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42
109B2 GS3 CM25
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Repair Flow Chart (Continued)
E. CPU
check list
check cpu pin 6/pin 5=5V
pin 8/pin 9=12MhZ
pin27 pin20
normal
hi
hi
standby
hi
low
off
low hi
Fh-khz
Q5 Q4 Q3 Q2 Q1
<31.00
0 0 0
0
0
31.00 ~33.00 0 0 0
0
0
33.00~ 36.30 0 1 0
0
0
36.30 ~40.30 0 1 1
0
0
40.30 ~45.00 1 0 0
0
0
45.00 ~50.20 1 0 0
1
1
50.20 ~56.80 1 0 1
1
0
56.80 ~62.00 1 1 0 0
1
62.00 ~66.00 1 1 0 1
1
66.00 ~71.20 1 1 1 0
0
71.20 ~81.00 1 1 1 0
1
81.00 ~88.00 1 1 1 1
0
> 81.00 1 1 1 1
1
18. Hunlock
check pin 4
pwm from 0V to 5V
Basic Check
2. H-Centering
check Q1-Q5
low : 0
hi :1
3. ABL-Adj
4. H-linearity
14, 13, 12, 11
(Q5,Q4, Q3,
Q2,Q1)
S-cap switch
check pin 3
pwm from 0V to 5V
check pin2
pwm from 0V to 5V
check pin18
normal=Hi
blank=low
27, 20 P.S.
LED
check pin20/27
19. Blank
check pin19
normal : low
change timing : Hi