38
107S2 CM23 GSIII
Repair Flow Chart
A. Power Supply Failure
1. Sympton :
no startup sound
LED light off
check 7102 pin1
100V<pin1<380V
check 7102
pin14 > 2V
Ok
NO
check 7102
pin 8=2.4V
check
1101/6101/
7101/2106
Ok
NO
check
3121/6112/1106
3123/3119/3125
replace 7102
NO
check 7102
pin4 output ?
OVP possibly active
check 6111
2. Sympton :
hicup mode with
startup sound or
blinking LED
OPP possibly active
check 3103,3111~3114
3108,3109,6102,2121
check 7102
pin 6 < 13.5V
check 7111
open circuit
Ok
replace 7102
check
6165/3107/
3105/7101
Ok
NO
OK
No
replace 5113
No
check 7153 pin3
voltage dip
check 7153 pin1
11V< pin1 < 15V
check 7102
pin 5 < 0.5V
Ok
check
6144/3146/3147
3148/7117/2142
No
check
+5V loading current
Turn power off
check the resistance for
all output v180,
80,12,-12,-6,+5,+8 V
check 6131~6136 short?
replace 5113
check
7112/7115/7116/7117
3. Sympton:
abnormal sound
check 7101
drain waveform
right?
check
frequency
F=77KHZ
adjust
3129
No
Ok
Ok
No
check
6103/3104
2107/2111
replace 5113
No
OK
7102 pin14 OOB
possibly active
short 7116 pinC
check CPU pin 22
and 7805 emitter
Ok
No
Ok
check
3115/6107
/6111
check
pin6>8V
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