
7-13
5-2. Vertical Size
5-3. Horizontal Position
Check whether the amplitude (approx. 6Vp-p~10Vp-p) at CN-DSB pin 12
on the DEF PWB (PWE-624) varies by OSD vertical size control or not ?
・IC501 or IC511 failure.
・Digital control circuit failure. (see item 12)
Check whether the amplitude (approx. 6Vp-p~10Vp-p) at IC421 8 pin
on the DEF PWB (PWE-624) varies by OSD vertical size control or not ?
・IC421 or its ambient circuit failure.
V OSC/DEF circuit failure. (see item 7)
Check the raster position.
Raster centering circuit failure.
・IC501 failure.
・Q504, Q505 or their ambient circuit failure.
・Digital control circuit failure. (see item 12)
NG
OK
NG
OK
NG
OK
v. size max.
pprox.10Vp-p
v. saw wave
v. size min.
pprox. 6Vp-p
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