44
V50 109B5
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A. Power Supply Failure
1. Symptom :
no startup sound
LED light off
check 7102 pin8
140V<pin8<360V
NO
check 7102
pin 1=11V
check
1101/6101/
7101
replace 7102
NO
check 7102
Pin6 output ?
2. Symptom :
hiccup mode with
startup sound or
blinking LED
OCP possibly active
check 3108,3109,
3110,6106,3113
Ok
replace 7102
check
6113/3125/
3105101
Ok
NO
check 7114 pin3
voltage dip
check 7114 pin1
7.5V< pin1 < 8V
check 7102
pin 5
check
6146/3153/7115
3154/7116/2142
No
check
+5V loading current
Turn power off
check the resistance for
all output v190,
83,12,-12,+6.3,+5,+8 V
check 6131,
6133~6136 short?
replace 5113
3. Symptom:
abnormal sound
check 7101
drain waveform
right?
check
frequency
F=30KHz~97KHz
Ok
Ok
No
check
6103/3104/
2111/3131
replace 5113
No
OK
Ok
Repair Flow Chart
Содержание V50 109B5
Страница 7: ...9 Go to cover page 7 V500 109B5 Wiring Diagram ...
Страница 25: ...C B A Of Video Board 25 9 Go to cover page V50 109B5 ...
Страница 29: ...C B A Of Main Board 29 9 Go to cover page V50 109B5 ...
Страница 30: ...30 V50 109B5 9 Go to cover page C B A Of Main Board ...
Страница 34: ...34 V50 109B5 Control Panel board C B A 9 Go to cover page ...
Страница 36: ...36 V50 109B5 MHR board C B A 9 Go to cover page ...