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48
V50 109B5
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E. CPU
1. Basic Check
check list
4. H-linearity
2. H-Centering
19. Blank
14~10
(Q5,Q4, Q3,
Q2,Q1)
S-cap switch
3. ABL-Adj
18. Hunlock
20,27 P.S.
LED
Repair Flow Chart (Continued)
check cpu pin 6/pin 5=5V
pin 8/pin 9=12MhZ
check pin 4
pwm from 0V to 5V
check pin2
pwm from 0V to 5V
check pin19
normal : low
change timing : Hi
check Q1-Q5
low : 0
hi :1
check pin 3
pwm from 0V to 5V
check pin18
normal=Hi
blank=low
check pin20/27
109B5 S-CAPACITOR
Hor. Freq.(KHz)
Q5
0
~ 33.24
33.24~36.51
0
36.51~40.60
0
40.60~45.07
1
45.07~47.62
1
47.62~51.49
1
51.49~55.07
1
55.07~61.96
1
61.96~66.29
1
66.29~74.32
1
74.32~82.96
1
82.96~89.00
1
89.00~0xffff
1
pin27 pin20
normal
hi
hi
off
low
hi
SWITCH
TABLE
Q4
Q3
Q2
Q1
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
1
0
1
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
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