82
201P 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
Ok
replace 7121
check
3106/3111
Ok
NO
OK
No
replace 5130
No
check 7143 pin3
voltage dip
check 7143 pin1
12V< pin1 < 15V
check 7121
pin 1
Ok
check
6147/5131
7135/2163
No
check
+5V loading current
Turn power off
check the resistance for
all output v230,
80,+15,-15,+6.3,+5V,check
6131,6133,6134,6137,6139
replace 5130
check
7141/7155/7144
3. Sympton:
abnormal sound
check 7121
drain waveform
right?
check
frequency
Ok
Ok
No
check
6104/3104/3105
2103/2104/3106
replace 5130
No
OK
Ok
Repair Flow Chart
Summary of Contents for 202P4
Page 31: ...Terminal Schematic Diagram A1 Go to cover page ...
Page 33: ......
Page 34: ......
Page 35: ...Go to cover page ...
Page 37: ...Key Control Schematic Diagram 202P4 M25P 32 34 Go to cover page E ...
Page 39: ...Go to cover page ...
Page 41: ......
Page 43: ...Power Schematic Diagram C C1 C6 C2 C7 C3 C4 C5 C9 C8 Go to cover page ...
Page 45: ...Drive Schematic Diagram 202P4 M25P 32 38 D Go to cover page ...
Page 91: ...83 202P4 M25P Repair Flow Chart Go to cover page 7 0 2 ...