48
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Repair Flow Chart (Continued)
V50 109B5
E. CPU
check list
check cpu pin 6/pin 5=5V
pin 8/pin 9=12MhZ
pin27 pin20
normal
hi
hi
off
low
hi
18. Hunlock
check pin 4
pwm from 0V to 5V
1. Basic Check
2. H-Centering
check Q1-Q5
low : 0
hi :1
3. ABL-Adj
4. H-linearity
14~10
(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
20,27 P.S.
LED
check pin20/27
19. Blank
check pin19
normal : low
change timing : Hi
109B5 S-CAPACITOR
SWITCH
TABLE
Hor. Freq.(KHz)
Q5
Q4
Q3
Q2
Q1
~
33.24
0
0
0
0
0
33.24~36.51
0
0
1
1
1
36.51~40.60
0
1
1
0
0
40.60~45.07
1
0
0
0
0
45.07~47.62
1
0
0
1
1
47.62~51.49
1
0
1
1
0
51.49~55.07
1
0
1
1
1
55.07~61.96
1
1
0
0
0
61.96~66.29
1
1
0
1
0
66.29~74.32
1
1
0
1
1
74.32~82.96
1
1
1
0
1
82.96~89.00
1
1
1
1
0
89.00~0xffff
1
1
1
1
1
Summary of Contents for V50 109B5
Page 7: ...9 Go to cover page 7 V500 109B5 Wiring Diagram ...
Page 25: ...C B A Of Video Board 25 9 Go to cover page V50 109B5 ...
Page 29: ...C B A Of Main Board 29 9 Go to cover page V50 109B5 ...
Page 30: ...30 V50 109B5 9 Go to cover page C B A Of Main Board ...
Page 34: ...34 V50 109B5 Control Panel board C B A 9 Go to cover page ...
Page 36: ...36 V50 109B5 MHR board C B A 9 Go to cover page ...