Repair Flow Chart
43
104S CM23 GSIII
E. CPU
check list
check cpu pin4=5V
Pin6/pin7=4MhZ
Pin5=gnd
pin14 pin17
normal
hi
hi
standby
low
hi
off
low
low
27,28,21,20
Hsync/Vsync
10. Hunlock
check sync.
Hin=pin27
Vin=pin28
Hout=pin21
Vout=pin20
Basic Check
check Q1-Q3
Pin13/pin12/pin11
low : 0
hi :1
ABL-CON
11,12,13
(Q3,Q2,Q1)
S-cap switch
check pin2
pwm from 0V to 5V
1. Normal
Fvout=Fvin
Fhout=Fhin
2. sync out of rang
Fhin>54KHz
Fvin>120Hz
check pin10
normal=Hi
blank=low
14, 17 P.S.
LED
check pin14/17
Hor. Freq.(KHz)
Q3
Q2
Q1
~27.00
0
0
0
27.50~33.24
0
0
0
33.24~36.51
0
0
1
36.51~42.38
1
1
0
42.38~47.48
1
0
1
47.48~53.10
1
0
1
53.10~58.25
1
1
1