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Trouble Shooting Chart
Startpoint symptom: No vertical deflection
~1
11'letloriz.nhllifl~
appears on the screen
Check waveform on pin 4 of
IC451
Yes
v
IC451 , C452, DY, D471 , C461 ,
R459, R455, VR451 , C456, R454,
R453, R452, C464, SW220
1-l
lru
1"
-r
'0
iCIOl , R401 , R456, C454,
R402, C401 , C402, R403
-52-
AA1-A
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