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[MAIN UNIT]

[MAIN UNIT]

IC1

1140008770 S.IC

µPD753036GK-559-BE9

IC2

1110002820 S.IC

NJM2100M-T1

IC3

1140008350 S.IC

AT24C02N-10SI-2.7

IC5

1110004710 S.IC

S-80928ANMP-DDR-T2

IC6

1180001150 S.IC

S-81230SG-QB-T1

IC9

1110002810 S.IC

NJM2070M-T1

Q1

1590000720 S.TRANSISTOR

DTA144EUA T106

Q2

1590001440 S.TRANSISTOR

UN9214 (TX) 

Q3

1590002920 S.TRANSISTOR

DTA123JUA T106

Q5

1510000580 S.TRANSISTOR

2SA1362-GR (TE85R) 

Q6

1560000840 S.FET

2SK1829 (TE85R) 

Q7

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q10

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q11

1530003090 S.TRANSISTOR

2SC4213-B (TE85R) 

Q12

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q14

1590001330 S.TRANSISTOR

DTA114EUA T106

Q18

1510000770 S.TRANSISTOR

2SA1586-GR (TE85R) 

Q23

1590001390 S.FET

2SJ144-Y (TE85R) 

Q25

1590002490 S.TRANSISTOR

UMZ2N TR

Q27

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q28

1520000200 S.TRANSISTOR

2SB798-T2 DK

Q29

1590000680 S.TRANSISTOR

DTC114EUA T106

Q101

1590002630 S.TRANSISTOR

UMZ1N TR

D2

1750000550 S.DIODE

1SS355 TE-17

D4

1750000550 S.DIODE

1SS355 TE-17

D5

1750000550 S.DIODE

1SS355 TE-17

X1

6050010450 S.XTAL

CR-627 (5.8368 MHz) 

R2

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

R4

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

R5

7030003810 S.RESISTOR

ERJ3GEYJ 125 V (1.2 M

R6

7030003710 S.RESISTOR

ERJ3GEYJ 184 V (180 k

R7

7030003450 S.RESISTOR

ERJ3GEYJ 122 V (1.2 k

R9

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R10

7030003310 S.RESISTOR

ERJ3GEYJ 820 V (82 

R12

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10 

R13

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R14

7030003500 S.RESISTOR

ERJ3GEYJ 332 V (3.3 k

R22

7030003620 S.RESISTOR

ERJ3GEYJ 333 V (33 k

R23

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

R24

7030003820 S.RESISTOR

ERJ3GEYJ 155 V (1.5 M

R25

7030003570 S.RESISTOR

ERJ3GEYJ 123 V (12 k

R26

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R27

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100 

R30

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

R31

7030003800 S.RESISTOR

ERJ3GEYJ 105 V (1 M

R32

7030003780 S.RESISTOR

ERJ3GEYJ 684 V (680 k

R33

7030003540 S.RESISTOR

ERJ3GEYJ 682 V (6.8 k

R34

7030003540 S.RESISTOR

ERJ3GEYJ 682 V (6.8 k

R35

7030003530 S.RESISTOR

ERJ3GEYJ 562 V (5.6 k

R36

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R37

7030003600 S.RESISTOR

ERJ3GEYJ 223 V (22 k

R38

7030003600 S.RESISTOR

ERJ3GEYJ 223 V (22 k

R39

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

R40

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R41

7030003530 S.RESISTOR

ERJ3GEYJ 562 V (5.6 k

R42

7030003500 S.RESISTOR

ERJ3GEYJ 332 V (3.3 k

R43

7030003650 S.RESISTOR

ERJ3GEYJ 563 V (56 k

R45

7030003840 S.RESISTOR

ERJ3GEYJ 225 V (2.2 M

R46

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100 

R49

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100 

R50

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R51

7030003760 S.RESISTOR

ERJ3GEYJ 474 V (470 k

R52

7030003740 S.RESISTOR

ERJ3GEYJ 334 V (330 k

R53

7030003820 S.RESISTOR

ERJ3GEYJ 155 V (1.5 M

R54

7030003450 S.RESISTOR

ERJ3GEYJ 122 V (1.2 k

R55

7030003330 S.RESISTOR

ERJ3GEYJ 121 V (120 

R56

7030004050 S.RESISTOR

ERJ3GEYJ 1R0 V (1 

R57

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

S.=Surface mount

R58

7210001970 VARIABLE

RV-244

R59

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R61

7030003280 S.RESISTOR

ERJ3GEYJ 470 V (47 

R62

7030003680 S.RESISTOR

ERJ3GEYJ 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 (18 k

R67

7030003590 S.RESISTOR

ERJ3GEYJ 183 V (18 k

R68

7030003590 S.RESISTOR

ERJ3GEYJ 183 V (18 k

R69

7030003590 S.RESISTOR

ERJ3GEYJ 183 V (18 k

R70

7030003660 S.RESISTOR

ERJ3GEYJ 683 V (68 k

R71

7030003620 S.RESISTOR

ERJ3GEYJ 333 V (33 k

R72

7030003800 S.RESISTOR

ERJ3GEYJ 105 V (1 M

R74

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R76

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R77

7030003400 S.RESISTOR

ERJ3GEYJ 471 V (470 

R78

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R79

7030003720 S.RESISTOR

ERJ3GEYJ 224 V (220 k

R80

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R81

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R86

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R87

7030003800 S.RESISTOR

ERJ3GEYJ 105 V (1 M

R88

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R89

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

R90

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

R94

7030003720 S.RESISTOR

ERJ3GEYJ 224 V (220 k

R95

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R96

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R97

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R98

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R99

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R100

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R101

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R102

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R103

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R105

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R106

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R108

7030003620 S.RESISTOR

ERJ3GEYJ 333 V (33 k

R110

7030003800 S.RESISTOR

ERJ3GEYJ 105 V (1 M

R112

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

R114

7030003500 S.RESISTOR

ERJ3GEYJ 332 V (3.3 k

R115

7030003410 S.RESISTOR

ERJ3GEYJ 561 V (560 

R117

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R118

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

R119

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

R200

7030003840 S.RESISTOR

ERJ3GEYJ 225 V (2.2 M

R201

7030003370 S.RESISTOR

ERJ3GEYJ 271 V (270 

R202

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100 

R203

7030003550 S.RESISTOR

ERJ3GEYJ 822 V (8.2 k

R204

7030003540 S.RESISTOR

ERJ3GEYJ 682 V (6.8 k

C1

4030008470 S.CERAMIC

C1608 JB 1H 272K-T-A

C3

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C4

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C5

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C6

4030008680 S.CERAMIC

C2012 JF 1C 105Z-T-A

C7

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C8

4510004630 S.ELECTROLYTIC ECEV1CA100SR

C9

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C10

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C11

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C15

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C17

4550006880 S.TANTALUM

TEMSVD2 0J 157M-12R

C18

4510004630 S.ELECTROLYTIC ECEV1CA100SR

C20

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C21

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C24

4030008900 S.CERAMIC

C1608 JB 1C 333K-T-A

C25

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C26

4030006850 S.CERAMIC

C1608 JB 1H 471K-T-A

C27

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

C28

4030008920 S.CERAMIC

C1608 JB 1C 473K-T-A

C29

4030007150 S.CERAMIC

C1608 CH 1H 151J-T-A

C31

4030008880 S.CERAMIC

C1608 JB 1C 223K-T-A

C32

4030011600 S.CERAMIC

C1608 JB 1C 104KT-N

6 - 1

SECTION 6

PARTS LIST

REF

ORDER

DESCRIPTION

NO.

NO.

REF

ORDER

DESCRIPTION

NO.

NO.

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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