CHIP R 33 J 1 16W R19 RK73HB1J124J CHIP R 120K J 1 16W R20 RK73HB1J102J CHIP R 1 0K J 1 16W R21 RK73HB1J472J CHIP R 4 7K J 1 16W R24 RK73HB1J122J CHIP R 1 2K J 1 16W R30 RK73HB1J102J CHIP R 1 0K J 1 16W R31 RK73HB1J222J CHIP R 2 2K J 1 16W R32 RK73HB1J102J CHIP R 1 0K J 1 16W R33 RK73HB1J220J CHIP R 22 J 1 16W R34 RK73HB1J332J CHIP R 3 3K J 1 16W R35 RK73HB1J124J CHIP R 120K J 1 16W R36 RK73HB1J100J CHIP R 10 J 1 16W R37 38 RK73HB1J273J CHIP R 27K J 1 16W R39 RK73HB1J271J CHIP R 270 J 1 16W R41 RK73HB1J271J CHIP R 270 J 1 16W R42 R92 1368 05 CHIP R 0 OHM R45 RK73HB1J332J CHIP R 3 3K J 1 16W R46 RK73HB1J103J CHIP R 10K J 1 16W R47 RK73HB1J562J CHIP R 5 6K J 1 16W R49 RK73HB1J102J CHIP R 1 0K J 1 16W R50 RK73HB1J330J CHIP R 33 J 1 16W R51 RK73HB1J471J CHIP R 470 J 1 16W R52 53 RK73HB1J102J CHIP R 1 0K J 1 16W R54 RK73HB1J470J CHIP R 47 J 1 16W R55 RK73HB1J472J CHIP R 4 7K J 1 16W R56 RK73HB1J103J CHIP R 10K J 1 16W R58 RK73HB1J470J CHIP R 47 J 1 16W R59 RK73HB1J123J CHIP R 12K J 1 16W R60 RK73HB1J563J CHIP R 56K J 1 16W
16. R58 C168 C169 C170 C171 C172 C173 C174 C175 C176 C370 C371 C372 R70 C180 R71 R72 C182 C183 R74 R75 R76 C186 R77 C187 R78 C188 R79 C189 R80 C190 R81 C191 R82 C192 C193 R83 R84 C194 R85 C195 R86 C196 C197 C198 R90 CN6 X1 CN9 CP1 CP2 IC17 LV B BTEMP GND 1 8 9 16 1 8 9 16 DCS BAL FREQ D S G D S G D S G 1 4 5 8 SET 44 TH K4AT K4E PC BOARD TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Component side view J72 0884 19 A 3 Ref No Address IC1 4D IC2 8F IC3 9B IC6 6M IC9 9P IC10 6P IC11 6Q IC15 7P Ref No Address IC17 9I Q4 4C Q6 3E Q12 5J Q13 7F Q14 9E Q15 5E Q20 10E Ref No Address Q21 10D Q22 10D Q23 6B Q24 8D Q27 6H Q31 6L Q34 9F Q35 10F Ref No Address Q36 10E Q37 8L Q38 7K Q41 9Q Q47 7S Q51 4H Q53 9Q Q55 5P Ref No Address Q56 7L Q57 8Q D7 4B D14 8E D15 9D D16 4D D25 6K D26 7L Ref No Address D31 9F D34 7L D40 7S D41 7S D60 3H D61 3H D62 3H D63 3H Ref No Address D64 4H D65 4H D69 3G D70 3H D71 3H D72 3G D81 10G J K L M N O P Q R S 1 2
17. 47K J 1 16W TH K4AT K4E PARTS LIST 21 TX RX UNIT X57 675X XX Destination Ref No Parts No Description Address New parts Destination Ref No Parts No Description Address New parts E TH K4E M2 TH K4AT R165 166 RK73HB1J824J CHIP R 820K J 1 16W R167 168 RK73HB1J184J CHIP R 180K J 1 16W R170 RK73HH1J563D RESISTOR 56K D 1 16W R171 RK73HH1J393D RESISTOR 39K D 1 16W R172 RK73HB1J103J CHIP R 10K J 1 16W R173 RK73HB1J153J CHIP R 15K J 1 16W R174 RK73HB1J564J CHIP R 560K J 1 16W R175 RK73HB1J222J CHIP R 2 2K J 1 16W R176 RK73HB1J824J CHIP R 820K J 1 16W R177 RK73HB1J103J CHIP R 10K J 1 16W R178 R92 1368 05 CHIP R 0 OHM R179 RK73HB1J224J CHIP R 220K J 1 16W R180 RK73HB1J393J CHIP R 39K J 1 16W R181 RK73HB1J471J CHIP R 470 J 1 16W R182 RK73HB1J102J CHIP R 1 0K J 1 16W R183 RK73HB1J333J CHIP R 33K J 1 16W R185 RK73HB1J274J CHIP R 270K J 1 16W R186 RK73HB1J683J CHIP R 68K J 1 16W R188 RK73HB1J470J CHIP R 47 J 1 16W R189 R92 1368 05 CHIP R 0 OHM R190 191 RK73HB1J473J CHIP R 47K J 1 16W R192 RK73HB1J471J CHIP R 470 J 1 16W R193 RK73HB1J182J CHIP R 1 8K J 1 16W R194 RK73HB1J103J CHIP R 10K J 1 16W R195 RK73HB1J101J CHIP R 100 J 1 16W R196 RK73HB1J103J CHIP R 10K J 1 16W R197 RK73HB1J101J CHIP R 100 J 1 16W R198 RK73HB1J103J CHIP R 10K J 1 16W R199 RK73HB1J102J CHIP R 1 0K J 1 16W R200 RK
18. 5E Q20 10E Ref No Address Q21 10D Q22 10D Q23 6B Q24 8D Q27 6H Q31 6L Q34 9F Q35 10F Ref No Address Q36 10E Q37 8L Q38 7K Q41 9Q Q47 7S Q51 4H Q53 9Q Q55 5P Ref No Address Q56 7L Q57 8Q D7 4B D14 8E D15 9D D16 4D D25 6K D26 7L Ref No Address D31 9F D34 7L D40 7S D41 7S D60 3H D61 3H D62 3H D63 3H Ref No Address D64 4H D65 4H D69 3G D70 3H D71 3H D72 3G D81 10G J K L M N O P Q R S I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R235 R239 C297 C201 C202 R240 C205 R241 C206 C207 C208 C209 C210 C61 Q10 1 2 3 4 C64 Q11 G S D C65 R253 C67 R254 C68 C219 Q16 1 2 3 4 R256 Q17 1 2 3 4 C220 C221 C71 C222 C72 C223 C73 C224 C225 C75 C226 C76 C77 C227 C228 C229 Q29 C230 C231 C82 C83 Q30 C84 C235 1 6 ENCA GND ENCB VOL IN VOL OUT GND R271 C236 Q33 E B C C237 R273 C238 C88 C239 C89 R275 R277 C240 C90 C241 C91 C242 C93 C94 C95 C96 R282 C97 R283 C98 C99 R285 C2 R286 C3 C4 C5 R289 C6 C7 C8 C9 Q52 D1 D2 D3 D4 Q58 D S G D5
19. 7 8 GND3 CE CLK DATA LE FO LD VCC2 VP C43 0 01u C332 0 1u C50 22p IC3 TA31136FN 1 2 3 4 5 6 7 8 9 AFOUT 10 QUAD 11 IFOUT 12 RSSI 13 N DET 14 N REC 15 GND 16 MIXIN R160 4 7k C282 470p R8 100k D63 C280 470p R10 47 C189 470p C171 470p C201 1200p SEG8 C222 0 01u R134 390k R276 47k C238 470p R4 1k R208 10 SEG28 R180 39k C236 0 01u R277 47k R131 330k COM2 C57 10p 2SK1830 Q20 R213 22k C235 0 01u R16 270 C304 470p L67 C250 1u R237 100k C30 470p R21 4 7k D34 MAZS0270H R35 120k COM1 SEG27 C252 100p C347 470p R14 3 3k C15 12p C511 470p R189 0 C206 0 018u C230 1u SEG9 SEG10 R19 120k C353 470p C38 0 01u R199 1k Q57 RN2105 VR5 50k C188 24p D69 MA2S111 C5 0 1u R123 1 8k LCD B38 0881 05 1 COM0 2 COM1 3 COM2 4 COM3 5 SEG0 6 SEG1 7 SEG2 8 SEG3 9 SEG4 10 SEG5 11 SEG6 12 SEG7 13 SEG8 14 SEG9 15 SEG10 16 SEG11 17 SEG12 18 SEG13 19 SEG14 20 SEG15 21 SEG16 22 SEG17 23 SEG18 24 SEG19 25 SEG20 26 SEG21 27 SEG22 28 SEG23 29 SEG24 30 SEG25 31 SEG26 32 SEG27 33 SEG28 34 SEG29 35 SEG30 36 SEG31 KTC4082 Q23 SEG7 R176 820k CD1 450kHz R211 470k R
20. CN2 E40 5929 05 PIN ASSY CN6 E40 6327 05 PIN ASSY CN7 E40 5630 05 PIN ASSY SOCKET CN8 E40 6308 05 PIN ASSY CN9 E40 6309 05 PIN ASSY SOCKET CN15 E23 1081 05 TERMINAL CN17 E23 1081 05 TERMINAL J2 E03 0190 05 DC JACK J3 E11 0484 05 3 5D PHONE JACK 3 5D J4 E11 0483 05 2 5D PHONE JACK 2 5D CN10 F01 1032 05 RADIATION PLATE F1 F53 0286 05 FUSE 2 5A 32V F3 F53 0287 05 FUSE 0 5A 32V CD1 L79 1474 05 TUNING COIL CF1 L72 0968 05 CERAMIC FILTER L1 2 L40 2785 92 SMALL FIXED INDUCTOR 270NH L3 L41 2278 14 SMALL FIXED INDUCTOR L4 L41 6868 14 SMALL FIXED INDUCTOR L5 6 L40 2785 92 SMALL FIXED INDUCTOR 270NH L8 L40 1875 71 SMALL FIXED INDUCTOR 18NH L9 L40 2275 71 SMALL FIXED INDUCTOR 22NH L10 L40 1875 71 SMALL FIXED INDUCTOR 18NH L11 L40 1575 71 SMALL FIXED INDUCTOR 15NH L13 L92 0149 05 FERRITE CHIP L14 15 L41 4763 14 SMALL FIXED INDUCTOR L16 L34 4577 05 AIR CORE COIL L17 L34 4602 05 AIR CORE COIL L18 L41 2285 14 SMALL FIXED INDUCTOR L19 22 L34 4564 05 AIR CORE COIL L23 L40 1092 81 SMALL FIXED INDUCTOR L24 L40 2775 71 SMALL FIXED INDUCTOR 27NH L25 L92 0149 05 FERRITE CHIP L26 L41 4785 14 SMALL FIXED INDUCTOR L27 L41 6885 14 SMALL FIXED INDUCTOR L28 L40 1275 71 SMALL FIXED INDUCTOR 12NH L29 L40 1575 71 SMALL FIXED INDUCTOR 15NH L30 L34 4564 05 AIR CORE COIL L32 L41 2778 14 SMALL FIXED INDUCTOR L34 L41 2778 14 S
21. FET at the same time c heat them sufficiently and remove the final FET v Two persons should be required to do this 5 Remove all PC boards from the chassis 6 Confirm that there is no space between the radiation plate installed on the foil side of the TX RX PC board TX RX unit A 3 and the PC board b If there is any space between the radiation plate and PC board eliminate it by applying the tip of the soldering iron to the radiation plate 7 Apply the tip of the soldering iron to the installation side of the radiation plate of the TX RX PC board put a little amount of solder to the radiation plate that is seen through a square hole in the final FET installation section and melt the solder n 8 When the solder in step 7 is melted place the final FET on the PC board by aligning it with the silk of the final FET installation section of the PC board m 9 Release the soldering iron and confirm that the final FET and radiation plate have been soldered 10 Solder the four pins of the final FET with the soldering iron 11 Install all the PC boards 12 Reinstall the shield cover removed in step 3 above in its original position and install two screws 13 Solder the shield cover to the PC board 14 Install the chassis on the case assembly and assemble them 15 Readjust transmission power Note Since the FET is sensitive to static electricity always wear a grounding band Use a highly insulated ceramic heater solder iron
22. IC17 NJM2904V 1 2 3 4 GND 5 6 7 8 V C339 0 047u C204 0 033u R324 47k C331 470p C211 2200p C203 120p R168 180k C212 0 012u R159 120k R166 820k R167 180k C351 0 01u C213 4 7u6 3 R171 39k D R170 56k D R157 330k C510 0 047u R223 100k R234 18k R354 33k NI MH TEMPERATURE DETECTION Q37 TX BUSY LED SW VOLOUT D81 Q36 Q33 OPERATION SW AVR CONSTANT VOLTAGE SP 5C 5R 5T AVR T0 B SPG DCS BAL SP MUTE SW REM DC IN CHARGE SW Q31 Q56 OPERATION SW WIDE NARROW CHANGEOVER SW TX RX UNIT X57 675X XX A 3 SPK SPG DC IN DETECTION REVERSE CURRENT PREVENTION BTEMP PTTE TXD REM RXD 5MS W N 8 OHM MICM CHARGE MIC ALC RECTIFICATION MIC MUTE CONTROL REVERSE CURRENT PREVENTION D79 80 LIMITER SP MUTE SPEED UP VOX DETECTION RECTIFICATION 11 5V AVR 5C 5R 5T AVR 5MS 8V BATTERY TERMINAL AF AMP LAMP AVR DTMF BEEP 1750 VOX DETECTION AMP REVERSE CURRENT PREVENTION 5MV MIC MUTE SW MIG VOLOUT IM CTCSS DCS FILTER MIC AMP PTT MIC MIG DTMF 1750 SPM MAX DEV TXD IM CONSTANT CURRENT CIRCUIT IM REM TXD AF AMP PTTE SPK HPF AFO RXD 5M QT DQT 5T MOD ENCB 5MS TO VOLIN NAR ENCA 5MS MOD NAR VOLIN
23. J C52 CC73HCH1H100D CHIP C 10PF D C54 CK73HB1H471K CHIP C 470PF K C55 CK73HB1C103K CHIP C 0 010UF K 1 3A 2G A02 3817 02 CABINET ASSY BATTERY CASE M2 2 1A A02 3822 23 CABINET ASSY 16KEY M2 3 1C A02 3823 23 CABINET ASSY 4KEY E 4 3A 3C A10 4066 11 CHASSIS 5 3B 3D A82 0053 02 REAR PANEL 6 1B 1D B09 0675 03 CAP SP MIC DC IN 7 1A 1C B10 2746 03 FRONT GLASS 8 1B 1D B11 1805 03 ILLUMINATION GUIDE LCD 9 2B 2D B11 1806 04 FILTER LCD 10 1B 1D B38 0881 05 LCD 11 1G B62 1695 00 INSTRUCTION MANUAL CHINESE M2 11 1E 1G B62 1696 00 INSTRUCTION MANUAL ENGLISH 11 1E B62 1697 00 INSTRUCTION MANUAL SPANISH E 11 1E B62 1699 00 INSTRUCTION MANUAL GERMAN E 11 1E B62 1702 00 INSTRUCTION MANUAL ITALIAN E 11 1E B62 1757 00 INSTRUCTION MANUAL FRENCH E 11 1E B62 1758 00 INSTRUCTION MANUAL DUTCH E 12 3A B72 2131 04 MODEL NAME PLATE TH K4AT M2 12 3C B72 2132 04 MODEL NAME PLATE TH K4E E 13 2B 2D E04 0443 05 RF COAXIAL RECEPTACLE SMA 14 2A 2C E23 1234 04 TERMINAL BATTERY 15 2B 2D E29 1199 04 INTER CONNECTOR LCD 16 1A 1C E37 1106 05 LEAD WIRE WITH CONNECTOR SP 17 2A F10 2464 04 SHIELDING COVER FINAL FET M2 18 2A 2C F10 2465 04 SHIELDING COVER ANT TERMINAL 19 2C F10 2494 04 SHIELDING COVER FINAL FET E 20 2B 2D
24. L Bias ON 17 SEG0 O LCD segment output 0 18 SEG1 O LCD segment output 1 19 SEG2 O LCD segment output 2 20 SEG3 O LCD segment output 3 21 SEG4 O LCD segment output 4 22 SEG5 O LCD segment output 5 23 SEG6 O LCD segment output 6 24 SEG7 O LCD segment output 7 25 SEG8 O LCD segment output 8 26 SEG9 O LCD segment output 9 27 SEG10 O LCD segment output 10 28 SEG11 O LCD segment output 11 29 SEG12 O LCD segment output 12 30 SEG13 O LCD segment output 13 31 SEG14 O LCD segment output 14 32 SEG15 O LCD segment output 15 33 VSS GND 34 COR1 Power supply stabilization Connected to VSS through 0 1uF 35 ENCA I Encoder A side input 36 ENCB I Encoder B side input 37 5MS O 5MS main power supply switch L ON 38 DVCC Reference voltage input for DAC 39 DVSS Ground for DAC 40 DTMF O Encode waveform output of DTMF BEEP BEEP 1750Hz D A 41 TONE O Encode waveform output of CTCSS DCS D A 42 AVCC Positive power supply for ADC 43 AVRH Reference voltage input for ADC 44 AVRL Ground reference voltage input for ADC 45 AVSS Ground for ADC 46 REM I Remote control microphone key voltage input A D 47 SIGIN I Decode waveform input of CTCSS DCS A D Pin Pin I O Function No Name Pin Pin I O Function No Name 48 SQ I Noise voltage input for squelch A D 49 SM I RSSI
25. R209 IC15 5 8 POWER J72 0884 19 A 3 LCD ANT 45 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Component side view J72 0884 19 A 3 PC BOARD TH K4AT K4E J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R235 R239 C297 R240 R241 C206 C20 R253 R254 R256 Q17 1 2 3 4 C223 C224 C226 C227 C228 C229 Q29 C230 C231 C82 C83 Q30 C84 C235 1 6 ENCA GND ENCB VOL IN VOL OUT GND C236 C237 C238 C88 C239 C89 R275 R277 C240 C90 C241 C91 C242 C93 C94 C95 C96 R282 C97 R283 C98 C99 R285 R286 R289 Q52 C281 C283 C284 C285 C286 C293 C294 C295 C298 C299 TH4 CN10 R1 R103 R104 CN15 CN17 R107 D10 R108 D11 R109 D12 D13 R110 R111 D20 D21 D22 D24 R310 R312 R313 D27 R318 CP31 D36 CP32 CP33 R325 R326 C100 C101 C102 L16 L17 L18 L19 L20 L21 L22 C303 L23 L25 R342 R343 1 2 3 4 IC4 1 5 IC8 L30 C314 R352 C316 L36 R353 R354 L38 R162 C510 L40 L41 D74 D79 R1 D80 C330 R179 C332 C335 C336 R180 R181 R182 R183 R185 C152
26. SPM TEMP DET TH1 B57331V 2103J 5R 5R APC V D14 RB521S 30 CHARGE FINAL DTMF BEEP SQ SM J2 ANT REM TXD AMP 450kHz R BATT TERMINAL 7 5V Norminal 6 0 9 0V B DC IN 13 8V Norminal 12 0 16 0V D33 PROTECT RB051L 40 RB051L 40 PROTECT D32 PROTECT RB521S 30 D81 VR BPF APC B PROTECT D30 RB521S 30 Q56 CPH3417 D26 1SS388 SP MUTE SW 2SK1830 D25 MA2S111 Q31 MUTE SW D12 D13 ANT SW HVC131 D17 HSM88AS ANT SW CN2 IC6 D48 49 D42 43 46 D47 44 5MV PROTECT PROTECT XC6202PB 52FR 5MS Q55 IC9 5MS SW 2SK1830 AVR BTDET Q9 10 13 D8 10 TH1 IC16 Q47 5C CPH3317 RB521S 30 D36 Q57 VR1 ENC Q37 Q38 5M 11 5V 5 0V 5C SW 5 0V RB521S 30 5T SW 5R D35 5R SW IC1 TCXO Q4 5 6 D40 41 IC4 AVR AF LAMP AVR IC12 Q53 RN2105 Q41 DC IN DET IC5 Q30 RN2701 AVR AF AMP TK11250 CM IC3 17 D9 14 Q16 17 Q22 23 24 TK11250 CUCB 5MV SW 5T 2SB1184 Q R 2SC4617 R RN2105 Q35 TH K4AT K4E 58 BC 21 WALL CHARGER PB 43N Ni MH BATTERY PACK BC 21 External View Rated output voltage DC 13 8V 5 Rated output current 150mA Charging time Approx 12 hours PB 43N Photo is K type BC 21 Specifications PB 43N External View PB 43N Schematic diagram T Discharge
27. 0 1u 2SC5488 Q9 C87 18p C73 470p R344 47 R52 1k C101 4p B C90 470p C76 8p C98 2p B C65 10p C326 470p D74 HSM88AS C68 10p 2SC4926YD Q10 R59 12k R34 3 3k R348 68 R85 560 R77 150k D Q14 RN4902 R78 150k D C113 470p R86 5 6k TH1 10k C118 470p C112 470p R74 100k D D14 RB521S 30 R71 0 39 R70 0 39 R83 56k C109 470p 2SK1830 Q13 C105 470p C108 100p R82 27k C106 470p C115 470p C111 470p C117 470p R76 150k D C512 R75 100k D R80 10k IC2 NJM2904V 1 AOUT 2 A IN 3 A IN 4 GND 5 6 7 8 R84 100k R81 390k C107 470p R72 0 39 C116 10u4 C114 470p R79 150k D D15 MA8039 C356 0 01u C110 470p L25 C132 0 01u C164 470p C162 470p 3SK318 Q16 C128 0 01u R107 100k L36 56n R88 330 D20 1SV305 R103 1 8k L40 4 7n R97 150k C131 0 01u L26 470n R91 1k R352 0 R111 1 0M C146 4p B C140 4p B C133 0 01u D18 1SV305 L35 150n C129 11p R108 120k C130 470p R110 1 0M C152 470p XF1 L71 0619 05 C126 10p C141 470p C145 8p B L41 6 8n L32 27n C158 13p G L38 12n L34 27n C125 1 5p R90 330 R351
28. 2157 05 LED YELLOW D42 44 B30 2205 05 LED YG M2 D42 43 B30 2205 05 LED YG E D46 B30 2205 05 LED YG E D46 47 B30 2205 05 LED YG M2 D48 49 B30 2237 05 LED YG C1 CK73HB1C103K CHIP C 0 010UF K C2 CC73HCH1H390G CHIP C 39PF G C3 CC73HCH1H020B CHIP C 2 0PF B C4 CK73HB1H471K CHIP C 470PF K C5 CK73HB1A104K CHIP C 0 10UF K C6 CK73HB1H471K CHIP C 470PF K C7 CC73HCH1H0R5B CHIP C 0 5PF B C8 9 CC73HCH1H050B CHIP C 5 0PF B C10 CK73HB1C103K CHIP C 0 010UF K C11 CK73HB1H471K CHIP C 470PF K C13 CC73HCH1H0R5B CHIP C 0 5PF B C14 CK73HB1H471K CHIP C 470PF K C15 CC73HCH1H120J CHIP C 12PF J C17 18 CK73HB1H471K CHIP C 470PF K C19 CC73HCH1H080D CHIP C 8 0PF D C20 CC73HCH1H050C CHIP C 5 0PF C C21 CK73HB1H471K CHIP C 470PF K C22 CC73HCH1H040C CHIP C 4 0PF C C24 26 CK73HB1H471K CHIP C 470PF K C27 C92 0628 05 CHIP TAN 10UF 10WV C29 C92 0712 05 CHIP TAN 22UF 6 3WV C30 CK73HB1H471K CHIP C 470PF K C33 C92 0002 05 CHIP TAN 0 22UF 35WV C34 C92 0656 05 TANTALUM C 2 2UF 6 3WV C35 C92 0001 05 CHIP C 0 1UF 35WV C37 CK73HB1H471K CHIP C 470PF K C38 CK73HB1C103K CHIP C 0 010UF K C40 CK73HB1A104K CHIP C 0 10UF K C41 C92 0507 05 CHIP TAN 4 7UF 6 3WV C42 CK73HB1H471K CHIP C 470PF K C43 CK73HB1C103K CHIP C 0 010UF K C44 46 CC73HCH1H101J CHIP C 100PF J C50 CC73HCH1H220J CHIP C 22PF J C51 CC73GCH1H220J CHIP C 22PF
29. 8 PRE GND 9 PW GND 10 POUT L50 R203 470k Q52 RN1107 IC5 NJM2107F 1 2 3 4 5 V C190 0 01u D42 B30 2205 05 C20 5p CP35 1k R36 10 IC9 TK11250CM 1 2 3 4 VOUT 5 GND2 6 VIN IC15 AT25160N10SI27 1 2 3 4 5 6 7 8 2SK1830 Q31 SEG12 CN9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C241 470p C22 4p C174 180p SEG0 J3 MIC SEG8 R6 1k D64 MA2S111 Q47 RN1701 R254 1k R283 0 C10 0 01u D32 RB051L 40 D48 B30 2237 05 SEG15 R119 1 8k SEG22 C229 0 1u CN1 1 2 3 4 5 6 SEG11 C220 4700p C175 22p C243 470p C56 470p C276 470p C197 0 027u SEG0 R325 47k SEG21 R181 470 R144 0 C124 0 1u R163 470k C355 0 01u C316 0 1u C176 0 1u C284 470p C247 0 1u R230 CN2 1 2 D22 1SS361 C42 470p R125 560 SEG7 C13 0 5p B C40 0 1u C248 0 1u R11 150k R226 220 SEG29 C335 0 1u R253 1k C303 150u6 3 SEG20 D71 MA2S111 C173 180p R156 100k C231 470p D81 RB521S 30 C219 0 047u 2SK1830 Q27 2SC4617 R Q21 X1 12 8MHz L77 1931 05 VC GND OUTPUT VCC C319 10u10 R132 2 2k R246 3 9k R122 2 7k LV 2SK1830 Q3 R195 100 2SC5
30. Alarm sound and DC IN terminal voltage 17 5V display DC ERR message Common Section Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks TH K4AT K4E 36 1 RX BPF Squelch level 0 Adjust 1 Frequency 435 050MHz SSG TX RX ANT VOL Turn the VOL knob 0 63V SSG output 53dBm 501 uV Oscilloscope A 3 SP knob to obtain 0 63V AF SSG MOD 1kHz Distortion meter output SSG DEV 3kHz AF V M Switch to Adjustment mode Dummy load and carry out the operations for adjustment item E Refer to page 29 2 LCD display BPL Encoder Write Max Sensitivity Frequency 400 050MHz MENU SSG 119dBm 0 25 uV 3 SSG 110dBm 0 707 uV Check 12dB SINAD or more 4 LCD display BPC Encoder Write Max Sensitivity Frequency 435 050MHz MENU SSG 120dBm 0 22 uV 5 SSG 120dBm 0 22 uV Check 12dB SINAD or more 6 LCD display BPH Encoder Write Max Sensitivity Frequency 469 990MHz MENU SSG 121dBm 0 199 uV 7 SSG 113dBm 0 501uV Check 12dB SINAD or more 2 IF response 1 Frequency 469 990MHz SSG Check 12dB SINAD or Check SSG Frequency 450 565MHz Oscilloscope less SSG output 53dBm 501uV Distortion meter Note If the SSG MOD 1kHz specification is not SSG DEV 3kHz satisfied repeat the AF output 0 63V 8 operations for 2 Frequency 400 050MHz 1 RX BPF SSG Frequency 380 62
31. C153 L68 R190 R191 R192 C156 R193 R194 C158 R195 C159 R196 R197 R198 R199 C160 C161 C162 C357 C163 C164 C358 C165 C361 C365 R186 R61 C366 R62 C367 C87 CN1 X3 R200 R201 IC12 1 4 6 3 1 120 30 31 60 61 90 91 J72 0884 19 A 3 46 TH K4AT K4E PC BOARD TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Foil side view J72 0884 19 A 3 Ref No Address IC4 10E IC5 10K IC8 7E IC12 6B IC16 8L Q1 4P Q2 3O Q3 3P Ref No Address Q5 3N Q9 4N Q10 5N Q11 6M Q16 4L Q17 3J Q29 10J Q30 8J Ref No Address Q33 9N Q52 7G Q58 6K D1 4R D2 3R D3 3R D4 3R D5 2Q Ref No Address D6 3Q D8 4M D9 3M D10 3G D11 4G D12 3F D13 3G D18 2L Ref No Address D19 2L D20 3I D21 3H D22 10J D24 8I D27 9J D30 8N D32 8M Ref No Address D33 8N D35 7N D36 9D D73 7N D74 3F D79 11I D80 11I J K L M N O P Q R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C201 C202 C205 C206 C207 C208 C209 C210 C61 Q10 1 2 3 4 C64 Q11 G S D C65 C67 C68 C219 Q16 1 2 3 4 Q17 1 2 3 4 C220 C221 C71 C222 C72 C223 C73 C224 C225 C7
32. C190 0 01u C20 5p R36 10 C22 4p C174 180p R6 1k C10 0 01u R119 1 8k C175 22p C56 470p C124 0 1u C176 0 1u C42 470p R125 560 C13 0 5p B C40 0 1u R11 150k C173 180p 2SC4617 R Q21 X1 12 8MHz L77 1931 05 VC GND OUTPUT VCC R132 2 2k R122 2 7k LV 2SK1830 Q3 2SC5488 Q5 2SC5488 Q24 R128 3 3k R38 27k R130 100 C37 470p C182 0 1u R188 47 R118 27k L53 12n R17 3 3k C51 22p C172 1800p C183 0 1u C169 0 068u R32 1k R120 2 7k R133 1k C21 470p C6 470p D7 MA2S111 C7 0 5p B R12 47 C166 0 01u IC1 LMX2316TMX 1 2 3 4 5 6 7 8 GND3 CE CLK DATA LE FO LD VCC2 VP C43 0 01u C50 22p IC3 TA31136FN 1 2 3 4 5 6 7 8 9 AFOUT 10 QUAD 11 IFOUT 12 RSSI 13 N DET 14 N REC 15 GND 16 MIXIN R8 100k R10 47 C189 470p C171 470p R134 390k R4 1k R131 330k C57 10p 2SK1830 Q20 R16 270 L67 C30 470p R21 4 7k R35 120k R14 3 3k C15 12p R189 0 R19 120k C38 0 01u C188 24p C5 0 1u R123 1 8k KTC4082 Q23 CD1 450kHz VR1 100k C44 100p C194 0 1u C25 470p C18 470p C14 470p L8 18n C55 0 01u L45 560n C192 0 01u
33. C56 CK73HB1H471K CHIP C 470PF K C57 CC73HCH1H100D CHIP C 10PF D C61 CK73HB1H471K CHIP C 470PF K C64 CK73HB1H471K CHIP C 470PF K C65 CC73HCH1H100D CHIP C 10PF D C66 CK73GB1C104K CHIP C 0 10UF K C67 CK73HB1H471K CHIP C 470PF K C68 CC73HCH1H100D CHIP C 10PF D C70 CK73GB0J105K CHIP C 1 0UF K C71 CK73HB1H471K CHIP C 470PF K C72 CK73GB1C104K CHIP C 0 10UF K C73 CK73HB1H471K CHIP C 470PF K C75 CK73HB1H471K CHIP C 470PF K C76 CC73GCH1H080D CHIP C 8 0PF D C77 CC73GCH1H470J CHIP C 47PF J C78 CK73HB1H471K CHIP C 470PF K C82 CK73HB1H471K CHIP C 470PF K C83 CK73HB1C103K CHIP C 0 010UF K C84 CK73HB1A104K CHIP C 0 10UF K C86 C93 0766 05 CERAMIC C 56PF J C87 C93 0754 05 CERAMIC C 18PF J C88 CC73GCH1H200G CHIP C 20PF G C89 CC73GCH1H330J CHIP C 33PF J C90 91 CK73HB1H471K CHIP C 470PF K C93 CC73GCH1H030B CHIP C 3 0PF B C94 CK73GB1H471K CHIP C 470PF K C95 CC73GCH1H020B CHIP C 2 0PF B C96 CC73GCH1H010B CHIP C 1 0PF B C97 CC73GCH1H040B CHIP C 4 0PF B C98 CC73GCH1H020B CHIP C 2 0PF B C99 CC73GCH1H050B CHIP C 5 0PF B C100 CC73GCH1H020B CHIP C 2 0PF B C101 CC73GCH1H040B CHIP C 4 0PF B C102 CC73GCH1H030B CHIP C 3 0PF B C105 107 CK73HB1H471K CHIP C 470PF K C108 CC73HCH1H101J CHIP C 100PF J C109 115 CK73HB1H471K CHIP C 470PF K C116 C92 0544 05 CHIP TAN 10UF 4WV C117 118 CK73HB1H471K CHIP C
34. D41 BUSY LED Lights on RX D42 44 Key illumination Key backlight illumination D46 47 LED D48 49 LCD illumination LCD backlight illumination LED D60 Key type detection D61 UHF type detection D62 65 market code detection D69 72 Reverse current Key matrix prevention D73 Voltage drop D74 Over input protection D79 80 Limiter D81 Reverse current prevention COMPONENTS DESCRIPTION Ref No Use Function Operation Condition Compatibility Ref No Use Function Operation Condition Compatibility Q34 Q33 operation On when charging switch Q35 DC IN detection H DC IN detection Q36 Ni MH temperature On when temperature detection is activated detection Q37 AF amplifier Lamp AVR Q38 Q37 operation On when the speaker outputs the audio switch or lamp lights Q41 5MS switch On when 5MS is applied Q47 TX BUSY LED switch Q50 Key LED switch On when the key LED lights Q51 LCD LED On when the LCD LED lights switch Q52 Beat shift switch Q53 5R 5MV switch On when 5R or 5MV is applied Q55 5T switch On when 5T is applied Q56 Speaker mute switch Q57 5C switch On when 5C is applied Q58 Q12 gate Off when High power is selected voltage switch D1 4 VCO frequency control D5 Frequency shift D6 VCO modulation D7 Speed up Ripple filter D8 RF switch On TX D9 RF switch On RX D10 13 Antenna switch On TX D14 Reverse current APC refere
35. ENCB ENCA BUSY LED TX LED ROTARY ENCODER amp VOL KNOB GND ENCA GND ENCB VOLIN VOLOUT 1 VCC VIN RIPPLE D26 C246 DISCHARGE VOUT VSS VIN D33 35 36 REVERSE CURRENT PREVENTION Q38 Q37 OPERATION SW DCDET BTDET 8V BTEMP CHARGE AFAMP 5M B IM MICM TXD SPM RXD MIG PTTE REM TONE VOXIN DTMF BEEP RXLED 5C B 5MS ENCB NAR TO SIGIN MOD 5T 5R QT DQT ENCA VOLIN 5MV R172 10k R186 68k T 4 95V R 0V T 3 29V R 110mV T 73mV R 3 39V T 4 95V R 0V 3 23V 7 14V 4 93V 13 57V 7 12V 11 43V 13 8V 13 40V 4 42V T 0V R 4 90V 2 02V TH K4AT K4E SCHEMATIC DIAGRAM F G H I J X57 675 2 5 TX RX UNIT X57 675X XX A 3 SEG31 SEG5 R313 3 3k R312 4 7k COM3 R275 47k CP33 1k R235 1k COM2 SEG3 SEG26 SEG4 R323 4 7k CP32 1k R318 1k COM3 R342 0 SEG5 R256 1k SEG6 SEG23 SEG18 CP34 1k CP31 3 9k C295 5p R343 0 SEG17 SEG17 SEG1 R285 0 SEG21 IC8 90522BPFFG139 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
36. J 13 8V TX M power Lower limit frequency center frequency upper limit frequency 113 8V TX M power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Turn the encoder to change the current APC value and adjust the transmission power 7 Press the MENU key to write the current APC value into the EEPROM 213 8V TX M power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P13C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX M power Lower limit frequency described on page 32 313 8V TX M power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13H on the LCD In this case the icon appears 2 Press the VFO MR or CA
37. K C179 CK73HB1A104K CHIP C 0 10UF K C180 CC73HCH1H121J CHIP C 120PF J C182 183 CK73HB1A104K CHIP C 0 10UF K C186 CC73HCH1H240J CHIP C 24PF J C187 CC73HCH1H020C CHIP C 2 0PF C C188 CC73HCH1H240J CHIP C 24PF J C189 CK73HB1H471K CHIP C 470PF K C190 192 CK73HB1C103K CHIP C 0 010UF K C193 C92 0507 05 CHIP TAN 4 7UF 6 3WV C194 CK73HB1A104K CHIP C 0 10UF K C195 C92 0628 05 CHIP TAN 10UF 10WV C196 197 CK73GB1C273K CHIP C 0 027UF K C198 CK73EF1C105Z CHIP C 1 0UF Z C200 CK73HB1C103K CHIP C 0 010UF K C201 CK73HB1H122K CHIP C 1200PF K C202 CK73HB1H271K CHIP C 270PF K C203 CC73HCH1H121J CHIP C 120PF J C204 CK73HB1A333K CHIP C 0 033UF K C205 CK73HB1A473K CHIP C 0 047UF K C206 CK73HB1C183K CHIP C 0 018UF K C207 CK73HB1C223K CHIP C 0 022UF K C208 CC73HCH1H820J CHIP C 82PF J C209 CK73HB1H471K CHIP C 470PF K C210 CK73HB1C103K CHIP C 0 010UF K C211 CK73HB1H222K CHIP C 2200PF K C212 CK73HB1C123K CHIP C 0 012UF K C213 C92 0714 05 TANTALUM C 4 7UF 6 3WV C219 CK73HB1A473K CHIP C 0 047UF K C220 CK73HB1E472K CHIP C 4700PF K C221 222 CK73HB1C103K CHIP C 0 010UF K C223 CK73HB1H471K CHIP C 470PF K C224 CK73HB1A104K CHIP C 0 10UF K C225 CK73GB0J105K CHIP C 1 0UF K C226 CK73HB1A104K CHIP C 0 10UF K C227 C92 0587 05 CHIP TAN 2 2UF 4WV C228 229 CK73HB1A104K CHIP C 0 10UF K C230 CK73FB1C105K CHIP C 1 0UF K C231 CK73H
38. LCD and key illumination LEDs are lighted by controlling Q51 for the LCD and Q50 for keys according to the output voltage from the AF LAMP AVR Q37 The BUSY and TX illumination LEDs are lighted by controlling Q47 B AF AMP D33 Q38 Q37 56 LAMP IC8 MPU 99 RX LED D48 D49 D42 D43 D46 Q50 D41 BUSY LED R227 D40 TX LED R226 5C 5T D42 D43 Q51 Q47 D42 D43 D44 D47 Fig 13 LED drive circuit CIRCUIT DESCRIPTION TH K4AT K4E 12 Key and Encoder Input Circuit The POWER key is assigned to the interrupt port pin 95 of the MPU The PTT key is assigned to the dedicated port pins 13 14 of the MPU SET CALL 0 MONI MR 9 8 7 LAMP VFO 6 5 4 MENU F 3 2 1 KIN0 KOUT0 KOUT1 KOUT2 KOUT3 PWRSW 95 S7 POWER SW J3 ROTARY ENCODER KIN1 KIN2 KIN3 KIN4 IC8 MPU PTTI 14 PTTE 13 ENCB 36 ENCA 35 SET MONI LAMP MENU CALL MR VFO F KIN0 KOUT0 KOUT1 KOUT2 KOUT3 95 S7 J3 KIN1 KIN2 KIN3 KIN4 IC8 MPU PTTI 14 PTTE 13 ENCB 36 ENCA 35 PWRSW POWER SW ROTARY ENCODER Other keys composes a matrix and key presses are detected by scanning them by software The encoder reads data using the interrupt port pins 35 and 36 of the MPU 16 key M2 type Fig 14 Key and Encoder input circuit 4 key E type CIRCUIT DESCRIPTION TH K4AT K4E
39. PLLEN 102 PLLLD 103 KIN0 104 KIN1 105 KIN2 106 KIN3 107 KIN4 108 TYPE 109 VUKEY 110 MICM 111 NOAA 112 5R 113 SHIFT 114 5T 115 KOUT0 116 KOUT1 117 KOUT2 118 KOUT3 119 VSS 120 BTDET C186 24p C1 0 01u C11 470p C256 1000p R20 1k SEG2 C223 470p C168 0 1u SEG1 R153 1k R310 3 9k C46 100p D36 RB521S 30 C242 0 01u C309 1u CP1 2 7k D27 RB706F 40 C345 470p R15 5 6k R5 100k R216 10k R286 0 R124 3 3k SEG24 C41 4 7u6 3 C27 10u10 L46 560n R207 1k C294 5p SEG19 C239 470p CF1 L72 0968 05 C208 82p R177 10k L9 22n C366 470p D72 MA2S111 C4 470p 2SJ347 Q36 SEG6 C205 0 047u R242 330k SEG19 C224 0 1u R9 150 R173 15k R147 10k C249 470p R326 0 R236 1k IC11 S 80930CNNBG80 1 VSS 2 VDD 4 OUT 3 CD D35 RB521S 30 CN8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SEG16 SEG11 C307 0 1u R135 470k C45 100p R116 120k R346 100 R210 12 SEG18 R37 27k R152 2 2k J2 R355 0 SEG30 R332 15 L63 S7 S70 0485 05 C317 470p R18 33 SEG22 C300 470p R197 100 C360 0 1u R7 47k D24 MA742 C281 470p C365 470p IC6 TA7368F 1 2 3 4 5 6 NF 7 PHASE
40. R120 RK73HB1J272J CHIP R 2 7K J 1 16W R122 RK73HB1J272J CHIP R 2 7K J 1 16W R123 RK73HB1J182J CHIP R 1 8K J 1 16W R124 RK73HB1J332J CHIP R 3 3K J 1 16W R125 RK73HB1J561J CHIP R 560 J 1 16W R126 RK73HB1J273J CHIP R 27K J 1 16W R127 RK73HB1J470J CHIP R 47 J 1 16W R128 RK73HB1J332J CHIP R 3 3K J 1 16W R130 RK73HB1J101J CHIP R 100 J 1 16W R131 RK73HB1J334J CHIP R 330K J 1 16W R132 RK73HB1J222J CHIP R 2 2K J 1 16W R133 RK73HB1J102J CHIP R 1 0K J 1 16W R134 RK73HB1J394J CHIP R 390K J 1 16W R135 RK73HB1J474J CHIP R 470K J 1 16W R137 RK73HB1J472J CHIP R 4 7K J 1 16W R139 RK73HB1J472J CHIP R 4 7K J 1 16W R140 RK73HB1J103J CHIP R 10K J 1 16W R141 142 RK73HB1J102J CHIP R 1 0K J 1 16W R143 RK73HB1J273J CHIP R 27K J 1 16W R144 R92 1368 05 CHIP R 0 OHM R145 146 RK73HB1J472J CHIP R 4 7K J 1 16W R147 RK73HB1J103J CHIP R 10K J 1 16W R148 RK73HB1J562J CHIP R 5 6K J 1 16W R151 RK73HB1J122J CHIP R 1 2K J 1 16W R152 RK73HB1J222J CHIP R 2 2K J 1 16W R153 RK73HB1J102J CHIP R 1 0K J 1 16W R154 RK73HB1J472J CHIP R 4 7K J 1 16W R155 156 RK73HB1J104J CHIP R 100K J 1 16W R157 158 RK73HB1J334J CHIP R 330K J 1 16W R159 RK73HB1J124J CHIP R 120K J 1 16W R160 RK73HB1J472J CHIP R 4 7K J 1 16W R161 RK73HB1J182J CHIP R 1 8K J 1 16W R162 RK73HB1J274J CHIP R 270K J 1 16W R163 RK73HB1J474J CHIP R 470K J 1 16W R164 RK73HB1J473J CHIP R
41. R61 62 RK73HB1J271J CHIP R 270 J 1 16W R64 R92 1368 05 CHIP R 0 OHM R70 72 RK73EB2ER39K CHIP R 0 39 K 1 4W R74 75 RK73HH1J104D RESISTOR 100K D 1 16W R76 79 RK73HH1J154D RESISTOR 150K D 1 16W R80 RK73HB1J103J CHIP R 10K J 1 16W R81 RK73HB1J394J CHIP R 390K J 1 16W R82 RK73HB1J273J CHIP R 27K J 1 16W R83 RK73HB1J563J CHIP R 56K J 1 16W R84 RK73HB1J104J CHIP R 100K J 1 16W R85 RK73GB1J561J CHIP R 560 J 1 16W R86 RK73HB1J562J CHIP R 5 6K J 1 16W R88 RK73HB1J331J CHIP R 330 J 1 16W R90 RK73HB1J331J CHIP R 330 J 1 16W R91 RK73HB1J102J CHIP R 1 0K J 1 16W R92 RK73HB1J332J CHIP R 3 3K J 1 16W R93 RK73HB1J470J CHIP R 47 J 1 16W R94 RK73HB1J331J CHIP R 330 J 1 16W R95 RK73HB1J184J CHIP R 180K J 1 16W R96 RK73HB1J104J CHIP R 100K J 1 16W R97 RK73HB1J154J CHIP R 150K J 1 16W R98 RK73HB1J104J CHIP R 100K J 1 16W R99 100 RK73HB1J105J CHIP R 1 0M J 1 16W R101 RK73HB1J470J CHIP R 47 J 1 16W R103 RK73HB1J182J CHIP R 1 8K J 1 16W R104 RK73HB1J151J CHIP R 150 J 1 16W R107 RK73HB1J104J CHIP R 100K J 1 16W R108 RK73HB1J124J CHIP R 120K J 1 16W R109 RK73HB1J104J CHIP R 100K J 1 16W R110 111 RK73HB1J105J CHIP R 1 0M J 1 16W R115 RK73HB1J562J CHIP R 5 6K J 1 16W R116 RK73HB1J124J CHIP R 120K J 1 16W R117 RK73HH1J272D RESISTOR 2 7K D 1 16W R118 RK73HB1J273J CHIP R 27K J 1 16W R119 RK73HB1J182J CHIP R 1 8K J 1 16W
42. VCC CHARGE LAMP AFAMP NAR COM0 COM1 CLOCK DATA EEPDI EEPCS VOX BPF APC KAPC VCC AFM SPM RXD TXD PTTE PTTI 5C SAVE FINAL SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 KAPC AFM SHIFT FINAL CLOCK DATA PLLEN PLLLD 5MS 5MV CLOCK 5T NAR VOLIN B SQV SMV PLLLD KAPC AFM PLLEN SHIFT TO MOD 5R 5C DATA QT DQT FINAL TEMP 5M QT DQT 5MV B SQV SMV DATA KAPC PLLLD AFM PLLEN SHIFT NAR 5T 5MS TO MOD 5R 5C VOLIN CLOCK TEMP FINAL 5M BATT LAMP 5MS SW SI SCK HOLD VCC CS SO WP GND 5M B 8V IM MIG 5M PTTI 5C SW 5R SW 5T SW VOX EEPCS EEPDI BPF APC INT0 PWR SW RESET KIN4 KOUT2 KIN0 KOUT1 TYPE KIN1 VUKEY KOUT0 KOUT3 KIN3 KIN2 5M B 5C 5R 5T AVR IM MIG 8V RESET 5R SW 5T SW PWR SW INT0 VUKEY KIN3 KOUT0 TYPE KIN2 KOUT3 KOUT1 KIN1 KIN0 KIN4 KOUT2 VOX BPF APC EEPDI EEPCS 5C SW PTTI 5M BATT 5MS SW LAMP 5C 5MS DATA CLOCK D61 UHF TYPE DETECTION KEY TYPE DETECTION D60 D48 49 LCD ILLUMINATION LED 5T NAR VOLIN B SHIFT PLLLD 5C PLLEN AFM KAPC DATA QT DQT 5MS 5R TO MOD CLOCK S
43. backs up data in EEPROM IC15 and turns the power off Fig 11 Reset and Backup circuit CIRCUIT DESCRIPTION TH K4AT K4E 11 Voltage Detection Circuit Various voltages are input to the A D port of the MPU IC8 for processing Battery voltage is divided with resistors R240 R241 and enters the BATT terminal pin 52 of the MPU Battery voltage is used for battery meter indication during transmission or for alert tone processing when an abnormal power supply voltage approx 16 5 V or higher is applied Squelch voltage becomes DC voltage by detecting changes in noise voltage in the FM IC IC3 and the signal is used for squelch control The S meter voltage is output from the RSSI pin of the FM IC to control S meter display Detection of thermistor voltage temperature in the Ni MH battery during charging detection of remote microphone key pressing and VOX voltage monitoring are performed through each A D port of the MPU Battery Save Circuit If there is no signal squelch off scan off or no key operation for longer than 10 seconds the transceiver will enter the battery save mode Battery save operation is performed by controlling Q57 with an output signal from the 5C SAVE terminal pin 15 of the MPU The 5C ON OFF cycle ratio during battery saving can be set from a transceiver menu 5MS 5C 5M Q41 Q57 37 15 5MS 5C SAVE IC8 MPU Fig 12 Battery save circuit LED Drive Circuit The
44. modulation Drive and Final Circuit The output signal from VCO Q1 passes through an RF amplifier Q2 Q5 Q9 and drive amplifier Q10 Q11 and is amplified by a power amplifier Q12 Transmission Reception Switching Circuit The signal amplified by the power amplifier Q12 passes through a transmission reception switching circuit and a low pass filter and is fed to the antenna MIC IC5 HPF IC16 MIC AMP Pre emphasis Splatter filter VCO Limiter 6 1 Fig 5 Microphone amplifier circuit MIC HPF MIC AMP IC16 ANT SW D10 D11 L19 D12 D13 VCO Q1 LPF IC5 VR5 MAX DEV Q2 RF AMP Q5 RF AMP Q9 RF AMP Q10 DRIVE AMP Q11 DRIVE AMP Q12 POWER AMP ANT Fig 6 Modulation Drive Final and Transmission reception switching circuit APC Circuit The APC Automatic Power Control circuit is used to obtain a stable transmission power and controls transmission output by detecting the drain current of Q11 and Q12 The transmission output can be changed in three levels High Mid and Low The reference voltage is output from the BPF APC terminal pin 6 of the MPU IC8 and the detection voltage generated by R70 R71 and R72 are fed to the APC differential amplifier IC2 The voltage in proportion to the difference between reference voltage and detection voltage is output from the BOUT terminal pin 7 of IC2 as an APC voltage Q10 Q15 Q11 Q12 VGG
45. of 1Tone deviation Lower limit frequency described on page 33 N DCS deviation Lower limit frequency center frequency upper limit frequency 1DCS deviation Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display DVL on the LCD In this case the icon appears Press the F key and then the PTT key repeatedly to turn the icon ON The current adjustment value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD ADJUSTMENT TH K4AT K4E 34 ADJUSTMENT 4 Press the CALL key to switch to the adjustment display 5 When the PTT key is pressed to enable transmit mode a preset DCS code 023 is internally generated and modulated 6 Turn the encoder to change the current adjustment value and adjust DCS deviation 7 Press the MENU key to write the current adjustment value into the EEPROM 2DCS deviation Center frequency 1 Press the LAMP or MONI key on the transceiver to display DVC on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 7 of 1
46. terminal side Rear charge terminal side Thermister DTN 103F3H SYS T Diode ERB83 004 Breaker BBS80A2Y 01 80 C Breaker BBS70 A1N 01 70 C 4N 2N Thermister DTN 103F3H SYS Voltage 7 2V 1 2V x 6 Charging current 1100mAh Dimensions Projections included 58W x 100 8H x 16 8D mm Charger and charging time KSC 24 Rapid charger Approx 60 minutes Weight 210g PB 43N Specifications TH K4AT K4E 59 BT 14 BATTERY CASE PG 4Y PROGRAMMING INTERFACE CABLE MCP 1A MEMORY CONTROL PROGRAM BT 14 6 AA LR6 External View PG 4Y External View MCP 1A Available free for downloading from the Kenwood website http www kenwood com i products info amateur html TH K4AT K4E SPECIFICATIONS KENWOOD CORPORATION 2967 3 Ishikawa machi Hachioji shi Tokyo 192 8525 Japan KENWOOD U S A CORPORATION P O BOX 22745 2201 East Dominguez Street Long Beach CA 90801 5745 U S A KENWOOD ELECTRONICS CANADA INC 6070 Kestrel Road Mississauga Ontario Canada L5T 1S8 KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembr cker Str 15 63150 Heusenstamm Germany KENWOOD ELECTRONICS BELGIUM N V Leuvensesteenweg 248 J 1800 Vilvoorde Belgium KENWOOD ELECTRONICS FRANCE S A 13 Boulevard Ney 75018 Paris France KENWOOD ELECTRONICS U K LIMITED KENWOOD House Dwight Road Watford Her
47. the AF output volt age at 0 58V rms The RF and IF sections are measured by using a spectrum analyzer Each voltage of the AF section is measured by using an AF VTVM or osciloscope The level for each point is measured without removing parts or cutting the pattern Transmitter Section Receiver Section TH K4AT K4E 56 BLOCK DIAGRAM J3 Q23 TCXO LOOP FILTER LPF Q6 D1 2 3 4 Q1 Q3 SHIFT SW OSC 12 8MHz D74 D79 IC5 HPF Q30 VOX AMP Q29 D22 D27 MIC AGC IC16 SPLATTER FILTER LIMITTER AMP Q27 WIDE NARR IC8 MPU HVC376B 2SK508NV 52K 2SK1830 KTC4082 2SK1830 2SC4617 R 2SC4919 1SS361 RB706F 40 NJM2107F NJM2904V DA221 TRIPLER 2nd Local INT S 80844 CNNBB85 IC10 RESET IC11 S 80930 CNNBG80 IC15 AT25160N 10SI27 EEPROM BEAT SHIFT Q52 RN1107 LCD 1SV278 D6 REM SQ SM BATT DTMF BEEP TONE BPF APC SEG0 31 COM0 3 RXD PTTE PTTI ENCA ENCB PWRSW KIN0 4 TYPE AFM SPM MICM KAPC FINAL CHARGE AFAMP RXLED BTDET TXD 5MS 5R 5T 5C SAVE VOX KYO0 3 VUKEY VCC DVCC AVCC AVRH HST VCC V3 RESET INTUP INTDW CLOCK DATA EEPCS EEPDI BSFT X0 X1 PLLEN PLLLD CLOCK DATA BTEMP KEY ILLMI B30 2205 05 D42 43 46 D44 47 2SK1830 Q50 KEY ILLMI SW LAMP PTT LAMP MONI D48 49 RN4902 LCD ILLMI SW Q51 B30 2205 05 LCD ILLMI DCDET MOD PTTI KIN4 KYO1 KY
48. the frequency display it switches to the adjustment display Write adjustment values adjustment display Sound error tone frequency display Function mode MHz mode ON VFO mode When this key is pressed on the adjustment display it switches to the frequency display Memory mode When this key is pressed on the adjustment display it switches to the frequency display Switch between frequency display and adjustment display Each time this key is pressed the LCD switches between the frequency display and adjustment display Increase or decrease adjustment values 00 FE adjustment display Increase or decrease frequency and memory channel number frequency display F key key Selecting a TX power High Mid Low Lamp always ON Squelch level setting mode Function mode MHz mode OFF M V Memory shift M IN Memory registration Increase or decrease frequency 1MHz step frequency display TH K4AT K4E 29 D S meter Two segments in S meter light all segments in S meter light 1S meter Two segments in S meter light 1 Press the LAMP or MONI key on the transceiver to display S1 on the LCD The current RSSI level value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the MENU key to write the current RSSI level value into the EEPROM 2S meter All segments in S meter light 1 P
49. voltage input for S meter A D 50 VOXIN I Microphone voltage input for VOX A D 51 THERM I TX temperature compensation input A D 52 BATT I Battery voltage input A D 53 BTEMP I Detection of thermistor voltage temperature in the Ni MH battety A D 54 VCC Positive power supply 55 CHARGE O Battery charge circuit power supply switch H ON 56 LAMP O Lamp power supply switch H ON 57 AFAMP O AF amplifier Lamp AVR power supply switch H ON 58 NAR O Wide Narrow switching H Narrow 59 COM0 O LCD common output 0 60 COM1 O LCD common output 1 61 COM2 O LCD common output 2 62 COM3 O LCD common output 3 63 VSS GND 64 SEG16 O LCD segment output 16 65 SEG17 O LCD segment output 17 66 SEG18 O LCD segment output 18 67 SEG19 O LCD segment output 19 68 SEG20 O LCD segment output 20 69 SEG21 O LCD segment output 21 70 SEG22 O LCD segment output 22 71 SEG23 O LCD segment output 23 72 SEG24 O LCD segment output 24 73 NC Not used 74 NC Not used 75 SEG25 O LCD segment output 25 76 SEG26 O LCD segment output 26 77 SEG27 O LCD segment output 27 78 SEG28 O LCD segment output 28 79 SEG29 O LCD segment output 29 80 SEG30 O LCD segment output 30 81 SEG31 O LCD segment output 31 82 V0 Not used 83 V1 Not used 84 V2 Not used 85 V3 LCD drive power supply 3 86 HST VC
50. 0580 05 MIC ELEMENT D1 4 HVC376B VARIABLE CAPACITANCE DIODE D5 HSC277 DIODE D6 1SV278 VARIABLE CAPACITANCE DIODE D7 MA2S111 DIODE D8 9 HSC277 DIODE D10 13 HVC131 DIODE D14 RB521 S30 DIODE D15 MA8039 ZENER DIODE D16 MA2S111 DIODE D18 21 1SV305 VARIABLE CAPACITANCE DIODE D22 1SS361 DIODE D24 MA742 DIODE D25 MA2S111 DIODE D26 1SS388 DIODE D27 RB706F 40 DIODE D30 RB521S 30 DIODE D31 DA221 DIODE D32 33 RB051L 40 DIODE TH K4AT K4E PARTS LIST 22 TX RX UNIT X57 675X XX Destination Ref No Parts No Description Address New parts Destination Ref No Parts No Description Address New parts E TH K4E M2 TH K4AT D34 MAZS0270H ZENER DIODE D35 36 RB521S 30 DIODE D60 62 MA2S111 DIODE E D61 MA2S111 DIODE M2 D63 65 MA2S111 DIODE M2 D64 65 MA2S111 DIODE E D69 73 MA2S111 DIODE D74 HSM88AS DIODE D79 80 DA221 DIODE D81 RB521S 30 DIODE IC1 LMX2316TMX MOS IC IC2 NJM2904V MOS IC IC3 TA31136FN MOS IC IC4 XC6202PB52FR MOS IC IC5 NJM2107F MOS IC IC6 TA7368F MOS IC IC8 90522BPFFG139 MPU IC9 TK11250CM MOS IC IC10 S 80844CNNBB85 MOS IC IC11 S 80930CNNBG80 MOS IC IC12 TK11250CUCB MOS IC IC15 AT25160N10SI27 ROM IC IC16 17 NJM2904V MOS IC Q1 2SK508NV 52K FET Q2 2SC5488 TRANSISTOR Q3 2SK1830 FET Q4 2SC4617 R TRANSISTOR Q5 6 2SC5488 TRANSISTOR Q9 2SC5488 TRANSI
51. 0UF K C310 CK73EF1C105Z CHIP C 1 0UF Z C311 CK73GB1C104K CHIP C 0 10UF K C312 313 CK73HB1A393K CHIP C 0 039UF K C314 CK73HB1H471K CHIP C 470PF K C316 CK73GB1C104K CHIP C 0 10UF K C317 318 CK73HB1H471K CHIP C 470PF K C319 C92 0628 05 CHIP TAN 10UF 10WV C323 324 CK73HB1H471K CHIP C 470PF K C326 CK73HB1H471K CHIP C 470PF K C327 CK73HB1A104K CHIP C 0 10UF K C328 CK73GB0J105K CHIP C 1 0UF K C329 CC73FCH1H120J CHIP C 12PF J C330 331 CK73HB1H471K CHIP C 470PF K C332 CK73HB1A104K CHIP C 0 10UF K C335 336 CK73HB1A104K CHIP C 0 10UF K C338 CK73FB1C105K CHIP C 1 0UF K C339 CK73HB1A473K CHIP C 0 047UF K C344 348 CK73HB1H471K CHIP C 470PF K C349 CK73HB1A104K CHIP C 0 10UF K C351 CK73HB1C103K CHIP C 0 010UF K C352 354 CK73HB1H471K CHIP C 470PF K C355 356 CK73HB1C103K CHIP C 0 010UF K C357 CK73EF1C105Z CHIP C 1 0UF Z C358 CK73HB1A473K CHIP C 0 047UF K C359 360 CK73HB1A104K CHIP C 0 10UF K C361 CK73HB1H471K CHIP C 470PF K C363 CC73HCH1H100C CHIP C 10PF C C364 CC73FCH1H180J CHIP C 18PF J C365 367 CK73HB1H471K CHIP C 470PF K C368 CK73GB1H471K CHIP C 470PF K C369 371 CK73HB1H471K CHIP C 470PF K C372 CK73GB1H471K CHIP C 470PF K C374 CC73HCH1H101J CHIP C 100PF J E C510 CK73HB1A473K CHIP C 0 047UF K C511 CK73HB1H471K CHIP C 470PF K C512 CC73HCH1H101J CHIP C 100PF J E CN1 E40 5915 05 FLAT CABLE CONNECTOR
52. 0p L10 18n R45 3 3k L22 4T 4T R42 0 R347 150 R58 47 C88 20p G D10 HVC131 C70 1u C86 56p L23 1u L11 15n L16 L13 L56 6 8n R289 0 R51 470 C102 3p B R50 33 D9 HSC277 L15 4 7n C77 47p C89 33p R61 270 C357 1u D11 HVC131 C84 0 1u C327 0 1u 2SC5488 Q9 C87 18p C73 470p R344 47 R52 1k C101 4p B C90 470p C76 8p C98 2p B C65 10p C326 470p D74 HSM88AS C68 10p 2SC4926YD Q10 R59 12k R34 3 3k R348 68 R85 560 R77 150k D Q14 RN4902 R78 150k D C113 470p R86 5 6k TH1 10k C118 470p C112 470p R74 100k D D14 RB521S 30 R71 0 39 R70 0 39 R83 56k C109 470p 2SK1830 Q13 C105 470p C108 100p R82 27k C106 470p C115 470p C111 470p C117 470p R76 150k D C512 R75 100k D R80 10k IC2 NJM2904V 1 AOUT 2 A IN 3 A IN 4 GND 5 6 7 8 R84 100k R81 390k C107 470p R72 0 39 C116 10u4 C114 470p R79 150k D D15 MA8039 C356 0 01u C110 470p L25 C132 0 01u C164 470p C162 470p 3SK318 Q16 C128 0 01u R107 100k L36 56n R88 330 D20 1SV305 R103 1 8k L40 4 7n R97 150k C131 0 01u L26
53. 1 LOOP FILTER TO TCXO 5C 5 0V 5MS 5 0V PLL 5C 5 0V VC X1 12 8MHz CLOCK DATA LE Fo LD IF Rectifier LPF Q6 RF Amp D1 D4 VCO 5C 5 0V LV 1 5V SHIFT H L Ripple Filter Q4 OSC Q1 Buff Amp Q2 RF Amp Q5 SW D8 D9 MOD SHIFT SW Q3 MOD 12 8MHz TX RX 5T 5 0V 5R 5 0V VR1 Fig 8 PLL and VCO circuit amplifying VCO output with an RF amplifier Q6 and dividing it with the PLL IC The PLL synthesizer with 5 kHz and 6 25 kHz step is configured by comparing phases of the reference frequency and comparison frequency The phase difference between reference frequency and comparison frequency passes through a charge pump in the PLL IC then ripples are removed with a loop filter with low range passing characteristics to produce VCO control voltage lock voltage VCO Circuit The VCO produces a desired frequency directly with a Colpits oscillation circuit containing an oscillation transistor Q1 used for both transmission and reception The VCO control voltage is applied to varicap D1 D2 D3 D4 to produce a desired frequency The SHIFT terminal pin 113 of the MPU IC8 goes H during transmission and the shift control switch Q3 is turned ON to change oscillation frequency Fo LD PLL LD IC8 MPU IC1 PLL IC R32 D16 C40 R35 14 102 5C Fig 9 Unlock detection circuit Unlock Detection Circuit When the PLL
54. 1 17 SEG12 18 SEG13 19 SEG14 20 SEG15 21 SEG16 22 SEG17 23 SEG18 24 SEG19 25 SEG20 26 SEG21 27 SEG22 28 SEG23 29 SEG24 30 SEG25 31 SEG26 32 SEG27 33 SEG28 34 SEG29 35 SEG30 36 SEG31 SEG7 SEG26 C336 0 1u SEG25 SEG16 SEG15 SEG31 SEG20 SEG4 COM1 SEG10 BEAT SHIFT SW 5C 5R 5T AVR 5C 5R 5T AVR ENCB ENCA SQV MPU SMV PTTE SPM RXD TXD TEMP 8V BTDET DCDET 5M CHARGE B BTEMP AFAMP TXD IM RXD MIG SPM PTTE MICM RXD IM SPM PTTE MIG TXD REM TONE VOXIN DTMF BEEP RXLED SIGIN VOLIN NAR ENCA MOD ENCB 5C TO 5MS 5R QT DQT 5T 5MV B SEG14 SEG15 VSS C0R1 ENCA ENCB 5MS DVCC DVSS DTMF BEEP TONE AVCC AVRH AVRL AVSS REM SIGIN SQ SM VOXIN THERM BATT BTEMP VCC CHARGE LAMP AFAMP NAR COM0 COM1 CLOCK DATA EEPDI EEPCS VOX BPF APC KAPC VCC AFM SPM RXD TXD PTTE PTTI 5C SAVE FINAL SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 KAPC AFM SHIFT FINAL CLOCK DATA PLLEN PLLLD 5MS 5MV CLOCK 5T NAR VOLIN B SQV SMV PLLLD KAPC AFM PLLEN SHIFT TO MOD 5R 5C DATA QT DQT FINAL TEMP 5M BATT LAMP 5MS SW 5M B 8V
55. 12 3147 03 30 BELT HOOK ASSY J29 0709 04 1 CABINET ASSY BATTERY CASE A02 3817 02 TH K4AT K4E 27 ADJUSTMENT Single Tone Mode This mode is used to check the DTMF deviation Operation 16key M2 type 1 Press the PTT key on the transceiver to switch to the transmission mode 2 Press the MONI key to enter the single tone mode 3 Press any key from 1 to 8 keys to transmit a single tone The single tone is consisting of eight frequencies 1 697Hz 2 770Hz 3 852Hz 4 941Hz 5 1209Hz 6 1336Hz 7 1477Hz 8 1633Hz 4 When the MONI key is pressed again during the transmission the transceiver switches to the reception mode the single tone mode turns OFF 4key E type 1 Press the PTT key on the transceiver to switch to the transmission mode 2 Press the MONI key to enter the single tone mode 3 When the VFO key is pressed during the transmission a DTMF D dual tone combination of 1633 Hz and 941 Hz frequencies is transmitted 4 When the MR key is pressed during the transmission single tone 1633 Hz is transmitted 5 When the MONI key is pressed again during the transmission the transceiver switch to the reception mode the single tone mode is turned OFF The single tone mode can be enabled only during the transmission When DTMF memory is transmitted in the single tone mode the single tone mode turns OFF Adjustment Mode This mode is used
56. 13 CTCSS DCS The encode signal is generated by the MPU IC8 and output from the TONE terminal pin 41 of the MPU The unwanted high frequency components of the encode signal output from the MPU are removed with a low pass filter and applied to VCO modulation input MOD and TCXO VC terminal for modulation The VCO and TCXO modulation levels are adjusted by VR6 to produce flat modulation characteristics in low and high ranges The decode signal is input to the SIGIN pin pin 47 of the MPU after the waveform of the audio signal from the FM IC is rectified with a CTCSS DCS filter IC17 Then the set CTCSS tone frequency and DCS code are detected by digital signal processing in the MPU to control muting LPF VR6 VCO VOL OUT MOD X1 TCXO VC IC16 1 6 MIC AMP IC5 HPF MIC IC6 AF AMP Vin IC8 MPU TONE 41 40 47 9 SIG IN VOX IN DTMF BEEP IC17 D24 Q30 IC3 CTCSS DCS FILTER FM IC 50 VR5 AMP DTMF The DTMF signal is generated by the MPU IC8 and is output from the DTMF BEEP terminal pin 40 of the MPU The DTMF signal is mixed with an audio signal at the input side of the AF amplifier IC6 and is output as a monitor tone The DTMF signal is mixed with a modulation signal at the input side of pre emphasis in the microphone amplifier IC16 and used as a transmit signal VOX The IC5 and Q30 amplify the audio signal captured in the microphone and then t
57. 137 4 7k SEG26 VR1 100k C314 470p R209 100k R248 3 9k C237 10u10 C336 0 1u R217 820 SEG25 Q41 RN2105 C348 470p D62 C44 100p SEG16 R190 47k C271 470p C198 1u D47 2SB1184 Q R Q37 C194 0 1u C272 470p C25 470p SEG15 2SB1184 Q R Q33 C196 0 027u R196 10k C253 10u10 C18 470p C14 470p SEG31 SEG20 C209 470p L8 18n R192 470 R175 2 2k SEG4 2SK1830 Q50 C55 0 01u D49 B30 2237 05 L45 560n COM1 C306 47p SEG10 D44 C192 0 01u C283 470p R214 10k D13 HVC131 R47 5 6k L65 27n 2SK2596 Q11 C78 470p C96 1p B CN10 L17 2 5n L21 4T R41 270 D73 MA2S111 2SK3476 Q12 D12 HVC131 C82 470p C364 18p L54 4 7n C363 10p C61 470p R56 10k L18 220n C369 470p C83 0 01u R64 0 C361 470p R46 10k R39 270 L19 4T C93 3p B 2SK1830 Q58 C324 470p C97 4p B C100 2p B C95 2p B 2SC4617 R Q15 R271 12 R33 22 D8 HSC277 L14 4 7n L20 4T R54 47 C75 470p C94 470p L30 C66 0 1u R55 4 7k C328 1u C67 470p R49 1k R62 270 C64 470p C72 0 1u C71 470p R53 1k R60 56k C329 12p C91 470p C99 5p B C323 47
58. 32 313 8V TX L power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13H on the LCD In this case the icon appears ADJUSTMENT TH K4AT K4E 33 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX L power Lower limit frequency described on page 32 L DCS modulation balance 1 Press the LAMP or MONI key on the transceiver to display DCS BAL on the LCD Press the F key and then the PTT key repeatedly to turns the icon ON 2 When the PTT key is pressed to enable transmit mode a 100Hz square waveform is internally generated and modulated 3 While observing the waveforms on the oscilloscope turn the semi fixed volume VR6 to adjust the DCS modulation waveform to a square waveform 4 When the DCS modulation waveform becomes a square waveform release the PTT key M Tone deviation Lower limit frequency center frequency upper limit frequency 1Tone deviation Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display DVL on the LCD In this case the icon appears Press the F key and then the PTT key repeatedly to turn the icon ON The current adjustment value is displayed at the lower digits of the frequency display and the value stored in the EEPR
59. 33 IC12 AVR 2SB1184 Q R 2SC4617 R IC4 5MS SW Q55 5MV SW Q36 RB521S 30 DC IN DET RN2105 AF AMP 2SB1184 Q R PROTECT 5 0V 11 5V AF LAMP AVR RN2105 Q53 PROTECT THERM DET 2SK1830 B RB051L 40 Q33 AVR IC9 B PROTECT D36 RB521S 30 D35 PROTECT RB521S 30 PROTECT D30 RB521S 30 IC8 MPU D31 DA221 CONSTANT CURRENT BTEMP DCDET BATT TERMINAL 7 5V Norminal 6 0 9 0V DC IN 13 8V Norminal 12 0 16 0V IC1 TCXO Q4 5 6 D40 41 5R 5T VR1 ENC 5C Q9 10 13 D8 10 TH1 IC16 Q47 5MV IC3 17 D9 14 Q16 17 Q22 23 24 IC5 Q30 5MS Fig 10 Charging and Power supply switching circuit Control System Reset and Backup Circuit When power is supplied to the transceiver the 5M voltage goes H as C303 is charged A rising edge of the 5M voltage is detected by the voltage detection IC IC11 and when its output RESET goes H the reset status of the MPU is released D35 R244 5M 5C C307 R243 L63 BATT 5V AVR IC9 IC8 MPU IC15 EEPROM Timing chart Power ON 5V 5M 0 Power OFF IN OUT C303 IC11 IN OUT RESET IC10 IN OUT INT 5V RESET 0 5V INT 0 If the supplied voltage to the transceiver is reduced and the 5M voltage falls below the detection voltage of the voltage detection IC IC10 the MPU detects it by an interrupt processing
60. 37 R38 R188 R189 L63 C344 L64 C345 C346 L67 C347 C348 C349 VR1 VR5 MAX DEV VR6 C351 C354 C355 C356 C359 C166 C167 R58 C168 C169 C360 C170 C171 C172 C173 C368 C174 C175 C176 C370 C371 C372 R70 C180 R71 R72 C182 C183 R74 R75 R76 C186 R77 C187 R78 C188 R79 C189 R80 C190 R81 C191 R82 C192 C193 R83 R84 C194 R85 C195 R86 C196 C197 C198 CN2 INT SP R90 CN6 X1 CN9 CP1 CP2 R202 R203 R204 IC10 1 1 2 3 4 4 1 3 4 5 5 8 R205 IC11 1 2 3 4 R206 R207 R208 R209 IC15 IC17 LV B BTEMP GND 1 8 9 16 1 8 9 16 DCS BAL FREQ D S G D S G D S G 1 4 5 8 SET POWER J72 0884 19 A 3 LCD ANT 44 45 TH K4AT K4E PC BOARD Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Component side view J72 0884 19 A 3 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Component side view J72 0884 19 A 3 PC BOARD TH K4AT K4E Ref No Address IC1 4D IC2 8F IC3 9B IC6 6M IC9 9P IC10 6P IC11 6Q IC15 7P Ref No Address IC17 9I Q4 4C Q6 3E Q12 5J Q13 7F Q14 9E Q15
61. 4 When the Adjustment Mode is set the Overvoltage warning reference voltage 14 8V DC IN adjustment item is displayed The icon on the upper side of the LCD blinks while the transceiver is in the Adjustment Mode The current adjustment value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 5 The functions of transceiver keys in Adjustment Mode are as follows Short these two lands SET Adjustment item Blink The value stored in the EEPROM 00 FE Current adjustment value 00 FE TH K4AT K4E 28 6 To exit the Adjustment Mode turn the transceiver OFF Note When you press LAMP or MONI key ensure the bosses of rubber keys align with the LAMP and MONI contacts of the PTT PCB C 3 In the Adjustment Mode Transmission and Reception frequencies becomes extensive A Overvoltage warning reference voltage 14 8V DC IN 1 Press the LAMP or MONI key on the transceiver to display DC on the LCD The current voltage value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the MENU key to write the current voltage value into the EEPROM B Battery terminal reference voltage 7 5 V Battery terminal 1 Press the LAMP or MONI key on the transceiver to display BAT on t
62. 430MHz FM TRANSCEIVER TH K4AT K4E 2003 9 PRINTED IN JAPAN B51 8660 00 S 497 SERVICE MANUAL DISASSEMBLY FOR REPAIR 2 CIRCUIT DESCRIPTION 6 SEMICONDUCTOR DATA 14 COMPONENTS DESCRIPTION 15 PARTS LIST 17 EXPLODED VIEW 23 PACKING 25 ADJUSTMENT 27 TERMINAL FUNCTION 43 PC BOARD TX RX UNIT X57 675X XX A 3 44 TX RX UNIT X57 675X XX B 3 C 3 48 CONTENTS SCHEMATIC DIAGRAM 50 LEVEL DIAGRAM 55 BLOCK DIAGRAM 56 BC 21 WALL CHARGER 58 PB 43N Ni MH BATTERY PACK 58 BT 14 BATTERY CASE 59 PG 4Y PROGRAMMING INTERFACE CABLE 59 MCP 1A MEMORY CONTROL PROGRAM 59 SPECIFICATIONS BACK COVER Knob ENC K29 5159 03 Knob VOL K29 5150 03 Cabinet assy 16key A02 3822 23 H
63. 470PF K C124 CK73HF1C104Z CERAMIC C 0 1UF Z C125 CC73HCH1H1R5C CHIP C 1 5PF C C126 CC73HCH1H100D CHIP C 10PF D C128 CK73HB1C103K CHIP C 0 010UF K C129 CC73HCH1H110J CHIP C 11PF J C130 CK73HB1H471K CHIP C 470PF K C131 133 CK73HB1C103K CHIP C 0 010UF K C134 CK73HB1H471K CHIP C 470PF K C135 136 CC73HCH1H050C CHIP C 5 0PF C C137 CC73HCH1H070D CHIP C 7 0PF D C139 CK73HB1H471K CHIP C 470PF K C140 CC73HCH1H040B CHIP C 4 0PF B C141 142 CK73HB1H471K CHIP C 470PF K C144 CC73HCH1H180G CHIP C 18PF G C145 CC73HCH1H080B CHIP C 8 0PF B C146 CC73HCH1H040B CHIP C 4 0PF B C147 CK73HB1H471K CHIP C 470PF K C148 CC73HCH1H060B CHIP C 6 0PF B C152 153 CK73HB1H471K CHIP C 470PF K C156 CK73HB1H471K CHIP C 470PF K C157 CC73HCH1H180G CHIP C 18PF G C158 CC73HCH1H130G CHIP C 13PF G C159 CC73HCH1H030B CHIP C 3 0PF B C160 CC73HCH1H130G CHIP C 13PF G C161 CC73HCH1H030B CHIP C 3 0PF B C162 164 CK73HB1H471K CHIP C 470PF K C165 CC73HCH1H030B CHIP C 3 0PF B C166 CK73HB1C103K CHIP C 0 010UF K C167 168 CK73HB1A104K CHIP C 0 10UF K C169 170 CK73HB1A683K CHIP C 0 068UF K C171 CK73HB1H471K CHIP C 470PF K C172 CK73HB1H182K CHIP C 1800PF K C173 174 CC73HCH1H181J CHIP C 180PF J C175 CC73HCH1H220J CHIP C 22PF J C176 CK73HB1A104K CHIP C 0 10UF K C177 C92 0628 05 CHIP TAN 10UF 10WV C178 CK73HB1C103K CHIP C 0 010UF
64. 488 Q5 SEG27 SEG25 2SC5488 Q24 C330 470p TH3 100k R128 3 3k R38 27k R202 47k COM0 CPH3317 Q55 R130 100 C210 0 01u 2SC4617 R Q38 C225 1u D31 DA221 C354 470p TH4 100k F1 2 5A SEG3 D33 RB051L 40 R336 220 R145 4 7k C318 470p C227 2 2u4 C358 0 047u C37 470p C182 0 1u R328 470k R231 150 R205 100 R141 1k SEG9 D65 MA2S111 R188 47 IC4 XC6202PB52FR 1 2 4 GND 3 C359 0 1u SEG13 C221 0 01u R330 470 R118 27k SEG28 SEG24 C279 470p R255 0 L53 12n C338 1u 2SC4617 R Q30 C240 470p R17 3 3k C51 22p C285 470p C172 1800p IC12 TK11250CUCB 1 NP 2 GND 3 CONT 4 VIN 6 VOUT R227 100 SEG12 R193 1 8k SEG30 C270 470p R337 470 C183 0 1u R335 1k C169 0 068u CPH3417 Q56 R148 5 6k D60 SEG2 X3 7 982MHz R178 0 R282 0 R32 1k R120 2 7k R133 1k COM0 C312 0 039u D70 MA2S111 C21 470p L49 R162 270k 2SK1830 Q34 SEG14 SEG23 C6 470p D7 MA2S111 R243 330k SEG13 C195 10u10 C293 47p SEG14 C7 0 5p B R12 47 C291 470p R185 270k C193 4 7u6 3 C166 0 01u SEG29 D41 B30 2157 05 IC1 LMX2316TMX 1 2 3 4 5 6
65. 5 C226 C76 C77 C227 C228 229 Q29 C231 C83 Q30 C84 R271 Q33 E B C R273 C90 C2 C3 C4 C5 C6 C7 C8 C9 D1 D2 D3 D4 Q58 D S G D5 D6 D8 D9 C270 C276 C282 CN10 R100 R101 R103 R104 R107 R109 D18 D19 D27 L1 L2 L3 L4 L5 L6 D30 L8 L9 D32 D33 D35 R130 L10 L11 CD1 L13 L14 L15 L24 L25 L26 L27 R344 L28 L29 IC5 1 3 4 5 R346 R347 R348 R155 R156 CF1 L32 R10 L34 R11 L35 R12 L36 C124 R14 R160 R15 R161 R16 R162 R17 R163 R164 C129 C323 D73 C130 C324 C131 C132 C326 C133 C327 C134 Q1 G S D C135 C329 Q2 C136 Q3 D S G C137 R173 R174 C139 Q5 R175 R176 R177 L50 R178 Q9 R179 L54 C140 C141 L56 C142 C144 R180 C338 C145 R181 R182 C146 C147 R183 R4 C148 R39 R5 R6 R7 R8 R9 L65 R41 R42 C152 C153 R45 R46 C157 R47 R49 C352 C353 R50 R51 B R52 R53 C164 C358 R54 R55 R56 R59 C363 C364 R60 R62 R64 C369 C177 C178 C179 R88 R91 R92 R93 R94 R95 R96 R97 R98 R99 C10 C11 C13 C14 C15 C17 C18 C19 IC16 1 4 5 8
66. 5MHz Adjust SSG output 53dBm 501uV 3 Frequency 435 000MHz SSG Frequency 415 575MHz SSG output 53dBm 501uV 3 Squelch Switch to Adjustment mode SSG ANT S meter and carry out the operations Write for adjustment item C Refer to page 28 1 LCD display SQ1 MENU Write Note In the Frequency 435 050MHz Squelch adjust SSG 125dBm 0 126uV ments all 4 Squelch 2 LCD display SQ2 MENU Write adjusting points Frequency 435 050MHz including the S SSG 120dBm 0 22uV meter must be adjusted ADJUSTMENT Receiver section Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks TH K4AT K4E 37 ADJUSTMENT Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks Switch to Adjustment mode and carry out the operations for adjustment item D Refer to page 29 S meter 3 LCD display S1 SSG TX RX ANT MENU Write Frequency 435 050MHz A 3 SSG 120dBm 0 22uV 4 LCD display S9 MENU Write Frequency 435 050MHz SSG 105dBm 1 26uV 4 Squelch Squelch level 1 Check 1 Frequency 435 050MHz SSG Check Open Squelch SSG output 123dBm 0 158uV Oscilloscope SSG MOD 1kHz Distortion meter SSG DEV 3kHz 2 SSG OFF Close Squelch 5 S meter 1 Frequency 435 050MHz SSG Check Two segments Check SSG output 120dBm 0 22u
67. 7 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 36 COM0 1 COM1 COM2 Q56 G G G S S S D D D Q57 D7 C271 C272 F1 C279 F3 C280 C290 C291 XF1 TH1 TH2 TH3 J2 DC IN J3 MIC J4 SP D14 D15 D16 R115 R116 R117 R118 R119 D25 D26 R120 R122 R123 R124 R125 R126 R127 R128 D31 D34 R323 R324 CP34 R131 CP35 R132 R133 R134 R328 R135 R137 D40 R139 D41 R330 R332 R140 R335 C105 R141 C106 R142 C107 R143 C108 R144 C109 R145 R146 R147 C300 R148 C302 C304 C110 C305 C111 IC1 C306 C112 IC2 1 4 5 8 C307 C113 IC3 C308 C114 C309 C115 R151 C116 IC6 1 5 6 10 R152 C117 R153 C118 R154 IC9 1 3 4 6 R157 C310 R158 D60 C311 R159 D61 C312 D62 C313 D63 D64 R351 D65 C317 C318 1 5 2 6 GND KYO1 KIN4 BL KYO2 PTT R355 C319 C125 C126 R18 C128 C511 R19 R165 C512 R166 R167 R168 D70 D71 D69 D72 R20 R21 L45 L46 R24 R170 C328 R171 L49 Q4 Q6 D81 C331 R244 L53 R30 R31 R32 R33 L58 R34 R35 C339 R36 R
68. 70p D81 RB521S 30 C219 0 047u 2SK1830 Q27 R195 100 TH3 100k R202 47k C210 0 01u 2SC4617 R Q38 C225 1u D31 DA221 TH4 100k F1 2 5A D33 RB051L 40 R145 4 7k C227 2 2u4 C358 0 047u R205 100 R141 1k IC4 XC6202PB52FR 1 2 4 GND 3 C221 0 01u R330 470 C279 470p C338 1u 2SC4617 R Q30 C240 470p C285 470p R227 100 R193 1 8k C270 470p R335 1k CPH3417 Q56 R148 5 6k R178 0 L49 R162 270k 2SK1830 Q34 C195 10u10 C291 470p R185 270k C193 4 7u6 3 D41 B30 2157 05 R160 4 7k C282 470p C280 470p C201 1200p C222 0 01u C238 470p R208 10 R180 39k C236 0 01u R213 22k C235 0 01u C250 1u D34 MAZS0270H C252 100p C511 470p C206 0 018u C230 1u C353 470p R199 1k VR5 50k R176 820k R211 470k R137 4 7k R209 100k C237 10u10 R217 820 R190 47k C271 470p C198 1u 2SB1184 Q R Q37 C272 470p 2SB1184 Q R Q33 C196 0 027u R196 10k C253 10u10 C209 470p R192 470 R175 2 2k C283 470p R214 10k C368 470p L68 C200 0 01u R154 4 7k R143 27k VR6 50k TH2 100k R139 4 7k R146 4 7k R142 1k R165 820k C349 0 1u R158 330k
69. 73HB1J103J CHIP R 10K J 1 16W R201 RK73HB1J472J CHIP R 4 7K J 1 16W R202 RK73HB1J473J CHIP R 47K J 1 16W R203 RK73HB1J474J CHIP R 470K J 1 16W R204 RK73HB1J184J CHIP R 180K J 1 16W R205 RK73HB1J101J CHIP R 100 J 1 16W R206 RK73HB1J150J CHIP R 15 J 1 16W R207 RK73HB1J102J CHIP R 1 0K J 1 16W R208 RK73HB1J100J CHIP R 10 J 1 16W R209 RK73HB1J104J CHIP R 100K J 1 16W R210 RK73FB2A120J CHIP R 12 J 1 10W R211 RK73HB1J474J CHIP R 470K J 1 16W R212 RK73HB1J103J CHIP R 10K J 1 16W R213 RK73HB1J223J CHIP R 22K J 1 16W R214 RK73HB1J103J CHIP R 10K J 1 16W R215 RK73HB1J474J CHIP R 470K J 1 16W R216 RK73HB1J103J CHIP R 10K J 1 16W R217 RK73HB1J821J CHIP R 820 J 1 16W R218 R92 1368 05 CHIP R 0 OHM R223 RK73HB1J104J CHIP R 100K J 1 16W R226 RK73HB1J221J CHIP R 220 J 1 16W R227 RK73HB1J101J CHIP R 100 J 1 16W R230 RK73HB1J221J CHIP R 220 J 1 16W M2 R231 RK73HB1J151J CHIP R 150 J 1 16W R234 RK73HB1J183J CHIP R 18K J 1 16W R235 236 RK73HB1J102J CHIP R 1 0K J 1 16W R237 RK73HB1J104J CHIP R 100K J 1 16W R238 239 RK73HB1J102J CHIP R 1 0K J 1 16W R240 RK73HB1J104J CHIP R 100K J 1 16W R241 243 RK73HB1J334J CHIP R 330K J 1 16W R244 R92 1252 05 CHIP R 0 OHM J 1 16W R246 RK73HB1J392J CHIP R 3 9K J 1 16W R248 RK73HB1J392J CHIP R 3 9K J 1 16W R252 RK73HB1J104J CHIP R 100K J 1 16W R253 254 RK73HB1J102J CHIP R 1 0K J 1 16
70. 79V 4 98V 4 83V 4 95V ON 6 98V 7 12V 11 43V 13 8V 13 40V 4 63V T 0V R 4 90V 5 03V T 4 95V R 0V T 4 99V R 0V 0 72V 0 51V 4 77V W 115mV N 4 94V 4 42V 2 03V T 4 31V R 0V 1 43V T 4 86V R 0V 1 98V 10 37V 4 91V 10 56V T 0V R 0V 4 56V 2 80V 4 30V 4 56V 3 10V 3 14V 4 81V 2 30V HIGH POWER T 0V R 4 90V 2 02V Note The components marked with a dot are parts of layer1 TH K4AT K4E SCHEMATIC DIAGRAM TH K4AT K4E 55 BPF Q10 Q11 Q24 Q12 Q9 BPF Q16 Q17 0 28Vrms IC3 ANT 21 00dBm FILTER 14 00dBm 5 67dBm 36 33dBm ANT SP AF 1kHz FM IC 20 00dBm 53 00dBm 7 33dBm 8 23mVrms 0 83Vrms 26 33dBm 60 50dBm IC6 ANT 27 50dBm RF 435 05MHz 40 33dBm 50 AF 1kHz AMP 14 17dBm 0 58Vrms IF 38 85MHz 0 66Vrms 9 70Vrms MIC ANT 42 33dBm vco RF 435 05MHz MIC AMP 11 50dBm FILTER 41 17dBm vco IC16 4 00dBm LEVEL DIAGRAM All voltage levels must be measured at High power transmission The RF and IF sections are measured by using a spectrum analyzer After setting the standard 1 kHz 3 kHz Dev deviation each voltage of the AF section is measured by using an AF VTVM or osciloscope The level for each point is measured without removing parts or cutting the pattern All voltage levels must be measured after setting
71. A double side adhesive tape J99 0376 04 is used behind the PTT switch When reassembling the PTT PCB to the chassis press the PTT PCB under the PTT switch so that the tape hold the PCB and chassis securely Fig 3 CN6 Chassis PTT switch PTT PCB C 3 OK A bit clearance No clearance NG CN6 CN7 CN7 Chassis PTT PCB C 3 PTT switch Fig 4 Push three parts of the PTT PCB to contact tightly with the chassis 3 Tighten one screw in the PTT PCB DISASSEMBLY FOR REPAIR TH K4AT K4E 5 DISASSEMBLY FOR REPAIR 4 Packing G53 1572 02 TX BUSY lamp installation procedure 1 To assure waterproofing install the packing in the chassis groove as shown in Fig 5 z 2 Install the packing TX BUSY lamp section on the chassis x z x OK Packing NG Packing Chassis Chassis 5 Packing G53 1572 02 bottom installation procedure 1 Before installing the numeric key PCB TX RX unit B 3 on the chassis push three parts of the packing to contact tightly with the chassis as shown in Fig 6 If the packing is not in contact with the chassis there may be a gap between the transceiver bottom case assembly and the battery and water may enter through the gap Fig 5 OK NG Push three parts of the packing to contact tightly with the chassis Clearance NG Fig 6 6 Cautions for installing the chassis on the case assembly 1 Verify that the packing G53 1572 02 TX BUSY lamp secti
72. A or less 0 5W 0 05W 0 8A or less All segments are lighted Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting TH K4AT K4E 40 ANT ANT MIC LCD VR6 VR5 Check By tuning the VR6 adjust the modulation wave until if becomes the square wave 4 2kHz According to the larger Change the AG output level to obtain 3kHz deviation 4 to 6 seg ments are lighted 0 1kHz 4mV 12mV Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks 4 DCS modulation balance 5 MAX DEV 6 MIC sensitivity Check To exit from the Adjustment Mode turn the transceiver power OFF and then ON 2 Frequency 435 000MHz PTT ON Battery terminal voltage 6 4V Switch to Adjustment mode and carry out the operations for adjustment item L Refer to page 33 Detector P P HPF OFF LPF 3kHz De emphasis OFF TX power Low 1 LCD display DCS BAL Frequency 435 000MHz PTT ON To exit from the Adjustment Mode turn the transceiver power OFF and then ON MIC terminal input AG 1kHz 80mV Detector P P HPF OFF LPF 15kHz De emphasis OFF TX power Low 1 Frequency 435 000MHz PTT ON MIC terminal input AG 1kHz Detector P P 2 HPF OFF LPF 15kHz De emphasis OFF T
73. ATE VOLTAGE SW APC B KAPC APC KILL 1st MIXER RX 1st AMP 5R TEMP COMPENSATION KAPC KAPC 5R V U 5M QT DQT X57 675X XX 5R 5MV 5T APC DIFFERENTIAL AMP APC OUTPUT SW VGG APC CIRCUIT OPERATION SWITCH 5T 5T PTTE SPM RXD TXD 5T TEMP B 5MS LAMP BPF APC BPF APC BPF APC BPF APC BPF APC TH K4AT TH K4E R239 MOD ENCB 5MS TO VOLIN NAR ENCA 5MS MOD NAR VOLIN ENCB ENCA BUSY LED TX LED ROTARY ENCODER amp VOL KNOB GND ENCA GND ENCB VOLIN VOLOUT 1 VCC VIN RIPPLE D26 C246 DISCHARGE VOUT VSS VIN D33 35 36 REVERSE CURRENT PREVENTION Q38 Q37 OPERATION SW DCDET BTDET 8V BTEMP CHARGE AFAMP 5M B 8V BTDET DCDET 5M CHARGE B BTEMP AFAMP TXD IM RXD MIG SPM PTTE MICM RXD IM SPM PTTE MIG TXD IM MICM TXD SPM RXD MIG PTTE REM TONE VOXIN DTMF BEEP RXLED REM TONE VOXIN DTMF BEEP RXLED SIGIN VOLIN NAR ENCA MOD ENCB 5C TO 5MS 5R QT DQT 5T 5MV B 5C B 5MS ENCB NAR TO SIGIN MOD 5T 5R QT DQT ENCA VOLIN 5MV SEG14 SEG15 VSS C0R1 ENCA ENCB 5MS DVCC DVSS DTMF BEEP TONE AVCC AVRH AVRL AVSS REM SIGIN SQ SM VOXIN THERM BATT BTEMP
74. B1H471K CHIP C 470PF K C235 236 CK73HB1C103K CHIP C 0 010UF K C237 C92 0628 05 CHIP TAN 10UF 10WV C238 241 CK73HB1H471K CHIP C 470PF K C242 CK73HB1C103K CHIP C 0 010UF K C243 CK73HB1H471K CHIP C 470PF K C246 C92 1327 05 CHIP TAN 100UF 10WV TH K4AT K4E PARTS LIST 19 TX RX UNIT X57 675X XX Destination Ref No Parts No Description Address New parts Destination Ref No Parts No Description Address New parts E TH K4E M2 TH K4AT C247 248 CK73HB1A104K CHIP C 0 10UF K C249 CK73HB1H471K CHIP C 470PF K C250 CK73EF1C105Z CHIP C 1 0UF Z C252 CC73HCH1H101J CHIP C 100PF J C253 C92 0628 05 CHIP TAN 10UF 10WV C255 C92 0628 05 CHIP TAN 10UF 10WV C256 257 CK73HB1H102K CHIP C 1000PF K C258 CK73HB1A104K CHIP C 0 10UF K C270 272 CK73HB1H471K CHIP C 470PF K C276 CK73HB1H471K CHIP C 470PF K C279 285 CK73HB1H471K CHIP C 470PF K C286 CK73FB1C105K CHIP C 1 0UF K C290 291 CK73HB1H471K CHIP C 470PF K C293 CC73HCH1H470J CHIP C 47PF J C294 295 CC73HCH1H050C CHIP C 5 0PF C C297 CK73HB1A104K CHIP C 0 10UF K C298 CK73HB1H471K CHIP C 470PF K C299 CK73FB1C105K CHIP C 1 0UF K C300 CK73HB1H471K CHIP C 470PF K C302 CK73HB1H471K CHIP C 470PF K C303 C92 0605 05 TANTALUM C 150UF 6 3WV C304 306 CK73HB1H471K CHIP C 470PF K C307 CK73HB1A104K CHIP C 0 10UF K C308 CK73HB1H471K CHIP C 470PF K C309 CK73FB1C105K CHIP C 1
75. C I Not used VCC 87 MD2 I L fixed 88 MD1 I H fixed 89 MD0 I H fixed 90 RESET I Reset input L Reset 91 VSS GND 92 X0 I System clock 7 9872MHz 93 X1 O System clock 7 9872MHz 94 VCC Positive power supply 95 PWRSW I Power switch interrupt input 96 INTUP I Power supply voltage interrupt input 97 INTDW I Power supply voltage interrupt input SEMICONDUCTOR DATA TH K4AT K4E 15 98 DCDET I DC IN detection interrupt input L DC IN connected 99 RXLED O Busy LED output H ON 100 BSFT O Beat shift swiching output H ON 101 PLLEN O Serial enable output to PLL IC 102 PLLLD I Lock detection input from PLL IC H Lock 103 KIN0 I Key matrix input 0 104 KIN1 I Key matrix input 1 105 KIN2 I Key matrix input 2 106 KIN3 I Key matrix input 3 107 KIN4 I Key matrix input 4 108 TYPE I Market code bit input 109 VUKEY I Detection of VHF or UHF 4 key or 16 key 110 MICM O Microphone mute switch H Mute 111 NOAA I Not used 112 5R O RX power supply switch L ON 113 SHIFT O VCO shift switch L RX H TX 114 5T O TX power supply switch L ON 115 KOUT0 O Key matrix output 0 116 KOUT1 O Key matrix output 1 117 KOUT2 O Key matrix output 2 118 KOUT3 O Key matrix output 3 119 VSS GND 120 BTDET O Battery detection switch L ON SEMICONDUCTOR DATA COM
76. C156 C157 R47 R193 R194 C158 R49 R195 C159 R196 R197 R198 R199 C352 C353 R50 C160 R51 B C161 R52 C162 C357 R53 C163 C164 C358 R54 R55 C165 R56 R59 C361 C363 C364 R60 C365 R186 R61 C366 R62 C367 R64 C369 C177 C178 C179 C87 R88 CN1 R91 R92 R93 R94 R95 R96 R97 X3 R98 R99 C10 C11 C13 R200 C14 R201 C15 C17 C18 C19 IC12 1 4 6 3 IC16 1 4 5 8 1 120 30 31 60 61 90 91 LV J72 0884 19 A 3 46 47 TH K4AT K4E PC BOARD Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Foil side view J72 0884 19 A 3 TX RX UNIT X57 675X XX A 3 0 21 M2 2 71 E Foil side view J72 0884 19 A 3 PC BOARD TH K4AT K4E Ref No Address IC4 10E IC5 10K IC8 7E IC12 6B IC16 8L Q1 4P Q2 3O Q3 3P Ref No Address Q5 3N Q9 4N Q10 5N Q11 6M Q16 4L Q17 3J Q29 10J Q30 8J Ref No Address Q33 9N Q52 7G Q58 6K D1 4R D2 3R D3 3R D4 3R D5 2Q Ref No Address D6 3Q D8 4M D9 3M D10 3G D11 4G D12 3F D13 3G D18 2L Ref No Address D19 2L D20 3I D21 3H D22 10J D24 8I D27 9J D30 8N D32 8M Ref No Address D33 8N D35 7N D36 9D D73 7N D74 3F D79 11I D80 11I J I H G
77. CF1 passes through the IF amplifier in the FM IC again and is detected to produced an audio signal Squelch and Mute Circuit A noise component is obtained by passing FM detection output FM IC pin 9 through an operational amplifier in the CF1 450kHz CD1 AF OUT AFM SM SQ IC8 MPU 49 9 48 SMV SQV 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MIX Local OSC Buffer RSSI Quadrature detector LPF Noise AMP IF AMP Inverter AMP 1st IF input 38 85MHz IC3 FM IC 2nd local OSC 38 4MHz 5R Q21 AF FILTER Q20 AF MUTE SWITCH VOL IN R135 C173 C174 R125 R126 Noise comp Rectifier 5R SP AF OUT AF FILTER Q21 AF MUTE SWITCH Q20 IC6 AF AMP IC3 FM IC VR201 AF VOLUME DTMF BEEP REM IC8 MPU SPK AFO SPG REM TXD 40 46 9 J4 SP JACK Fig 3 IF Squelch Mute and S meter circuit Fig 4 AF amplifier FM IC and band pass filter consisting of R125 R126 R135 C173 C174 The noise component is rectified in the FM IC to produce a DC voltage which is output from the N REC terminal pin 14 of the FM IC as squelch voltage The squelch voltage enters the SQ terminal pin 48 of the MPU IC8 and is compared with the reference voltage preset in the MPU to control audio signal ON OFF When L is output from the AFM terminal pin 9 of the MPU the AF mute switch Q20 is activated to mute the audio s
78. D69 72 PTT BOARD REVERSE CURRENT PREVENTION BIT0 SPEED UP DC IN DETECTION KEY ILLUMINATION LED REVERSE CURRENT PREVENTION BTEMP PTTE ENCB TXD ENCA REM RXD D42 44 46 47 BIT3 5MS BIT1 BIT2 TYPE KEY W N 8 OHM MICM LAMP CHARGE PTT JUMPER MIC ALC RECTIFICATION MONI MIC MUTE CONTROL REVERSE CURRENT PREVENTION D79 80 MENU LIMITER SP MUTE SPEED UP 4 VOX DETECTION RECTIFICATION CALL 11 5V AVR 5C 5R 5T AVR 5MS 0 8V BATTERY TERMINAL TX RX UNIT X57 675X XX B 3 AF AMP LAMP AVR 8M VFO KIN4 DTMF BEEP 1750 5 MIG VOX DETECTION AMP F CALL REVERSE CURRENT PREVENTION LAMP 5MV 10KEY BOARD GND KYO0 1 F KIN2 MIC MUTE SW TRIPLER KYO1 6 KIN0 KYO2 SQV MIG 2 VFO D6 VOLOUT POWER SW VCO MODULATION IM KIN1 IM CTCSS DCS FILTER KYO3 MIC AMP 5R 5MV SW PTT 5R 3 3V VOLTAGE DETECTION MIC 5R 3 MR 5R 4 4V VOLTAGE DETECTION MIG DTMF 1750 SPM MAX DEV 5 0V AVR TXD IM MPU CONSTANT CURRENT CIRCUIT IM REM TXD AF AMP PTTE SPK HPF AFO RXD SMV VGG VDD ANT RF SW RF SW RF AMP 5R DRIVE AMP Q10 OPERATION SW 5T VOLTAGE DROP DRIVE AMP 5T OVER INPUT PROTECTION ANTENNA SW D12 13 ANTENNA SW ANTENNA SW 5T POWER AMP Q12 G
79. DCS deviation Lower limit frequency described on page 33 3DCS deviation Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display DVH on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 1DCS deviation Lower limit frequency described on page 33 O VOX sensitivity Level 1 level 9 1VOX sensitivity Level 1 1 Press the LAMP or MONI key on the transceiver to display VOX1 on the LCD Press the F key and then the PTT key repeatedly to turn the icon ON The current microphone input level value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Input a specified AG signal to microphone input 3 Press the MENU key to write the current microphone input level value into the EEPROM 2VOX sensitivity Level 9 1 Press the LAMP or MONI key on the transceiver to display VOX9 on the LCD 2 Input a specified AG signal to microphone input 3 Press the MENU key to write the current microphone input level value into the EEPROM TH K4AT K4E 35 ADJUSTMENT 1 Setting and Connect the optional PG 2W LCD total illumination display Initial configuration displayed after resettin
80. ENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU MENU MENU Write Write Write Write Write Write Write Write 0 8kHz 50Hz 0 8kHz 50Hz ADJUSTMENT TX RX A 3 TH K4AT K4E 42 Adjustment points TX RX unit A 3 Component side view J2 DC IN J3 MIC J4 SP VR1 VR5 VR6 LV B LCD ANT BTEMP GND SET TX RX UNIT A 3 Component side view 10 VOX Operation Check 11 DTMF DEV Check 12 1750Hz Tone DEV Check E type only 13 Protection Check DC IN terminal 13 8V To exit from the Adjustment Mode turn the transceiver power OFF and then ON 1 Frequency 435 000MHz VOX Gain 4 AG OFF 2 AG 1kHz 100mV Detector P P 2 HPF OFF LPF 15kHz De emphasis OFF TX power Low 1 Frequency 435 000MHz Send DTMF code D Detector P P 2 HPF OFF LPF 15kHz De emphasis OFF TX power Low 1 Frequency 435 000MHz Send 1750Hz Tone TX power High 1 Frequency 435 000MHz ANT OPEN PTT ON AG Linear detector Am meter Check Check Check Check Does not transmit Transmits 2 0kHz 4 2kHz 2 5kHz 4 5kHz 2 4A or less Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks MIC ANT TX RX A 3 ADJUSTMENT Note For details of sending DTMF code D refer to the Single Tone Mod
81. F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 MIC1 D42 D43 D44 D46 D47 S7 PTT MENU 1 F 2 VFO 3 MR F CALL VFO 6 5 4 7 8 9 MR CALL 0 LAMP MONI J72 0884 19 B 3 J72 0884 19 C 3 48 TH K4AT K4E PC BOARD Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 675X XX B C 3 0 21 M2 2 71 E Component side view J72 0884 19 B C 3 Ref No Address D42 4D D43 5D D44 8D D46 5G D47 8G A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J72 0884 19 B 3 J72 0884 19 C 3 R230 C243 Q50 D G 1 2 14 13 S D48 D49 R336 R337 C374 CN7 1 PTT KYO2 BL 5 2 KIN4 KYO1 GND 6 CN8 KIN3 KIN0 KIN2 GND MIG 8M IM KYO2 KYO1 KYO0 LAMP KIN4 KYO3 KIN1 49 PC BOARD TH K4AT K4E TX RX UNIT X57 675X XX B C 3 0 21 M2 2 71 E Foil side view J72 0884 19 B C 3 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 Ref No Address Q50 3I D48 11C D49 11B 50 TH K4AT K4E SCHEMATIC DIAGRAM A B C D E 1 2 3 4 5 6 7 X57 675 1 5 t t t 5MS 2SC4919 Q29 R194 10k C258 0 1u C290 470p C246 100u10 R140 10k IC16 NJM2904V 1 2 3 4 GND 5 6 7 8 V
82. LL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX M power Lower limit frequency described on page 32 K 13 8V TX L power Lower limit frequency center frequency upper limit frequency 113 8V TX L power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable transmit mode 6 Turn the encoder to change the current APC value and adjust transmission power 7 Press the MENU key to write the current APC value into the EEPROM 213 8V TX L power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P13C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX L power Lower limit frequency described on page
83. MALL FIXED INDUCTOR L35 L41 1585 14 SMALL FIXED INDUCTOR L36 L41 5678 14 SMALL FIXED INDUCTOR L38 L41 1278 14 SMALL FIXED INDUCTOR L40 L41 4763 14 SMALL FIXED INDUCTOR L41 L41 6868 14 SMALL FIXED INDUCTOR L45 46 L41 5685 14 SMALL FIXED INDUCTOR L49 L92 0131 05 FERRITE CHIP L50 L92 0137 05 FERRITE CHIP L53 L40 1275 71 SMALL FIXED INDUCTOR 12NH L54 L40 4768 71 SMALL FIXED INDUCTOR 4 7NH L56 L41 6868 14 SMALL FIXED INDUCTOR L58 L41 8285 14 SMALL FIXED INDUCTOR L63 L92 0140 05 FERRITE CHIP L64 L40 4795 85 SMALL FIXED INDUCTOR 4 7UH L65 L40 2775 71 SMALL FIXED INDUCTOR 27NH L67 L92 0161 05 BEADS CORE L68 L92 0163 05 BEADS CORE TH K4AT K4E PARTS LIST 20 TX RX UNIT X57 675X XX Destination Ref No Parts No Description Address New parts Destination Ref No Parts No Description Address New parts E TH K4E M2 TH K4AT X1 L77 1931 05 TCXO 12 8MHZ X3 L77 1940 05 CRYSTAL RESONATOR 7 982MHZ XF1 L71 0619 05 MCF 38 85MHZ CP1 RK75HA1J272J CHIP COM 2 7K J 1 16W CP2 RK75GB1J392J CHIP COM 3 9K J 1 16W CP31 RK75GB1J392J CHIP COM 3 9K J 1 16W CP32 35 RK75HA1J102J CHIP COM 1 0K J 1 16W R4 RK73HB1J102J CHIP R 1 0K J 1 16W R5 RK73HB1J104J CHIP R 100K J 1 16W R6 RK73HB1J102J CHIP R 1 0K J 1 16W R7 RK73HB1J473J CHIP R 47K J 1 16W R8 RK73HB1J104J CHIP R 100K J 1 16W R9 RK73HB1J151J CHIP R 150 J 1 16W
84. MV SQV FINAL TEMP PLLLD PLLEN SHIFT B 5C NAR VOLIN 5T QT DQT 5MS 5R TO MOD CLOCK DATA KAPC AFM SQV SMV TEMP FINAL DATA 5R CLOCK TO PLLLD 5C SHIFT AFM 5MS PLLEN MOD NAR QT DQT SMV SQV VOLIN VOLIN PLLLD CLOCK 5R PLLEN AFM 5C SQV SMV QT DQT NAR DATA BPF APC SQV SMV NAR AFM 5R BPF APC OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN FLO CPO GND1 GND2 FIN FIN VCC1 OSCI D16 PLL LOCK DETECTION KAPC TEMP FINAL FINAL TEMP FINAL TEMP B IN B IN BOUT V D14 REVERSE CURRENT PREVENTION APC OUTPUT VOLTAGE LIMITTER D15 1st IF 38 85MHz D18 19 RX BPF TUNING RX BPF TUNING D20 21 0 21 2 71 E M2 NO D44 B30 2205 05 NO B30 2205 05 D47 MA2S111 NO D60 MA2S111 D62 NO D63 MA2S111 NO R230 220 NO C374 NO 100p C512 100p NO 9 10 11 12 13 14 15 16 8 9 MR 7 1k C297 0 1u R244 0 WIDE NARROW CHANGEOVER SW CONT GND1 NP R172 10k R186 68k T 4 95V R 0V Reference voltage value are measured when the power supply voltage is 13 8V DC IN 1 51V 4 81V 4 95V T 3 29V R 110mV T 73mV R 3 39V T 0V R 4 62V ON 4 91V ON 4 92V 4 63V 3 76V T 4 95V R 0V 3 23V 7 14V 4 93V 13 57V 4 80V 4
85. O2 2SC5488 RF AMP SIGIN NAR X57 675 B 3 NAR 5MV 5R 5C SHIFT 5C Q47 RN1701 TX BUSY LED SW TX RX LED B30 2156 05 D40 41 B30 2157 05 5T RXLED 5C D24 MA742 VOX DET VOXIN 5T 5MV VR1 5MS VR5 VR6 TONE TONE KIN0 3 KYO0 3 VR6 VSS DVSS AVSS AVRL MICM DTMF BEEP X57 675 C 3 H L H L D A A D PWM X1 SW LIMITTER PTTE RXD 5M X57 675 A 3 IC1 PLL IC LMX2316TMX TH K4AT K4E 57 BLOCK DIAGRAM J4 Q24 XF1 Q16 Q2 Q5 Q4 D7 LIPPLE FILTER RF AMP RF AMP D8 D9 Q9 Q10 Q11 Q12 D10 11 LPF FINAL AMP ANT SW Q58 BIAS SW DRIVE AMP PRE DRIVE RF AMP TX RX SW Q17 D18 D19 D20 D21 IC3 CD1 CF1 TA31136FN FM IC IF AMP MCF RF AMP BPF BPF AF AMP IC6 Q20 AF MUTE SW Q21 AF FILTER LPF WIDE NARR SW Q22 Q15 SW B IC2 APC AMP NJM2904V Q14 RN4902 APC SW APC KILL SW 2SK1830 38 85MHz 3SK318 MIXER 3SK318 1SV305 1SV305 HVC131 2SK3476 2SK2596 2SC4926YD 2SC4617 R HSC277 2SC5488 2SC5488 2SC5488 2SC4617 2SK1830 TA7368F RN2105 SW Q13 2SK1830 5T 5T 38 4MHz DE EMPH BATT CHARGE Q33 2SB1184 Q R Q34 CHARGE SW 2SK1830 THERM DET Q36 2SJ347 T 2SC5488 CT DCS FILTER IC17 NJM2904V 5C 5R 5C 5R 5R 5R 5R BPF APC B 5R AFM AF AVR BPF APC
86. OM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 When the PTT key is pressed to enable transmit mode a preset tone frequency 151 4Hz is internally generated and modulated 6 Turn the encoder to change the current adjustment value and adjust tone deviation 7 Press the MENU key to write the current adjustment value into the EEPROM 2Tone deviation Center frequency 1 Press the LAMP or MONI key on the transceiver to display DVC on the LCD In this case the icon appears Press the F key and then the PTT key repeatedly to turn the icon ON 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 7 of 1Tone deviation Lower limit frequency described on page 33 3Tone deviation Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display DVH on the LCD In this case the icon appears Press the F key and then the PTT key repeatedly to turn the icon ON 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7
87. PONENTS DESCRIPTION Pin Pin I O Function No Name IC1 PLL IC IC2 APC differential amplifier IC3 FM IC IC4 11 5V AVR IC5 HPF Active filter IC6 AF amplifier IC8 MPU IC9 5 0V AVR IC10 4 4V voltage MPU INT voltage detection detection IC11 3 3V voltage MPU Reset voltage detection detection IC12 5 0V AVR IC15 EE PROM IC16 MIC amplifier Limiter splatter filter IC17 CTCSS DCS Active filter filter Q1 VCO Q2 RF amplifier Q3 VCO shift On TX control switch Q4 Ripple filter Q5 6 9 RF amplifier Q10 11 Drive amplifier Q12 Power amplifier Q13 APC circuit On TX operation switch Q14 APC output On TX switch Q15 Q10 operation On TX switch Q16 1st mixer Q17 RX 1st amplifier Q20 Audio mute Audio mute when off switch Q21 Audio filter Active filter Q22 Wide narrow On when wide is selected switching Q23 Tripler 2nd local Q24 IF amplifier 1st IF 38 85MHz Q27 Wide narrow On when wide is selected switching Q29 MIC mute Mutes when ON switch Q30 VOX detection amplifier Q31 Q56 operation Off when the speaker outputs audio switch Q33 Charge switch Ref No Use Function Operation Condition Compatibility TX RX UNIT X57 675X XX COMPONENTS DESCRIPTION TH K4AT K4E 16 D34 AVR constant voltage D35 Reverse current Battery prevention D36 Reverse current DC IN prevention D40 TX LED Lights on TX
88. Q58 VDD LPF D10 D11 ANT D12 D13 RX 5T B 1 AOUT IC2 APC AMP 2 A IN 3 A IN 4 8 7 6 5 GND V BOUT B IN B IN R72 R71 R70 Q14 B Q13 TH1 t Q55 7 KAPC 51 6 BPF APC THERM 16 FINAL IC8 MPU L19 Fig 7 APC and Temperature protection circuit The transmission reception switching circuit consists of D10 D11 L19 D12 and D13 These diodes are turned ON in transmit mode and OFF in receive mode to switch signals TH K4AT K4E 9 CIRCUIT DESCRIPTION The APC voltage controls the gate voltage of Q11 and Q12 and keeps transmission output stable The MPU detects power supply voltage and controls Q58 by transmission power supply voltage and transmission power For example if the power supply voltage during transmission is equal to or higher than approx 10 5 V and if power is at Mid or Low level the APC voltage level applied to Q12 is reduced by Q58 Temperature Protection Circuit To prevent thermal destruction of the power amplifier Q12 this circuit reduces APC voltage when Q12 temperature rises The MPU IC8 detects temperature with a thermistor TH1 and controls reference voltage to the APC circuit PLL System PLL Circuit A reference frequency of 5 kHz or 6 25 kHz is produced by dividing the 12 8 MHz reference frequency of the TCXO X1 with PLL IC IC1 Comparison frequency is produced by TCXO PLL IC IC
89. RB521S 30 D46 B30 2205 05 R256 1k MIC1 C191 0 01u R182 1k R179 220k D79 DA221 SEG6 SEG23 SEG18 C187 2p CP34 1k R127 47 CP31 3 9k L64 4 7u R272 4 7k R115 5 6k R161 1 8k 2SC5488 Q6 C305 470p C295 5p C228 0 1u R201 4 7k R204 180k R343 0 R218 0 SEG17 SEG17 C19 8p 2SC5488 Q2 C313 0 039u SEG1 C226 0 1u CN6 1 2 3 4 5 6 R285 0 D16 MA2S111 R164 47k R263 10k C170 0 068u C344 470p F3 0 5A C286 1u R117 2 7k D J4 SP D26 1SS388 SEG21 Q22 RN2105 C180 120p R198 10k IC8 90522BPFFG139 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 COM2 62 COM3 63 VSS 64 SEG16 65 SEG17 66 SEG18 67 SEG19 68 SEG20 69 SEG21 70 SEG22 71 SEG23 72 SEG24 73 NC 74 NC 75 SEG25 76 SEG26 77 SEG27 78 SEG28 79 SEG29 80 SEG30 81 SEG31 82 V0 83 V1 84 V2 85 V3 86 HST VCC 87 MD2 88 MD1 89 MD0 90 RESET 91 VSS 92 X0 93 X1 94 VCC 95 PWRSW 96 INTUP 97 INTDW 98 DCDET 99 RXLED 100 BSFT 101
90. STOR Q10 2SC4926YD TRANSISTOR Q11 2SK2596 FET Q12 2SK3476 FET Q13 2SK1830 FET Q14 RN4902 TRANSISTOR Q15 2SC4617 R TRANSISTOR Q16 17 3SK318 FET Q20 2SK1830 FET Q21 2SC4617 R TRANSISTOR Q22 RN2105 TRANSISTOR Q23 KTC4082 TRANSISTOR Q24 2SC5488 TRANSISTOR Q27 2SK1830 FET Q29 2SC4919 TRANSISTOR Q30 2SC4617 R TRANSISTOR Q31 2SK1830 FET Q33 2SB1184 Q R TRANSISTOR Q34 35 2SK1830 FET Q36 2SJ347 FET Q37 2SB1184 Q R TRANSISTOR Q38 2SC4617 R TRANSISTOR Q41 RN2105 TRANSISTOR Q47 RN1701 TRANSISTOR Q50 2SK1830 FET Q51 RN4902 TRANSISTOR Q52 RN1107 TRANSISTOR Q53 RN2701 TRANSISTOR Q55 CPH3317 FET Q56 CPH3417 FET Q57 RN2105 TRANSISTOR Q58 2SK1830 FET TH1 B57331V2103J THERMISTOR TH2 4 B57331V2104J THERMISTOR TH K4AT K4E 23 EXPLODED VIEW TH K4AT Parts with the exploded numbers larger than 700 are not supplied A B 1 2 3 2 7 C B 34 35 6 40 16 D D D 29 10 8 9 15 20 18 17 36 37 D TX RX Unit B 3 TX RX Unit C 3 TX RX Unit A 3 Dx2 D D E Ex2 D Dx2 D 23 33 39 28 14 22 Ax2 13 21 E E 5 4 12 701 STICKER Fx2 1 Gx2 A N09 1492 05 B N14 0569 04 C N14 0573 04 D N79 2035 46 E N79 2040 45 F N82 2007 46 G N09 2433 05 31 44 TH K4AT K4E 24 Parts with the ex
91. V in S meter light 2 SSG output 105dBm 1 26uV All segments in S meter light 6 Hum and 1 Frequency 435 050MHz SSG TX RX ANT noise ratio SSG output 53dBm 501uV Oscilloscope A 3 SP Check SSG MOD 1kHz Distortion meter SSG DEV 3kHz AF V M AF Output 0 63V 8 AF V M 0dB 2 SSG DEV OFF Check 38dB or less 7 AF distortion 1 Frequency 435 050MHz Check 5 or less Check SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 3kHz AF Output 0 63V 8 8 AF output 1 Frequency 435 050MHz Check 400mW or more Check SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 3kHz AF distortion 10 9 Current Squelch level 5 Drain 1 Frequency 435 050MHz SSG Check 80mA or less Check SSG output OFF Am meter 2 Frequency 435 050MHz 400mA or less SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 3kHz VOL knob Max TH K4AT K4E 38 ADJUSTMENT Transmitter section Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks 1 TX power Write Battery terminal 7 5V High power Mid power Low power Battery terminal voltage 7 5V Switch to Adjustment mode and carry out the operations for adjustment item F Refer to page 29 1 LCD display P7L Frequency 430 000MHz PTT ON 2 LCD display P7C Frequency 435 000MHz PTT ON 3 LCD display P7H Frequency 439 995MH
92. VER SW 1 51V 4 81V T 0V R 4 62V 4 63V 3 76V 4 63V 0 72V 0 51V 4 77V W 115mV N 4 94V 4 81V TX RX UNIT X57 675X XX A 3 X57 675 4 5 P Q R S T TH K4AT K4E SCHEMATIC DIAGRAM Y X W V U 1 2 3 4 5 6 7 t 5R D13 HVC131 R47 5 6k L65 27n 2SK2596 Q11 C78 470p C96 1p B CN10 L17 2 5n L21 4T R41 270 D73 MA2S111 2SK3476 Q12 D12 HVC131 C82 470p C364 18p L54 4 7n C363 10p C61 470p R56 10k L18 220n C369 470p C83 0 01u R64 0 C361 470p R46 10k R39 270 L19 4T C93 3p B 2SK1830 Q58 C324 470p C97 4p B C100 2p B C95 2p B 2SC4617 R Q15 R271 12 R33 22 D8 HSC277 L14 4 7n L20 4T R54 47 C75 470p C94 470p L30 C66 0 1u R55 4 7k C328 1u C67 470p R49 1k R62 270 C64 470p C72 0 1u C71 470p R53 1k R60 56k C329 12p C91 470p C99 5p B C323 470p L10 18n R45 3 3k L22 4T 4T R42 0 R347 150 R58 47 C88 20p G D10 HVC131 C70 1u C86 56p L23 1u L11 15n L16 L13 L56 6 8n R289 0 R51 470 C102 3p B R50 33 D9 HSC277 L15 4 7n C77 47p C89 33p R61 270 C357 1u D11 HVC131 C84 0 1u C327
93. W R255 R92 1368 05 CHIP R 0 OHM R256 RK73HB1J102J CHIP R 1 0K J 1 16W R263 RK73HB1J103J CHIP R 10K J 1 16W R271 RK73HB1J120J CHIP R 12 J 1 16W R272 RK73HB1J472J CHIP R 4 7K J 1 16W R273 RK73HB1J102J CHIP R 1 0K J 1 16W R275 277 RK73HB1J473J CHIP R 47K J 1 16W R282 283 R92 1368 05 CHIP R 0 OHM R285 286 R92 1368 05 CHIP R 0 OHM R289 R92 1368 05 CHIP R 0 OHM R310 RK73HB1J392J CHIP R 3 9K J 1 16W R312 RK73HB1J472J CHIP R 4 7K J 1 16W R313 RK73HB1J332J CHIP R 3 3K J 1 16W R318 RK73HB1J102J CHIP R 1 0K J 1 16W R323 RK73HB1J472J CHIP R 4 7K J 1 16W R324 325 RK73HB1J473J CHIP R 47K J 1 16W R326 R92 1368 05 CHIP R 0 OHM R328 RK73HB1J474J CHIP R 470K J 1 16W R330 RK73HB1J471J CHIP R 470 J 1 16W R332 RK73FB2A150J CHIP R 15 J 1 10W R335 RK73HB1J102J CHIP R 1 0K J 1 16W R336 RK73HB1J221J CHIP R 220 J 1 16W R337 RK73HB1J471J CHIP R 470 J 1 16W R342 343 R92 1252 05 CHIP R 0 OHM J 1 16W R344 RK73HB1J470J CHIP R 47 J 1 16W R346 RK73HB1J101J CHIP R 100 J 1 16W R347 RK73HB1J151J CHIP R 150 J 1 16W R348 RK73HB1J680J CHIP R 68 J 1 16W R351 RK73HB1J221J CHIP R 220 J 1 16W R352 353 R92 1368 05 CHIP R 0 OHM R354 RK73HB1J333J CHIP R 33K J 1 16W R355 R92 1368 05 CHIP R 0 OHM VR1 R32 0658 05 SEMI FIXED VARIABLE RESISTOR 100K VR5 6 R32 0668 05 SEMI FIXED VARIABLE RESISTOR 50K S7 S70 0485 05 TACT SWITCH PTT MIC1 T91
94. X power Low 1 Frequency 435 000MHz PTT ON DC power supply DVM Linear detector Oscilloscope Linear detector AG Oscilloscope TX RX A 3 ADJUSTMENT Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 6 4V while the transceiver is transmitting TH K4AT K4E 41 Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks 7 Tone deviation 8 DCS deviation 9 VOX Sensitivity Write Switch to Adjustment mode and carry out the operations for adjustment item M Refer to page 33 Detector P P 2 HPF OFF LPF 3kHz De emphasis OFF TX power Low 1 LCD display DVL Frequency 430 000MHz PTT ON 2 LCD display DVC Frequency 435 000MHz PTT ON 3 LCD display DVH Frequency 439 990MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item N Refer to page 33 Detector P HOLD HPF OFF LPF 3kHz De emphasis OFF TX power Low 1 LCD display DVL Frequency 430 000MHz PTT ON 2 LCD display DVC Frequency 435 000MHz PTT ON 3 LCD display DVH Frequency 439 990MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item O Refer to page 34 TX power Low 1 LCD display VOX1 Frequency 435 000MHz AG 1kHz 80mV 2 LCD display VOX9 Frequency 435 000MHz AG 1kHz 1 5mV Linear detector AG ANT MIC Encoder M
95. are measured when the power supply voltage is 13 8V DC IN 2 03V T 4 31V R 0V 1 43V T 4 86V R 0V 1 98V 10 37V 4 91V 10 56V T 0V R 0V 4 56V 2 80V 4 30V 4 56V 3 10V 3 14V 2 30V HIGH POWER Note The components marked with a dot are parts of layer1 X57 675 5 5 TX RX UNIT X57 675X XX A 3 t t t t 5R 5MS R126 27k 2SC4919 Q29 R194 10k C258 0 1u C290 470p SEG31 C246 100u10 R140 10k R252 100k IC16 NJM2904V 1 2 3 4 GND 5 6 7 8 V R155 100k C367 470p Q51 RN4902 SEG5 C308 470p R313 3 3k R238 1k C26 470p CP2 3 9k R312 4 7k C346 470p R206 15 IC10 S 80844CNNBB85 1 OUT 2 VDD 4 VSS 3 NC COM3 R275 47k C17 470p CP33 1k D5 HSC277 D80 DA221 C310 1u R235 1k D40 B30 2156 05 COM2 SEG3 L58 820n C302 470p C54 470p SEG26 SEG4 C24 470p R183 33k C52 10p C167 0 1u R273 1k R323 4 7k CN7 1 2 3 4 5 6 R174 560k CP32 1k R200 10k Q53 RN2701 R318 1k C207 0 022u 2SK1830 Q35 C352 470p R151 1 2k C202 270p COM3 C311 0 1u 2SC4617 R Q4 C257 1000p R191 47k D25 MA2S111 D43 B30 2205 05 R212 10k R342 0 R215 470k C255 10u10 SEG5 D30
96. ble to the power supply DC IN terminal voltage 13 8V Switch to Adjustment mode and carry out the operations for adjustment item I Refer to page 31 1 LCD display P13L Frequency 430 000MHz PTT ON 2 LCD display P13C Frequency 435 000MHz PTT ON 3 LCD display P13H Frequency 439 995MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item J Refer to page 32 4 LCD display P13L Frequency 430 000MHz PTT ON 5 LCD display P13C Frequency 435 000MHz PTT ON 6 LCD display P13H Frequency 439 995MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item K Refer to page 32 7 LCD display P13L Frequency 430 000MHz PTT ON 8 LCD display P13C Frequency 435 000MHz PTT ON 9 LCD display P13H Frequency 439 995MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item B Refer to page 28 TX power Low 1 LCD display BAT Frequency 435 000MHz PTT ON Battery terminal voltage 7 5V DC power supply DVM Power meter Am meter DC power supply DVM TX RX A 3 DC IN ANT Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU MENU LCD Write Write Write Write Write Write Write Write Write Write Check 5 0W 5 1W 2 0A or less 1 5W 0 05W 1 4
97. components The first IF signal passing through the MCF XF1 is amplified by an IF amplifier Q24 and the resulting signal enters the FM IC IC3 Fig 2 Receiver section configuration Item Rating Nominal center frequency fo 38 85MHz Pass bandwidth 6 0kHz or more at 3dB Attenuation bandwidth 25kHz or less at 35dB Ultimate attenuation 70dB or more fo 910 kHz Spurious response 40dB or more fo 1MHz Ripple 1dB or less Insertion loss 4dB or less Terminating impedance 610 5 3pF 0 5pF Table 2 MCF L71 0619 05 characteristics TX RX unit XF1 Item Rating Nominal center frequency fo 450kHz 3dB bandwidth 6 5kHz or more 50dB bandwidth 15 5kHz or less Ripple 2dB or less fo 6 5kHz Guaranteed attenuation 55dB or more fo 18kHz to 33kHz 50dB or more fo 100kHz Insertion loss 4dB or less I O matching impedance 1 5k Table 3 Ceramic filter L72 0968 05 characteristics TX RX unit CF1 TH K4AT K4E 7 CIRCUIT DESCRIPTION IF Circuit The first IF signal 38 85 MHz amplified by the IF amplifier Q24 and the second IF signal 38 4 MHz generated by tripling the 12 8 MHz reference oscillator frequency of the TCXO X1 by Q23 are mixed in the FM IC to produce a second IF signal 450 kHz Lower heterodyne The second IF signal passes through a ceramic filter CF1 to remove unwanted components The second IF signal passing through the ceramic filter
98. current APC value into the EEPROM 27 5V TX M power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P7C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 8 of 17 5V TX M power Lower limit frequency described on page 30 37 5VTX M power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7H on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display upper limit frequency on the LCD 4 Repeat steps 4 to 8 of 17 5V TX M power Lower limit frequency described on page 30 H 7 5V TX L power Lower limit frequency center frequency upper limit frequency 17 5V TX L power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display ADJUSTMENT TH K4AT K4E 31 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 P
99. e icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Turn the encoder to change the current APC value and adjust the transmission power 7 Press the MENU key to write the current APC value into the EEPROM 213 8V TX H power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P13C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display center frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX H power Lower limit frequency described on page 31 313 8V TX H power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13H on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX H power Lower limit frequency described on page 31 ADJUSTMENT TH K4AT K4E 32
100. e on page 27 VR1 TX frequency VR5 MAX DEV VR6 DCS modulation valance LV VCO lock voltage terminal TH K4AT K4E 43 TERMINAL FUNCTION CN1 1 GND GND 2 Vol OUT RX audio volume output 3 Vol IN RX audio volume input 4 EN2 Encoder 2 5 GND GND 6 EN1 Encoder 1 CN2 1 SPK Internal speaker audio 2 SPG Audio ground CN6 1 PTT PTT CN7 2 KIN4 Key matrix input 3 KYO2 Key matrix output MONI key 4 KYO1 Key matrix output LAMP key 5 BL LCD backlight control 6 GND GND CN8 1 KIN1 Key matrix input CN9 2 IM Internal microphone 3 KYO3 Key matrix output 4 8M 8V power supply 5 KIN4 Key matrix input 6 MIG Microphone ground 7 LAMP Key illumination control 8 GND GND 9 KYO0 Key matrix output 10 KIN2 Key matrix input 11 KYO1 Key matrix output 12 KIN0 Key matrix input 13 KYO2 Key matrix output 14 KIN3 Key matrix input CN No Pin No Pin Name Function TX RX UNIT A 3 TX RX VOL ENC TX RX UNIT A 3 TX RX Internal speaker TX RX UNIT A 3 TX RX TX RX UNIT B 3 10KEY TX RX UNIT A 3 TX RX TX RX UNIT C 3 PTT J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C20 C21 C22 R210 C24 R211 C25 R212 C26 R213 C27 R214 R215 C29 1 1 3 4 6 13 KYO2 KYO1 KYO0 LAMP KIN4 KYO3 KIN1 KIN3 KIN0 KIN2 GND MIG 8M IM 14 2 R216 R218
101. elical Antenna T90 1019 25 Key top 16key K29 9272 02 Front glass B10 2746 03 Knob PTT LAMP MON K29 9274 03 Knob ENC K29 5159 03 Knob VOL K29 5150 03 Cabinet assy 4key A02 3823 23 Helical Antenna T90 1019 25 Key top 4key K29 9276 02 Front glass B10 2746 03 Knob PTT LAMP MON K29 9274 03 TH K4AT TH K4E Cap SP MIC DC IN B09 0675 03 Cap SP MIC DC IN B09 0675 03 TH K4AT K4E 2 DISASSEMBLY FOR REPAIR How to remove the case assembly from the chassis 1 Remove two screws z holding the chassis 2 Pull out two knobs x and remove two round nuts c 3 Pull out the SP and MIC parts of the cap from jacks v 4 Turn the unit over with the bottom of the chassis facing upwards and remove the chassis n from the case assembly b 5 Remove the speaker lead m from the connector CN2 of the TX RX PC board TX RX unit A 3 How to remove the PC board Numeric key PC board TX RX unit B 3 1 Remove three screws on the numeric key PC board 2 Lift the numeric key PC board and remove it from the connector CN9 of the TX RX PC board PTT PC board TX RX unit C 3 3 Remove one screw on the PTT PC board 4 Pull the PTT PC board to the left and remove it from the connector CN6 of the TX RX PC board TX RX unit A 3 TX RX PC board TX RX unit A 3 5 Remove the SP MIC jack cover 6 Remove two screws holding
102. g DC cable to the power supply the full reset DC IN terminal voltage 13 8V 1 Total illumination display confirmation Turn the Transceiver Power ON by pressing the power switch while the F key is pressed While the F key is pressed all LCD segments light 2 Full resetting After confirming that all LCD segments have lighted described in the Step 1 above release the F key and then press the F key twice while FL RST appears on the display 2 VCO After removing 3 screws fixing Lock voltage the TX RX unit B 3 remove Check the TX RX B 3 unit from the CN9 connector of the TX RX unit A 3 1 Frequency 400 000MHz DVM TX RX LV Check 0 7V or more RX 2 Frequency 469 990MHz A 3 4 3V or less TX TX power Low 1 Frequency 400 000MHz 0 7V or more PTT ON 2 Frequency 469 990MHz 4 3V or less PTT ON After observing the VCO lock voltage connect the TX RX unit B 3 to the original position 3 TX frequency 1 TX power Low f counter ANT TX RX VR1 439 990MHz 400Hz Adjust Frequency 439 990MHz A 3 PTT ON 4 Overvoltage Switch to Adjustment mode warning and carry out the operations reference for adjustment item A voltage Refer to page 28 Adjust Check 1 LCD display DC DC power supply MENU Write Frequency 435 050MHz DC IN terminal voltage 14 8V To exit from the Adjustment Mode turn the transceiver power OFF and then ON 2 Frequency 435 050MHz Check
103. he LCD Press the F key and then the PTT key repeatedly to turn the icon ON The current voltage value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the PTT key to enable the transmit mode 3 Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting 4 Press the MENU key to write the current voltage value into the EEPROM C Squelch SQL1 SQL2 1Squelch SQL1 1 Press the LAMP or MONI key on the transceiver to display SQ1 on the LCD The detected DC voltage value to the current noise level is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the MENU key to write the current noise level value into the EEPROM 2Squelch SQL2 1 Press the LAMP or MONI key on the transceiver to display SQ2 on the LCD 2 Press the MENU key to write the current noise level value into the EEPROM Key name PTT LAMP MONI MENU F VFO MR CALL Encoder ADJUSTMENT key Transmit while this key is held down Changes adjustment items Forward When this key is pressed on the frequency display it switches to the adjustment display Changes adjustment items Back When this key is pressed on
104. he signal is converted into the DC Voltage D24 rectifies The DC voltage activates the MPU IC8 and the VOX starts Fig 15 CTCSS DCS and DTMF VOX Serial Control Serial control must be enabled from a transceiver menu so that the REM TXD pin of the speaker jack J4 and the PTT RXD pin of the microphone jack J3 function as TXD and RXD respectively when communicating with a personal computer SP POUT 10 HPF IC5 IC6 AF AMP PTTE TXD RXD REM IC8 MPU SPK AFO SPG REM TXD 13 46 J4 SP JACK IM 5MS PTT MIC J3 MIC JACK 5MC 12 11 MIC Fig 16 Serial control CIRCUIT DESCRIPTION TH K4AT K4E 14 MPU 90522BPFFG139 IC8 Pin function 1 CLOCK O Common serial clock output 2 DATA O Common serial data output 3 EEPDI I Data input from EEPROM 4 EEPCS O Chip select output to EEPROM 5 VOX O VOX power supply switch L ON 6 BPF APC O BPF tuning voltage output APC voltage output PWM 7 KAPC O APC ON OFF switch L APC ON 8 VCC Positive power supply 9 AFM O AF mute switch L Mute 10 SPM O Speaker mute switch H Mute 11 RXD I UART data input line from PC 9600bps 12 TXD O UART data output line to PC 9600bps 13 PTTE I External PTT key input L ON 14 PTTI I PTT key input L ON 15 5C SAVE O Save power supply switch L ON 16 FINAL O Gate bias control of TX final amplifier
105. ignal S Meter Circuit The S meter voltage is output from the RSSI terminal pin 12 of the FM IC IC3 and input to the SM terminal pin 49 of the MPU Then the voltage is converted from analog to digital in the MPU to control the S meter display on the LCD AF Amplifier The detected audio signal passes through an AF filter Q21 and enters an AF mute switch Q20 After passing through the AF mute switch Q20 the signal passes through an AF volume VR201 and is amplified to a specified output level with an AF amplifier IC6 The audio signal amplified with the AF amplifier IC6 is output through an internal speaker or an external speaker jack J4 The beep tone and the DTMF signal are output from the DTMF BEEP terminal pin 40 of the MPU IC8 enters the AF amplifier IC6 and is output as a monitor tone TH K4AT K4E 8 CIRCUIT DESCRIPTION Transmitter System Microphone Amplifier Circuit The audio signal from the microphone passes through a high pass filter IC5 and enters a microphone amplifier IC16 The signal passes through a pre emphasis circuit limiter amplifier and splatter filter inside the microphone amplifier The splatter filter will remove distortion outside the audio band Modulation Circuit The audio signal amplified by the microphone amplifier IC16 passes through a semi fixed volume VR5 for modulation adjustment and goes to the VCO modulation varicap D6 for variable reactance phase
106. is unlocked the waveform of the pulse output from the Fo LD terminal pin 14 of the PLL IC IC1 is rectified with R32 D16 R35 and C40 and the Fo LD terminal is made L level The voltage at the Fo LD terminal is detected by the MPU to control transmission reception switching timing TH K4AT K4E 10 Power Supply Circuit Charging Circuit When an external power supply is connected to the DC IN terminal the constant current circuit consisting of Q33 and D31 provides a constant current of approx 110 mA to the Ni MH battery If no external power supply is connected to the DC IN terminal the constant current circuit does not function Power Supply Switching Circuit The voltage supplied through the battery terminal or DC IN terminal is branched in the power supply switching circuit as shown in Fig 10 and then supplied to the required components Battery Type Recognition Circuit When the battery pack is attached to the transceiver the battery type is recognized with the T terminal on the transceiver This battery type recognition activates charging for the Ni MH battery pack and displaying the battery meter T B J2 RN2701 XC6202PB 52FR Q41 D32 D81 5T SW Q37 Q38 2SK1830 5M CHARGE SW RB051L 40 IC6 D48 49 D42 43 46 D47 44 BATT CHARGE 5R SW TK11250 CUCB 5 0V TK11250 CM AVR 5C SW PROTECT CPH3317 2SJ347 Q35 CHARGE BTDET Q34 Q57 D
107. k IC17 NJM2904V 1 2 3 4 GND 5 6 7 8 V C339 0 047u C204 0 033u R324 47k C331 470p C211 2200p C203 120p R168 180k C212 0 012u R159 120k R166 820k R167 180k C351 0 01u C213 4 7u6 3 R171 39k D R170 56k D R157 330k C9 5p B C177 10u10 C178 0 01u C179 0 1u C374 C510 0 047u D6 1SV278 L27 680n R223 100k R234 18k R353 0 R354 33k R241 330k R240 100k C299 1u C298 470p NI MH TEMPERATURE DETECTION IF AMP SQ FILTER D1 4 RF AMP 5R VCO FREQUENCY CONTROL KIN3 SMV RF AMP GND FREQUENCY SHIFT SQV BL RIPPLE FILTER KYO1 VCO SHIFT CONTROL SW Q37 RF AMP KYO2 AF MUTE SW VCO KIN4 PTT RESET TX BUSY LED SW INT0 KEY LED SW SET LCD LED SW SHIFT VOLIN B VOLOUT B D81 BEAT SHIFT SW Q36 5T SW Q33 OPERATION SW AVR CONSTANT VOLTAGE 5C SW 5MS SW 5T 5C 5R 5T AVR 5C 5R 5T AVR SP 5C 5R 5T AVR 5T T0 B SPG DCS BAL SP MUTE SW EEPROM REM DC IN CHARGE SW 2nd L O PLLEN DATA CLOCK PLLLD Q31 450kHz Q56 OPERATION SW WIDE NARROW CHANGEOVER SW AF FILTER 5 0V AVR TX RX UNIT X57 675X XX C 3 FM IC TX RX UNIT X57 675X XX A 3 SPK MARKET CODE DETECTION SPG D62 65 PLL IC FREQ
108. nce voltage prevention D15 APC output voltage limiter D16 PLL lock detection D18 21 RX BPF tuning D22 MIC mute control D24 VOX detection rectification D25 Speaker mute speed up D26 C246 discharge D27 MIC ALC rectification D30 Reverse current Charge current prevention D31 Constant current Constant current charge circuit D32 Reverse current DC IN prevention D33 Reverse current Battery prevention TH K4AT K4E 17 New Parts indicates safety critical components Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert L Scandinavia K USA P Canada Y PX Far East Hawaii T England E Europe Y AAFES Europe X Australia M Other Areas Parts No Description Address New parts Destination Destination TH K4AT K4E Ref No Parts No Description Address New parts TH K4AT K4E Y50 581X XX TX RX UNIT X57 675X XX Ref No PARTS LIST E TH K4E M2 TH K4AT F 3A 3C N82 2007 46 PAN HEAD TAPTITE SCREW CASE G 2A 2C N09 2433 05 PAN HEAD TAPTITE SCREW FINAL FET 39 2B 2D R39 0602 05 VARIABLE RESISTOR 40 1A 1C T07 0341 15 SPEAKER 41 2F 3G T90 1019 25 HELICAL ANTENNA ACCESSORY 42 2F W08 0959 05 CHARGER 230V 13 8V ACCESSORY E 43 2E W09 0991 05 BATTERY ASSY 7 2V 1100MAH ACCESSORY E D40 B30 2156 05 LED RED D41 B30
109. on is has been past through the hole in the illumination guide section on the top of the case assembly Fig 7 LAMP LOW PTT Fig 7 2 Align the speaker lead as shown fig 8 Do not place the leads over the key top section LCD section or SP MIC DC IN cap section Do not fix this part of the key top to the rib of the case assembly 7 Cautions for installing the key top on the case assembly 1 Install the key top keypad section and the power switch section on the rib of the case assembly 2 Do not fix the part between the key top keypad section and the power switch section to the rib of the case assembly but install it as shown in Fig 8 The packing TX BUSY lamp section is has been past through the hole in the illumination guide section on the top of the case assembly Fig 8 TH K4AT K4E 6 CIRCUIT DESCRIPTION Frequency Configuration The frequency configuration is shown in Figure 1 and Table 1 Fig 1 Frequency configuration 361 150 431 145MHz M2 391 150 401 145MHz E 400 000 469 995MHz M2 430 000 439 995MHz E 400 000 469 995MHz M2 430 000 439 995MHz E TX RX ANT SW MCF 38 85MHz 38 4MHz 12 8MHz 450kHz CF MIX IF DET AF AMP SP PRE DRIVE FINAL TCXO DRIVE Tripler x 3 RF AMP 1st MIX PLL VCO MIC AMP MIC ANT Receiver System Front End The received signal from the antenna passes through a low pass filter and then through a transmissi
110. on reception switching circuit antenna switch and enters the band pass filter L40 L41 L38 The signal passing through the band pass filter L40 L41 L38 is amplified by with an RF amplifier Q17 passes through a band pass filter L32 L34 and enters the first mixer Q16 These band pass filters are tuned to a desired frequency by varicaps D21 D20 D19 D18 A tuning voltage corresponding to the desired signal is applied to each varicap through the BPF APC terminal pin 6 of the MPU IC8 to tune to the receive frequency Double super heterodyne Reception method 1st IF Frequency 38 85MHz Lower 2nd IF Frequency 450kHz Lower Transmission method VCO direct oscillation amplification Modulation Variable reactance phase modulation Table 1 Basic configuration ANT SW SP LPF VCO BPF APC MPU IC8 PLL IF AMP DET Tripler x 3 TCXO BPF L41 L40 L38 BPF L32 L34 MIXER Q16 1st Local OSC PLL RF AMP Q17 ANT MCF XF1 IF AMP Q24 FM IC IC3 Q23 2nd Local OSC X1 AF AMP IC6 5R 5R D20 D21 LV 6 Tuning voltage D18 D19 38 85MHz 12 8MHz First Mixer The received signal passing through the band pass filter L32 L34 is mixed with the first local signal generated by the VCO by the first mixer Q16 to produce a first IF signal 38 85 MHz Lower heterodyne The first IF signal passes through a MCF Monolithic crystal filter XF1 to remove unwanted
111. play the upper frequency on the LCD 4 Repeat steps 4 to 6 of 1RX BPF Lower limit frequency described on page 29 F 7 5V TX H power Lower limit frequency center frequency upper limit frequency 17 5V TX H power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting 7 Turn the encoder to change the current APC value and adjust the transmission power ADJUSTMENT TH K4AT K4E 30 8 Press the MENU key to write the current APC value into the EEPROM 27 5V TX H power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P7C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repea
112. ploded numbers larger than 700 are not supplied EXPLODED VIEW TH K4E C D 1 2 3 3 7 C B 34 35 6 40 16 D D D 29 10 8 9 15 20 18 19 38 37 D TX RX Unit B 3 TX RX Unit C 3 TX RX Unit A 3 D D D 23 33 39 28 14 22 13 21 E E 5 4 12 A N09 1492 05 B N14 0569 04 C N14 0573 04 D N79 2035 46 E N79 2040 45 F N82 2007 46 G N09 2433 05 31 Dx2 E Ex2 D Dx2 Ax2 701 STICKER Fx2 Gx2 44 TH K4AT K4E 25 E F 1 2 3 703 PAMPHLET 11 INSTRUCTION MANUAL B62 1696 00 B62 1697 00 B62 1699 00 B62 1702 00 B62 1757 00 B62 1758 00 41 HELICAL ANTENNA T90 1019 25 42 CHARGER 230V 13 8V W08 0959 05 30 BELT HOOK ASSY J29 0709 04 32 HANDSTRAP J69 0342 05 24 ITEM CARTON CASE H52 1964 02 705 UK PLUG ATTACHMENT 26 PACKING FIXTURE H12 3146 01 704 WARRANTY CARD PACKING TH K4E Parts with the exploded numbers larger than 700 are not supplied 702 PAMPHLET R amp TTE 43 BATTERY ASSY 7 2V 1100mAh W09 0991 05 TH K4AT K4E 26 PACKING TH K4AT Parts with the exploded numbers larger than 700 are not supplied G H 1 2 3 11 INSTRUCTION MANUAL B62 1695 00 B62 1696 00 703 PAMPHLET 25 ITEM CARTON CASE H52 1965 12 41 HELICAL ANTENNA T90 1019 25 32 HANDSTRAP J69 0342 05 27 PACKING FIXTURE H
113. requency stability Within 5 ppm 20 C 60 C Dimensions W x H x D Projections not included 58 x 110 x 28 4 mm 2 7 16 x 4 6 16 x 1 2 16 with PB 43N 58 x 110 x 29 6 mm 2 7 16 x 4 6 16 x 1 5 32 with BT 14 weight Approx 320 g 11 3 oz with PB 43N Approx 320 g 11 3 oz with BT 14 Transmitter Transmission Mode F3E FM F2D FM Frequency range 400 470 MHz 430 440 MHz Output Power DC IN jack 13 8 V H 5 0 W approx M 1 5 W approx L 0 5 W approx PB 43N 7 2 V H 5 0 W approx M 1 5 W approx L 0 5 W approx BT 14 9 0 V H 3 5 W approx M 1 2 W approx L 0 3 W approx Modulation Reactance Maximum frequency deviation 5 kHz FM 2 5 kHz NFM Squrious emissions 60 dB or less H and M power 50 dB or less L power Microphone impedance 2 k Receiver Reception Mode F3E FM F2D FM Frequency range 400 470 MHz 430 440 MHz Intermediate Frequency IF 1st IF 38 85 MHz 2nd IF 450kHz Circuit type Double super heterodyne Sensitivity FM 12 dB SINAD 70 cm amateur radio band 0 18 V or less Squelch Sensitivity 0 13 V or less within 70 cm amateur radio band Selectivity 6 dB 10 kHz or less 40 dB 28 kHz or less within 70 cm amateur radio band Audio output 10 distortion 400 mW or higher 7 2 V 8 load
114. ress the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting 7 Turn the encoder to change the current APC value and adjust the transmission power 8 Press the MENU key to write the current APC value into the EEPROM 27 5V TX L power Center frequency 1 Press the LAMP or MONI key on the transceiver to display P7C on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 8 of 17 5V TX L power Lower limit frequency described on page 30 37 5V TX L power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7H on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 8 of 17 5V TX L power Lower limit frequency described on page 30 I 13 8V TX H power Lower limit frequency center frequency upper limit frequency 113 8V TX H power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13L on the LCD In this case th
115. ress the LAMP or MONI key on the transceiver to display S9 on the LCD 2 Press the MENU key to write the current RSSI level value into the EEPROM E RX BPF Lower limit frequency center frequency upper limit frequency 1RX BPF Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display BPL on the LCD The current BPF tuning value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Turn the encoder to change the current BPF tuning value and adjust RX BPF 6 Press the MENU key to write the current BPF tuning value into the EEPROM 2RX BPF Center frequency 1 Press the LAMP or MONI key on the transceiver to display BPC on the LCD 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 6 of 1RX BPF Lower limit frequency described on page 29 3RX BPF Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display BPH on the LCD 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to dis
116. t steps 4 to 8 of 17 5V TX H power Lower limit frequency described on page 29 37 5V TX H power Upper limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7H on the LCD In this case the icon appears 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 8 of 17 5V TX H power Lower limit frequency described on page 29 G 7 5V TX M power Lower limit frequency center frequency upper limit frequency 17 5V TX M power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P7L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO MR or CALL key to switch to the frequency display 3 Turn the encoder to display the lower limit frequency on the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting 7 Turn the encoder to change the current APC value and adjust the transmission power 8 Press the MENU key to write the
117. the shield cover antenna terminal section 7 Remove two screws holding the shield cover final amplifier section 8 Remove eight screws on the TX RX PC board 9 Absorb solder from the antenna terminal with a solder absorber Note Do not melt the shadow plate when moving the tip of the solder absorber close to the antenna terminal 10 Remove the TX RX PC board from the chassis then remove the encoder volume FPC from the flat cable connector of the TX RX PC board CN2 CN9 CN6 x x c c v m b n z TX RX unit B 3 TX RX unit C 3 TX RX unit A 3 TH K4AT K4E 3 DISASSEMBLY FOR REPAIR Soldering the antenna terminal 1 With the shield cover removed from the antenna terminal section install two screws on the PC board and bring the PC board into contact with the chassis z 2 Solder the antenna terminal with a soldering iron x 3 Remove the two screws installed in step 1 above and install the two screws again on the PC board together with the shield cover c Replacing the final FET Q12 1 Remove the two screws holding the shield cover of the final FET section z 2 Remove solder from the shield cover completely with a solder absorber 3 Remove the shield cover x z x c z x 4 Apply the tips of soldering irons to all the four pins of the final
118. to replace or readjust the IC15 EEPROM Adjust the following adjustment items after setting the transceiver to Adjustment Mode Adjustment Items A Overvoltage warning reference voltage 14 8V DC IN B Battery terminal reference voltage 7 5 V Battery terminal C Squelch SQL1 SQL2 D S meter Two segments in S meter light all segments in S meter light E RX BPF Lower limit frequency center frequency upper limit frequency F 7 5V TX H power Lower limit frequency center frequency upper limit frequency G 7 5V TX M power Lower limit frequency center frequency upper limit frequency H 7 5V TX L power Lower limit frequency center frequency upper limit frequency I 13 8V TX H power Lower limit frequency center frequency upper limit frequency J 13 8V TX M power Lower limit frequency center frequency upper limit frequency K 13 8V TX L power Lower limit frequency center frequency upper limit frequency L DCS modulation balance M Tone deviation Lower limit frequency center frequency upper limit frequency N DCS deviation Lower limit frequency center frequency upper limit frequency O VOX sensitivity Level 1 level 9 Operation in Adjustment Mode 1 Turn the transceiver ON 2 Set the tone frequency to 151 4 Hz and the DCS code to 023 in Menu Mode to adjust tone and DCS modulation 3 Set Adjustment Mode by shorting two lands SET on the component side of the TX RX unit A 3
119. ts WD18 9EB United Kingdom KENWOOD ELECTRONICS EUROPE B V Amsterdamseweg 37 1422 AC Uithoorn The Netherlands KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENWOOD IBERICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001 499 074 16 Giffnock Avenue Centrecourt Estate North Ryde N S W 2113 Australia KENWOOD ELECTRONICS HONG KONG LTD Unit 3712 3724 Level 37 Tower one Metroplaza 223 Hing Fong Road Kwai Fong N T Hong Kong KENWOOD ELECTRONICS TECHNOLOGIES S PTE LTD Sales Marketing Division 1 Ang Mo Kio Street 63 Singapore 569110 Note All specifications General Transmitter and Receiver are guaranteed within the amateur radio band General TH K4AT TH K4E Market code M2 E Number of memory channels 100 50 8 special function memories Antenna impedance Connector type 50 SMA Operating Voltage DC IN Jack DC 12 0 16 0 V 13 8 V nominal Battery terminal DC 6 0 9 0 V 7 2 V nominal Grounding method Negative ground Current Transmit with H 13 8 V DC IN 1 8 A or less Transmit with H 7 2 V PB 43N 2 0 A or less Transmit with M 7 2 V PB 43N 1 5 A or less Transmit with L 7 2 V PB 43N 0 8 A or less Receive no signal 100 mA or less Battery Saver ON Average 30 mA or less Usable temperature range 20 C 60 C 4 F 140 F 10 C 60 C 14 F 140 F with PB 43N F
120. z PTT ON Switch to Adjustment mode and carry out the operations for adjustment item G Refer to page 30 4 LCD display P7L Frequency 430 000MHz PTT ON 5 LCD display P7C Frequency 435 000MHz PTT ON 6 LCD display P7H Frequency 439 995MHz PTT ON Switch to Adjustment mode and carryout the operations for adjustment item H Refer to page 30 7 LCD display P7L Frequency 430 000MHz PTT ON 8 LCD display P7C Frequency 435 000MHz PTT ON 9 LCD display P7H Frequency 439 995MHz PTT ON DC power supply DVM Power meter Am meter TX RX A 3 B GND ANT Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Encoder MENU Write Write Write Write Write Write Write Write Write Note Do not use the DC IN terminal 4 8W 0 05W 2 1A or less 1 5W 0 05W 1 4A or less 0 5W 0 05W 0 8A or less Note Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting TH K4AT K4E 39 ADJUSTMENT Item Condition Measurement Adjustment Specifications Test equipment Unit Terminal Unit Parts Method Remarks 2 TX power Write DC IN terminal 13 8V High power Mid power Low power 3 Battery terminal reference voltage Adjust Check Connect the optional PG 2W DC ca

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