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Repair Flow Chart
40
109P2 GS3 CM25
A. Power Supply Failure
1. Sympton :
no startup sound
LED light off
check 7121 pin1
Waveform right?
check 7121
pin2
Ok
NO
check 7121
pin 3
check
1103/6101/
7121 pin3/2103
Ok
NO
check
3121/3123
replace 7121
NO
check 7121
pin4
check 6125
2. Sympton :
hicup mode with
startup sound or
blinking LED
check 3121,3123,3125
check 7121
pin 4
check 6161
Ok
replace 7121
check
6111/3106/
3111/7111
Ok
NO
OK
No
replace 5130
No
check 7143 pin3
voltage dip
check 7143 pin1
12V< pin1 < 15V
check 7121
pin 1
Ok
check
6152/3151/3153
7151/2142
No
check
+5V loading current
Turn power off
check the resistance for
all output v210,
80,+15,-15,+6.3,+5V,check
6131,6133,6134,6137,6139
replace 5130
check
7141/7155/7144/7151
3. Sympton:
abnormal sound
check 7121
drain waveform
right?
check
frequency
Ok
Ok
No
check
6104/3104/3105
2103/2104/2121
replace 5130
No
OK
Ok
9
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