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IC-t2e-t -- Service Manual

1. VCC S5 R161 R ss k 0 15 CLV 2SK880 5 0V VCC W T5 C8 L3 L2 L1 9 5V ED T5 0 001 60nH 60nH 60nH 5 O X T5 Er R298 55 r1 SP1 21215 22 R3 K036NA500 26A27 J5 dla gt E VCC 5 m C234 R186 24 028 gt gt lt gt T5 CPUS LNJ310M6URA C233 0 001 S ee 100 TX 3 8V 25 4081 120 2ppE 5 0 001 R238 RX OV R5 C48 I R 15 oO 45 i s Q20 R182 R15 O 0 001 4 25 1588 2 R215 R183 A vey BOARD 56 nH 100 c5 CHASSIS Y eu B TH 6
2. E 5 1 za 9 5V 6 500 26 27 S e olo E armo VCC e E lo CPU5 CPUS 6164 020 2 i 5 0V 25 1588 R182 I Y NTCCF20124AH S 256 473 i RX L gue ats S 80742SL A6 01 25 1201 MDC P R181 C232 Bas C176 0174 25 1588 C197 100 k 0 1 175 103 R216 C231 19 Let kucas23 040245 R144 220k 2 22 77 Z 12k 150 k 0 1 T u z 33k T7 777 Cl 2 9 NN NN O 10 0404020 0 0 163 246 195 102 0 001 0 1 18 r o o al o o rr o JPM1990 20138 I XP6501 1 023 iua Soo 100 E 040 6 R221 Se 25 4081 lt z lt lt lt lt lt S S S 9 9 9 XP1501 z 161 5 0V S 81250PG PD 330 k 0 001 W LON RBODDDD e e co R139 0 0
3. Q34 CLV R161 R298 T5 e 5 C8 13 12 L1 2 55 0 001 60nH 60nH 60nH CLV 8186 e 0 C233 _L0 001 R21 0 001 100 TX 3 8V 2 C48 238 RX OV C6 C4 CS 1 5 15 pM OV ap 7p 2 BOARD I ins Le c21 ga He 56 nH 47 I 9 Cos ue T C1 CHASSIS o 12 uPD3140GS i C32 m P Lise 7 UNIT i y 0001 20 25 4226 T E MS 28239 47 nH 1 B C19 d I Ca C30 DA ny 6401 I 0 001 18p n C10 PLST JI c T 0 001 Re 09 dq F A 0 001 pg 205 77 C22 L30 25 3074 0 001 15k 3 15p 56 i 3 R18 4 1 D1 04 18k C25 R16 Sio bp 2 1 25 4403 27 270 160 25 4226 Z AH F xi R240 C28 Q1 CR 514 I I 100 0 001 I 470 EUR UK 56 I 0 7V 0 EUR U RX OV 2SK3075 03 T R34 0 1 USA R10 680 ITA USA 10 25 4226 777 1 TX 0 8V Cd RX 0 7V TX 3 2V 0 001 SC RX 1 2V Q3 0 7V 39 nH MA77 2SC3356 C291 1 ns 037 DTA144EU 4455 55 TX 0V R69 TX OV C51 C65 C67 177 RX 4 9V 560 RX 2 8V 0 001 Ap 0 001 1 5 k EUR UK ITA USA TX 0V 179 T I l Q13 RX 0V RX 2 8V T 6o T 2SK360IG 012 029 e 5
4. SERVICE MANUAL 144 MHz FM TRANSCEIVER IC TEH INTRODUCTION This service manual describes the latest service information for the IC T2H E T FM TRANSCEIVER at the time of publication VERSION SYMBOL DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V Such a connection could cause a fire hazard and or electric shock DO expose the transceiver to rain snow or any liq uids DO NOT reverse the polarities of the power supply when connecting the transceiver DO NOT apply an RF signal of more than 20 dBm 100 mW to the antenna connector This could damage the transceiver s front end ORDERING PARTS sure to include the following four points when ordering paris 1 10 digit order numbers 3 2 Component part number and name H Equipment model unit 4 Quantity reguired CH lt SAMPLE ORDER gt 1140006560 S C HD6433875A45H IC T2H UNIT 1 piece 8810009560 Screw 2x6 ZK IC T2H CHASSIS 6 pieces Addresses are provided on the inside back cover for your convenience REPAIR NOTES Make sure a problem is internal before disassembling the transceiver DO NOT open the transceiver until the transceiver is disconnected from its power source DO NOT force any of the variable components Turn them slowly and smoothly DO NOT sho
5. 104 100 1720000370 S VARICAP HVU350TRF 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 1720000370 S VARICAP HVU350TRF 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 1790001260 S DIODE MA2S077 TX 7030003420 S RESISTOR 681 V 680 Q 1790001280 S DIODE MA111 TX 7030003340 S RESISTOR 151 V 150 Q 1790001200 S DIODE MA6S121 TX 7030003290 S RESISTOR ERJ3GEYJ 560 56 Q 1790001200 S DIODE MA6S121 TX 7030003330 S RESISTOR 121 V 120 Q 1790001280 S DIODE MA111 TX except THA 7030003360 S RESISTOR 221 V 220 Q 1790001280 S DIODE MA111 TX ANI only 7030003660 S RESISTOR ERJ3GEYJ 683 V 68 1160000050 S DIODE DAP202U T107 USA 7030003800 S RESISTOR ERJ3GEYJ 105 V 1 1750000220 S DIODE DA113W T107 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 ITA CSA CSA 1 TWN 7030008050 S RESISTOR RR0816R 184 D 180 1750000240 S DIODE DA112 T107 EUR UK THA 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 1750000240 S DIODE DA112 T107 THA TWN 7030003240 S RESISTOR ERJ3GEYJ 220 V 22 Q 1750000130 S DIODE DA204U T107 7030003220 S RESISTOR ERJ3GEYJ 150 V 15 Q 1790000670 S DIODE 5807 03 7030003380 S RESISTOR 331 V 330 Q I 1 N INJ CO N PEEL Ci 1
6. 264 RX E 0 001 30 R5 Q15 TX OV SQL open pea I 55 2SB1201 RX OV SQL close D33 G c 10 ON 5V DTC144TU 999594690 C153 TI T 00000000 O C295 5 TA7368F 320 HE STOVE Ser AST LENA 0 0033 3 5 TX 2 0V 2 5555 5 6 5 900505090 R131 IC3c 927 2 22 322 20000 0009 0 470 NJM2902V 6 034 pou de S cud O M c i 6132 2581132 111 i mig R199 K amp amp amp 4 ae EI ed 5 R267 Ps SBO7 03C 680k RX 10V 47 e C154 J4 18 CH 4 r4 GE EXE 10 Q17 IC3b R128 7 8 9 D18 MA111 R255 2SC4081 2581462 295 R296 NJM2902V R118 10 1k 10 k CHARGE Weg KE 47 1k 152 4 1883 C250 W W R94 R86 z NJM2902V z 10 001 C150 AS ur ie 11 KS2 lt 560k 47k C128 Lous R159 R162 d 147 4 C131 TW e 0006 Fok 1k 004 1358 9299 145 Kb E 604 T 0027 EM Ke BU4066BCFV 621 8 mo xm 100 eus j j j gt AAA AAN 0 1 5V 0 1 D17 m sd MIC VOL IN s Wi s TX OV y e e VOL IN BATT 5263 RX 0 4V n E VOLOUT Ig j 0 L C203 ae zie EMIC E 0204 d er m RX 0 oz DCL 777 172 470 UNIT RIGHT SIDE LEFT
7. 47 15 15 1 56 560 1 10 nd ERJ3GEYJ 103 V 10 ANI only ERJ3GEYJ 393 39 ERJ3GEYJ 683 V 68 ERJ3GEYJ 224 220 ERJ3GEYJ 334 330 ERJ3GEYJ 473 47 EXB V8V 102JV ERJ3GEYJ 102 1 ERJ3GEYJ 103 10 ERJ3GEYJ 223 22 ERJ3GEYJ 473 47 ERJ3GEYJ 823 82 ERJ3GEYJ 104 100 ERJ3GEYJ 102 1 EXB V4V 104JV 100 ERJ3GEYJ 150 15 Q ERJ3GEYJ 102 1 ERJ3GEYJ 101 100 ERJ3GEYJ 471 470 EUR ITA USA ERJ3GEYJ 223 22 ERJ3GEYJ 104 100 ERJ3GEYJ 223 22 ERJ3GEYJ 473 47 ERJ3GEYJ 823 82 ERJ3GEYJ 184 180 ERJ3GEYJ 334 330 EXB V4V 102JV 1 EXB V8V 102JV EXB V4V 102JV 1 EXB V8V 102JV EXB V8V 102JV EXB V4V 102JV 1 ERJ3GEYJ 684 V 680 ERJ3GEYJ 104 100 ERJ3GEYJ 102 1 ERJ3GEYJ 102 1 ERJ3GEYJ 153 15 ERJ3GEYJ 224 220 RR0816R 334 D 330 ERJ3GEYJ 151 150 ERJ3GEYJ 682 6 8 ERJ3GEYJ 123 12 ERJ3GEYJ 223 22 ERJ3GEYJ 472 4 7 ERJ3GEYJ 104 100 ERJ3GEYJ 270 27 ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 102 ERJ3GEYJ 102 ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 104
8. 8 1 TRANSISTORS 8 2 DIODES SYMBOL INSIDE VIEW SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW K3 K2 Ki DA112 MA6S121 2SK880 Y 5 5 At DTA114TU T DA113W MA77 DTC144EU UN521D DA204U 25A1588 GR 25B1132 R 25B1201 S SB07 03C TB 25C3356 R25 25 4081 5 25 4215 O 1501 AB DAP202U 25 4226 25 25 4403 HVU131TRF P1 2SK3074 XP6401 HVU350TRF 4 A K 25 3075 111 1 K B SECTION9 BOARD LAYOUTS The combination of this page and the next page shows 9 1 MAIN UNIT the unit layout in the same configuration as the actual P C Board e TOP VIEW a 3 SERIE ANTENNA Q1 p RIT 0172 J1 SP E M E E O CHASSIS 5 B 17 S H z di Fea uj dk Hi B ze P S 2 R18 DT EL de x dip Sg E MN y SS 55 St eGNDO le Jep Jsp A 18 LV Y 3 a E 7 ST 7 Ho
9. 1 1 1 1 1 1 1 1 1 100 00 ANI only ERJ3GEYJ 560 V 56 ERJ3GEYJ 103 10 S Surface mount UNIT ORDER ORDER ENE Se 7030003440 7030003440 7030003440 7030003240 4030006980 4030009520 4030007040 4030006980 4030007050 4030009910 4030007030 4030006860 4030006860 4030006860 4030007100 4030006860 4030006860 4030007070 4030006860 4030006860 4030006860 4510004640 4030007030 4030006860 4030006860 4030007060 4030006860 4030007070 4030006860 4030007040 4030006860 4030006860 4030006860 4550006360 4550006160 4030006860 4030009520 4030006860 4030011600 4030007080 4030007050 4030009910 4030007010 4030006860 4610002140 4030006860 4030009920 4030006860 4030011600 4030006900 4030007050 4030007040 4030009530 4030007080 4030007080 4030007150 4030007080 4030006860 4030006860 4030007090 4030009500 4030006860 4030007090 4030009560 4030006860 4030006860 4030007030 4030006860 4030007030 4030006860 4030006900 4030006860 4030006860 4030006860 4030006860 4030006860 4030007010 4030006860 S RESISTOR S RESISTOR S RESISTOR S RESISTOR S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROL S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CER
10. 47 1530002280 S TRANSISTOR 25 4081 107 5 7030003380 S RESISTOR ERJ3GEYJ 331 V 330 Q 1530002280 S TRANSISTOR 25 4081 7107 S 7030003290 S RESISTOR 560 56 Q 1590000720 S TRANSISTOR DTA144EUA T106 7030003200 S RESISTOR ERJ3GEYJ 100 10 Q 1590001060 S TRANSISTOR DTA114TUA T106 ANI only 7030003460 S RESISTOR ERJ3GEYJ 152 1 5 1590001170 S TRANSISTOR XP1501 TX AB 7030003490 S RESISTOR ERJ3GEYJ 272 2 7 7030003270 S RESISTOR ERJ3GEYJ 390 39 Q 7030003320 S RESISTOR ERJ3GEYJ 101 100 Q 1790000620 S DIODE MA77 TX 7030003370 S RESISTOR ERJ3GEYJ 271 V 270 Q 1790000620 S DIODE MA77 TX 7030003590 S RESISTOR ERJ3GEYJ 183 V 18 1790000620 S DIODE MA77 TX 7030003640 S RESISTOR ERJ3GEYJ 473 47 1710000870 S DIODE HVU131TRF 7030003320 S RESISTOR ERJ3GEYJ 101 100 Q lt gt yl A rr 1 09 Fy ly IO y Ti Oo IND HA lt o r IA Ol N Bei 102 N eo LAN NNI 3 O y Or E N D as IND MAN Di EA I E EE AA AA ei EA OL E gt ANN 3 3 3 819 RA DONO tO Xo O DD DDD DDD DD IO I 1109 HCI oh a 1720000370 S VARICAP HVU350TRF 7030003680 S RESISTOR
11. Double conversion superheterodyne 1st 30 85 MHZ 2nd 450 kHz Less than 0 18 pV 122 dBm Less than 0 18 pV 122 dBm More than 15 kHz 6 dB Less than 30 kHz 60 dB 60 dB typical 500 mW typical at 10 distortion with an 8 Q load 3 conductor 3 5 d mm 1 8 Q All stated specifications are subject to change without notice or obligation 2 INSIDE VIEWS e MAIN UNIT TOP VIEW Low pass filter circuit E RF amplifier Q12 28K3601G 1st mixer circuit Q13 28K3601G Power amplifier Q1 25 3075 Analog switch IC4 BUA066BCFV below the mic FM IF IC 2 TA31136FN PLL IC 1 LPD3140GS TX RX switching 03 04 77 7 2504051 2 7 VIEW switching circuit D8 D32 HVU131TRF Current detector circuit Crystal filter 1 FL 251 30 85 MHz VCO circuit Microphone amplifier IC3 NJM2902V control circuit 8 reference oscillator X1 CR514 15 2 MHz SECTION3 DISASSEMBLY INSTRUCTIONS e Removing the chassis panel D Unscrew 1 nut and remove 1 nob 2 Unscrew 2 screws 3 Remove the the chassis in the direction of the arrow Unplug J6 to separate front panel and chassis Chassis nickel 2 mm x 2 Front panel MAIN UNIT Top view chassis pan
12. 1 0 001 __ TM 777 777 C172 PP o o ej O O 2 S S 2 B COMPLETE VIEW 14 54 256 EM ES sg 1 2 IN gt 5 a OL P97 SEG40 P96 SEG39 P95 SEG38 P94 SEG37 P93 SEG36 P92 SEG35 P91 SEG34 P90 SEG33 P87 SEG32 P86 SEG31 P85 SEG30 P84 SEG29 P83 SEG28 63 P82 SEG27 62 1k CTDA2 R286 1 k 61 CTDA1 P81 SEG26 P80 SEG25 60 1k CTDAO P77 SEG24 59 Daos _ 245 22 T4 PWR R246 47 k P76 SEG23 58 4 P75 SEG22 57 0 R247 82 k 180 P7z4 SEG21 56 2 Bok 55 Daor 1249330 P72 SEG19 L 54 DA00 R258 680 k P71 seG18 53 AFON E P70 SEG17 92 LIGHT R284 1k P67 SEG16 S T5C ape W TXC R237 0 1100k 57 AM RMUT W W MMUT T5 DS2 LNJ310M6URA 330 DS3 LNJ310M6URA Q25 25 4081 T un R204 DS4 LNJ808R8ERA R205 R155 8 470 TIP 051 LM 1462B 1 1 2 2 3 4 SEG29 5l sEG1 5 44 18 sEG14 27 28 29 30 VCC
13. 66 102 0 001 2SK360lG 0 001 260 25 4226 Ce 15 EUR UK ITA USA 0 5p R52 he 1M D11 0 D12 HVU350 p R53 HVU350 10k C71 1 R54 0 001 So 995 SHREK 99 cer L R66 R64 P I R47 41 I 400k 100 900 T 120 m7 not C97 C96 C78 0 75p 47 OV 75 9 BX 0 8V 0 01 C243 T 95 NJM2902V 0 001 D Q14 0 001 O m 25 4215 9 2 VCC VCC VCC a R5 R5 S5 S5 45 gt 15 TX 0V SQL open R167 2SB1201 RX 0V SQL close 390 k bg R97 20 SE IC3c 180 k de 0295 5 TA7368F D 470 NJM2902V 6 W T 0 001 220 R294 0032 7 C212 R98 C135 NC POUT 10k r 10 5 0 01 y 180k 220 p d VCC PWGND 114 ET Q17 9 R107 47 k R117 VIN PREND 2581462 IC3b 80k 14 15k R261 R295 R296 R104 NJM2902V 0213 12 RIPPLE 1k lt s 1k 1k 00 105 0 1 d S VCC Y W W s R94 169 IC3d T R126 12k 50 560k 47K 8 2 k NJM2902V 5 147 R130 133 R159 R116 il 55 0 1 R297 0 1 R109 100k 1 T xL Se 1 10 0 0022 Se 00477 145 ud 100 C220 xa VOL IN VOL IN VOLOUT VOL OUT AF OUT AF OUT EMIC R5C MMUT MAIN UNIT AFON COMPLETE VIEW SECTION 11 VOLTAGE DIAGRAM
14. B N E g E DI SEE s O y UR eg Kies e ee Ei a 9 3 VCO BOARD 9 2 VR BOARD TOP VIEW e TOP VIEW a 54 EFE E 3 y E AREA J fen SA D UNIT GND VCC J Heg lh x 44 SHIFT GND S5V VCO OUT BOTTOM VIEW ui EXT MIC J2 PTT SWITCH VR BOARD e BOTTOM VIEW lt lt x m 2 O LU 0 1NV 421 INOudd3 XIHLYN 2 A3M 2 2 2 2 V Z V C9 6c DIS FL WOO ZHIN 8 9 CN 3NI XL ANI Im gt HOLIMS INV zea La 1 3NO19 i HOLIMS H3MOd O NI INO IO uadana 2621 8819 90194 NO AV GL 401 V ch ZHIN CH door S I Tld 1 pO 9D BG SE ZHN 2 51 LO DISOO JIN LNO AV K SO SES 910 SLO O JIN 1d0 H OIN 1x3 O O HA gt Mover 5 10 1 SECTION 11 VOLTAGE DIAGRAM
15. mm em mm mee km mmmmmummmmmummmummmmmmumummumm 5 2 PLL TRANSMITTER ADJUSTMENTS MEASUREMENT ld ADJUSTMENT ADJUSTMENT CONDITION ALE UNIT LOCATION PLL LOCK Operating frequency 146 000 MHz MAIN Connect a digital multi UNIT ADJUST 111 VOLTAGE Receiving meter to the check point LV REFERENCE 1 Operating frequency 146 000 MHz Top an RF power 146 000000 MHz MAIN C68 FREQUENCY Transmitting panel meter or a terminator to the antenna con nector and loosely couple a frequency counter OUTPUT 1 Operating frequency 146 000 MHz Connect an RF power 4 5 W THA POWER e HIGH LOW switch HIGH panel meter to the antenna 5 5 W other Panel Cw e Connect the to the SP jack connector while e HIGH LOW switch LOW transmit Transmitting ng FM 1 Operating frequency 146 000 MHz Connect an FM devia 4 5 kHz MAIN R119 DEVIATION e HIGH LOW switch HIGH tion meter to the Connect an audio generator to the antenna connector MIC jack and set through an attenuator 1 kHz 90 mV Set an FM deviation meter as HPF OFF LPF 20 KHz De emphasis OFF Detector P P 2 Transmitting e MAIN unit Reference frequency adjustment L11 PLL lock voltage adjustment LV PLL lock voltage check point R119 FM deviation adjustment Bottom view Top view 5 3 RECEIVE
16. sheet THA 1902 sheet J SEA CSA 1 TWN ANI 1902 Rear sheet K USA 1902 Rear sheet L EUR UK ITA Nut antenna connector 101 Screw PH M2x4 ZK Screw PH BT M2x4 NI ZU Screw PH BT M2x4 NI ZU hb sesch sesch Il Ill ll ll h 8810009510 8810009560 8810009560 8830001010 8510011170 8510011241 8930043730 8930043610 8930046430 8930048150 8510012000 MAIN UNIT VCO BOARD cad DESCRIPTION ary Screw PH NI ZU Screw PH BT M2x6 ZK Screw PH BT M2x6 ZK Hex nut A 1902 VCO cover 1902 PA shield plate 1 EUR UK ITA Isolating sheet FB EUR UK ITA Isolating sheet EZ 1902 MIC sponge Sponge FZ 2191 VR rug plate 8510010920 1902 VCO case Screw abbreviations PH Pan head Self tapping NI Nickel ZK Black 7 2 ACCESSORIES ORDER TET ee m 3030000420 NICD cel KRO 7AAUR SAFT USA EUR UK ITA CSA 1 NICD cel KRO 7AAUR ASIA SEA THA TWN ANI Charger BC 110A USA CSA TWN Charger BC 110D EUR ITA SEA THA ANI Charger BC 110C CSA 1 Antenna FA B2C ACC Battery case BP 194 1922 Belt clip 20 O co n gt gt Sif e Sif O gt 14 Note MAIN unit VCO board VCO CHASSIS 552 SECTION8 SEMI CONDUCTOR INFORMATION
17. TRANSMITTER Output power 9 6 V DC Modulation system Max frequency deviation e Spurious emissions External microphone connector RECEIVER Receive system Intermediate frequencies Sensitivity 12 dB SINAD Squelch sensitivity threshold e Selectivity Spurious and image refection ratio except 2nd IF image frequency Audio output power at 9 6 V DC External speaker connector SPECIFICATIONS Version U S A 140 000 150 000 136 000 174 000 Italy Asia ANI 5 Europe U K Thailand 144 000 146 000 MHz 144 000 146 000 MHz 136 000 174 000 MHz 136 000 174 000 MHz 145 000 146 000 MHz 145 000 146 000 MHz Guaranteed frequency range 144 148 MHz FM F2 Transmit at 6 0 W 1 6 A typical at 5 0 W 1 5 A typical Thailand at 1 0 W 0 7 A typical Receive audio 210 mA typical power saved 25 mA typical standby 80 mA typical 10 ppm 0 C to 50 C 32 F to 122 F 10 to 60 C 14 F to 140 F 50 43 ch 40 regulator 2 scan edges and 1 call 9 6 V DC supplied Ni Cd cells negative ground 5 kHz and 12 5 kHz 58 W 140 5 H x 32 3 D mm 2932 W x 51732 x 1932 D inch 420 g 14 8 oz 6 W typical high 5 W typical high Thailand only 0 7 W typical low Variable reactance frequency modulation 5 kHz Less than 60 dB 3 conductor 2 5 d mm 2
18. REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage 9 6 VDC Frequency range 300 3000 Hz DG power supply Current capacity 5 more Measuring range 1 500 Measuring range 1 10 W ENEE Power attenuation 40 or 50 dB RF power meter Frequency range 120 300 MHz Capacity 10 W or more terminated type Impedance 50 Q SWR Less than 1 2 1 Standard signal e 22 generator SSG EE ae 127 to 17 dBm Frequency range 0 1 300 MHz Frequency counter Frequency accuracy 1 ppm or better Sensitivity 400 mV or batter DC voltmeter Input impedance 50 kQ V DC or better I Frequency range DC 20 MHz a Frequency range DC 300 MHz Oscilloscope deviation meter Measuring range 0 to 5 kHz Measuring range 0 01 20 V Digital multimeter Input impedance 10 MQ V DC or better AC millivoltmeter Measuring range 10 10 V CONNECTIONS Standard signal generator FM deviation Attenuator meter 40 dB or 50 dB DO NOT transmit while Frequency an 550 is connected to counter the antenna connector DC power supply detailed illustration below connect soldering here Power supply connection connect soldering line here w mm um Gm mm em ee mm mm mm u u w m m m mm mm mm VR board a um um um um
19. XTAL 514 15 200000 2 1110003490 5 TA31136FN D EL 6050010110 S XTAL CR 584 6 79966 MHz 1110003780 5 NJM2902V TE1 6050009020 5 EFOS4194E3 ANI only 1130008090 S BU4066BCFV E1 6070000210 S DISCRIMINATOR CDBCA450CX24 1110001810 S TA7368F TP1 1180001080 S S 81250PG PD T1 1140006050 S 250406 2 7 6 1140006470 5 HD6433875A41H THA only 1140006560 5 6433875 45 1130007560 5 LC73881M TLM ANI only 1130004170 S 4501 TE85R ANI only 1110003500 S IC S 80742SL A6 T1 Q e IE Wel 100 Pa E I P OO CH wk 6200008260 S COIL 0 30 1 7 8TL 60N 6200008260 S COIL 0 30 1 7 8TL 60N 6200008260 S COIL 0 30 1 7 8TL 60N 6200008710 S COIL 0 28 1 1 4TR 14 3N 6200008480 S COIL 0 30 1 4 5TR 25N 6200002820 S COIL 1 47NJ04 6200006990 S COIL ELJRE 56NG F 6200006990 S COIL ELJRE 56NG F 6200003640 S COIL MLF1608K 100K T 6200002930 S COIL ELJFC 1R5K F 6200007000 S COIL ELJRE 82NG F 6200008260 S COIL 0 30 1 7 8TL 60N 6200008500 S COIL 0 30 1 3 6TL 28N 6200005700 S COIL ELJRE 22NG F 6150004960 S COIL LS 523 6150004960 S COIL LS 523 6200004950 S COIL NL 25201 8T 1R8J 6200003550 S COIL MLF1608A 4R7K T 6200002710 S COIL ELJFC 1R8K F 6200004480 S COIL MLF1608D R82K T 6200002930 S COIL ELJFC 1R5K F 6200006990 S COIL ELJRE 56NG F 6200006990 S COIL ELJRE 56NG F 6200005730 S COIL EL
20. 1C 104KT N C1608 JB 1E 103K T A C1608 CH 1H 220J T A C1608 CH 1H 180J T A C1608 CH 1H C1608 CH 1H 390J T A C1608 CH 1H 390J T A C1608 CH 1H 151J T A C1608 CH 1H 390J T A C1608 JB 1H 102K T A C1608 JB 1H 102 C1608 CH 1H 470J T A C1608 CH 1H OR5B T A C1608 JB 1H 102K T A C1608 CH 1H 470J T A C1608 CH 1H R75B T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A SEA THA CSA CSA 1 TWN ANI S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC C1608 CH 1H 150J T A EUR UK ITA USA C1608 JB 1H 102K T A C1608 CH 1H 150J T A C1608 JB 1H 102K T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 100D T A C1608 JB 1H 102K T A MAIN UNIT 4030006900 4030008680 4030011600 4030006850 4030006850 4030006860 4030006900 4030008650 4030008850 4030008680 4550006680 4030006900 4030006870 4030011600 4030007140 4030007170 4030006870 4030008920 4550006600 4030006860 4030006860 4030006860 4030011600 4030006860 4510007120 4030006860 4030011600 4030011600 4030011600 4550006700 4030007090 4030011600 4510005370 4550006200 4510004630 4030006860 4030006860 4510005320 4030006860 4030006900 4030006900 4030006860 4030006860 4030006860 4030006860 4030006860 4030007050 4030006860 4030006860 4030006860 4030
21. 1C 473K T A C1608 JB 1C 273K T A C1608 JB 1H 332K T A ECST1EY474R S Surface mount UNIT ORDER SS es 4030011600 4030011600 4030006860 4030006860 4030009530 4030006860 4030006860 4030011600 4030006860 4030006900 4030006900 4030006900 4030006900 4030006860 4030006860 4030011600 4030006860 4030011600 4030006900 4550006680 4030007120 4030007030 4030006860 4030009000 4550006150 4030006860 4030011600 4030007070 4030007090 4550006650 6450001680 6450001690 6450000870 6510007080 6910010850 5030001460 5010000160 5010000160 5040002190 7700002160 2230000900 7030003860 7030003860 910050712 8930042590 S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM C1608 JB 1C 104KT N C1608 JB 1C 104KT N C1608 JB 1H 102K T A C1608 JB 1H 102K T A 1608 CH 1H C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1C 104KT N C1608 JB 1H 102K T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1C 104KT N C1608 JB 1H 102K T A C1608 JB 1C 104KT N C1608 JB 1E 103K T A ECSTOJY156R
22. SIDE ti i 6 9 16 Kamihigashi 547 0002 Japan Phone 06 793 5302 Fax 06 793 0013 Headguarters gt 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 425 454 8155 425 454 1509 URL http www icomamerica com Customer Service Phone 425 454 7619 Icom Canada A Division of Icom America Inc 3071 5 Road Unit 9 Richmond B C V6X 2T4 Canada Phone 604 273 7400 Fax 604 273 1900 Icom Australia Pty Ltd A C N 006 092 575 290 294 Albert Street Brunswick Victoria 3056 Australia Phone 03 9387 0666 03 9387 0022 Asia Icom Inc 6F No 68 Sec 1 Cheng Teh Road Taipei Taiwan R O C Phone 02 2559 1899 02 2559 1874 Icom Europe GmbH Communication Equipment Himmelgeister Str 100 D 40225 D sseldorf Germany Phone 0211 346047 Fax 0211 333639 URL http www icomeurope com Icom Telecomunicaciones s l Edificio Can Castanyer Crta Gracia a Manresa km 14 750 08190 Sant Cugat Del Valles Barcelona SPAIN Phone 93 589 46 82 93 589 04 46 E mail icom lleida com Icom UK Ltd Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 01227 741741 Fax 01227 741742 URL http www icomuk co uk Icom France S a Zac de la Plaine Rue Brindejonc des Moulinais BP 5804 31505 Toulouse Cedex France Phone 561 36 0303 Fax
23. The microphone amplifier circuit amplifies audio signals with 6 dB octave pre emphasis characteristics from the micro phone to a level needed for the modulation circuit The AF signals from the microphone are applied to the micro phone amplifier circuit IC3c pin 10 The amplified AF sig nals are passed through the low pass filter circuit IC3d pins 13 14 via the analog switch IC4 pins 2 3 The filtered AF signals are applied to the modulator circuit after passing through the analog switch IC4 pins 8 9 and the deviation adjustment pot R119 4 2 2 MODULATION CIRCUIT The modulation circuit modulates the VCO oscillating signal RF signal using the microphone audio signal The audio signals SHIFT change the reactance of D6 to modulate an oscillated signal at the VCO Q7 Q8 The oscil lated signal is amplified at the buffer amplifiers Q4 06 then applied to the T R switching circuit D3 D4 4 2 3 DRIVE POWER AMPLIFIER CIRCUITS The signal from the VCO circuit passes through the T R switching circuit D3 and is amplified at the buffer Q3 drive Q2 and power Q1 amplifiers to obtain 5 5 W 4 5 W Thailand only of RF power at 9 6 V DC typical The ampli fied signal passes through the antenna switching circuit D1 and low pass filter L1 L3 C1 C7 and is then applied to the antenna connector J1 The bias current of the drive Q2 and power Q1 amplifiers is controlled by the APC circuit to stabilize
24. the output power 4 2 4 CURRENT DETECTOR CIRCUIT The current detector circuit Q9 Q28 R161 detects total dri ving current of the drive and the power amplifiers using the current sensor R161 The differential amplifier Q9 detects voltage differences between the current sensor input and output voltages then outputs control voltage to the APC cir Cuit Driver Power to antenna amp amp 4 2 5 CIRCUIT circuit 037 protects drive and power ampli fiers from excessive currents and selects HIGH or LOW out put power The output voltage from the current detector circuit is applied to the inverting amplifier IC3a 2 and the T4 PWR sig nal from the CPU IC8 pins 54 59 is applied to the other input for reference When the driving current increases the input voltage of the differential amplifier Q9 pin 1 will be decreased In such cases input voltage of the inverting amplifier pin 2 is increased to decrease the output power Q37 is controlled by the TXC signal from the CPU 168 pin 50 to select HIGH or LOW output power 4 3 PLL CIRCUIT A PLL circuit provides stable oscillation of the transmit fre quency and receive 1st LO frequency The PLL output com pares the phase of the divided VCO frequency to the refer ence frequency The PLL output frequency is controlled by the divided ratio N data of a programmable divider The PLL circuit contains the VCO circuit Q7
25. 006850 4510004640 4510005430 4510005430 4510005430 4550006680 4030006900 4030006970 4030007060 4030007040 4030006860 4030006860 4030006900 4030006900 4030006860 4030006860 4030006860 4030006860 4030006860 4030006860 4030011600 4030006900 4030011600 4030011600 4030006860 4030011600 4030008920 4030008850 4030008920 4030008890 4030008650 4550006140 S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROL S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S ELECTROL S TANTALUM S ELECTROL S CERAMIC S CERAMIC S ELECTROL S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROL S ELECTROL S ELECTROL S ELECTROL S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM C1608 JB 1E 103K T A C2012 JF 1C 105Z T A C1608 JB 1C 104KT N C1608 JB 1H 47 C1608 JB 1H 47 1K T A 1K T A C1608 JB 1H 102 C1608 JB 1E 103K T A C1608 JB 1H 332K T A C1608 JB 1C
26. 03290 7030003560 S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S ARRAY S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S ARRAY S RESISTOR S RESISTOR S RESISTOR SEA THA CSA CSA 1 TWN ANI S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S ARRAY S ARRAY S ARRAY S ARRAY S ARRAY S ARRAY S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR ERJ3GEYJ 331 ERJ3GEYJ 473 ERJ3GEYJ 183 ERJ3GEYJ 183 ERJ3GEYJ 183 ERJ3GEYJ 103 ERJ3GEYJ 684 ERJ3GEYJ 472 ERJ3GEYJ 102 ERJ3GEYJ 473 ERJ3GEYJ 473 ERJ3GEYJ 153 ERJ3GEYJ 153 ERJ3GEYJ 102 ERJ3GEYJ 563 ERJ3GEYJ 564 ERJ3GEYJ 102 ERJ3GEYJ 103 ERJ3GEYJ 123 12 8168 334 0 330 RRO816R 154 D 150 330 0 47 18 18 18 10 680 4 7 1 47
27. 1 I I 2 218 R219 D14 0 0 0 00 4 7k E 39 68 k 25077 R133 Q36 R148 R214 R137 1k 25 4081 he 100 k 12k 4 7k O G pa C160 C159 R146 R147 d Ci J6 0 001 0 01 0 001 Se 27 al 100 220 0 001 Z C157 156 z 75 8 40 a m 0 001 0 001 ug PBO AND FS97 SEG40 PR 1 4 el x 7 Qo 96 5 039 ob VOL IN Q D D C158 C155 D15 C144 AVSS l VOL OUT E En 100 10 MA111 0 001 TEST P95 SEG38 2 P94 SEG37 UD oe X1 P93 SEG36 5 9 55 P92 SEG35 I Leo Coe EES 5 OSCH I R291 P91 SEG34 i 100 OSC2 d 2 See P90 SEG33 VR BOARD 2222 o 428 eer NMI P87 SEG32 eee mm m 1 fm 1 3 gi Mee P20 IRG4 ADTRG IC8 P86 SEG31 KR2 1 1 5 m IW 5 0 I P21 SCK1 HD6433875A44H THA P85 SEG30 W 2504051 2 7 P22 SI1 HD6433875A45H Other P84 SEG29 KR0 8 EXT 4 Ee 23 501 P83 SEG28 63 4 7 EMIC Oty Ge P24 SCK3 P82 SEG27 62 1k CTDA2 SE gt i P25 RXD P81 SEG26 L I R286 1 CTDA1 C165 P R285 0 001 ieee lt lt P26 YXD P80 SEG25 60 o CTDAO 1 1 I I 1 ANI only LC73881M Q39 lt L Bay P27 IRQO P77 SEG24 59 Daos 245 Ta PwR MA68121 DTA114TU P17 IRQ3 TMIF P7
28. 123K T A C2012 JF 1C 105Z T A ECSTOJY156R C1608 JB 1E 103K T A C1608 JB 1H 222 C1608 JB 1C 104KT N C1608 CH 1H 121J T A C1608 CH 1H 221J T A C1608 JB 1H 222 C1608 JB 1C 473K T A ECSTOJY335R C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1 104 C1608 JB 1H 102K T A ECEV1AA101SP C1608 JB 1H 102K T A C1608 JB 1 104 C1608 JB 1 104 C1608 JB 1 104 ECST1AY106R C1608 CH 1H 470J T A C1608 JB 1C 104KT N ECEV1AA221P ECSTOJY106R ECEV1CA100SR C1608 JB 1H 102 C1608 JB 1H 102 ECEVOJA101SP C1608 JB 1H 102K T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 220J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 47 1K T A ECEV1CA470SP ECEVOJA220SR ECEVOJA220SR ECEVOJA220SR ECSTOJY156R C1608 JB 1E 103K T A C1608 CH 1H 0600 C1608 CH 1H 270J T A C1608 CH 1H 180J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1 104 C1608 JB 1E 103K T A C1608 JB 1 104 C1608 JB 1 104 C1608 JB 1H 102K T A C1608 JB 1 104 C1608 JB 1C 473K T A C1608 JB 1C 123K T A C1608 JB
29. 2B 1 p 47 C218 C300 TX 5 0V 0 001 TX 0 8V 1 0 001 6 8 RX OV IL Rx 0 7v TX 3 2V 100 B20 k P97 SEG40 Ge E RX 1 2V C160 T COM2 2 a ake 6001 0 01 2 ti KADANG P96 SEG39 211 001 AAN Ci J6 3 R30 0 0 m a 777 AVSS COM2 100 1 0 001 C144 P95 SEG38 4 291 L Barr o o 155 IS od TEST essi Accu PS 2 j T RV 312 I VOL IN D rc d FS SEG29 5 Q32 E X2 SEGI 1LD R1 2D 2LO TX OV DTA1 44EU I H 1 P93 SEG36 Ge peer UN521D a A VSS P92 SEG35 ESL SI SE B 5 t CDBCA450CX24 135 TX OV DU gp ed pc j gt Tx ov EUR UK 889 RX 2 8V i A 5 5 2 ee SEG5 TX 0V 470 RX 4 9V ITA USA 1 T UK ITA USA Se TX 0V OV I UK To 1 A RES P87 SEG32 SEG6 R81 013 ROS 330 012 RX 0V RX 2 8V D NMI ur 11 470 EN 2SK360IG 1 5 858 029 C69 I Eu P86 SEG31 SEG7 Wi FL 251 d C99 22 2SK360IG 0 001 VR BOARD R253 P20 IRG4 ADTRG IC8 ndi a E 60 7 MEL KR3 ez SI 1e HD6433875A41H THA ibi 0 001 C94 C260 L LAMA 29 64 SEG29 SEGI 15 p EUR UK ITA USA 0 5 p 0 001 56 KR2 IC7 SO or i P22 SM HD6433875A45H Other P84 SEG29 WEEZER pcm OSCOUT 82 C110 1 2 mu 60 nH KR1 2 W P83 SEG28 6
30. 3 MIXOUT 0 001 zm D10 x 2504051 2 7 UNLK UW 14 pos sO1 d SEG11 Ce 122 120 Bi min LIS Y HVU350 7 LAM Set 15 p24 SCK3 P82 SEG27 62 mm soe 16 SEG12 1 8 pH 1 8 uH HVU350 5988 Cie R290 R286 1k cTDA1 IFIN EXT Qo IR1 DST CLOUT yy 1k 16 P81 SEG26 61 pes DEE al 859 F CTDAQ EG 4 07 PLST 17 po6 YxD P80 SEG25 60 Waa E 5 044 18 sEG14 FILOUT 001 i one noo TP T 6001 Cer 139 HVUISITRF 677 976 Ee IC9 lt R227 R256 18 P77 SEG24 59 05 E om I 100 k 100 d Ser 22 nH 1 1 1 TT i ANI only LC73881M 039 only NOIS W K 17 P76 SEG23 58 04 UTEM ME T URSI 3 Se cor Ge 575 71 os DTA114TU OPINT W E P16 IRQ2 P75 SEG22 57 0 m ure 2 2k EE E FC B BV N JM2902V 0001 E 1 i ECS 21 P15 1RQ1 P74 SEG21 56 DA ov C105 z R249 330 777 RX 0 7V 0 001 14 ET ER ME amp J3 PO P1 P2 P3 R208 R209 __ 014 E WT 56 k 560 k P72 SEG19 steet 25 25 4215 R260 P12 TMOFH AFON T MT OPCS M 29 P11 TMOFL 2 LIGHT k 27 voc EXT EE P70 SEG17 5 Ge E 1 2 3 A 1 1 5 pl ee Ap Gen eons P67 SEG16 HE
31. 3 V 10 ERJ3GEYJ 473 V 47 ERJ3GEYJ 471 470 Q MCR10EZHJ 18 180 MCR10EZHJ 18 180 ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 104 100 MCR10EZHJ 120 121 ERJ1WRSJR15U 0 15 0 ERJ3GEYJ 102 1 ERJ3GEYJ 153 15 ERJ3GEYJ 104 100 ERJ3GEYJ 104 100 ERJ3GEYJ 103 10 ERJ3GEYJ 822 8 2 ERJ3GEYJ 153 15 ERJ3GEYJ 562 5 6 ERJ3GEYJ 472 4 7 RRO0816R 104 D 100 7510000910 S THERMISTOR 2012 473KC T MAIN UNIT 7030003380 7030003640 7030003590 7030003590 7030003590 7030003560 7030003780 7030003520 7030003440 7030003640 7030003640 7030003580 7030003580 7030003440 7030003650 7030003770 7030003440 7030003560 7030003570 7030005520 7030005630 7030003560 7030003630 7030003660 7030003720 7030003740 7030003640 7410000950 7030003440 7030003560 7030003600 7030003640 7030003670 7030003680 7030003440 7410000750 7030003220 7030003440 7030003320 7030003400 7030003600 7030003680 7030003600 7030003640 7030003670 7030003710 7030003740 7410000770 7410000950 7410000770 7410000950 7410000950 7410000770 7030003780 7030003680 7030003440 7030003440 7030003580 7030003720 7030005520 7030003340 7030003540 7030003570 7030003600 7030003520 7030003680 7030003250 7030003440 7030003440 7030003440 7030003440 7030003440 7030003440 7030003440 7030003440 7030003440 7030003680 70300
32. 561 36 03 00 URL http Awww icom france com Count on us Icom Inc A 5518MI S 6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan O 1998 by Icom Inc
33. 6 SEG23 58 DA04 R246 47 k C166 MASSI 0 001 R254 FRR lt E A A 5 15 1 J3 AF OUT 1KS5 14 R249 so M lt R208 se _ LN LAM KS4 56 k 560 k 2 E sh P73 SEG20 55 _ EXT E Q 54 DAOO R258 680 CLONE e 27 pondus P12 TMOFH P72 SEG19 1 1 k 5 N d CTDA2 P11 TMOFL P71 SEG18 53 TX CTDA1 P70 SEG17 52 LIGHT R284 1 k E 031 5 01 voll 0 001 CTDAO P67 SEG16 3 E C167 C169 0299 DTC144TU I D33 Be I I R236 p 1k TX s pri iF wi a TITETTE Ga TEE De zov 5 E Pb 034 ata 2 E 9 01150 00 258 x 111 RX 0 5V 2 COSSIO J4 iu SB0703C 197 vum 8199 P ou coOsasdappibboorousosp C E 680 k 1 0 4 7 k le gt gt gt gt D20 Q33 Q35 230 R231 D18 111 10k 322k lt 47k 59 8 93 3 9 9939 3 CHARGE m 255 28C4081 Jh R202 W od A KS C250 De 202 Lag TM I 0 01 C200 0 001 d Ei i I KE I C228 C226 Bk 0 001 ES C249 T 0 0033 A I UM 227 q 4 e R224 10 R235 g BATT EE 2 100 k AE E AN R195 SE MA6S121 18k BATT SES ee 171 R263 04 L 1k R158 i RMU GND 0000 poq F AS 220 k 199 W DA204U cos T KE 0001 1 4V 8 0 01 A 2222322
34. 7030003680 7030003720 7030003680 7030003560 7030003640 7030003400 7030000170 7030000170 7030003520 7030003680 7030000270 7030007330 7030003440 7030003580 7030003680 7030003680 7030003560 7030003550 7030003580 7030003530 7030003520 7030005870 S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR ERJ3GEYJ 222 V ERJ3GEYJ 560 V ERJ3GEYJ 222 V ERJ3GEYJ 471 V ERJ3GEYJ 102 V ERJ3GEYJ 823 V ERJ3GEYJ 471 V ERJ3GEYJ 122 V ERJ3GEYJ 471 V ERJ3GEYJ 391 V ERJ3GEYJ 102 V ERJ3GEYJ 823 V ERJ3GEYJ 152 V 1 5 kQ ERJ3GEYJ 224 V 220 ERJ3GEYJ 223 V 22 2 2 56 0 oi 470 Q 1 82 470 0 1 2 470 0 390 0 1 82 P S THERMISTOR NTCCF2012 3NH 153KC T S RESISTOR S TRIMMER S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S TRIMMER S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR
35. 750000130 S DIODE DA204U T107 7030003680 ERJ3GEYJ 104 V 100 1790001280 S DIODE MA111 TX ANI only 7030003680 ERJ3GEYJ 104 V 100 1710000870 S DIODE HVU131TRF 7030003680 ERJ3GEYJ 104 V 100 1790001280 S DIODE MA111 TX TWN only 7030003300 S RESISTOR 680 V 68 Q 1790001280 S DIODE 111 SEA THA CSA CSA 1 TWN ANI 7030003410 S RESISTOR ERJ3GEYJ 561 V 560 Q SEA THA CSA CSA 1 TWN ANI 2020001300 XTAL FL 251 30 850 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 2020001270 450 ITA USA S Surface mount UNIT ORDER ORDER SS mar A 7030003480 7030003290 7030003480 7030003400 7030003440 7030003670 7030003400 7030003450 7030003400 7030003390 7030003440 7030003670 7030003460 7030003720 7030003600 7510000890 7030003580 7310002760 7030003570 7030003770 7030003750 7030003640 7030003710 7030003710 7030003540 7030003470 7030003800 7030003200 7030003570 7030003680 7030003320 7030003570 7030003710 7030003750 7030003560 7030003800 7030003640 7030003690 7030003440 7030003460 7030003560 7310002600 7030003580 7030003440 7030003470 7030003520 7030003720 7030003570 7030003200 7030003200 7030003680 7030003400 7030000340 7030003440 7030003520 7030003520 7030003520 7030003520 7030003620
36. AMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TRIMMER S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 102 V ERJ3GEYJ 220 V 1 1 1 2 C1608 CH 1H 070D T A C1608 CH 1H 020 C1608 CH 1H 180J T A C1608 CH 1H 070D T A C1608 CH 1H 220J T A C1608 CH 1H 040B T A C1608 CH 1H 150J T A C1608 JB 1H 102K T A C1608 JB 1H 102 C1608 JB 1H 102K T A C1608 CH 1H 560J T A C1608 JB 1H 102 C1608 JB 1H 102K T A C1608 CH 1H 330J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A ECEV1CA470SP C1608 CH 1H 150J T A C1608 JB 1H 102 C1608 JB 1H 102 C1608 CH 1H 270J T A C1608 JB 1H 102K T A C1608 CH 1H 330J T A C1608 JB 1H 102K T A C1608 CH 1H 180J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A ECST1VY104R ECST1CY155R C1608 JB 1H 102K T A C1608 CH 1H 020 C1608 JB 1H 102 C1608 JB 1C 104KT N C1608 CH 1H 390J T A C1608 CH 1H 220J T A C1608 CH 1H 040B T A C1608 CH 1H 100D T A C1608 JB 1H 102 CTZ3S 20C WI PF C1608 JB 1H 102 C1608 CH 1H 050B T A C1608 JB 1H 102 C1608 JB
37. C1608 CH 1H 820J T A C1608 CH 1H 150J T A C1608 JB 1H 102 C2012 JB 1 224 ECST1CY105R C1608 JB 1H 102 C1608 JB 1 104KT N C1608 1H 330J T A C1608 1H 470J T A ECST1CY685R CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR HSJ1122 010010 HSJ1456 01 220 HEC2711 01 020 PI28A 02M IMSA 9230B 1 05Z080 T LCD S LED S LED S LED LM 1462B LNJ310M6URA LNJ310M6URA LNJ808R8ERA MICROPHON KUC3523 040245 S SWITCH JPM1990 2013R S JUMPER S JUMPER ERJ3GE JPW V ERJ3GE JPW V PCB 5193B LCD CONTACT SRCN 1922 SP N W ANI only VCO BOARD ORDER SST 1530002920 S TRANSISTOR 25 4226 2 R25 S TRANSISTOR 25 4226 2 R25 S TRANSISTOR 25 4226 2 R25 1530002920 1530002920 1720000370 1790000620 6200006670 6130002760 6200004480 7030003610 7030003340 7030003360 7030003540 7030003540 7030003360 7030003320 7030003460 4030006860 4030009500 4030006860 4030006860 4030009510 4030009510 4030006860 4030009510 4030007060 4030006860 4030006860 4030007160 6910010840 910050691 VR BOARD ORDER SS es S VARICAP S DIODE S COIL S COIL S COIL S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC CONNECTOR PCB 7210002950 VARIABLE 4030006860 910050701 S CERA
38. ELCH CIRCUIT A squelch circuit cuts out AF signals when no signals are received By detecting noise components in the AF signals the squelch switches the analog switch A portion of the AF signals from the FM IF IC IC2 pin 9 are applied to the active filter section IC2 pin 8 where noise components are amplified and detected with an internal noise detector The squelch input level adjustment pot R92 is connected in parallel to the active filter input pin 8 to con trol the input noise level The trigger circuit converts the detected signals to a HIGH or LOW signal and applies this from pin 13 to the CPU 1 8 pin 19 as the NOIS signal When the CPU receives a HIGH level NOIS signal the CPU controls the RMUT line to cut the AF signals at the analog switch IC IC4 At the same time the AFON line controls the AF regulator circuit Q15 Q16 to cut out the VCC power source for the AF power amplifier IC5 e Analog switch IC4 DET signal RMUT signal to pins 9 10 H5 via IC3d to the VOL control MIC signal from IC3d MMUT signal R5C to the VCO circuit for modulation circuit Current detector circuit VCC 2 lt signal from PLL Q2 SS aaa m mm mm UE mE Emm lt lt my 1 1 1 1 1 1 1 1 control circuit 4 2 TRANSMITTER CIRCUITS 4 2 1 MICROPHONE AMPLIFIER CIRCUIT
39. Fe 2 2 UNIT 022 4 4 053 El 5 Con c ae 88 SE B k T a 1 690 2504226 082 uH M EE IS C 25 1201 47 uH uPD3140GS I 47k R266 777 777 777 LLL DN R220 248 0 001 I 24 x R181 R 25 220k L 0 01 100 k 232 0 001 8 15 SA 6 001 TTT Rere cos a 025 a 1 ie SEC XP6401 mme C176 ES R213 291988 T 150 k 0 1 I gt 2 GISIS S 2SC4081 te 56 C10 E 33p 0 001 14 3 nH at op Toi sii 47 Q2 C205 KUC3523 040245 15 22 AW SES D3 T L 130 2SK3074 0 001 NS E Slam fr Nvcoour D zi Kn lt 15k ERA S5 Tk dq D I 6 023 23225222 008553355533 LIL D GND 025 Rie Tu D 2 147k 149 96 4081 EET F eos eee eee 27 270 15 R7 C298 R5 51 I 221 10k Oo Qui EE alco R32 SHIFT J R9 330 33 47 L L JPM1990 2013R Q40 6 330 k 0 001 D Dn np n m n oes moe R205 R155 47k 56 T XP1501 C161 I S 81250PG PD R218 R219 D14 YN mpoadnanaan 15k 470 y O1 R139 0 01 i Zei 25077 oN R240 C28 l 4 7k C230 du 1 100 0 001 25 3075 M is Q36 047 150 Hr e 07V 1 470 EUR UK 1 RX OV C29 Le 28292 Lor Lcd 25C4081 m DS1 22361 Q7 ITA USA J 0 19 001 R137 oH LM 146
40. JRE 39NG F 6200006990 S COIL ELJRE 56NG F 6200005720 S COIL ELJRE 33NG F d 108 CIO i al al al al al L 109 NO Ft O 1560001060 S FET 25 3075 121 1560001100 5 25 3074 121 1530000371 S TRANSISTOR 25 3356 R25 T2B 1530002560 S TRANSISTOR 2SC4403 3 TL 1530002920 S TRANSISTOR 25 4226 2 R25 1590002160 S TRANSISTOR XP6401 TX 1560000800 S FET 2SK360IG TR D E 1560000800 S FET 2SK360IG TR D E 1530002600 S TRANSISTOR 25 4215 TE85R 1520000650 S TRANSISTOR 2SB1201 S TL 1590001190 S TRANSISTOR XP6501 TX AB 1520000430 S TRANSISTOR 2881462 1520000650 S TRANSISTOR 2SB1201 S TL 1590001190 S TRANSISTOR XP6501 TX AB 1510000670 S TRANSISTOR 28 1588 TE85R 1510000670 S TRANSISTOR 28 1588 TE85R 1520000460 S TRANSISTOR 25 1132 7100 1530002280 S TRANSISTOR 25 4081 7107 S 1530002280 S TRANSISTOR 25 4081 107 5 6200003640 S COIL MLF1608K 100K T 1520000460 S TRANSISTOR 25 1132 7100 6200006980 S COIL ELJRE R10G F 1530002280 S TRANSISTOR 25 4081 7107 S EUR UK ITA USA 1530002920 S TRANSISTOR 25 4226 2 R25 1590000660 S TRANSISTOR DTC144TU T107 1590001070 S TRANSISTOR UN521D TX 7030005320 S RESISTOR 816 103 10 1530002280 S TRANSISTOR 25 4081 7107 S 7030005390 S RESISTOR RR0816P 102 D 1 1560000540 S FET 25 880 TE85R 7030003280 S RESISTOR ERJ3GEYJ 470
41. MIC HVU350TRF MA77 TX ELJRE 68NG F LB 312 MLF1608D R82K T ERJ3GEYJ 273 V ERJ3GEYJ 151 V ERJ3GEYJ 221 V ERJ3GEYJ 682 V ERJ3GEYJ 682 V ERJ3GEYJ 221 V ERJ3GEYJ 101 V ERJSGEYJ 152 V 27 kQ 150 220 Q 6 8 kQ 6 8 kQ 220 Q 100 9 1 5 kQ N lt C1608 JB 1H 102K T A C1608 CH 1H 0R5B T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 010B T A C1608 CH 1H 010B T A C1608 JB 1H 102K T A C1608 CH 1H 010B T A C1608 CH 1H 270J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 181J T A IMSA 9230B 1 05Z057 T B 5195A RV 312 RK0971110 C1608 JB 1H 102K T A B 5196A S Surface mount SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7 1 CABINET PARTS CHASSIS PARTS CHASSIS PARTS ORDER ORDER reve E s 6510020350 2510000960 8010017200 8210014430 8210014340 8210014330 8610010420 8930048080 8930042070 8930042050 8930042090 8930042080 8930011900 8930042060 8210014380 8310040680 8930042680 8930042790 8930047930 8930047940 8930047950 8830001250 8810000100 8810009510 8810009510 connector 148 Speaker 6 500 26 2078 Chassis 1902 Front panel 1922 PTT panel 1922 Contaci base Knob 261 1922 10 A 1922 cap 1922 DC 1922 Plus terminal 1922 Minus terminal SP net 573 1922 holder 1922 Reflector 1922 Window plate 1902 seal 1902
42. Q8 D6 The oscillated signal is amplified at the buffer amplifiers Q5 Q6 and then applied to the PLL IC IC1 pin 2 The PLL IC contains a prescaler programmable counter pro grammable divider phase detector and charge pump etc The entered signal is divided at the prescaler and program mable counter section by the N data ratio from the CPU The divided signal is detected on phase at the phase detector using the reference frequency If the oscillated signal drifts its phase changes from the ref erence frequency causing a lock voltage change to compen sate for the drift in the oscillated frequency e PLL circuit VCO board A portion of the VCO signal is amplified at the buffer amplifi er Q4 Q6 and is then applied to the receive 1st mixer or transmit buffer amplifier circuit via the T R switching diode D3 D4 4 4 POWER SUPPLY CIRCUITS VOLTAGE LINE Line Deseription _ BATT The voltage from the attached battery pack case same voltage as the line controlled by the PWR VOL control Common 5 V converted from the VCC line by the reference regulator circuit IC6 The output volt age is applied to the CPU 8 and the 5V regu lator circuit etc Common 5 V converted from the VCC line at the 5 V regulator circuit Q18 Q19 using the CPU5 line voltage for reference Transmit 5 V converted from the VCC line at the T5 regulator circuit Q22 Q40 Receive 5 V converted f
43. R ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST SENSITIVITY 1 Operating 146 000 MHz MAIN A a digital volt Maximum level MAIN Connect SSG to the antenna con meter check point 5 sequence nector and set as L18 L19 Frequency 146 000 MHz Level 1 uV 107 dBm Modulation 1 kHz Deviation 3 5 kHz e Receiving 1 Operating freg 146 000 MHz Front LCD Connect the JIG to the SP jack panel Ge hold the Connect 550 to the antenna con nector itch Frequency 146 000 MHz Level 0 5 uV 113 dBm Modulation OFF Receiving S METER 2 Set SSG output level for the S SSG Output level 0 89 0 28 uV Verify meter to S3 3 dot 106 to 118 dBm R92 SQUELCH 1 Operating freq 146 000 MHz Spea At the point SQL set Auto ker where the AF Connect an SSG to the antenna con signals just nector and set as disappear Frequency 146 000 MHz Level 0 1 127 dBm Modulation 1 kHz Deviation 5535 kriz Receiving This output level of the standard signal generator 550 is indicated as SSG s open circuit e MAIN unit 8 adjustment R92 Squelch adjustment S Sensitivity check point Bottom view Top view SECTION 6 PARTS LIST MAIN UNIT MAIN UNIT ORDER ORDER SS ona ENE enero 1130007610 uPD3140GS E1 098 6050009420
44. S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR ERJ3GEYJ 153 V 15 RV 152 RHO3A3AJ4X0HA 223 ERJ3GEYJ 123 V 12 ERJ3GEYJ 564 V 560 kQ ERJ3GEYJ 394 V 390 kQ ERJ3GEYJ 473 V 47 kQ ERJ3GEYJ 184 180 ERJ3GEYJ 184 180 ERJ3GEYJ 682 V 6 8 ERJ3GEYJ 182 V 1 8 ERJ3GEYJ 105 V 1 ERJ3GEYJ 100 V 10 0 ERJ3GEYJ 123 V 12 kQ ERJ3GEYJ 104 100 ERJ3GEYJ 101 V 100 0 ERJ3GEYJ 123 V 12 kQ ERJ3GEYJ 184 180 ERJ3GEYJ 394 390 ERJ3GEYJ 103 10 ERJ3GEYJ 105 1 ERJ3GEYJ 473 47 ERJ3GEYJ 124 120 ERJ3GEYJ 102 1 ERJ3GEYJ 152 1 5 ERJ3GEYJ 103 10 RV 110 RHO3A3AS4X0AA 473 ERJ3GEYJ 153 V 15 ERJ3GEYJ 102 V 1 ERJ3GEYJ 182 V 1 8 kQ ERJ3GEYJ 472 V 4 7 kQ ERJ3GEYJ 224 V 220 ERJ3GEYJ 123 12 ERJ3GEYJ 100 10 0 ERJ3GEYJ 100 10 0 ERJ3GEYJ 104 100 ERJ3GEYJ 471 470 MCR10EZHJ 470 471 ERJ3GEYJ 102 1 ERJ3GEYJ 472 4 7 ERJ3GEYJ 472 4 7 ERJ3GEYJ 472 4 7 ERJ3GEYJ 472 4 7 ERJ3GEYJ 333 33 ERJ3GEYJ 104 100 a ERJ3GEYJ 224 220 ERJ3GEYJ 104 100 ERJ3GEYJ 10
45. el e Removing the MAIN unit 1 Remove the sealing rubber 2 Unsolder 2 points D and unscrew 1 nut 3 Unscrew 2 screws and 6 screws silver 2 mm to separate the chassis and MAIN unit 4 Remove the MAIN unit in the direction of the arrow black 2 mm x 2 y m OY O g a EX re Sealing rubber 7 B Nut Chassis MAIN unit SECTION 4 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 4 1 1 ANTENNA SWITCHING CIRCUIT Received signals passed through the low pass filter L1 L3 C1 C7 The filtered signals are applied to the 2 4 type antenna switching circuit D8 D32 L15 L16 C76 C78 The antenna switching circuit functions as a low pass filter while transmitting However its impedance becomes very high while D8 and D32 are turned ON Thus transmit signals are blocked from entering the receiver circuits The antenna switching circuit employs a M4 type diode switching system The passed signals are then applied to the RF amplifier cir cuit 4 1 2 RF CIRCUIT The circuit amplifies signals within the range of frequen coverage and filters out of band signals The signals from the antenna switching circuit pass through a bandpass filter D10 L26 after being amplified at the RF amplifier Q29 The filtered signals are amplified at another HF amplifier Q12 then applied to the 1st mixer circuit after out of band signals are suppressed at the band
46. n 16 and is mixed with the 2nd LO signal to be converted to a 450 kHz 2nd IF sig nal The FM IF IC contains the 2nd mixer limiter amplifier quad rature detector and active filter circuits A 30 4 MHz 2nd LO signal is produced at the PLL circuit by doubling it s reference frequency The 2nd IF signal from the 2nd mixer IC2 pin 3 passes through a ceramic filter Fl2 to remove unwanted hetero dyned frequencies It is then amplified at the limiter amplifier IC2 pin 5 and applied to the quadrature detector 1 2 pins 10 11 to demodulate the 2nd IF signal into AF signals 4 1 5 AF CIRCUIT The AF amplifier circuit amplifies the demodulated AF signals to drive a speaker AF signals from the FM IF IC IC2 pin 9 are applied to the analog switch IC4 pin 1 via the AF filter circuit IC3b pins 6 7 The output signals from pin 11 are applied to the AF power amplifier IC5 pin 4 after passing through the VOL control VR board R1 2nd IF filter 450 kHz E Imes 1 K PLL 15 2 2 2 1136 US Ae IF from the IF NOIS signal to the CPU pin 19 SD signal to the CPU pin 98 signals from VOL control applied to the power amplifier circuit IC5 pin 4 to obtain the specified audio level The amplified AF signals output from pin 10 are applied to the internal speaker SP1 via the SP jack when no plug is connected to the jack 4 1 6 SQU
47. or key matrix Outputs the analog switch 1 4 con trol signal MMUT Low While DTMF or ANI signals are output Outputs the analog switch 1 4 con RMUT signal Low While muted 44 47 KRO KR5 Input ports for key matrix Outputs R5 regulator control signal Low While receiving Output S5 regulator control signal Low While power is ON Outputs transmit output power select 50 TXC HIGH or LOW signal Low HIGH power is selected 51 rer Input ports for the switch High While PTT is pushed Outputs LCD backlight control signal LIGHT High When backlighting is ON Outputs the regulator circuit control signal for the AF amplifier 93 AFON High While AF amplifier is activat ed 16 17 6 A A N Port D ipti nana escription Output ports for tunable bandpass filter control 54 60 T4 PWR signal while receiving reference signal for the APC circuit while transmitting NN Outputs beep audio signals Outputs DTMF signals while pushing the keypad during 94 PTT Input port for the PTT switch Input port Input port for the PTT switch the PTT switch TEMP Input port for internal temperature detection Input port for the S meter signal from the FM IF IC 2 12 Input port for overvoltage detection 100 VIN rom the connected power supply battery pack SECTION5 ADJUSTMENT PROCEDURES 5 1 PREPARATION
48. pass filter D11 D12 L18 L19 C92 C94 C96 C236 010 012 employ varactor diodes that track the bandpass fil ters and are controlled by the T4 PWR signal from the CPU IC8 pins 54 59 These diodes tune the center frequency of an passband for wide bandwidth receiving and good image response rejection 4 1 3 1ST MIXER AND 1ST IF CIRCUITS The 1st mixer circuit converts the received signal to a fixed frequency of the 1st IF signal with a PLL output frequency By changing the PLL frequency only the desired frequency will pass through a crystal filter at the next stage of the 1st mixer 2 IF AND DEMODULATOR CIRCUITS Squelch level adjustment pot R92 filter FM detector 9 10 AF signal DET l d signals from the RF circuit are mixed at the 1st mixer Q13 with a 1st LO signal coming from the VCO circuit to produce a 30 85 MHz 1st IF signal The 1st IF signal is applied to a crystal filter F11 to suppress out of band signals The filtered 1st IF signal is applied to the IF amplifier Q14 then applied to the 2nd mixer circuit IC2 pin 16 4 1 4 2ND IF AND DEMODULATOR CIRCUITS The 2nd mixer circuit converts the 1st IF signal to a 2nd IF signal A double conversion superheterodyne system which converts receive signal twice improves the image rejection ratio and obtains stable receiver gain The 1st IF signal from the IF amplifier is applied to the 2nd mixer section of the FM IF IC IC2 pi
49. rom the 5 V line at the R5 regulator circuit Q21 The regulated voltage is applied to the receiver circuits Common 5 V converted from the 5V line by the S5 regulator circuit Q20 The same voltage as the 5V line for the optional HM 75A or HS 51 through a resistor R132 to transmitter circuit to 1st mixer circuit D4 Phase Programmable Prescaler detector counter 30 4 MHz signal PLST to the FM IF 17 xD Programmable Shift register I4 SCK divider 50 he 15 2 MHz 4 5 PORT ALLOCATIONS CPU 8 Port name Input port for CTCSS signal for decod ing uM RESET Input port for the reset signal port Input port for the reset signal the reset signal Output reference oscillator for the eo CPU control signal Output clock signal to the PLL IC1 and EEPROM ICs etc Description Input port for the data signals from EEPROM etc data signal to the PLL IC1 EEPROM ICs etc Input port for PLL unlock signal from UNLK the PLL IC IC1 High During unlock CLIN Input port for the cloning signal CLOUT Output port for the cloning signal PLST Outputs strobe signals to the PLL IC 1 NOIS Input for Signals pulse type from the FM IF IC2 13 CONT Outputs LCD contrast control signal High When normal level is selected 36 41 KS0 KS5 Output ports f
50. rt any circuits or electronic parts An insulated tuning tool MUST be used for all adjustments DO NOT keep power ON for a long time when the transceiver is defective DO NOT transmit power into a signal generator or a sweep generator ALWAYS connect a 40 dB 50 dB attenuator between the transceiver and a deviation meter or spectrum analyser when using such test equipment 8 READ the instructions of test equipment thoroughly before connecting equipment to the transciver WD SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION 5 INSIDE VIEWS DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPTION EMT 4 1 TRANSMITTER CIRCUITS tutem anas etude mp paxil dE 4 2 AAA 2 8 POWER SIPPLYGOIROUIDD I 4 3 CPU PORT ALLOCATIONGS 4 4 ADJUSTMENT PROCEDURES PREPARA TONI artis SEN PLL AND TRANSMITTER ADJUS TIMEN HE 9 2 RECEIVER ADJUSIMENTI E 5 3 PARTS LIST MECHANICAL PARTS AND DISASSEMBLY SEMI CONDUCTOR INFORMATION BOARD LAYOUTS BLOCK DIAGRAM VOLTAGE DIAGRAM SECTION 1 GENERAL Frequency coverage Mode Current drain at 9 6 V DC Frequency stability Usable temperature range e Antenna connector No of memory channels Acceptable power supply Frequency resolution Dimensions Projections not included e Weight with BP 199

IC-t2e-t -- Service Manual

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