Daewoo 712B Service Manual page 27

9. Abnormal Picture
9-1. Horizontal Size
Abnormal
H.Size
When
the VR501 is
changed, is the H.size
changed?
Yes
Is the
H.Size overscan at 60KHz
and Max. H.Size
in OSD Menu?
Yes
It isn't out of order.
Check pin 15 of IC501
No
and its ambient circuit
(D547, R552, R553, C553)
1.Check B+ section of TDA9111
No
and its ambient circuit.
2.Check Q546 and its ambient
circuit.
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