9-2. Vertical Size
Abnormal
V.Size
Is
changeable the
DC voltage of
IC401 pin 1?
Trouble V.OSC/
Deflection Circuit
Refer to V.OSC/Deflection circuit
No
Yes
Check the IC501
and its ambient circuit
Is
Yes
the 3.5Vdc of pin
21of the IC501?
No
25
Check the IC401
and its
ambient circuit