19
5. Horizontal Output Circuit
Is
B+ line voltage
normal?
Is
Q505 base
waveform
normal?
Trouble in power
supply circuit
Refer to trouble
in power supply
unit
Trouble in FBT
Trouble in Horizontal
output circuit
(No Raster)
Yes
No
Q501 and its
ambient circuit
Trouble in Q501, T501
If the holddown circuit stops the
horizontal oscillator during the check,
turn off the power then turn on again
about 10 seconds later
Yes
Yes
Yes
Check the circuit of
P. S. U
No
Trouble in IC501
Yes
Trouble in H.sync line
11V p-p
4V p-p
14.5Vp-p
Yes
Is
Q504 Gate
waveform
normal?
Is
the input H.sync
correct?
Is
IC501 pin8
H.DRV waveform
normal?
Is
IC501 pin10
voltage about
12V?
No
No
No
No
MODE
B+ Voltage
VGA 73.2V
dc
54KHz 117.4V dc
68KHz 148.9V dc
Summary of Contents for 529B
Page 1: ...ServiceManual XGA COLOR MONITOR Model 529B DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...
Page 32: ...30 PCB LAYOUT Main PCB Component Side...
Page 33: ...31 Main PCB Solder Side...
Page 34: ...32 CRT PCB Component Side CRT PCB Solder Side...
Page 35: ...33 SCHEMATIC DIAGRAM Power Connection section...
Page 36: ...34 Control Vertical Out section...
Page 37: ...35 Horizontal section...
Page 38: ...36 Video section...
