2-4
TROUBLESHOOTING CHARTS
4.0
Troubleshooting Flow Chart for Synthesizer
Is
16.8MHz
signal at
U201 pin
23?
5V
at pin 6 of
D201
Is
information
from
µ
P
U409
correct
?
Is
U201 Pin18
AT 4.6
VDC?
Is
U201
Pin47 AT =
13VDC
?
Start
Visual
check of the
Board OK
?
Correct
Problem
Check5V
Regulator
+5V
at U201
Pin’s
13 & 30
?
Is
16.8MHz
Signal at
U201 Pin
19?
Are the
waveforms
at Pin’s 14 &15 of
U201 rectangular
?
Check
L202
Remove
Shorts
Replace or
resolder
necessary
components
Is
RF level at
U201 Pin 32 as
indicated
?
Are
R226,R209,
R210,L204,C231,
C220, C225, C218,
R216 & C217
OK
?
Replace
U201
If L203, C227 & C228
are OK, then see VCO
troubleshooting chart
Are
Waveforms
at Pins 14 & 15
triangular?
Do
Pins 7,8 & 9
of U201 toggle
when channel is
changed?
Check prgramming
lines between
U409 and U201
Pins 7,8 & 9
Replace U201
Check uP U409
Troubleshooting
Chart
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
YES
YES
NO
YES
YES
YES
NO
NO
NO
NO
YES
NO
YES
Check
D201,D202,
C244, C245,
C246 & C228
Check
U248 & L202
NO
NO
YES
NO
YES
YES
Replace
U201
Is
there a short
between Pin 47 and
Pins 14 & 15 of
U201?
Replace U201
Check
FL201, C235,
C237, C236,
CR203 & R211
3.3V
at U201 pins
5, 20, 34&
36
Содержание GP series
Страница 1: ...Professional Portable Radio Detailed Service Manual 6866558D03 P ...
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Страница 5: ...Professional Radio GP Series Service Maintainability Issue July 2007 ...
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Страница 32: ...4 2 Error Codes Notes ...
Страница 33: ...Professional Radio GP Series Keypad and Flex Service Information Issue July 2007 ...
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Страница 48: ...2 8 PCB Schematic Diagrams and Parts List Flexes THIS PAGE INTENTIONALLY LEFT BLANK ...
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Страница 56: ...2 16 PCB Schematic Diagrams and Parts List Keypad THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 59: ...Professional Radio GP Series Power Distribution and Controller Service Information Issue July 2007 ...
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Страница 98: ...3 30 Controller Set 4 PCB 8416256H02 UHF Controller Audio Power Amplifier Schematic Diagram ...
Страница 100: ...3 32 Controller Set 5 PCB 8486743Z02 UHF Intentionally left blank Controller ASFIC ON_OFF Schematic Diagram ...
Страница 101: ...Controller Set 5 PCB 8486743Z02 UHF 3 33 Controller Micro Processor Schematic Diagram ...
Страница 102: ...3 34 Controller Set 5 PCB 8486743Z02 UHF Controller Interface Schematic Diagram ...
Страница 103: ...Controller Set 5 PCB 8486743Z02 UHF 3 35 Controller Audio Power Amplifier Schematic Diagram ...
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Страница 109: ...Professional Radio GP Series UHF 403 470MHz Narrow Band 450 470MHz Service Information Issue July 2007 ...
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Страница 260: ...3 116 Circuit Board Schematic Diagrams and Parts List PCB No 8415234H05 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 270: ...3 126 UHF PCB 8415234H05 EPP Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
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Страница 293: ...UHF PCB 8486743Z02 Schematics 3 149 UHF 403 470 MHz Receiver Front End Schematic Diagram ...
Страница 294: ...3 150 UHF PCB 8486743Z02 Schematics UHF 403 470 MHz Receiver Back End Schematic Diagram ...
Страница 295: ...UHF PCB 8486743Z02 Schematics 3 151 UHF 403 470 MHz Synthesizer Schematic Diagram ...
Страница 296: ...3 152 UHF PCB 8486743Z02 Schematics UHF 403 470 MHz Voltage Controlled Oscillator Schematic Diagram ...
Страница 297: ...UHF PCB 8486743Z02 Schematics 3 153 UHF 403 470 MHz Transmitter Schematic Diagram ...
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Страница 325: ...Professional Radio GP Series UHF2 450 527MHz Service Information Issue July 2007 ...
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Страница 441: ...Professional Radio GP Series 800 MHz 806 870MHz Service Information Issue July 2007 ...
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Страница 464: ...3 2 800MHz PCB schematics Parts list THIS PAGE INTENTIONALLY LEFT BLANK ...