Replacing The Circuit Board Fuse; Figure 8-1. Uhf/Vhf/Low Band/800 Mhz/900 Mhz Circuit Board Fuse Locations - Motorola HT Series Detailed Service Manual

Maintenance: Replacing the Circuit Board Fuse
8.7

Replacing the Circuit Board Fuse

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 radio must be disassembled to replace the fuses
as described in the Basic Service Manual (see
separated from the radio chassis as described in the paragraphs that follow.
C3301
C3231
C3232
C3233
C3234
C3224
C3321
R3315
R3307
R3314
Q3301
R3304
C3316
C3238
C3220
R3221
C3211
L3308
C3218
R3319
R3222
U3503
R3563
R3562
Q3561
R3569
R3807
C3804
L3809 C3808 L3801
R3727
C3809
C3802
R3802
C3755
C3811 L3811 L3701
Q3801
C3805 VR506
C3727
C3810
C3762
R3811 R3762
R3808
C3761
R3806
R3825
R3824
C3821
R3826 C3732
C3731
C3813
C3707
C3709
C3704
C3733
D3702
L3731
R3760
R3761
R449
C435
FL401
CR411
U410
Q416
R414
R425
R413
C419
C420
C421
C422
C452
C448
L410
VR432
VR433
VHF Board
4 C 1
S501
2 C 8
C528
L301
C366
CR300
C364
C308
R306
R310
C363
C317
R309 C303
L302
C357
C107 37
C352
C353
1
C359
C356
C139
U350
C318
R317
U302
R102 C155
C154 C117
R101 R108
C153
C152
C158
17
25
VR502
U102
1
9
3
E101
F501
R113 C160 C161
L262
R217
C220
C225
C279
C278
L259 C266 C218
C249
R262
R264 C267
C240
Q251
10
1
C286 U250
C206
R251
11 20 C233
R263
C256
R261 C265
L256
C287
C246
C235
L261
CR251 C244
SH402
R445 C435
R449
C407
C405
U410 CR411
R425 Q416
C411
R413
C414
C419
R461
C415 C420
76
C421
C451
C422
C452
C447 C448
C453
R423 R424 R432 U409
C456 R411
1
L410
R473
C449 C463
VR432
VR433
800 MHz Board

Figure 8-1. UHF/VHF/Low Band/800 MHz/900 MHz Circuit Board Fuse Locations

C3242
VR439
L505
C3763
R426
R420
C379
C126
25
U351
13
C136
C107
VR101
C137
R101
VR507
C160
R121
R353
C159
1
2
B501
R118
C122
R281
L265
R250
L259
C267
C257
VR505
C217 R274
C211
L252
C522
C291
C286
C253
Q251
C241
C290
Y200
C254
C260
C255
C268
C250 L256 C263
C251
VR506
C436
C405
R426
R463 R414
C411
R420
C414
51 C415
C451
C452
26
E401 E403
VR432
VR433
section Table 1-1. on page
Fuse
F501
C528
L301
C366
CR300
C308
R306
C364
R310 R309 C317 C363
L302 C303
C357
C352
C353
C359
C356
C318
U350
U302 R317 VR507
R332
R353
R336
R333
C302
C102 C165
C103
R329 R331
R334
VR502
F501
C280
U202
C225
C851
R856 R853
R851
C216
C860
R203 C218
CR201
C852
C801 C212
C208
CR202
C802
C292
R218
C262
C242
C803
C804
R449 R445 R460
C407
C435
CR411
U410 Q416
C436
R463 R414
R425
R426
R413
R461
R420
C419
C420
C421
C422
C448 C453
C447
R432
R423 R424
R439
C439
C456
R411
R473 L410
C449 C463 E403
E401
900 MHZ Board
1-3), then the circuit board
J102
4
2
R328
R340 C307
C108
Q301
R304
R101
L304
C321
R305 C311 R347
C314
P100
C312
C132
R133
L306
R306
H101
R307
C173
C317
R329
R102
C105
C126
17
25
VR439
U102
1
9
C174
C135
L112
C134
C241
C378
CR243 CR242
L241
C242
L242
C244
R112
R110
R111 R244
C295
C281
10
R245
1
U241
11 20
R332
C259
R251 C255 R254
R252
CR251
L251
C296
C258
R445
R449
R434
C407
C411 R425
R413
C414
C419
C420
C415
C421
C451
C422
C416
C452 C448
C447
R473
VR448 VR446 VR445
VR432
VR433
UHF Board
VR101 R116
C538
R117
C142 C506
R504
C140 C137
R512
R513
C143
Fuse
R102
F1
C126
R103
C117
C134
R119
C129 R108
C132
L108
C135
R107
C139 C131
R115
R236
C297
R239
C227 C221 C222
R234 R238
C256
R204
L215 U207
R228
C230 C226 R231 C225
R232
L204
L209
L208
C215
C298
C299
C214
R449
C407 R445
C409
U410
R425
C411
R413
C414
R461
C419
C415 C420
C421
C451
C422
C452 C448
C453
C447 R432
R423 R424
C456 R411
L410
R473
VR432
VR433
Low Band Board
8-5
C
C 8
C339
L303
C340
CR303 C341
C342
25 C345
37
C334
C347
C356
U301
C348
C395
1
13
C337
C329
C382
C355 L331
R343
C336
C326
R313
C327 C330
Q302
R315
1
F501
3 2
B501
C278
R233
VR506
C201
C277
C231
C293
R231 R232
U248
VR441
C279
C298
C202
C218 C207 CR203
U210
3
4
C206
C435
FL401
C436
CR411
U410 Q416
R426
R463 R414
R420
R461
51
76
C453
R432
U409
C456 R411
1
26
L410
C449 C463 E401 E403
C339
C340
C341
C334
C342
C321
C320
C325
U302
R307
R224
L200
R225
VR202
C257
C204
C258 C205
C236
C435
CR411
Q416
R463
C433 R414
R426
R420
C449 C463 E401 E403