Hallo!
I bought a used Philips 109B.
When it is cold, after few seconds it zooms in and fades out, and the screen
is black.
What could it be? A condenser?
Thank you
E. - Italy

"Equinox" wrote in message
...
Hallo!
I bought a used Philips 109B.
When it is cold, after few seconds it zooms in and fades out, and the
screen is black.
What could it be? A condenser?
Thank you
E. - Italy

Sounds like the HV to the CRT final anode is dying off. Could be almost
anything ...

Arfa

"Arfa Daily" ha scritto nel messaggio
...

"Equinox" wrote in message
...
Hallo!
I bought a used Philips 109B.
When it is cold, after few seconds it zooms in and fades out, and the
screen is black.
What could it be? A condenser?
Thank you
E. - Italy

Sounds like the HV to the CRT final anode is dying off. Could be almost
anything ...

Arfa
Thank you.
I forgot to say that when it is not cold (after 5-10 minutes) it works well.
E.

"Equinox" wrote in message
...

"Arfa Daily" ha scritto nel messaggio
...

"Equinox" wrote in message
...
Hallo!
I bought a used Philips 109B.
When it is cold, after few seconds it zooms in and fades out, and the
screen is black.
What could it be? A condenser?
Thank you
E. - Italy

Sounds like the HV to the CRT final anode is dying off. Could be almost
anything ...

Arfa
Thank you.
I forgot to say that when it is not cold (after 5-10 minutes) it works
well.
E.

Then a bad cap, or possibly a bad solder joint, are first favourites.
Shouldn't be that difficult to locate with a can of freezer and a hair
dryer. Does it definitely 'balloon' as it fades ? Often, a fading display on
a CRT monitor, is down to nothing more than bad joints on the tube base
heater pins, but in that case, it is just a gentle fade away to black, with
no real alteration is picture size.

Arfa