25
9. Abnormal Picture
9-1. Horizontal Size
When
the VR501 is
changed, is the H.size
changed?
No
Yes
Check pin 15 of IC501
and its ambient circuit
(D547, R552, R553, C553)
It isn't out of order.
Is the
H.Size overscan at 60KHz
and Max. H.Size
in OSD Menu?
No
Yes
1.Check B+ section of TDA9111
and its ambient circuit.
2.Check Q546 and its ambient
circuit.
Abnormal
H.Size
Summary of Contents for 712B
Page 1: ...ServiceManual XGA COLOR MONITOR Model 712B DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...
Page 34: ...32 PCB LAYOUT Main PCB Component Side...
Page 35: ...33 Main PCB Solder Side...
Page 36: ...34 CRT PCB Component Side...
Page 37: ...35 CRT PCB Solder Side...
Page 38: ...36 SCHEMATIC DIAGRAM Power Section...
Page 39: ...37 Micro controller OSD Vertical Section...
Page 40: ...38 Horizontal Section A...
Page 41: ...39 Horizontal Section B...
Page 42: ...40 Video Section...
