Philips V40 107P5 - Repair Flow Chart; Power Supply Failure Troubleshooting

Repair Flow Chart
A. Power Supply Failure
1. Sympton :
no startup sound
LED light off
check 7102 pin8
100V<pin8<380V
check 7102
pin1 > 2V
Ok
NO
check 7102
pin 5=2.4V
check
1102/6101/
7101/2105
Ok
replace 7102
NO
check 7102
pin6 output ?
OVP possibly active
check 6105
2. Sympton :
hicup mode with
startup sound or
blinking LED
OCP possibly active
check 3109,3108,6106
3115,
check 7102
pin 1 < 13.5V
check 7105
open circuit
Ok
replace 7102
check
3113/
3104/7101
Ok
NO
OK
No
replace 5113
No
check 7102
pin 5
Ok
Turn power off
check the resistance for
all output voltages+190,
83,12,-12,+6.0,+5,
check 6151~6158 short?
replace 5113
check
7155/7152/7154
No
OK
7102 pin4 DEMAG
possibly active
short 7154 pinC
check CPU pin 22
Ok
check
6105
check
pin6>8V
9
Go to cover page
31
V40 107P5
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