
3-6
TROUBLESHOOTING CHARTS
3.0
Troubleshooting Flow Chart for UHF 40W Transmitter
No
Is Q4441 OK ?
Yes
Is drive from VCO
>+4dBm?
No
Is voltage drop across
R4497 >4.5V ?
No
Check Q4431 gate(open)
and drain resistances
(11kohm)
No
Check Q4421 gate(open)
and drain resistances
(11kohm)
No
Check
PCIC_MOSBIAS_1
No
No
Change
Q4473
START
No power
Is Vctrl
there?
Is Q4473
OK?
Check voltage
on Pin 5 U4501
Check R4422-5
and go back to top
Troubleshoot
ASFIC
Check voltage
on TP4531
Change
PCIC
Check R4409 &
R4473 and go back
to top
Check
MOSBIAS_2
Check
ASFIC
Are D4471 &
D4472 OK?
Change
D4471 &
D4472
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check
PCIC
Yes
Change Q4421
Change Q4431
Yes
Change U4401
Yes
Do visual check
on all components
No
Change Q4441
Troubleshoot
VCO
No
Check voltage
Check voltage
on Pin 4 U4501
OK?
OK?
OK?
OK?
OK?
OK?
OK?
Содержание 6864115B62-C
Страница 1: ...Professional Radio GM Series Detailed Service Manual 6864115B62 C ...
Страница 2: ...ii ...
Страница 4: ...iv ...
Страница 5: ...Professional Radio GM Series Service Maintainability Issue July 2007 ...
Страница 8: ...ii ...
Страница 22: ...2 10 MAINTENANCE ...
Страница 25: ...Professional Radio GM Series Controlhead Service Information Issue July 2007 ...
Страница 77: ...Professional Radio GM Series Controller Service Information Issue May 2007 ...
Страница 100: ...2 2 TROUBLESHOOTING CHARTS ...
Страница 104: ...3 4 Controller schematics parts list ...
Страница 154: ...3 52 Controller T12 Schematic Diagrams ...
Страница 155: ...Professional Radio GM Series VHF 136 174MHz Service Information Issue May 2007 ...
Страница 164: ...1 6 MODEL CHART AND TECHNICAL SPECIFICATIONS ...
Страница 176: ...2 12 THEORY OF OPERATION ...
Страница 186: ...3 10 TROUBLESHOOTING CHARTS ...
Страница 190: ...4 4 VHF PCB SCHEMATICS PARTS LISTS ...
Страница 252: ...4 66 VHF 1 25W PCB 8471235L02 Schematics VHF 136 174 MHz IF ...
Страница 256: ...4 70 VHF 1 25W PCB 8471235L02 Schematics ...
Страница 257: ...Professional Radio GM Series UHF 403 470MHz Service Information Issue May 2007 ...
Страница 266: ...1 6 MODEL CHART AND TECHNICAL SPECIFICATIONS ...
Страница 349: ...Professional Radio GM Series LB1 29 6 36 0MHz LB2 36 0 42 0MHz LB3 42 0 50 0MHz Service Information Issue May 2007 ...
Страница 366: ...2 12 THEORY OF OPERATION ...
Страница 372: ...3 6 Low Band TROUBLESHOOTING CHARTS ...
Страница 376: ...4 4 Low band pcb schematics parts lists ...