41
109B2 GS3 CM25
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Repair Flow Chart (Continued)
D. Vertical Deflection Failure
check
7503
pin 12, 13
basic check
+13/-13V/+78V
Symptom :
one horizontal line
V_size is abnormal
too large/small (small)
check 7404
pin1,pin7 ramp
exist ?
check
+78V,6402,6403
good?
replace
7503
No
Ok
replace
6402, 6403
Ok
No
check
3401,3402
check
6401
Ok
No