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Manuals
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Motorola Manuals
Two-Way Radio
GP series
Service information
Models With Pcb 8486458Z03 - Motorola GP Series Service Information
Professional radio, power distribution and controller
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Also See for GP Series
:
Detailed service manual
(494 pages)
,
Service manual
(300 pages)
,
Service information
(108 pages)
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2-2
1.2
Models with PCB 8486458Z03
INT
AUDIO
NO
J403 Audio
at Pin 2 &
Pin 3
YES
Audio from Pin 41
Check Spk. Flex
Connection
Check
NO
U301
IF IC
EXT
PTT
Radio could
not PTT
externally
OPT_SEL_1 &
OPT_SEL_2
EXT
SPKR
J403 Pin 9 low?
Pin 8 high?
YES
ASFIC U404
Pin 14 & 15
high?
YES
Check
U420 Audio PA
PTT
Press PTT. Red
LED does not
light up
Audio at
YES
AudioPA
(U420)
input
PTT U409
(U447)
Check
Audio PA
(U420)
YES
NO
ASFIC, U404?
Press PTT
Q502-2
NO
Audio at
Pin 2
Q502-2
U404?
voltage
YES
Check
LED should
ASFIC U404
light up
J403
NO
Check
Accessories
Pin 8 & 9
low?
U409
YES
YES
Pin 52, 6
NO
low?
Check
NO
Accessories
NO
Check
U404
MCU Check
Power Up
Alert Tone
NO
Pin 53
low?
Check
PB504
YES
High?
No
U409 EXTAL=
Check
7.3728 MHz?
LED
YES
Q502,R501
OK?
U201 Pin 19
16.8 MHz
No
Replace
Faulty
Component
5V at U247?
3.3V at U248?
Check
MCU
U409 Reset Pin
94 High?
See FGU
Troubleshoot-
ing chart
MCU is OK
TROUBLESHOOTING CHARTS
Not able to pro-
YES
gram RF Board
ICs
OK?
NO
NO
Replace
Speaker
Speaker
OK?
YES
YES
Read Radio
OK?
NO
NO
YES
7.5V at
NO
Pin 3/5 U247?
4/3.3V at Pin 1
U248
YES
NO
Check any short
to SWB+,
Vdda or Vddd
YES
Before replacing
MCU, check SPI
clock, SPI data,
and RF IC select
NO
Check
Setup
YES
Reprogram the
correct data.
See FGU
Troubleshooting
NO
Check
Q400
YES
Replace
U247/U248
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This manual is also suitable for:
Gp140
Gp320
Gp340
Gp360
Gp380
Gp240
...
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Gp280
Gp540
Gp580
Gp640
Gp680
Gp1280
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