Motorola PM400 Service Manual Page 208
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- Table of contents
- TROUBLESHOOTING
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UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-17
1
TP408
TEST_POINT
D3_3V
10.K
R445
Q414
R459
47.K
1.u
C490
10.K
R431
VR400
6.80
D3_3V
10.K
R444
Q415
TEST_POINT
TP405
1
BOOT_EN_IN_CH
R421
220.
Q403
R401
2.7K
R460
FILT_SW_B+
1.5K
Q401
33.K
R436
D3_3V
3.3K
R457
Q412
SCI_CH
ACCESS_PTT
PROG_OUT-ALARM_4
39.K
R430
R429
100.K
D401
220.
R461
120.p
R458
D3_3V
C418
3.3K
MIC_PTT_CH
MIC_PTT
MIC_SENSE
HOOK_CH
120.p
C417
D402
R407
0.
0.
R406
0.
R405
0.
R404
R403
0.
R402
0.
PROG_I-ACC_C_3
PROG_O-ACC_C_4
PROG_I-ACC_C_6
PROG_IO-ACC_C_8
PROG_IO-ACC_C_12
PROG_IO-ACC_C_14
Q416
R435
33.K
D3_3V
R456
3.3K
R434
D3_3V
Q411
33.K
R455
3.3K
Q410
D3_3V
PROG_IO-P8_I
PROG_IO-P8_O
PROG_IN-P6_I
Q404
33.K
R433
3.3K
R454
Q409
D3_3V
R432
33.K
R453
3.3K
PROG_IO-P14_I
PROG_IO-P12_I
PROG_IO-P12_O
Q405
Q408
PROG_IO-P14_O
PROG_OUT-ALARM_4
PROG_IO-P8_O
PROG_IO-P12_O
PROG_IO-P14_O
VS_AUDIO_SEL
VS_GAIN_SEL
10.K
R470
D3_3V
R422
10.K
3.30
VR402
Q413
VS_INT
VS_RAC
VS_CS
R469
DNP
DNP
R468
DNP
DNP
R466
R467
22.n
C421
SPI_CLK
SPI_MOSI
120.p
C422
100n
C423
D3_3V
RESET
10
SERIN
14
SEROUT
9
VCC
16
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
U405
MC74HC595A
CLK_L
12
CLK_S
11
EN_OE
13
GND
8
R440
10.K
VSTBY
DNP
DNP
DNP
DNP
DNP
10K
47K
DNP
10K
47K
10K
47K
47K
47K
47K
47K
47K
47K
47K
47K
47K
47K
10K
47K
10K
47K
10K
47K
EXT_ALARM_OUT
EXT_MIC_PTT
PROG_IN
PROG_I/O
PROG_I/O
PROG_I/O
TO SHEET 2
UHF2 (438-470 MHz) 25-40 W Microprocessor and Controller Circuits (Sht 2 of 2)
- Foreword 3
- Document Copyrights 3
- Disclaimer 3
- SAFETY INFORMATION 10
- Chapter 1 12
- INTRODUCTION 12
- 3.2 Motorola Online 13
- 3.3 Mail Orders 13
- 3.4 Telephone Orders 13
- 3.5 Fax Orders 13
- 4.0 Radio Model Information 14
- 1-4 INTRODUCTION 15
- Chapter 2 16
- MAINTENANCE 16
- 2-2 MAINTENANCE 17
- 2-4 MAINTENANCE 19
- 2-6 MAINTENANCE 21
- 2-8 MAINTENANCE 23
- SERVICE AIDS 24
- 2.0 Test Equipment 25
- OVERVIEW 30
- 1-2 OVERVIEW 31
- 2.3 Keypad Keys 33
- 2.6 Speaker 34
- 3.1 Power Supplies 35
- 3.2 SPI Interface 35
- 3.3 Keypad Keys 36
- 3.4 LCD Driver 36
- 3.7 Speaker 37
- (see table on next page) 39
- Key_Row Voltage TP402 40
- 2.1 Control Head Failure 41
- SHOWN FROM SIDE 1 46
- Control Head CM200 Schematic 47
- Bottom Side 49
- Top Side 49
- UHF2, 1-25 W, 438-470 MHz 58
- mP U403 90
- OL 79B02969C76-O 97
- OL 79B02969C78-O 97
- SHOWN FROM SIDE 2 98
- OL 79B02969C77-O 98
- OL 79B02969C79-O 98
- DC & AUDIO 100
- SHEET 2 OF 8 102
- 73D02968C74-O 102
- FRACN_63A27 103
- SHEE 5 OF 8 104
- TO SHEET 1 105
- SHEET 6 OF 8 106
- SHEET 7 OF 8 108
- SHEET 8 OF 8 110
- SHEET 3 OF 8 111
- List 1-25 W 112
- COMPARTMENT 123
- Option Board 126
- Keypad/Display 126
- CM200/CM300/PM400 150
- Computer Software Copyrights 151
- Table of Contents 152
- UHF2, 25-40 W, 438-470 MHz 156
- 2.0 Technical Specifications 157
- Transmitter 158
- Receiver 158
- THEORY OF OPERATION 160
- 2.2 Receiver Back End 161
- 3.3 Final Stage 162
- 3.4 Directional Coupler 162
- 3.5 Antenna Switch 162
- 3.6 Harmonic Filter 163
- 3.7 Power Control 163
- 4.1 Reference Oscillator 163
- 4.2 Fractional-N Synthesizer 164
- 4.4 Synthesizer Operation 166
- 5.1 Radio Power Distribution 167
- 5.2 Protection Devices 169
- 5.3 Automatic On/Off 169
- 5.6 SBEP Serial Interface 171
- 2-14 THEORY OF OPERATION 173
- 7.0 Transmit Audio Circuits 174
- 2-16 THEORY OF OPERATION 175
- 8.1 Sub-Audio Data (PL/DPL) 176
- 8.2 High Speed Data 177
- 9.1 Squelch Detect 178
- 2-20 THEORY OF OPERATION 179
- 9.4 Handset Audio 180
- 10.2 Alert Tone Circuits 181
- Chapter 3 182
- TROUBLESHOOTING CHARTS 182
- uP U403 188
- 3-8 TROUBLESHOOTING CHARTS 189
- Chapter 4 192
- Internal SPKR+ Jumper 197
- MRF1513’s Thermal pad 199
- LVFRACN Shield 201
- VCOBIC Shield 202
- FRONT-END SHIELD 203
- MIXER SHIELD 203
- IFAMP_DEC1 204
- IFAMP_DEC2 204
- AUDIOOUT 204
- AUDIO_FEED 204
- POWER SUPPLY 205
- TO SHEET 2 208
- UHF3, 25-40 W, 465-495 MHz 256
- VCOBIC Shield 330
- VCO Shield 330
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