Technical information

25
MODE B+ Voltage
31KHz 60Vdc
37KHz 70Vdc
43KHz 80Vdc
54KHz 105Vdc
60KHz 120Vdc
68KHz 145Vdc
24
9-2. Vertical Size
Is
changeable the
Waveform of
IC401 pin 1?
Trouble in R407, C404
Check the IC501
and its ambient circuit
No
No
Trouble V.OSC/
Deflection Circuit
Refer to V.OSC/Deflection circuit
Yes
Is changeable the
DC level of pin
23 of the IC501?
Yes
Abnormal
V.Size
9 . Abnormal Picture
9-1. Horizontal Size
Trouble in L504,
C520 or their ambient
circuit
Trouble in Horizontal
output circuit
Check the B+ and
anode voltage of CRT.
Trouble in H.OSC/
Deflection Circuit
Refer to Horizontal Output circuit
Is
the DC level
of the base of Q517
changeable?
No
Yes
Is
the DC level
of IC501 pin 24
changeable ?
Yes
Check IC501
pin 24
Is the
collector pulse
of Q505 correct?
Is the
cathode waveform
of D509
correct?
Abnormal
H.Size
=1100Vp-p
80-310Vpp
* Normally anode voltage
of CRT is approximately,
25 KV
* Scan B+ are as follow :
No
Yes
Yes
No
*
At first, adjust controls in the OSD Menu