15
TROUBLESHOOTING HINTS
1. No Character
Are the
Contrast &
Brightness Controls
maximum?
Change the Contrast &
Brightness control value to
maximum
No Raster
Refer to
No Raster
Check the peripheral circuit
of CRT
Check the video output
circuit and IC801 (pin 5,7,9)
and their ambient circuit
Trouble in 8Vdc line
of the Main PWB
Check the clamping pulse
circuit
Check the signal cable
No Character
Is whole
screen bright?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
Rk, Gk, Bk
About 45Vpp
No
No
Is CRT
Cathode (Rk, Gk, Bk)
signal level
normal?
Is the
output signal of the
(pin 14, 16, 19) pre-amp
IC801, normal?
Is clamping
pulse (pin 12 of IC801)
normal?
Is 12Vdc line
normal?
Is input signal
normal?
Trouble in IC801 and
its ambient circuit
12Vpp
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...
