19
5. Horizontal Output Circuit
Is the
B+line voltage
over 180V?
Is the H-out
waveform of IC501
normal?
Trouble in B+ Booster Circuit
(Check the B+section of IC501,
Check Q546 and its ambient
circuit).
Trouble in IC501
Trouble in Horizontal
output circuit
(No Raster
Yes
No
Is the Collector
wave form of
Q541 or Q542
normal?
Yes
Yes
Yes
Trouble in Q543 and its
ambient circuit.
Trouble in Q541, Q542
No
No
No
Trouble in Q547 and
its ambient circuit.
10V
0V
11V
0V
66V
Is the Collector
waveform of
Q543 normal?
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...
