Chapter 2
TROUBLESHOOTING CHARTS
1.0
Controller Troubleshooting Chart
Controller Check
Power Up
Alert Tone
OK?
Speaker &
Control
Head OK?
U0101
EXTAL=
7.3728 MHz/
14.7456
MHz?
BUS+
activity when
volume knob
rotated?
MCU is OK
Not able to
program
RF Board ICs
Before replacing
MCU, check SPI
clock, SPI data,
and RF IC select
Replace
Speaker /
Control Head
U0221 Pin 34 =
16.8 MHz?
Check
FGU
Reprogram the
correct data. &
Check ASFIC
and MCU
Check Control
Head and MCU
(U0101, U0121,
U0122, U0111)
Press PTT. No
RF Output
Power.
Red LED
lights up?
Check
Control
Head
Check
FGU &
Transmitter
Audio
at Pin 41
U0221?
Enable External PTT
with CPS
External PTT
enabled with
CPS?
Radio could
not PTT
externally
DC
at assigned
Acc. Con.
Pin DC
changes?
Check Components
between U0221 and
U0271
Check
Connection
to uP port
PTT
NO
YES
NO
YES
YES
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
EXT
PTT
RX
AUDIO
Check
Accessories
J0501
Audio at Pin
16 &
Pin 1
Check Spk.
Flex
Connection &
Control Head
Audio
at Audio PA
(U0271)
input
Check
ASFIC
U0221
Check
Audio PA
(U0271)
Check
Receiver &
IF IC
Audio at
Pin 2
U0221?
NO
NO
NO
YES
YES
NO
YES
NO
Before troubleshooting the controller section
according to this chart please check the following:
1. Check tuning and CPS settings
2. Check if Alert Tones are enabled
3. Check if Control Head is OK
4. Check board visually
9.3V
DC at Pin 5
of U0641?
YES
NO
5V DC at
Pin OUT of
U0651?
YES
NO
Check U0641, Q0641,
Q0661, D0660 &
D0661
Check U0651, D0651,
D0621
Summary of Contents for 6864115B62-C
Page 1: ...Professional Radio GM Series Detailed Service Manual 6864115B62 C ...
Page 2: ...ii ...
Page 4: ...iv ...
Page 5: ...Professional Radio GM Series Service Maintainability Issue July 2007 ...
Page 8: ...ii ...
Page 22: ...2 10 MAINTENANCE ...
Page 25: ...Professional Radio GM Series Controlhead Service Information Issue July 2007 ...
Page 77: ...Professional Radio GM Series Controller Service Information Issue May 2007 ...
Page 100: ...2 2 TROUBLESHOOTING CHARTS ...
Page 104: ...3 4 Controller schematics parts list ...
Page 154: ...3 52 Controller T12 Schematic Diagrams ...
Page 155: ...Professional Radio GM Series VHF 136 174MHz Service Information Issue May 2007 ...
Page 164: ...1 6 MODEL CHART AND TECHNICAL SPECIFICATIONS ...
Page 176: ...2 12 THEORY OF OPERATION ...
Page 186: ...3 10 TROUBLESHOOTING CHARTS ...
Page 190: ...4 4 VHF PCB SCHEMATICS PARTS LISTS ...
Page 252: ...4 66 VHF 1 25W PCB 8471235L02 Schematics VHF 136 174 MHz IF ...
Page 256: ...4 70 VHF 1 25W PCB 8471235L02 Schematics ...
Page 257: ...Professional Radio GM Series UHF 403 470MHz Service Information Issue May 2007 ...
Page 266: ...1 6 MODEL CHART AND TECHNICAL SPECIFICATIONS ...
Page 366: ...2 12 THEORY OF OPERATION ...
Page 372: ...3 6 Low Band TROUBLESHOOTING CHARTS ...