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Section 3: 2-1
Chapter 2
TROUBLESHOOTING CHARTS
1.0
Troubleshooting Flow Chart for Controller
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 µP 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
Controller
Check
Summary of Contents for PRO Series
Page 1: ...CDM Series and PRO Series Two Way Mobile Radios Detailed Service Manual 6881091C63 F ...
Page 4: ...Notes ...
Page 6: ...Notes ...
Page 8: ...Section 1 ii 6881091C63 F Notes ...
Page 12: ...Section 1 1 4 Radio Model Information 6881091C63 F Notes ...
Page 22: ...Section 1 2 10 Notes For All Schematics and Circuit Boards 6881091C63 F Notes ...
Page 46: ...Section 2 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 78: ...Section 3 1 20 Controller Board Audio and Signaling Circuits Section 6881091C63 F Notes ...
Page 80: ...Section 3 2 2 Troubleshooting Flow Chart for Controller 6881091C63 F Notes ...
Page 84: ...Section 3 3 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 146: ...Section 3 3 66 Controller T6 T7 Schematics and Parts Lists 8471235L06 Notes 6881091C63 F ...
Page 152: ...Section 4 1 4 Technical Specifications 6881091C63 F Notes ...
Page 168: ...Section 4 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 172: ...Section 4 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 232: ...Section 5 1 4 Technical Specifications 6881091C63 F Notes ...
Page 242: ...Section 5 2 10 UHF Band 1 403 470 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 296: ...Section 6 1 4 Technical Specifications 6881091C63 F Notes ...
Page 306: ...Section 6 2 10 UHF Band 2 450 512 527 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 316: ...Section 6 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 352: ...Section 7 3 6 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 356: ...Section 7 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 458: ...Section 8 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 474: ...Section 8 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 496: ...Section 9 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 512: ...Section 9 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 530: ...Section 10 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 546: ...Section 10 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 564: ...Section 11 1 4 Technical Specifications 6881091C63 F Notes ...
Page 580: ...Section 11 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 582: ...Section 11 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 608: ...Section 12 1 4 Technical Specifications 6881091C63 F Notes ...
Page 624: ...Section 12 3 8 Troubleshooting Flow Chart for PassPort 6881091C63 F Notes ...
Page 626: ...Section 12 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 654: ...Section 13 1 4 Technical Specifications 6881091C63 F Notes ...
Page 672: ...Section 13 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...