Vertical Size - Daewoo Lucoms 719B-3 Service Manual

TROUBLESHOOTING HINTS

8-2. Vertical Size

Abnormal
V.Size
changeable the
DC voltage of
IC301 pin 5 ?
Trouble V.OSC/
Deflection Circuit
Refer to V.OSC/Deflection circuit
Is
No
Yes
Is
the 3.5Vdc of pin
23 of the IC501?
No
Check the pin 23 of IC501
and its ambient circuit
27
Check the IC301
Yes
and its
ambient circuit