2-7
MCU Check
Power Up
Alert Tone
OK?
Speaker
OK?
U409 EXTAL=
7.3728 MHz?
U201 Pin 19
16.8 MHz
5V at U247?
3.3V at U248?
U409 Reset Pin
94 High?
MCU is OK
Not able to pro-
gram RF Board
ICs
Before replacing
MCU, check SPI
clock, SPI data,
and RF IC select
Replace
Speaker
Read Radio
OK?
Check
Setup
Reprogram the
correct data.
See FGU
Troubleshooting
7.5V at
Pin 3/5 U247?
4/3.3V at Pin 1
U248
Check
Q400
Replace
U247/U248
Check any short
to SWB+,
Vdda or Vddd
Press PTT. Red
LED does not
light up
PTT U409
Pin 53
low?
Press PTT
Q502-2
High?
Check
PB504
Check
Q502-2
voltage
LED
Q502,R501
OK?
Replace
Faulty
Component
Check
Accessories
J403
OPT_SEL_1 &
OPT_SEL_2
Pin 8 & 9
low?
Radio could
not PTT
externally
U409
Pin 52, 6
low?
See FGU
Troubleshoot-
ing chart
LED should
light up
Check
MCU
PTT
NO
YES
YES
No
No
NO
YES
YES
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
NO
YES
NO
YES
YES
NO
NO
YES
EXT
SPKR
EXT
PTT
INT
AUDIO
J403 Pin 9
low? Pin 8
high?
ASFIC U404
Pin 14 & 15
high?
Check
Accessories
Check
U404
Check
U420 Audio PA
NO
NO
YES
YES
J403 Audio
at Pin 2 &
Pin 3
Check Spk. Flex
Connection
Audio at
AudioPA
(U420)
input
(U447)
Audio from Pin 41
ASFIC, U404?
Check
ASFIC U404
Check
Audio PA
(U420)
Check
U301
LV ZIF
Audio at
Pin 2
U404?
NO
NO
NO
YES
YES
NO
YES
Figure 2-6
Troubleshooting Chart for Controller
Содержание GP-688
Страница 5: ...Compact Professional Portable Radios Service Maintainability Issue July 2007 ...
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Страница 32: ...3 8 SERVICE AIDS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 34: ...4 2 POWER UP SELF TEST THIS PAGE INTENTIONALLY LEFT BLANK ...
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Страница 52: ...2 10 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 64: ...3 12 CONTROLLER KEYPAD SCHEMATICS ...
Страница 88: ...3 36 PCB and Scematic Diagrams Radios with Keypad and Display EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 92: ...3 40 PCB and Scematic Diagrams Radios with Keypad and Display EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 96: ...3 44 PCB and Scematic Diagrams Radios with Keypad and Display EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 112: ...3 60 PCB and Schematic Drawings IP67 THIS PAGE INTENTIONALLY LEFT BLANK ...
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Страница 130: ...3 78 PCB and Schematic Diagrams Radios without Keypad and Display THIS PAGE INTENTIONALLY LEFT BLANK ...
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Страница 134: ...3 82 PCB and Schematic Diagrams Radios without Keypad and Display THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 137: ...PCB and Schematic Diagrams Radios without Keypad and Display EPP 3 85 Complete Controller Schematic Diagram 8415885H01 ...
Страница 140: ...3 88 PCB and Schematic Diagrams Radios without Keypad and Display EPP Controller Memory Schematic Diagram 8415885H01 ...
Страница 142: ...3 90 PCB and Schematic Diagrams Radios without Keypad and Display EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 147: ...Compact Professional Portable Radios VHF 136 174MHz Service Information Issue July 2007 ...
Страница 150: ...iv ...
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Страница 195: ...VHF PCB and Schematic Diagrams EPP 3 23 VHF 136 174MHz Controls And Switches Schematic Diagram sht 1 of 2 8415533H02 ...
Страница 196: ...3 24 VHF PCB and Schematic Diagrams EPP VHF 136 174MHz Controls And Switches Schematic Diagram sheet 2 of 2 8415533H02 ...
Страница 197: ...VHF PCB and Schematic Diagrams EPP 3 25 VHF 136 174MHz Receiver Front End Schematic Diagram 8415533H02 ...
Страница 198: ...3 26 VHF PCB and Schematic Diagrams EPP VHF 136 174MHz Receiver Back End Schematic Diagram 8415533H02 ...
Страница 199: ...VHF PCB and Schematic Diagrams EPP 3 27 VHF 136 174MHz Synthesizer Schematic Diagram 8415533H02 ...
Страница 200: ...3 28 VHF PCB and Schematic Diagrams EPP VHF 136 174MHz Voltage Controlled Oscillator Schematic Diagram 8415533H02 ...
Страница 201: ...VHF PCB and Schematic Diagrams EPP 3 29 VHF 136 174MHz Transmitter Schematic Diagram 8415533H02 ...
Страница 202: ...3 30 VHF PCB Schematic Diagrams and Radio Parts List RF Radio EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 208: ...3 36 VHF PCB Schematic Diagrams and Radio Parts List RF Radio EPP THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 218: ...3 46 VHF PCB Schematic Diagrams and Radio Parts List RF Board IP67 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 224: ...3 52 VHF PCB Schematic Diagrams and Radio Parts List RF Board IP67 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 237: ...Compact Professional Portable Radios UHF1 403 470MHz Narrow Band 450 470MHz Service Information Issue July 2007 ...
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Страница 328: ...3 70 UHF Narrow Band PCB Schematic Diagrams and Radio Parts List RF Board THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 334: ...3 76 UHF Narrow Band PCB Schematic Diagrams and Radio Parts List RF Board THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 335: ...Compact Professional Portable Radios UHF2 450 527MHz Service Information Issue July 2007 ...
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Страница 348: ...1 10 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 356: ...2 8 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 360: ...3 4 UHF2 PCB SCHEMATICS PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK ...
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