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
1101/6101/
7101/2106
Ok
NO
check
1106
3123/3125
replace 7102
NO
check 7102
pin6 output ?
OVP possibly active
check 6107
2. Sympton :
hicup mode with
startup sound or
blinking LED
OCP possibly active
check 3115
3122,3121,7104,6111
check 7102
pin 1 < 13.5V
check 7111
open circuit
Ok
replace 7102
check
6165/3107/
3105/7101
Ok
NO
OK
No
replace 5113
No
check 7102
pin 5
Ok
Turn power off
check the resistance for
all output v180,
83,13,-13,+6.3,+5,+8 V
check 6131~6136 short?
replace 5113
check
7112/7115/7116
No
OK
7102 pin4 DEMAG
possibly active
short 7116 pinC
check CPU pin 20
and 7805 emitter
Ok
check
6107
check
pin6>8V
9
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M32 107T4 GS_3
46