
3-6
TROUBLESHOOTING CHARTS
3.0
Troubleshooting Flow Chart for 45W Transmitter (Sheet 1 of 2)
Current
increase
when keyed?
NO
YES
START
No or too low Power when keyed
Check Components between
Q3441 and RF Output, Antenna
Switch D3471,D3472
>500mA & <5A
>5A
<500mA
Check PA Stages
Control
Voltage at
TP3402
>1V
>1V
<1V
Check
Voltage at
PCIC U3501
Pin 4
Check Components
between TP3402 and
U3501 Pin 4
Short TP3403
to Ground
NO
YES
Voltage at
TP3402
rises?
Check PA Stages
NO
YES
PCIC U3501
Pin 15 9.3V
DC?
Check 9.3 V Regulator
U0641
NO
YES
PCIC U3501
Pin 16 >4V
DC
Replace PCIC
U3501
NO
YES
TP3404
9.1V DC
If U3201 Pin 3 is high,
replace PCIC
U3501,otherwise
check controller and
FGU
YES
NO
TP3403
>0.5V DC?
Replace PCIC U3501
Check Forward & Reverse
Power Sense Circuitry
(D3451 & D3452)
Check Forward & Reverse
Power Sense Circuitry
(D3451 & D3452)
NO
YES
PCIC U3501
Pin 5 > 1V
DC?
Check Power Setting,
Tuning & Components
between PCIC Pin 5
and ASFIC (U0221) Pin
4 before replacing
ASFIC
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 ...