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Motorola Manuals
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CP040
Detailed service manual
Troubleshooting Table For Board And Ic Signals - Motorola CP040 Detailed Service Manual
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Also See for CP040
:
Basic user's manual
(292 pages)
,
Basic service manual
(66 pages)
,
Service information
(46 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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2-6
4.0
Troubleshooting Table for Board and IC Signals
IC Designator
U51
IFIC
U52
BW Select Switch
Pin
Pin Function
1
RF input 44.85 MHz
2
RF input decoupling
3
2nd LO osc output
4
2nd LO osc input
5
RSSI output
6
Vcc
7
Audio feedback
8
Audio output
9
RSSI feedback
10
Quad detector input
11
Limiter output
12
Limiter decoupling 2
13
Limiter decoupling 1
14
Limiter input
15
Ground
16
IF amp output
17
IF amp decoupling 2
18
IF amp input
19
IF amp decoupling 1
20
2nd mixer output
1
Inverter 1 input
2
Inverter 2 output
3
Inverter 3 input (NU)
4
Ground
5
Inverter 3 output (NU)
6
Inverter 2 input
7
Inverter 1 output
8
Vcc
TROUBLESHOOTING TABLES
DC Voltage
Comments (Condition)
1.20
1.20
4.02
4.60
0.74
(no received signal)
4.70
0.89
1.44
DEMOD to stage U510
0.74
(no received signal)
2.22
1.25
1.30
1.30
1.28
GND
1.22
1.26
1.26
1.26
3.09
0
(25 kHz mode)
0
(25 kHz mode)
GND
GND
4.96
3.00
(25 kHz mode)
4.95
(25 kHz mode)
4.96
Table of
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Table of Contents
Troubleshooting
Troubleshooting tables
47
Troubleshooting Table for Receiver
91
Troubleshooting Table for Synthesizer
93
Troubleshooting Table for Transmitter
94
Troubleshooting Table for Board and IC Signals
96
Chapter 2 TROUBLESHOOTING TABLES
153
Troubleshooting Table for Synthesizer
155
Troubleshooting Table for Transmitter
156
Troubleshooting Table for Board and IC Signals
158
Chapter 2 TROUBLESHOOTING TABLES
233
Troubleshooting Table for Synthesizer
235
Troubleshooting Table for Transmitter
236
Troubleshooting Table for Board and IC Signals
238
Chapter 2 TROUBLESHOOTING TABLES
295
Troubleshooting Table for Synthesizer
297
Troubleshooting Table for Transmitter
298
Troubleshooting Table for Board and IC Signals
300
TROUBLESHOOTING TABLES
375
Troubleshooting Table for Synthesizer
377
Troubleshooting Table for Transmitter
378
Troubleshooting Table for Board and IC Signals
380
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