7-9
3-2. Vertical
Measure at CN-AF 7 pin (VD) on the VIDEO PWB (PWE-567A)
NG
Check the sync pulse at Mini D-SUB 14pin on the VIDEO
PWB (PWE-567A).
NG
OK
Check the pulse (VD) at IC731 21 pin on the VIDEO PWB
(PWE-567A).
NG
OK
OK
Check V sync
Check the input V sync
Signal cable failure
Check the output pulse
Q7Y3, Q7Y4, Q7Y7, Q7Y8, Q734, Q735, IC731 and their ambient
circuit failure on the VIDEO PWB (PEW-567A).
IC7A1 and their ambient circuit failure on the VIDEO PWB (PWE-567A).
• V OSC/DEF circuit failure (see item 7).
• Digital control circuit failure (see item 12).
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