40
104S CM23 GSIII
Repair Flow Chart
B.Video
Repair Flow
check 7099
pin11 HFLB
1.Sympton :
(with wite pattern)
no picture
green LED on
check
EHT=24.5KV
rough check for R,G, B
1. video input= 0.7V
2. 7099video output waveform
3. 1005 video output waveform
Check 7099
pin5 CLBL
check DC restoration
7013,,7033,7053
7014,7034,7054
check 7099 pin24
ABL
check 7099
pin 6,8,10
input swing
check 7011,
7031,7051
pin Base
input swing
Ok
replace IF
cable
No
replace 7099
check
VG1 < -178V
Ok
No
check blanking
7501 pin16
check heater
= + 6 V
Ok
check Xray prot.
7501 pin2
No
check
R,G,B output
1005 pin11
1005 pin8
1005 pin6
Ok
2.Sympton :
no video (or dim),
only raster with/without retrace line
green LED on
check Vg1
Vg1 = 0V
check cathod
+80V,+180V
Ok
check blanking
7051 pin16
No turn down Vg2
check 7012,7032,7052
Pin Collector
Swing
check
7501 pin16
check
VG2 > 350V
Ok
No
Содержание 104S11/00
Страница 67: ...23 1 104S CM23 GSIII VIDEO BOARD PCB Go to cover page Forward Back CLICK HERE FOR COMPONENT LAYER ...
Страница 72: ...PWB MAIN BOARD 27 1 104S CM23 GSIII Go to cover page Forward Back CLICK HERE FOR COMPONENT LAYER ...
Страница 73: ...PWB MAIN BOARD 27 104S CM23 GSIII Go to cover page Forward Back CLICK HERE FOR COPPER PATH LAYER ...