Repair Flow Chart
86
202P4 M25P
E. CPU
check list
check cpu pin6=5V
pin9/pin8=12MhZ
pin12/pin31=gnd
power saving pin20 pin27
normal
hi
hi
off
low
low
33,34,40,41
Hsync/Vsync
18. Hunlock
check sync.
hin=pin40
vin=pin41
hout=pin34
vout=pin33
check pin4 duty cycle of
pwm from 0% to 100%
Basic Check
2. H-Centering
check Q1~Q6
Pin10~15
low : 0
hi :1
3. ABL-Adj
4. H-linearity
Pin10~15 (S6~S1)
S-cap switch
check pin3 duty cycle of
pwm from 0% to 100%
check pin2 duty cycle of
pwm from 0% to 100%
1. Normal
Fvout=Fvin
FHout=FHin
2. sync out of rang
Fhin>131.5KHz
Fvin>168Hz
check pin18
normal=Low
blank=Hi
20,27 P.S.
LED
check pin20/27
19. Blank
check pin19
normal : low
change timing : Hi
202P130K S-CAPACITOR SWITCH TABLE
Hor. Freq.(KHz)
Q7
Q6
Q5
Q4
Q3
Q2
Q1
~33.00
1
1
1
1
1
1
1
33.00~36.00
0
1
1
1
1
0
1
36.00~42.00
1
0
1
1
0
0
1
42.00~45.00
1
0
1
1
1
1
0
45.00~47.50
0
1
0
0
1
1
0
47.50~49.00
0
1
1
1
0
1
0
49.00~52.00
0
0
0
1
0
1
0
52.00~55.00
1
0
1
0
0
1
0
55.00~58.50
0
1
0
0
0
1
0
58.50~61.50
1
1
0
1
1
0
0
61.50~65.00
1
1
1
0
1
0
0
65.00~70.00
0
0
1
0
1
0
0
70.00~73.00
1
0
0
0
1
0
0
73.00~76.00
0
1
1
1
0
0
0
76.00~80.60
1
0
1
1
0
0
0
80.60~82.50
1
1
0
1
0
0
0
82.50~84.80
0
1
0
1
0
0
0
84.50~88.50
1
0
0
1
0
0
0
88.50~92.50
0
0
0
1
0
0
0
92.50~98.00
1
1
1
0
0
0
0
98.00~102.00
0
1
1
0
0
0
0
102.00~110.00
1
0
1
0
0
0
0
110.00~113.50
1
1
0
0
0
0
0
113.50~122.00
0
1
0
0
0
0
0
122.00~126.50
1
0
0
0
0
0
0
126.50~
0
0
0
0
0
0
0
note: bit0
à
Q1,bit1
à
Q2,bit2
à
Q3,bit3
à
Q4,bit4
à
Q5, bit5
à
Q6, bit6
à
Q7
Q1: Scapacitor1, Q2:Scapacitor2, Q3:Scapacitor3, Q4:Scapacitor4, Q5:Scapacitor5,
Q6:Scapacitor6, Q7:Scapacitor7
Содержание 202P4
Страница 31: ...Terminal Schematic Diagram A1 Go to cover page ...
Страница 33: ......
Страница 34: ......
Страница 35: ...Go to cover page ...
Страница 37: ...Key Control Schematic Diagram 202P4 M25P 32 34 Go to cover page E ...
Страница 39: ...Go to cover page ...
Страница 41: ......
Страница 43: ...Power Schematic Diagram C C1 C6 C2 C7 C3 C4 C5 C9 C8 Go to cover page ...
Страница 45: ...Drive Schematic Diagram 202P4 M25P 32 38 D Go to cover page ...
Страница 91: ...83 202P4 M25P Repair Flow Chart Go to cover page 7 0 2 ...