Daewoo 103FH, Service Manual

Page: 28 / 58

26
9. Abnormal Picture
9-1. Horizontal Size
Is the
changeable the
B+ line voltage?
Is the
gate voltage
of the Q521
correct?
OK
Trouble in D507, D520.
Abnormal
H. Size
Yes
No
Is the
waveform of the
pin6 in IC505
correct?
NO
Check the Q520, D505
and their ambient circuit.
Check the IC508, Q506
and their ambient circuit.
Yes
NO
Yes
NO
Yes
NO
Yes
Trouble in IC501.
226V
0
Yes
Control the VR501.
Check the pin 2 in IC505.
No
Is the
waveform of the
pin4 in IC505
correct?
Is the
waveform of the
pin1 in IC504
correct?
Is the
waveform of the
pin9 in IC501(E/W)
correct?
12V
0
3.0V
10V
1.4V
3.1V
2.6V
8V
7.5V
0
0
0
*At first, adjust controls in the OSD MENU.