M-150 Plus Service Manual
Contents
1. 352. England Frequency CEPT Frequency CH Frequency MHz Modulation CH Frequency MHz Modulation 1 27 60125 FM 1 26 965 FM 2 27 61125 FM 2 26 975 FM 3 27 62125 FM 3 26 985 FM 4 27 63125 FM 4 27 005 FM 5 27 64125 FM 5 27 015 FM 6 27 65125 FM 6 27 025 FM 7 27 66125 FM 7 27 035 FM 8 27 67125 FM 8 27 055 FM 9 27 68125 FM 9 27 065 FM 10 27 69125 FM 10 27 075 FM 11 27 70125 FM 11 27 085 FM 12 27 71125 FM 12 27 105 FM 13 27 72125 FM 13 27 115 FM 14 27 73125 FM 14 27 125 FM 15 27 74125 FM 15 27 135 FM 16 27 75125 FM 16 27 155 FM 17 27 76125 FM 17 27 165 FM 18 27 77125 FM 18 27 175 FM 19 27 78125 FM 19 27 185 FM 20 27 79125 20 27 205 21 27 80125 21 27 215 22 27 81125 22 27 225 23 27 82125 23 27 255 24 27 83125 24 27 235 25 27 84125 25 27 245 26 27 85125 26 27 265 27 27 86125 27 27 275 28 27 87125 28 27 285 29 27 88125 29 27 295 30 27 89125 30 27 305 31 27 90125 31 27 315 32 27 91125 32 27 325 33 27 92125 33 27 335 34 27 93125 34 27 345 35 27 94125 35 27 355 36 27 95125 36 27 365 37 27 96125 37 27 375 38 27 97125 38 27 385 39 27 98125 39 27 395 40 27 99125 40 27 405 24 Customer INTEK NTEK Frequencies for PL band Polan
3. gt S LOCAL R175 100 1 2W R162 for 150 only M 760 open C156 C157 0 1 47 16E C113 470 x 8177 lt R27 R176 x 4 2 0 100 1 2W 0 1 50 amp 042 c1 163 68 12P 68P E L21 9 2 64 7 1 2 Qui22 RI L1 LHO61 a Sed C165 1 5 Qe 135 3106217 gt C155 R172 220 16E amp 100 1 2W I J1 NA 33 161 EXT SPK 1000 16E L4 42070517 017 C30 3205851 R116 3 9K 0 047 D C154 1000 16E SPEAKER1 31 E 8 1W C134 Hoe 0 01 a 22 16T 182 1000 16 1000 0517 Reg 13 8 47 16 8552 LED9 e DZ2 R34 C118 3 3K 0 1 R36 C35 1 5K 100 16 o RI D MODEL 6146 145 mso H M760 LED8 PCENA RESINA 2 R105 NA E eer one ROS NA R540 E e 2K 10 16 R93 54 26 55 p 020 ET o R70 ea 56 EXP ON OFF 5 10 16E 10 1 2W d VCO SLOT RB R65 3 9K L LisP4 1 SP9 10 R174 3 9 sP1 1 5 10_10 C85 100 16 LISP2_1 5 8 10 K R546 100 9 9 DW LISP5_1 SP11_1 R
4. cle 8 0 8 Oy Oe Ah O L10 R64 En m E D10 B ag Jue 26 YR3 1 OA e RE g SEL1 8 ud e jr els Y UTEM C113 L20 a ge e 29 4 146151 inns F x Q Na 904 880 alt 157 TE T TE poll us m a 154 2103 827 Fev ds C181 mcs ER 5 Dio LOW POWER Tert ab em 2 i a e RV8 70 ode 805580 gt AIL jte zx 5 oa E mmi mr 90 134 T POWER E cho 08 z aa Cil RV e 2 28 28 T ae RV7 16 A o Ei E C51 on Ge SQ ADJ a IC3 op NS 102 a IC6 Sor 0260500 11 092W 05 6 50 DOCE Eis ma 15 16 17 18 19 20 21 144 R131 R138 p2 150 760 1062 3 R66 n 1 C256 47 VCO_VDD VCO TEST R405 C411 6406 1109047 C412 C413 0 01 68K 0 068 100K n 270P C502 10 16T C414 68PF C415 NC R409 VCO TEST 100K C416 15P FT C417 15P 421 C422 R414 39P 6P 33K RI BAND2 L29 6 8uH AX 0403 LOCAL BAND1 gt R413 56K B _TX
5. 6 27 025 46 26 615 7 27 035 47 26 625 8 27 055 48 26 635 9 27 065 49 26 645 10 27 075 50 26 655 11 27 085 51 26 665 12 27 105 52 26 675 13 27 115 53 26 685 14 27 125 54 26 695 15 27 135 55 26 705 16 27 155 56 26 715 17 27 165 57 26 725 18 27 175 58 26 735 19 27 185 59 26 745 20 27 205 60 26 755 21 27 215 61 26 765 22 27 225 62 26 775 23 27 255 63 26 785 24 27 235 64 26 795 25 27 245 65 26 805 26 27 265 66 26 815 27 27 275 67 26 825 28 27 285 68 26 835 29 27 295 69 26 845 30 27 305 70 26 855 31 27 315 71 26 865 32 27 325 12 26 875 33 27 335 73 26 885 34 27 345 74 26 895 35 27 355 75 26 905 36 27 365 76 26 915 37 27 375 77 26 925 38 27 385 78 26 935 39 27 395 79 26 945 40 27 405 80 26 955 Model No M150 Plus Customer INTEK NTEK Frequencies for D2 band Germany 40CH FM 4W 12CH AM IW CH Frequency MHz Modulation 1 26 965 2 26 975
6. 2 100 12 120 CH J CH J 1 15 CH J 150PF B K 0 015UF CH 1 18PF K 0 0022UF K 0 022uF 0 022UF XTR 2 2UF CH 1 27PF CH J 270PF CH J 39PF CH C 4PF 59 ND KK DPD D WC 41 24 16 N e e wW R88 R5 R72 147 R153 R155 R161 R62 R94 R55 R6 R56 R73 R151 R160 R2 R104 R135 R87 044 045 046 014 026 029 034 112 C6 9 425 C40 C41 C42 C133 C171 C38 C81 C10 C182 C121 C25 C45 C47 C91 C106 167 170 C19 C20 C24 C27 C34 C36 C58 C110 C135 C145 C146 C120A C173 C203 C212 C39 C149 C503 C175 C119 C86 C89 C97 C63 C424 C114 427 C84 C15 C21 C26 C28 C49 C55 C57 C136 C147 C153 C166 C169 C148 C172 C180 C192 C127 C130 C118 C207 C21 C131 C208 C209 C93 C161 C200 C201 C202 C210 C87 C103 C104 C109 C138 C139 C466 C467 C468 C502 C213 C150 C151 C125 C56 C214 417 13 62 416 65 14 413 160 C46 C64 C215 C204 C216 C176 C412 C428 C421 C429 28 Customer INTEK 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 KCC 470FRJNPOB KCC 472FRKB
7. RV5 RV7 IC3 D Squelch does not Replace the defective work components Re adjust Model No M150 Plus Customer INTEK Rev No A INTEK Defective microphone Poor audio output and Replace Replace the defective modulation microphone amplifier defective components components 103 Defective microphone Replace Replace the No modulation connector components Defective ALC circuit defective components D8 D9 LCD meter does Defective D11 D22 Defective IC5 Defective e Replace Replace not work RV2 RV6 Replace LCD display does Defective RED wire fuse Defective IC5 not work Replace Replace Channel selector daas Defective 105 Replace EMG GS T9 Defective EMG SW Defective IC5 Replace Replace does not work TEST EQUIPMENT SETUP A TXtest equipment setup Spectrum Power Analyzer Supply Modulation Wattmeter Radio Meter U U T Audio Gen Oscilloscope Frequency Counter a Q Distortion Meter Voltmeter Model No M150 Plus Customer INTEK Rev No A INTEK B RX test equipment setup SINAD Meter RF Signal Generator Distortion 8 ohm Meter loading Oscilloscope U U T device under test Alignment Procedure 41 Adjust 4 1 1 VCO Voltage Adjust Test point connect to multi meter set UUT enter test mode Press
8. 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 AM 31 27 315 AM FM 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 22 Customer INTEK NTEK Model No M150 Plus Frequencies for CE band CEPT 40CH FM 4W CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 23 Customer INTEK INTEK Frequency For UK Band England 40CH FM 4W CEPT 40CH 4W Model No M150 Plus
9. 31 Model No M150 Plus Customer INTEK Voltage Chart TRANSISTOR Ref Pin TX RX Ref Pin TX RX Q2 Q32 0 0 25 211 MMBTRC104SS 0 6 0 3 5 0 02 037 0 0 2SK211 Y MMBTRC104SS 0 5 7 9 2 8 0 014 040 0 7 0 9 38805 15045 0 0 0 6 1 016 25 2314 018 5 3265 019 15045 028 MMBTSC3265Y oO 32 Customer INTEK INTEK Ref D1 ax 5 px Model No M150 Plus ax 5 KDS160 A K A 8 2 5 5 02 0 5 7 1 K 0 6 1 KDS160 1 261 ON m 1N4004 gt 134004 Z gt KDS160 E m NIN 22 2 2 KDS160 gt N gt KDS160 gt o TB31202F 1 2 3 4 5 6 7 8 33 Customer INTEK INTEK Model No M150 Plus IC3 AZ324M Rev No A 34 Model No M150 Plus Customer INTEK Rev No A INTEK IC5 TMP86CH21 DAD NM BR
10. 50Hz on frequency counter The UUT turn to EU CH19 check the TX carrier frequency should 27 185000 300Hz 5 TX harmonics adjust and checking turn to FM 19 adjust L24 for 279 harmonic 36dBm below 4 3 2 TX Signal Meter Indicator Alignment 1 UUT set to AM 19 input of power meter to antenna input terminal 2 Set to TX mode adjust the RV2 for 4 characters displayed at the TX signal strength of the LCD display 4 3 3 TX modulation Deviation Alignment Model No M150 Plus Customer INTEK Rev No A INTEK 4 3 4 UUT set to FM I2 CH19 input of power meter to antenna input terminal Input MIC socket to the audio frequency signal generator output terminal Mic Gain set to maximum Compander set to Off Set audio frequency signal generator FREQ 1000Hz Output level 5 0mVrms Note Should be add one 10uF capacitor in series between the AF signal O P and UUT input Set UUT to TX mode adjust RV1 for 1 6KHz deviation on modulation meter Decrease the AF output level Check the 1 2KHz deviation modulation sensitivity should be between 8 15 mV Compander set On Check the 1 2KHz deviation modulation sensitivity should be between 3 8 mV Turn the AF output level for 1 2KHz deviation on modulation meter check the modulation distortion must be less than 5 0 on the audio distortion meter for Compander On and Off Set UUT to AM mode Set audio frequency signal generator FREQ 1000Hz Output
11. 3 26 985 4 27 005 AM FM 5 27 015 AM 6 27 025 AM FM 7 27 035 AM FM 8 27 055 AM FM 9 27 065 AM FM 10 27 075 11 27 085 AM FM 12 27 105 AM FM 13 27 115 AM FM 14 27 125 AM FM 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 21 Model No M150 Plus Customer INTEK INTEK Frequencies for EU band Europe 40CH FM 4W 40CH AM 1W CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235
12. CH J 68PF 0 0068UF 0 068UF J 82PF 2515 12V 18 471103 18X221J03 OHM 100K OK OK 2 0603 TK 22 15 ND WR Mm 256 39 12 C23 C17 C18 C22 C30 C105 C129 C33 C54 C96 C108 C53 C422 C426 C414 C423 C52 C411 C48 C115 D1 D2 D7 D8 09 D14 D15 D16 D17 D18 D19 D20 D25 D402 D403 L109 TH2 TH4 D21 R128 R203 C205 R19 R54 R205 R213 R178 R171 R172 R175 R176 R3 R35 R69 R80 R99 R114 R412 R416 R207 R91 R163 R156 R157 R197 R129 RY R23 R53 R82 R124 R134 R211 R182 R184 R185 R193 R187 R165 R166 R41 R192 R191 R137 R173 R208 R132 R177 R46 R77 R78 R79 R90 R96 R118 R148 R32 R103 R210 R409 R411 R406 R415 R121 R206 R188 R112 R68 R36 R81 R92 R101 R18 R37 R51 R130 R164 R123 R142 R113 R26 R83 R84 R85 R86 R119 R199 R200 R152 R52 R125 R20 R169 R33 R67 R93 R102 R168 28 1 R408 R21 R27 R38 R39 R158 R140 R11 R159 R12 R16 R117 29 Customer INTEK 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 KCR 213B KCR 303B KCR 332B KCR 333B
13. KCR 334B KCR 391B KCR 392B KCR 393B 470 KCR 471B KCR 472B KCR 473B 474 KCR 479B KCR 561B KCR 562B KCR 563B KCR 681B KCR 682B KCR 683B KCR 821B KCR 822B KCR 823B KCR 824B 15045 38755 38805 10155 10255 10455 11155 11255 KCT MMBTSC3265Y 25 211 KED ZSMM5Z6V8 24 04 KEIC AZ324M KEIC DBL5020V KEIC KIA7042F KEIC KIA78LO5F KEIC SL5019 KEIC TB31202FN KEIC TC4066BF 385 1062 1 KED LC124 Model No M150 Plus RES RES RES RES RES RES RES RES RES RES RES CHIP 1 16W 27 CHIP 1 16W 30 CHIP 1 16W 3 CHIP 1 16W 33 CHIP 1 16W 33 CHIP 1 16W 390 CHIP 1 16W 3 CHIP 1 16W 39 CHIP 1 16W 47 CHIP 1 16W 470 CHIP 1 16W 4 RES CHIP 1 16W 47 RES RES RES RES RES RES RES RES RES RES CHIP 1 16W 47 CHIP 1 16W 4 7 CHIP 1 16W 560 CHIP 1 16W 5K6 CHIP 1 16W 56 CHIP 1 16W 680 CHIP 1 16W 6 CHIP 1 16W 68 CHIP 1 16W 820 CHIP 1 16W 8 RES CHIP 1 16W 82 RES CHIP 1 16W 82 TR CHIP PNP 15 TR CHIP NPN KTC38 TR CHIP NPN KTC38 TRANSISTOR MMBTRC1 TRANSISTOR MMBTRC1 TRANSISTOR MMBTRC1 TRANSISTOR MMBTRC1 TRANSISTOR MMBTRC1 TRANSISTOR MMBTSC3 FET 25 211 TOSHI MM5Z6V8 SEMTECH AT24C04N 10SI 2 IC AZ324 SOIC 14 Q IC DBL5020V COMPAN IC KIA7042F VOLTAG
14. M 760B1S M 760B1SB KCC 102FRJNPOB KCC 103FRKBB KCC 104DRKBB KCC 120FRJNPOB KCC 122FRKBB KCC 150FRJNPOB KCC 151FRJNPOB KCC 200FRJNPOB KCC 201FRJNPOB KCC 271FRJNPOB KCC 333DRKBB KCC 390FRJNPOB 409 KCC 470FRJNPOB KCC 473DRKBB 47 KCC 509FRCNPOB KCC 680FRJNPOB KCD KDS160 KCR 000B Model No M150 Plus COIL VARIABLE 0 20 COIL VARIABLE 0 30 COIL FIXED 100UH FIXED 1MH 1090 COIL FIXED 1 5UH A COIL FIXED 6 8UH COIL FIXED 6 8UH INDUCTOR LGA0415 7 RES MX FILM 2W 5 RES MX FILM 1W 5 RES C FILM 1 2W 5 RES SEMI KVSF637A RES SEMI KVSF637 RES SEMI KVSF637 RES SEMI KVSF637 RES C FILM 1 4W 5 RES C FILM 1 4W 5 RES C FILM 1 4W 5 RES SEMI KVSF637 RES C FILM 1 2W 5 RES C FILM 1 2W 5 RELAY TRKM 78F D TRANSISTOR 2SL2314 TRANSFORMER CHOKE BW 0903 BAN WO TRA CRYSTAL 10 24DMHZ CRTAL 4MZ 20PPM HC BASE MAIN PCB SMT BASE MAIN PCB SMT CAP CER CHIP 50V CAP CER CHIP 50V CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CER CER CER CER CER CER CER CER CER CER CER CER CER CER CHIP 16V CHIP 50V CHIP 50V CHIP 50V CHIP 50V CHIP 50V CHIP 50V CHIP 50V CHIP 16V CHIP 50V CHIP 50V CHIP 50V CHIP 16V CHIP 50V CAP CER CHIP 50V CAP CER CHIP 50V DIODE CHIP KDS160 RES CHIP 1 16W 0 UH 20 H 20 10 AL0307 102K LF 70704029 R5M B 5UH 12 OHM S 470 OHM S 10 OHM 1KOHM A
15. IC KIA78LOSF REGUL IC SL5019 IF SYSTE IC TB31202FN PLL IC 4066 ANA MCU TMP86CH21AUG 6 151 5x145 5 1 LCD SDM8B4359B HPB 3K OK 9K TK OK 8K 2K K OK 045 SOT 23 75S GR 80S SOT 23 0155 50123 0255 50123 0455 50123 1155 50123 1255 SOT23 265 50123 5 NER DIODE 7 EEPROM 4K UAD OP AMP DOR SOP E DETECTOR ATOR SOT 89 M SW UK2 6MM 05 FR 4 Or 4 NY KK Wr gt gt We e e e e e e Rev No A R13 R44 R45 R34 R133 R97 R15 R141 R414 R30 R170 R111 R40 R116 R65 R179 R174 R29 R47 R48 R407 R59 R198 R27A1 R7 R74 R95 R143 R24 R10 R17 R22 R58 60 R106 R122 R127 R49 R50 R89 R139 R98 R189 R194 R195 R196 R146 R190 R43 R201 R212 R105 26 1 R28 R61 R14 R214 R126 R100 R120 R413 R202 R57 R405 R433 R144 R136 R76 R209 R31 R167 R25 Q8 Q11 Q13 Q19 Q22 Q40 Q1 Q54 Q55 Q56 Q47 06 07 Q15 043 Q408 0411 0412 0404 0405 0406 012 023 09 031 032 037 038 039 052 053 025 030 036 010 018 020 024 027 028 035 041 042 02 03 074 075 103 109 102 106 IC4 Ul IC5 30 Customer INTEK 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 KED L111A KED L204R KESW 015 M 760B2S KC
16. channel UP key to select CHO1A of Poland Band in FM mode 1 Adjust IFT L17 for 1 0 0 1V on the Multi meter read and then checking CH40L of RU Band should be less than 3 8V and then check AM mode CHOIA gt 0 8V CHAOL 3 8 V 2 Set for TX MODE Check gt 0 8V CHIAD lt 3 8V CHI5D gt 0 8V CH21G lt 3 8V CH22G gt 0 8V CHAOL lt 3 8V 3 Turn to AM mode and repeat above item 2 42 RX Section Alignment and 4 2 1 Audio Distortion Adjust 1 UUT set to FM mode CH19 output of RF signal generator connect to TP2 Audio dummy load connect to EXT Speaker 8Q load Set S S G Freq 10 695MHz Mod 1 2KHz 1KHz Output level Squelch Volume set to minimum position volume control set to around middle position Adjust IFT L20 for maximum audio output and minimum distortion at the distortion meter distortion less than 5 Set volume control to maximum position audio output power shall be more than 3 Watts BN UUT set to AM mode 19 output of RF signal generator connect to TP2 Audio dummy load connect to EXT Speaker 280 load Model No M150 Plus Customer INTEK Rev No A INTEK p 8 9 10 Set S S G Freq 10 695MHz Mod 60 Fmod 1KHz Output level 1mV Squelch Volume set to minimum position volume control set to around middle position Adjust L5 for maximum audio output and minimum distortion at the disto
17. level 50mVrms Set UUT to TX mode adjust RV3 for 90 deviation on modulation meter Decrease the AF output level Check the 50 deviation modulation sensitivity should be between 8 15 mV Compander set On Check the 50 deviation modulation sensitivity should be between 3 8 mV Turn the AF output level for 60 deviation on modulation meter check the modulation distortion must be less than 5 0 on the audio distortion meter for Compander On and Off PA audio output checking 1 The UUT enter PA mode after long press ANL key Volume set maximum position for M 150 and the MIC gain set maximum position for M 760 1KHz audio input 2 Turn to TX mode the PA output must meet the DTS 5 0 TEST MODE DESCRIPTION Model Selection and International Band Select 6 For M 760 Press both keys of ANL amp Scan synchronously then turn on the DC power enter test mode Press the ENG key for Software version checking press the Channel Down key for LCD segments scanning checking For M 150 Press both keys of ANL amp DN synchronously then turn on the DC power enter test mode Press the ENG key for Software version checking press the Channel Down key for LED segments scanning checking RX amp TX parameter test Press the channel up key can select Germany CH41 26 565MHz 19 27 185 2 EU 22 27 225 2 and UK CHU40 27 99125MHz and RU CH40L EEP
18. 026 K1 AM FM Ko RB K302 ANL POWER 13 2V 5V SUPPLY QXXX 1st MIXER 92 05 RF ATTENUATOR 054 01 0408 0402 0411 UNLOCK DOUBLER 012 014 020 BX RX B SW TX B SW PLL IC 2 018 IC4 4 2 XF1 10 695MHZ S METER DRIVER 10 24MHZ 1 2 O RX B 2nd IF DEMODULATOR SQ CONTROL LIMITTER Q10 101 455kHz VOLTAGE COMPARATOR amp SQ TRIGGER WITH HYSTERESIS C 101 AM IF Q6 Q7 VR2 SQ CONTROL SQ CTRL 3 0 IC8 AGC CTRL VOLUME CONTROL IC3 C SPEAKER mi AM DETECTOR 05 SWITCH pM 96 Qu Q27 09 025 IC3 A IC3 B NEM MOD TRANS AM MOD ALC CONTROL 024 013 PRE DRIVER DRIVER RF AMP LPF Q15 Q16 Q17 TX REGULATER A 023 022 021 RV4 TX POWER Model No M150 Plus Customer INTEK Rev No A Frequencies Tables 760 Plus Specification LCD Display Legal Bands Italy 40CH AM FM 4W EI Italy 36CH AM 4W 12 Germany 80CH 4W 12CH IW DE Germany 40CH 4W 12CH AM IW D2 Europe 40 4W 40CH AM IW EU CEPT 40CH F
19. 10K A 100K A 22KOHM S 2 2 OHM 5 3K F 470 OHM A 47K S 4 7 OHM 750 OHM 12VDC S Z F NPN 19 226 NSFORMER CL 30PF BOTTOM CH J 0 001UF K 0 ODD ODD K 0 CH J 12PF B K 0 00120 CH J 15PF CH J 150PF CH J 20PF NPO J 200P CH J 270PF B K 0 033UF CH J 39PF CH C 4PF CH 1 47PF B K 0 047uF B K 0 047uF CH CH J 68PF KEC OHM 1 FNPF WDE 124 124 123 119 L1 L25 111 16 118 R75 R138 R70 RV3 RV1 RV4 RV2 RV7 R107 R71 R8 RV6 RV5 R64 R66 K12 K13 Q16 X2 C67 C3 C61 C83 C99 C126 C140 C8 C32 C82 C100 C132 C114 C156 C164 C163 C73 C165 C183 C124 C116 C75 C43 C77 C79 C78 C159 C92 C122 C101 C44 C142 C80 C76 C66 C95 C71 C88 C69 C70 C143 C1 C2 C74 D3 D4 11 012 013 022 D23 024 R149 27 Customer INTEK 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 11 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 KCR 101B KCR 102B KCR 103B KCR 151B KCR 152B KCR 154B KCR 183B KCR 221B KCR 222B KCR 213B KCR 471B KCR 474B 563 38755 38805 KCT MMBTSC3265Y M 760B1ST KCC T105EA
20. 220UF 220UF ATUF ATUF E300 695MHZ QUARTZ 55HTW FRONTER ENER DIODE 1K261 2295R IFT FT ET FT 10 AMP YD 4B R CORE COIL AIR CORE COIL WFD QTY 1 1 1 A NN BO i pant Rev No A Ref 120 11 VR2 VR3 VRASW MIC 120 16 VR1 1 0 08 MIC VRI VR2 VR3 4 1 0 1 SW L 0 03 VR2 VR4 MIC MIC VRI VR2 VR3 SPEAKER1 017 107 141 168 29 50 51 16 90 152 35 85 181 C31 C113 C154 C134 C158 C120 C155 C60 C102 C157 C59 C144 C94 C185 XF1 CF1 071 05 06 010 122 121 15 117 1 20 13 18 12 19 14 108 1 16 113 L14 L15 L16 L10 L12 26 Customer INTEK 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 KEL V208AD KEL V308WFD KEL 101MA 1 KEL 102K LF KEL 159CL 4 KEL 689CL 4 KEL 689MA 2 KEL 752WF KER MX120FBB KER MX471EBB KER 100DBB KER 102KVSF637A KER 103KVSF637A KER 104KVSF637A KER 223KVSF637A 229 302 471 KER 473KVSF637A KER 479DBB KER 751DBB KERY 039 25 2314 011 067 0318 0474
21. 3 to P30 VAREF 10 X 60 AINO j WO Ports WO Ports 3 DESCRIPTIONS OF EACH BLOCK A Introduction The synthesizer is implemented with the following Components PLL IC 104 X TAL X2 VCO VARICAP DOIDE D402 D403 14 Model No M150 Plus Customer INTEK Rev No A INTEK IC5 is a cmos LSI that includes most of PLL block and driver the Q403 Q406 Q408 C412 C421 C416 C417 and L17 Varicap diode D402 D403 are clapp oscillator circuit to operate as a VCO Q406 is a switching transistor to connect or disconnect the tuning capacitor in the VCO oscillator tank circuit for transmitter or receiver 0411 works as a buffer AMP for RX local frequencies 38 2 and TX generating frequencies 26 MHz B Reference frequency The crystal X2 4 000 MHz and other components at IC4 can make a reference frequency oscillator with internal amplifier C VCO 0408 and surrounding parts are consisting a clapp oscillator works as a VCO the VCO can be oscillate over the required of 25 610MHz to 41 115 MHz D Phase detector and VCO control The detector is a digital phase comparator which compares the phase of the reference signal with programmable divider output square waves and develops a series of pulses whose DC level depends on the phase error of each signal E Transmitter Receiver buffer AMP Output signal of Q408 is fed into buffer AMP Q411 F Switching of tuning capacitor in VCO The VCO circuit must tune with a wide rang o
22. 70 16 710 MHz for EU and 16 90625 MHz 17 29625 MHz for UK With the provided first local frequencies to Q2 Q3 mixes the incoming RF signal to generate first IF signal Mixed signals were filtered with the XF1 10 695 MHz crystal filter and other tuning circuits Output signal of mixer is filtered with CF1 455 KHz ceramic filter The 455 KHz signal from the 2 IF filter was amplified and limits internaly After amplification the signals fed the quadrature detector loop L20 Then we can see the recovered audio signals on Pin 9 for FM of IC7 With the amplitude of recovered signals Q10 serves as an audio amplifier For AM signal Will be pass filter CF1 and induced to Q6 Q7 respective and detected to voice signal by D5 TROUBLESHOOTING HINTS Symptom Probable Cause Remedy Defective power switch VR1 Blown fuse Replace Replace Unit does not Broken DC power cord Defective IC5 Replace Replace work at all Defective external speaker jack Poor connection Repair or replace on microphone connector Defective push Repair or replace No output from switch on microphone Defective internal Repair or replace at all speaker Defective VR1 IC8 other Replace Replace the components defective components Measure all the voltage of IC7 with voltage Replace Replace chart Defective squelch circuit components No noise on RV5 RV7 VR2 IC7 speaker Defective
23. B KCC 473DRKBB KCC 473FRKBB KCC 561FRJNPOB KCC 609FRDNPOB KCC 680FRJNPOB KCC 682FRKBB KCC 683FRKBB KCC 820FRJNPOB KCD KDS160 2515 KCL 478TD KCR TO18 019 KCR 000B KCR 101B KCR 101D KCR 102B KCR 103B KCR 104B KCR 106B KCR 122B KCR 123B KCR 124B KCR 151B KCR 152B KCR 153B KCR 156B KCR 181B KCR 182B KCR 183B KCR 184B KCR 202B KCR 203B KCR 221B KCR 222B KCR 223B KCR 225B KCR 229B KCR 272B CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP Model No M150 Plus CER CER CER CHIP 50V CHIP 50V CHIP 16V CER CHIP 50V CER CHIP 50V CER CHIP 50V C CER CHIP 50V CER CHIP 50V CER CHIP 50V CER CHIP 50V DIODE CHIP KDS160 DIODE VARICAP CHIP TND NTC NTC RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES CHIP 0 47uH THERMISTORS NC THERMISTOR NCP CHIP 1 16W 0 CHIP 1 16W 100 CHIP 1 4W 100 CHIP 1 16W 1K CHIP 1 16W 10K CHIP 1 16W CHIP 1 16W 10 CHIP 1 16W 1K2 CHIP 1 16W 12K CHIP 1 16W 12 CHIP 1 16W 150 CHIP 1 16W 1 5K CHIP 1 16W 15 CHIP 1 16W 15M CHIP 1 16W 180 CHIP 1 16W 1 8K CHIP 1 16W 18 CHIP 1 16W 18 CHIP 1 16W 2K CHIP 1 16W 20 CHIP 1 16W 220 CHIP 1 16W 2 2K CHIP 1 16W 22 CHIP 1 16W 2M2 CHIP 1 16W 2R CHIP 1 16W 2 CH J 47PF 0 0047UF K 0 047uF K 0 047uF CH J S60PF H D 6PF
24. D L23A LT KCR 101B KCR 102B KCR 201B KCR 202B KCR 512B KCR 561B KEPC 1050 A KEPC 1054 A KER D103B502A KER 103RD123SF KER 503RD123SF 513 5 041 KESW 018 1 KETC 159 KEPC 1058 A KER 101JBB KER 102JBB KER 201DBB 202 512 KESW 015 Model No M150 Plus 02014 48 21 D CTT AMBER DIODE LED EL204HD SWITCH TACT EVQ JA FRONT PCB SMT LED RES RES RES RES RES RES PCB PCB CHIP AMBER 118 CHIP 1 16W 100 CHIP 1 16W IK CHIP 1 16W 200 CHIP 1 16W 2K CHIP 1 16W 5 CHIP 1 16W 560 149 44 1 6MM D 6MM 55 RED 04 AA2 54 UR91 T5 1K S FR 4 94 0 RD12BF 20C2 38 5K RD123SF 20BC 29K B RD123SF 20BC 29K A MIC PLUG 6PIN N 16 MIC ELEC 1034 SWITCH PUSH 2P2T P PVC 6C ROUND COIL 35 17 1 6 SS RES RES RES RES RES C FILM 1 8W 5 C FILM 1 8W 5 C FILM 1 2W 5 C FILM 1 8W 5 C FILM 1 8W 5 SWITCH TACT EVQ JA 042 1 ALPHA 10K 1002 ALP 50K 1002 ALPH QIINGXING 5 22101 000 50 94 0 5 100 S 1K S 200 S 2K S 5 1K 04 wW LED4 Rev No A K1 K2 K3 K4 K8 K9 K10 K11 LED2 LED3 R335 R336 R342 R343 R345 R338 R337 R344 R339 R346 R340 R347 R333 R334 R341 SWI R357 R356 R359 R354 R358 R355 K18 K19 K20
25. DIO SWITCH ON CE BAND Connection Adjuster Adjust for Step Setting Frequency adjustment MIC Receive Volume optional Squelch Frequency counter 1 optional CH selector to dummy load CT1 27 185MHz 300Hz 19 EU 9 off Figure 1 VCO Voltage adjustment MIC Receive Volume optional Squelch voltmeter between optional CH selector R97 C112and L17 1V at RX 1A CH9 OFF GND Figure 2 Model No M150 Plus Customer INTEK Rev No A PLL CIRCUIT BLOCK DIAGRAM 1 INTRODUCTION The frequencies for transmitter and receiver first local frequencies are all derived from a single 4 0 MHz crystal by means of a phase locked loop The first local oscillator frequencies are 26 965 MHz CH 1 to 27 405MHz CH 40 for EU and 27 60125 MHz CH 1 to 27 99125 MHz CH 40 for UK The second local frequency is fixed at 10 240 MHz to generate second IF 455 KHz The VCO operating frequency for the receiver is 37 660 MHz CH 1 to 37 560 MHz CH 40 as the first local oscillator injected through the buffer AMP 0411 into the first fed balanced mixer Q2 and Q3 2 BASIC SYNTHESIZER SCHEME The crystal frequency 4 000 MHz is divided by 800 times to make 5 KHz which is fed to one side of the phase detector The VCO output is divided by a programmable divider and fed to other side of the phase detector of 4 The feedback loop is closed by passing the phase detector output through an act
26. E476ERMKS 20 KEC E476ERMU 21 22 KEC TRO31 A 23 0070 24 0216 25 KED ZS8V2BSCST 26 KED 1K261 27 KED 4004 A 28 KEI 061LH 29 2651 30 KEI 266LH 31 267 32 2681 33 KEI 269LH 34 2701 35 271 36 KEI 272LH 37 2003 38 012 39 KEL S147 40 KEL 5148 4 KEL 5149 Model No M150 Plus PART LIST Description ANTENNA RECEPTACLE MIC SOCKET 6PIN N TINNED WIRE UL1007 TINNED WIRE UL1007 TINNED WIRE UL1007 TINNED WIRE UL1007 TINNED WIRE UL1007 DC POWER CORD 01 10 80HM 2W L3050AE 8 TRANSISTOR NPN 25 CAP ELECT 50V M CAP ELECT 50V M CAP ELECT 16V M CAP ELECT 16V M CAP ELECT 25V CAP ELECT 16V M CAP ELECT 16V M CAP ELECT 25V CAP ELECT 16V CAP ELECT 16V M CAP ELECT 16V M CAP TRIMMER CRYSTAL FILTER 10 CERAMIC FILTER LT4 8V2BSCST SEMTECH Z DIODE GERMANIUM DIODE IN4004 IFT 7X7MM 27MHZ KS 5840 LAIHENG KS2641 LIKHANG LH 2762 CAIHENG 320 5763 LATHENG 73C 359 LAIHENG IFT 321 0952 LAIHENG I 320 5714 LAIHENG I 92058517 LAIHENG I IC TDA2003 10W AUD SPEAKER JACK JC 30 0 8X6 0X5 5 TS P 0 8x2 5 7TS P B AI 0 6x5 0x13 5TS P B 89713 0013 16 6R QIINGXI NG 424 BLACK 424 BLUE 824 GREEN 824 RED 824 WHITE 15 20AWG 7BO5R ASAHI 2078 D 0 1UF 1UF 10UF 100UF 1000UF 22UF
27. M KCC T335DK3216 KCC 100FRJNPOB KCC 101FRJNPOB KCC 102FRJNPOB KCC 102FRKBB KCC 103FRKBB KCC 104DRKBB KCC 105BRZFB KCC 106BRZFF KCC 120FRJNPOB KCC 121FRJNPOB KCC 150FRJNPOB KCC 151FRJNPOB KCC 153DRKBB KCC 180FRJNPOB KCC 222FRKBB KCC 223DRKBB KCC 223FRKBB KCC 225BKBMUM KCC 270FRJNPOB KCC 271FRJNPOB KCC 390FRJNPOB 409 RES RES RES RES RES RES RES RES RES RES RES RES RES Model No M150 Plus CHIP 1 16W 100 CHIP 1 16W IK CHIP 1 16W 10K CHIP 1 16W 150 CHIP 1 16W CHIP 1 16W CHIP 1 16W 18K CHIP 1 16W 220 CHIP 1 16W 2 2K CHIP 1 16W 27K CHIP 1 16W 470 CHIP 1 16W CHIP 1 16W 56K TR CHIP NPN KTC38 TR CHIP NPN KTC38 TRANSISTOR MMBTSC3 BASE MAIN PCB SMT CAP TANT CHIP 16 CAP TANTALUM 3 3U CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CHIP CAP CAP CAP CAP CAP CER CHIP 50V CER CHIP 50V CER CHIP 50V CER CHIP 50V CER CHIP 50V CER CHIP 16V CER CHIP 10V CER CHIP 10V F CER CER CER CER CER CER CER CER CER CHIP 50V CHIP 50V CHIP 50V CHIP 50V CHIP 16V CHIP 50V CHIP 50V CHIP 16V CHIP 50V 10V 10 CHIP 50V CHIP 50V CHIP 50V CHIP 50V CER CER CER CER 1 5K 150K ATOK 75S GR 80S SOT 23 265Y SOT23 TOP V M 10V 10 A CH J 10PF CH 1 100PF CH J 0 0010 K 0 001UF K 0 01UF 0 Y5V 7
28. M 4W CE England 40CH FM 4W English Frequencies EC 40CH FM 4W CEPT U Poland 40CH AM 4W Polish Frequencies 5 7 PL Illegal Bands Russia 400CH AM 4W RU Poland 400CH 4W Polish Frequencies 5kHz PO Private Channels AM 4W PC Customer INTEK INTEK Model No M150 Plus Frequencies for EI band Italy 40 4W CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 J 27 035 AM FM 8 27 055 AM FM 9 27 065 AM FM 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 Customer INTEK INTEK Model No M150 Plus F
29. Model No M150 Plus Customer INTEK Rev No A NTEK M 150 Plus Service Manual Model No M150 Plus Customer INTEK Rev No A INTEK Table of Contents Page PTT 3 Test and Alignment Procedure 4 Block MR PEE 13 Schematic 14 Printed Circuit Board EON FPES Ro 20 Channel Frequency Charts 22 dn AE 31 Semiconductor Voltage Chart 37 Model No M150 Plus Customer INTEK Rev No A INTEK SPECIFICATIONS 1 GENERAL Sia 400 AM FM 4W Frequency T 25 615 10 30 105 2 COMUG PLL Operating Temperature 10 55 DG Input 13 2 15 180 L X 35 H X 140 D mm s MT E UUO MOM 0 850 kg 2 RECEIVER Receiving 5 Dual Conversion Super Heterodyne Intermediate mig 1 IF 10 695 MHz 2 IF 455 MHZ eis prz d 0 5 u
30. ROM control for VCO alignment for Channel RU 14D RU 15D RU 21G and RU 220 VCO Alignment Channel band CH01A 25 610MH2 Low channel RU band channel CH40L 30 105MHz High channel Model selection and European band and International band selection Model select M 150 R146 N A and R145 10K M 760 R146 47K and R145 N A CPU PIN64 pull high for M 150 CPU PIN64 pull low for M 760 International Band select IB pad open for European band only International band disable IB PAD shorting that the International band enable and the European band enable also CPU pin 21 pull high for International Band Model No M150 Plus Customer INTEK Rev No A INTEK 7 BAND SELECTION M 150 1 switch ON radio while pressing the UP key 2 display will show the current band ID code blinking 3 select band using the UP or DN keys 4 shortly press the DN key to confirm 5 display will show the selected band ID code for 2 3 seconds then it will show the channel number 760 1 switch ON radio while pressing the EMG key 2 display will show the current band ID code blinking 3 select band using the UP or DN keys 4 shortly press the EMG key to confirm 5 display will show the selected band ID code for 2 3 seconds then it will show the channel number 6 0 Factory Setting of Band for Shipment FACTORY SETTI NG radios must be shipped from factory set as follows BAND SETTING EUROPEAN BANDS ONLY RA
31. V for 20 SINAD in FM mode Audio Less Than 8 1 KHz ejt eR cc 65 dB Adjacent 65 ren Noise 45 Current Drain at Seu Dad e QU 325 mA 3 TRANSMITTER 4W Q 13 2 V DC retenir tera dne pocta FM 1 8 KHz 0 2 KHz Frequency respofisa ecc odo mede E te xb ev From 400 Hz to 2 5 KHz OOOMDUT mpedati6e oos 50 Signal Noise 40 dB MIN Current 2 41 0 220 0 2 22 2 2 2 24 4 111122 2 2 44 1 1300 mA Model No M150 Plus Customer INTEK Rev No A INTEK OPERATION INSTRUCTIONS Having properly installed your batteries and hooked up the antenna you are now ready to operate your radio for optimum reception and voice transmission Turn the power ON with ON OFF switch Set the desired channel Adjust the squelch control knob to reduce any undesirable background noise when no signal is being received To do this select a channel where no signal are present or wait until signals cease on your channel Then rotate the squelch control knob clockwise to a point where the backgro
32. V4 62741 22 ee emer HH Roe sa CETT dddddade R182 10K 59 51 Ww m E 5 39 a 200 E adr R179 3 9 4 012 10 16 gt 021 9 TX H L MOD FM 35205806 C145C146 0 01 0 01 KIA7042F ANT SOCKET TP5 4210467 9 C73 L13 L14 L15 0 0012 0 2uH 0 2uH 0 2uH 0 2uH L11 c67 560P 3102912 0 01 L 3205774 124 76 3104071 47 C142 C74 471 iem NA C71 C72 C77 C78 C79 120P 180P 220P 270P 270P D10 504892 1N4004 R57 R59 063 47 0 01 C96 108 0 047 0 047 LED1 R151 22K AM WIRE MIC No 1 YELLOW No 4 MAGENTA LED TX RX No 2 BLUE No 5 GND MICROPHONE 2512864Z 2511625Z No 3 RED No 6 WHITE CONDENSER 2511625Z R5482K mil gt Meli 4 5 WIN 1 50 4 2 JU 521 ED 1 TP 1 C505 522 04 506 R52 8 050 R524 202 50 4 5 ELE j a M 150 lt 1049 6 224 Wee woul 8 70 09 29 2007 MODULE O00 K8 Q DN Q UP
33. ander set off M 150 W O Compander Set RF S S G Freq 27 225MHz Mod 1 2KHz Fmod IKHz Output level 1mV The Volume control turn to 0 5 watts audio output for reference A dB Then off the Modulation here the audio output for reference B dB for S N gt 35dB Compander set to On repeat above item 3 and 4 A B for S N 2 50dB M 760 only UUT set to AM CH22 set RF S S G Mod for 60 Compander set Off Repeat above item 3 and 4 for S N gt 35dB Compander set to On repeat above item 3 and 4 for S N gt 50dB M 760 only 7 UUT set to AM CH22 set RF S S G mod for 30 RF level set 5 0uV ESP set off RF Gain set to maximum Squelch DO set to minimum ANL set off Noise generater pulse 105 width 100ms output level 1 0Vrms set to on and connect to the antenna socket with network combinator 8 Setaudio output level for 0 8Vrms for OdB reference RF S S G MOD turn off set ANL to ON the audio output should be drop 6dB or below 4 3 TX Section Alignment 431 TX output power and Frequency Alignment 1 UUT set to FM EU CH19 Antenna connect to the RF power meter input terminal 2 Set UUT to TX mode adjust L8 and L9 for TX power output maximum and then adjust the RV4 check the output TX power for 4 0W 3 Set UUT turn to AM mode check the TX power output for 0 7 to 1 3W 4 Change to channel to UK band 1740 27 99125 2 Adjust the trimmer capacitor to 27 99125MHz
34. d 40CH AM FM 4W Polish Frequencies 5 7 Model No M150 Plus CH Frequency MHz Modulation 1 26 960 2 26 970 AM FM 3 26 980 AM FM 4 27 000 AM FM 5 27 010 AM FM 6 27 020 AM FM T 27 030 8 27 050 9 27 060 10 27 070 11 27 080 12 27 100 13 27 110 14 27 120 15 27 130 AM 16 27 150 17 27 160 18 27 170 19 27 180 20 27 200 21 27 210 22 27 220 23 27 250 24 27 230 25 27 240 AM 26 27 260 27 27 270 28 27 280 29 27 290 30 27 300 31 27 310 32 27 320 33 27 330 34 27 340 35 27 350 36 27 360 37 27 370 38 27 380 39 27 390 40 27 400 25 Customer INTEK INTEK Item Part Number 1 010 2 512 3 KEJW TA24BK 4 KEJW TA24BL KEJW TA24GR KEJW TA24RD KEJW TAZAWE KEOE 0T513 9 5 253 10 KET C2078D 11 KEC E104HRMU 12 KEC E105HRMU 13 KEC E106ERMU 14 KEC E107ERMU 15 KEC E108FRMU 16 KEC E226ERMU 17 KEC E227ERMU 18 KEC E227FRMU 19 KEC
35. f frequencies 25 610 2 to 30 15MHz for transmitter and 36 305 41 115 MHz for receiver To comply above rang of VCO the tuning capacitance should switched for transmission or reception G Receiver local oscillator outputs First Mixer The secondary output signals is injected to the sources of 1 mixer Q2 Q3 in the 1 IF mixer section Second Mixer The output of 10 24 MHz oscillator circuit with XF1 is injected into the IF IC internally Incoming IF signal and 10 24 MHz are mixed inside the IF IC to extract 2 IF signal 455 KHz FM AM audio signals are recovered with the way of quadrature detector AM signals are recovered with envelope detector Model No M150 Plus Customer INTEK Rev No A INTEK 4 FREQUENCY STABILITY LET Fo Crystal oscillator frequency Fr Phase detector reference frequency VCO frequency Ft Transmit frequency Then Fr Fo 800 And under locked conditions Fr WHERE is the programmable divider divide ratio THEN Fr From which it can be seen the percentage error in Ft is the same as the percentage error in Fo The stability of the crystal oscillator is determined primarily by the crystal itself and having lesser deviation by the active and passive components of the oscillator The choice of crystal and component is such that the required frequency stability is maintained over the required voltage and temperature rang 26 1 ANT L24
36. he available power 4 W or slightly less RV4 and corresponding three transistors control supply voltage of RF amplifier and other circuits Tune all the trimmer parts for maximum indication of RF power meter and adjust RV4 to make 4 w indication of RF power meter The tuning is adjusted so that the actual power is from 3 5 to 4 0 W There are no other additional controls for adjusting the TX output power D Modulation Control a FM The mic input is fed to mic audio amplifier KIA324 which drives modulation varicap diode D403 in the VCO circuit RV1 limits the incoming modulation audio levels to inhibit over modulation While reading the modulation factor on the modulation analyzing equipment adjust RV1 shall not exceed 1 7 KHz Dev After 20 dB up from 1 25 2 1 2 KHz Dev Audio level b AM Modulation signals are filtered with RC network and goes to the audio power AMP IC IC103 to make nominal signal level to achieve wanted modulation To control incoming audio signal diode D7 and corresponding ALC circuit limits the modulation shall not exceed 90 adjust RV3 90 modulation under 1 0 KHz AF 60 mod plus 20 dB of audio signal Model No M150 Plus Customer INTEK Rev No A INTEK E Receiver CB receiver is dual conversion supper heterodyne type with the first IF 10 695 MHz and second IF 455 KHz Receiver is separated two blocks 1 IF section and 2 IF section The PLL synthesizer supplies first local frequency 16 2
37. ive low pass filter and using the output to control the VCO frequency through varicap diode D402 D403 Under locked conditions both of phase detector input signal must be indential at 5 KHz The VCO frequency is then given by FVCO N 0 005 MHz or 0 005 x MHz Since is an integer VCO frequency can be stepped up with 5 KHz increments By suitable choice the desired output frequency can be obtained Channel 1 Channel 40 FUNCTION N FVCO N FVCO Transmit 5393 26 965 5481 27 405 EU Receive 7532 37 660 7620 38 100 Transmit 5520 25 27 60125 5598 25 27 99125 Uk Receive 7659 2 38 296 7737 25 38 68625 Since all frequencies are obtained from crystal controlled PLL oscillator all outputs are coherent with the crystal oscillator frequency and maintaining the same percentage accuracy Model No M150 Plus Customer INTEK Rev No A NTEK INTERNAL BLOCK DIAGRAM Block Diagram WO Poet Segment Output 57 Pi7 SEG24 COM3 to COMO 67 to SEGO pogas 50623 63 Power Supply vss LCD driver cicuit co LOD Power e Supply v2 Reset VO RESET control Test Pin TEST Comtrol Circum Standby Control Circuit wake up Timing Gonorater Resonator XIN High Connecting frequency lock et rm il Timer P22 to 20 AVDD P67 AIN7 P3
38. requencies for I2 band Italy 34CH AM FM 4W CH Frequency MHz Modulation 1 26 965 AM FM 2 26 975 AM FM 3 26 985 AM 4 27 005 3 27 015 AM 6 27 025 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 AM 21 27 215 22 27 225 23 27 255 24 27 245 25 27 265 26 26 875 27 26 885 28 26 895 29 26 905 30 26 915 31 26 925 32 26 935 33 26 945 34 26 955 35 26 855 36 26 863 Model No M150 Plus Customer INTEK Rev No A INTEK Frequencies for DE band Germany 80CH 4W 12 AM 1W CH Frequency MHz Modulation CH Frequency MHz Modulation 1 26 965 FM 41 26 565 FM 2 26 975 FM 42 26 575 FM 3 26 985 FM 43 26 585 FM 4 27 005 44 26 595 5 27 015 45 26 605
39. rtion meter distortion less than 590 Set volume control to maximum position audio output power shall be more than 3 Watts 4 2 2 Sensitivity Adjust l Ow 8 9 RX RF bandwidth alignment Apply Spectrum analyzer s Track Gen Output connect to the UUT antenna terminal and input connect to the 026 Emitter center frequency set 27MHz span set 30MHz adjust IFT L4 1 21 amp L22 refer to attached table curve then short TP3 amp TP4 UUT set to FM mode 22 output of RF signal generator connect to TP5 Antenna Set RF S S G Freq 27 225MHz Mod 1 2KHz Fmod 1KHz Output level 0 5uV Adjust the volume control for 2V output on distortion meter read Adjust L2 amp L3 for more than 12dB at SINAD meter Repeat as needed Check all channels sensitivity must met the D T S specifications UUT set to AM mode CH22 output of RF signal generator connect to TP5 Antenna Set RF S S G Freq 27 185MHz Mod 60 Fmod 1KHz Output level 0 5uV Adjust the volume control for 2V output on distortion meter read 10 Adjust L2 amp L3 for more than 12dB at SINAD meter 11 Repeat as needed Check all channels sensitivity must met the D T S specifications 4 2 3 T 1 Qo ms I OS Squelch Sensitivity Adjust UUT set to AM CH22 output of RF signal generator to the antenna input terminal Set S S G Freq 27 225MHz Mod 60 Fmod 1KHz Output level 47dBm Volume con
40. trol and Squelch control set to maximum position Full C W Adjust the 5 to mute the speaker then turn the RF S S G output level to 47dBm Slowly turn 5 to a position that the audio output on the speaker just appears from no output Turn the RF S S G output level to 57dBm the audio must be off from the speaker Auto Squelch Adjust UUT set to AM CH22 output of RF signal generator to the antenna input terminal Set S S G Freq 27 225MHz Mod 60 Fmod 1KHz Output level 104dBm Squelch volume control set to minimum and Off position Full C C W Adjust the RV7 to mute the speaker Slowly turn RV7 to a position that the audio output on the speaker just appears from no output Turn the RF S S G output level to 107dBm the audio must be off from the speaker 4 2 4 RX Signal Meter Display Adjust For M 760 Only 1 UUT set to CH22 output of RF signal generator to antenna input terminal RF Gain volume at maximum Power switch turn on Model M150 Plus Customer INTEK Rev No A INTEK 2 Turn the RFS S G output for 100uV without modulation 3 Adjust RV6 for 9 characters displayed at the RX signal strength of the LCD 4 RF S S G level output increase 30dB the RX signal strength should up to 30 position 4 2 5 Maximum S N Detector amp ANL detection 1 UUT set to FM CH22 output of RF signal generator to antenna input terminal RF Gain set to maximum Squelch set to minimum comp
41. und noise disappears Note When the squelch is set properly the speaker will remain quiet until a signal is received In order to receive weak signals do not set the squelch too high Adjust the volume to the desired listening level To Transmit Press and hold the push to talk button Speak slowly and clearly in a normal voice two to three inches from the microphone A buit in modulation control circuit will automatically adjust the microphone input level There is no need to speak loudly To Receive Release the push to talk button Model No M150 Plus Customer INTEK Rev No A INTEK THEORY OF OPERATIONS TRANSMITTER A RF Amplification The output of double AMP Q14 is fed through tuning IFT L8 to the base of pre driver AMP Q15 The output is then supplied through tuning circuit 19 to RF driver AMP Q16 The output of Q16 is supplied with tuning circuit L10 and C116 C67 C95 and goes to the base of final RF AMP Q17 The output of Q17 is supplied to the antenna through L C tuning circuit B Circuit for Suppression of Spurious Radiation The tuning circuit between the output of final AMP Q17 and antenna 4 stage PHI network 113 C142 C71 C72 L14 C74 C75 L15 C77 C78 L16 C79 C80 L24 serves as a spurious radiation suppressor This network also serves to match the impedance between TX power AMP Q17 and the antenna C Circuit for Limiting Power After finished all alignment the constant voltage supply circuit limits t
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