Replacing The Circuit Fuse Board - Motorola GP344 Detailed Service Manual

Replacing the Circuit Fuse Board

3.0 Replacing the Circuit Fuse Board
In cases where the radio fails to turn on when power is applied, the circuit board fuse should always
be checked as a probable cause of the failure. The locations of the fuse for both the UHF and VHF
boards are shown in Figure 3-1. The radio must be disassembled to replace the fuses as described in
the Basic Service Manual (see Chapter 1 - Related Documents), then the circuit board separated
from the radio chassis as described in the paragraphs that follow.
Figure 3-1 VHF, UHF Band 1, and UHF Band 2 Circuit Board Fuse Location
C3231
C3232
C3233 C3242
C3234
Q3301
C3238
C3220
R3221
C3211
L3308
C3218
U3503
Q3561
C3804
L3809 C3808
L3801
R3727 VR439
R3802
L3811 C3755
L3701
Q3801
C3727 VR506
C 3762
R3762
R3808
C3761
R3825
R3824
C3821
C3732
C3731
C3813
C3707
C3709 C3704
C3733
D3702
L3731
FL401
CR411
U410
Q416
R413
C419
C420
C421
C422
C452
C448
L410
VR432
VR433
VHF Board
J102
R328 R340 C307
C108 C339
L303
Q301 C340
R304
CR303 C341
CR103
R170 L304
P100 C342
C321
R347
C311 37
R305
C314 C347
C356
C395
C132 C312
C348
R133 CR304 L306 1
C337
R306
H101
R307 C329
C173
CR305
C355
C317
C336
R102 R329
R315
C105
C126 VR439
17
25
U102
1
9
F501
C174
3
C135
L112
C134
C241
C378
L241
C242 R233
C201
L242 C231
C293
C244
R112
R110 R231
R111 R244
R232
C295
C281 10
1
R245
U241
C298
11 20
C202
C259
C255
R251 R254
R332
3
R252 C218
C207
U210
4
L251 C206
CR251 C258
C296
R511
L505
Fuse
F501
C345
25
C334
U301
13
C382
R343
L331
C326
R313
C327 C330
Q302
1
2
B501
VR441
VR442
R205
C279
3 4
Y201
2
J102
4 C 1
S501
2 C 8
R328 R340 C307
C339
C108
L303
Q301 C340
R304
R101
CR303 C341
L304
C342
C321
R305 C345
C311 R347 25
37
P100
C314
C334
C347
C356
U301
C348
C395
C312
C132
R133 CR304 1
13
L306 C337
R306
H101
R307 C329
C173
C382
CR305
C355
R343
C317 C336 L331
C326
R313
C327 C330
R102 R329
Q302
R315
C105
C126
17
25
VR439
U102
1
9
1
C174
F501
3 2
C135
L112 B501
C134
C241
C378
L241
C278
C242
R233
VR506
C201
L242 C231
C277
C293
R112
R231 R232
R110 C244
R111
C295
R244
U248
C281 R245 10
1
C279
U241
C298
C202
11 20
R332
C259
C255
R251 R254
U211
R252
3
C218 C207
CR251
4
L251
C296
C258
C206
R511
UHF Band 1 Board
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