Repair Flow Chart
44
109P2 GS3 CM25
E. CPU
check list
check cpu pin11/pin32=5V
pin9/pin10=12MhZ
pin12/pin31=gnd
pin7 pin6
normal
hi
hi
standby
hi
low
off
low low
suspend
low hi
13,14,16,17
Hsync/Vsync
18. Hunlock
check sync.
hin=pin13
vin=pin16
hout=pin14
vout=pin17
check pin42
pwm from 0V to 5V
Basic Check
2. H-Centering
check Q1~Q6
Pin20~25
low : 0
hi :1
7. ABL-Adj
1. H-linearity
Pin20~25 (S6~S1)
S-cap switch
check pin29
pwm from 0V to 5V
check pin28
pwm from 0V to 5V
1. Normal
Fvout=Fvin
2. sync out of rang
Fhin>110KHz
Fvin>160Hz
check pin18
normal=Hi
blank=low
6.7 P.S.
LED
check pin6/7
3. Blank
check pin2
normal : low
change timing : Hi
Hor. Freq.(KHz)
Q6
Q5
Q4
Q3
Q2
Q1
~33.00
1
1
1
1
1
1
33.00~36.00
0
0
0
0
1
1
36.00~42.00
0
0
0
1
0
1
42.00~45.00
0
0
1
1
1
0
45.00~47.50
0
1
1
0
1
0
47.50~49.00
1
0
1
0
1
0
49.00~52.00
1
0
0
0
1
0
52.00~55.00
0
0
0
0
1
0
55.00~58.50
1
1
1
1
0
0
58.50~61.50
0
1
1
1
0
0
61.50~65.00
1
1
0
1
0
0
65.00~70.00
0
0
0
1
0
0
70.00~73.00
0
0
0
1
0
0
73.00~76.00
0
1
1
0
0
0
76.00~82.50
1
0
1
0
0
0
82.50~88.50
0
0
1
0
0
0
88.50~98.00
1
1
0
0
0
0
98.00~102.00
1
0
0
0
0
0
102.00~111.00
0
0
0
0
0
0
111.00~
0
0
0
0
0
0
9
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