R
[email protected]
- Jan 1, 1970
- 0
LG ctv model CT-25Q26ET
LOPT
6174Z-6012R
JBK18
Fault - Black screen, no picture or on-screen display. Sound O.K.
If I short the red, green and blue pins on the crt to ground, I get a
full screen of that colour.
During that time I can barely see a faint tv program picure.
Adjusting the screen control makes no difference to the brightness, but
the focus control does
make some differnce.
Is low EHT from the transformer the likely cause?
I do not have a high voltage probe.
After I turn off the ctv, I can get very little spark when I discharge
the picture tube.
Other voltages from the transformer and the B+ appear to be O.K.
Can anyone suggest anything else I should check before ordering a new
transformer?
Thanks,
Russell Griffiths.
LOPT
6174Z-6012R
JBK18
Fault - Black screen, no picture or on-screen display. Sound O.K.
If I short the red, green and blue pins on the crt to ground, I get a
full screen of that colour.
During that time I can barely see a faint tv program picure.
Adjusting the screen control makes no difference to the brightness, but
the focus control does
make some differnce.
Is low EHT from the transformer the likely cause?
I do not have a high voltage probe.
After I turn off the ctv, I can get very little spark when I discharge
the picture tube.
Other voltages from the transformer and the B+ appear to be O.K.
Can anyone suggest anything else I should check before ordering a new
transformer?
Thanks,
Russell Griffiths.