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[RF UNIT]

[RF UNIT]

S.=Surface mount

R33

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R34

7030003420 S.RESISTOR

ERJ3GEYJ 681 V (680 

R35

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

R36

7030003360 S.RESISTOR

ERJ3GEYJ 221 V (220 

R37

7030003600 S.RESISTOR

ERJ3GEYJ 223 V (22 k

R45

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R50

7310003630 S.TRIMMER

EVM-1XSX50 BQ4 (473) 

R51

7030003770 S.RESISTOR

ERJ3GEYJ 564 V (560 k

R52

7030003460 S.RESISTOR

ERJ3GEYJ 152 V (1.5 k

R53

7030003700 S.RESISTOR

ERJ3GEYJ 154 V (150 k

R54

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R55

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

R56

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

R57

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

R58

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R59

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

R60

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R61

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R62

7030003230 S.RESISTOR

ERJ3GEYJ 180 V (18 

R64

7030003650 S.RESISTOR

ERJ3GEYJ 563 V (56 k

R65

7030003500 S.RESISTOR

ERJ3GEYJ 332 V (3.3 k

R66

7030003570 S.RESISTOR

ERJ3GEYJ 123 V (12 k

R67

7030003780 S.RESISTOR

ERJ3GEYJ 684 V (680 k

R68

7030003750 S.RESISTOR

ERJ3GEYJ 394 V (390 k

R69

7030003510 S.RESISTOR

ERJ3GEYJ 392 V (3.9 k

R70

7030003610 S.RESISTOR

ERJ3GEYJ 273 V (27 k

R71

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R72

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R73

7030003780 S.RESISTOR

ERJ3GEYJ 684 V (680 k

R74

7030003750 S.RESISTOR

ERJ3GEYJ 394 V (390 k

R75

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R76

7030003510 S.RESISTOR

ERJ3GEYJ 392 V (3.9 k

R83

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R86

7030003300 S.RESISTOR

ERJ3GEYJ 680 V (68 

R88

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R93

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10 

R202

7030003600 S.RESISTOR

ERJ3GEYJ 223 V (22 k

R205

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R206

7310003610 S.TRIMMER

EVM-1XSX50 B14 (103) 

R207

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

R208

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

R209

7030003360 S.RESISTOR

ERJ3GEYJ 221 V (220 

R213

7030003360 S.RESISTOR

ERJ3GEYJ 221 V (220 

R301

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R302

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R303

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

R304

7030003370 S.RESISTOR

ERJ3GEYJ 271 V (270 

R305

7030003510 S.RESISTOR

ERJ3GEYJ 392 V (3.9 k

R306

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R310

7030003740 S.RESISTOR

ERJ3GEYJ 334 V (330 k

R311

7030003400 S.RESISTOR

ERJ3GEYJ 471 V (470 

R312

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

R313

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10 

C1

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C2

4030008920 S.CERAMIC

C1608 JB 1C 473K-T-A

C3

4030008920 S.CERAMIC

C1608 JB 1C 473K-T-A

C5

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C6

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C7

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C8

4030006970 S.CERAMIC

C1608 CH 1H 060D-T-A

C9

4030010780 S.CERAMIC

C1608 CH 1H 1R5C-T-A

C10

4030007010 S.CERAMIC

C1608 CH 1H 100D-T-A

C11

4030009470 S.CERAMIC

C1608 CH 1H R75C-T-A

C12

4030006990 S.CERAMIC

C1608 CH 1H 080D-T-A

C13

4030007090 S.CERAMIC

C1608 CH 1H 470J-T-A

C16

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C17

4340000180 S.MYLAR

ECHU 1C 333JB5

C20

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C21

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C23

4030006980 S.CERAMIC

C1608 CH 1H 070D-T-A

C26

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C28

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C30

4030006980 S.CERAMIC

C1608 CH 1H 070D-T-A

C31

4030006980 S.CERAMIC

C1608 CH 1H 070D-T-A

C32

4030006970 S.CERAMIC

C1608 CH 1H 060D-T-A

C35

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C36

4030006990 S.CERAMIC

C1608 CH 1H 080D-T-A

C42

4030007010 S.CERAMIC

C1608 CH 1H 100D-T-A

C43

4030007040 S.CERAMIC

C1608 CH 1H 180J-T-A

C44

4030007060 S.CERAMIC

C1608 CH 1H 270J-T-A

C46

4030007020 S.CERAMIC

C1608 CH 1H 120J-T-A

C47

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C48

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C50

4030007020 S.CERAMIC

C1608 CH 1H 120J-T-A

C51

4030007020 S.CERAMIC

C1608 CH 1H 120J-T-A

C52

4030006930 S.CERAMIC

C1608 CH 1H 020C-T-A

C53

4030009540 S.CERAMIC

C1608 CH 1H 1R5B-T-A

C54

4030009350 S.CERAMIC

C1608 CH 1H 3R5B-T-A

C55

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C56

4030006910 S.CERAMIC

C1608 CH 1H 0R5C-T-A

C57

4030009520 S.CERAMIC

C1608 CH 1H 020B-T-A

C60

4550006350 S.TANTALUM

TEMSVB2 1A 226M-8L

C61

4030006960 S.CERAMIC

C1608 CH 1H 050C-T-A

C62

4340000180 S.MYLAR

ECHU 1C 333JB5

C63

4610002150 S.TRIMMER

CTZ3S-10A-W1-AF

C64

4030009660 S.CERAMIC

C1608 JF 1C 224Z-T-A

C65

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C67

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C68

4550006590 S.TANTALUM

ECST1CY684R

C69

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C70

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C72

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C73

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C74

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C75

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C76

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C77

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C78

4030007110 S.CERAMIC

C1608 CH 1H 680J-T-A

C79

4510004630 S.ELECTROLYTIC ECEV1CA100SR

C80

4030009660 S.CERAMIC

C1608 JF 1C 224Z-T-A

C81

4030008920 S.CERAMIC

C1608 JB 1C 473K-T-A

C82

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C83

4030008680 S.CERAMIC

C2012 JF 1C 105Z-T-A

C84

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C85

4550006480 S.TANTALUM

TEMSVA 1C 475M-8L

C86

4030011810 S.CERAMIC

C1608 JB 1A 224K-T-N

C87

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C88

4550006250 S.TANTALUM

TEMSVA 1A 106M-8L

C89

4030009880 S.CERAMIC

C1608 JB 1H 682K-T-A

C90

4030006900 S.CERAMIC

C1608 JB 1E 103K-T-A

C91

4030008920 S.CERAMIC

C1608 JB 1C 473K-T-A

C92

4030006900 S.CERAMIC

C1608 JB 1E 103K-T-A

C93

4030006900 S.CERAMIC

C1608 JB 1E 103K-T-A

C95

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C96

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C101

4030006920 S.CERAMIC

C1608 CH 1H 010C-T-A

C102

4030009520 S.CERAMIC

C1608 CH 1H 020B-T-A

C201

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C202

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C203

4030007050 S.CERAMIC

C1608 CH 1H 220J-T-A

C204

4030006970 S.CERAMIC

C1608 CH 1H 060D-T-A

C205

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C206

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C207

4030006990 S.CERAMIC

C1608 CH 1H 080D-T-A

C208

4030007000 S.CERAMIC

C1608 CH 1H 090D-T-A

C209

4030006970 S.CERAMIC

C1608 CH 1H 060D-T-A

C210

4030006980 S.CERAMIC

C1608 CH 1H 070D-T-A

C212

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

C215

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C216

4030009540 S.CERAMIC

C1608 CH 1H 1R5B-T-A

C217

4030006970 S.CERAMIC

C1608 CH 1H 060D-T-A

C218

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C219

4030006960 S.CERAMIC

C1608 CH 1H 050C-T-A

J1

6910007660 CONNECTOR

IMSA-9210B-1-02T

J2

6510018170 S.CONNECTOR

4-175643-4

W5

7030003860 S.JUMPER

ERJ3GE JPW V

W201

7030003860 S.JUMPER

ERJ3GE JPW V

W202

7030003860 S.JUMPER

ERJ3GE JPW V

EP1

0910051972 PCB

B 5421B  

EP2

6910013310 S.BEAD

MMZ1608D121B

6 - 3

REF

ORDER

DESCRIPTION

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DESCRIPTION

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Summary of Contents for PMR446

Page 1: ...SERVICE MANUAL PMR446 FM TRANSCEIVER...

Page 2: ...M2x6 ZK IC 446S Chassis 10 pieces Addresses are provided on the inside back cover for your convenience 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transce...

Page 3: ...SUPPLY CIRCUITS 4 3 4 5 PORT ALLOCATIONS 4 3 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 PLL AND TRANSMITTER ADJUSTMENTS 5 2 5 3 RECEIVER ADJUSTMENT 5 3 SECTION 6 PARTS LIST SECTION 7 MECH...

Page 4: ...iving system Double conversion superheterodyne Intermediate frequency 1st 21 7 MHz 2nd 450 kHz Sensitivity 12 dB SINAD Less than 0 25 V 12 dB V Adjcent chnnel selectivity 55 dB Spurious response 65 dB...

Page 5: ...amplifier IC9 NJM2070M EEPROM IC3 AT24C02N CPU IC1 PD753036GK 3 Regurator IC6 S 81230SG TOP VIEW BOTTOM VIEW 1st mixer Q2 3SK284 Reference oscilletor X1 CR 669 21 25MHz PLL IC IC1 PD3140GS TOP VIEW BO...

Page 6: ...L 1 Unscrew 1 screw A and 4 screws B 2 Remove the rear panel in the direction of the arrow REMOVING THE RF UNIT 1 Remove 1 knob C and unscrew 1 nut D 2 Then remove the RF unit REMOVING THE MAIN UNIT 1...

Page 7: ...applied to the 2nd mixer circuit 4 1 4 2ND MIXER AND DEMODULATOR CIRCUITS RF UNIT The 2nd mixer circuit converts the 1st IF signal into a 2nd IF signal A double conversion superheterodyne system whic...

Page 8: ...cuit modulates the VCO oscillating signal RF signal using the microphone AF signals The filtered audio signals from the MAIN unit are passed through the deviation adjustment pot R50 and are then appli...

Page 9: ...EPROM IC3 Outputs data signals to the EEPROM IC3 Output port for power save function applied to VCO regurator circuit RF unit Q13 Q14 D8 D9 Outputs the R 3 regulator control sig nal Q25 D4 Outputs the...

Page 10: ...C millivoltmeter External speaker Attenuator GRADE AND RANGE Frequency range 300 3000 Hz Measuring range 1 500 mV Frequency range 0 1 600 MHz Output level 0 1 V 32 mV 127 to 17 dBm Frequency range DC...

Page 11: ...or to the MIC jack and set as 1 kHz 100 mV rms Set an FM deviation meter as HPF OFF LPF 20 kHz or 15 kHz De emphasis OFF Detector P P 2 Transmitting Set group No OFF Set an audio generator output leve...

Page 12: ...UNIT LOCATION Audio signal disappears 1 2 Operating channel Ch 04 Connect an SSG to J1 on the RF unit and set as Frequency 446 04375 MHz Level 0 14 V 124 dBm Modulation OFF Receiving Set an SSG as Le...

Page 13: ...RJ3GEYJ 104 V 100 k R63 7030003530 S RESISTOR ERJ3GEYJ 562 V 5 6 k R64 7030003590 S RESISTOR ERJ3GEYJ 183 V 18 k R65 7030003590 S RESISTOR ERJ3GEYJ 183 V 18 k R66 7030003590 S RESISTOR ERJ3GEYJ 183 V...

Page 14: ...ESISTOR ERJ3GEYJ 333 V 33 k RF UNIT MAIN UNIT S Surface mount C34 4030006880 S CERAMIC C1608 JB 1H 472K T A C35 4030011600 S CERAMIC C1608 JB 1C 104KT N C36 4030006860 S CERAMIC C1608 JB 1H 102K T A C...

Page 15: ...006980 S CERAMIC C1608 CH 1H 070D T A C31 4030006980 S CERAMIC C1608 CH 1H 070D T A C32 4030006970 S CERAMIC C1608 CH 1H 060D T A C35 4030006860 S CERAMIC C1608 JB 1H 102K T A C36 4030006990 S CERAMIC...

Page 16: ...30045220 2045 BATT seal 1 MP14 8930046280 2045 ANT termainal 1 MP15 8930045350 2045 A terminal 1 MP16 8930045360 2045 B terminal 1 MP17 8930045370 2045 C terminal 2 MP19 8930045740 2045 sheet 1 MP20 8...

Page 17: ...RF RF UNIT MP1 C SP1 C MP10 C MP12 C EP1 M DS2 M MP7 C MP5 C MAIN unit MP20 C MP25 C MP4 RF MP14 C MP17 C MP2 RF MP16 C MP23 C MP5 RF MP11 C MP13 C MP4 C MP2 C MP15 C MP25 C MP9 C MP8 C RF unit MP24...

Page 18: ...ol K1 3SK284 Symbol U1 2SC4215 O Symbol QO 2SC4226 T2 R25 Symbol R25 2SC4228 T2 R44 Symbol R44 2SC5006 T1 Symbol 24 2SA1586 GR Symbol SG 2SB798 T2 DK Symbol DK 2SC3356 R24 T2B Symbol R24 2SC4081 T107S...

Page 19: ...C74 R49 R200 R201 R114 R115 R119 R204 W3 R98 C53 C60 C81 R74 R76 C63 R23 R80 R78 C88 W7 C90 C62 R102 R12 C35 C34 R10 C25 C3 R9 R31 R202 R118 R110 R45 R36 C36 C31 R42 R41 C32 R38 R46 C7 R13 C4 C79 R50...

Page 20: ...C85 C99 R2 R30 C1 R39 C73 R40 R64 W2 R5 R53 C24 C98 C93 R52 R51 C83 Q2 Q12 Q1 Q29 R32 R35 C28 C91 C10 R14 C51 R62 R103 R101 R117 R105 R203 R108 R100 R96 R57 C26 R34 C40 R95 C11 R33 C27 R7 R6 C29 C6 I...

Page 21: ...D8 C86 C48 C61 C69 R10 W5 L15 R45 C16 C26 C23 R27 R64 R302 R215 R205 D103 C206 R209 R202 C202 W202 L205 C207 C208 L201 W201 C201 C203 C204 L202 R213 R305 L208 R313 R306 C67 R12 C70 R65 R93 R62 C87 R1...

Page 22: ...0 R206 Q12 C84 Q7 C56 Q6 C51 D4 D5 L13 L12 C32 R70 J1 FI3 FI2 B5421B R72 C6 L3 R7 R75 R76 Q16 R74 C93 C92 C91 D102 D101 C210 C209 R207 C205 R301 L206 R83 C5 C95 R73 R16 R25 C7 L4 R30 R29 C20 L11 C53 C...

Page 23: ...4EU LPF IDC 3V IC2A NJM2100M Q6 2SK1829 MIC MUTE IC2B NJM2100M Q23 2SJ144 R58 AF VOL VOL MUTE MC1 KUC3523 PTT SENSE MIC SW MIC R 3 CURRENT AMP R 3 T 3 3V CURRENT AMP Q25 UMZ2N D4 1SS355 3V to LOGIC 3...

Page 24: ...COM0 COM1 COM2 COM0 COM1 COM2 DS2 LD BU10503J R65 18 k R66 18 k R64 18 k 3 V SHIFT VOL CK DATA STB AF SENS SQL MOD PSC R 3 T 3 BATT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J4 8 IC2a NJM2100M R30 15 k C73 0...

Page 25: ...4 6 P T 3 C23 7 P R202 22 k D2 MA77 C70 470 P D1 MA77 R12 1 k R208 1 k R37 22 k C102 2 P C88 10 C16 470 P R305 3 9 k C62 0 033 R45 8 2 k C68 0 68 R306 8 2 k R10 8 2 k C17 0 033 C61 5 P R88 4 7 k R313...

Page 26: ...om france com Crta de Gracia a Manresa Km 14 750 08190 Sant Cugat del Valles Barcelona SPAIN Phone 93 590 26 70 Fax 93 589 04 46 URL http www icomspain com Corporate Headquarters 2380 116th Avenue N E...

Page 27: ...COVER 99 12 18 8 39 AM Page 1...

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