Zenith TV IQB32B42W 9-2102 More Info (Black Screen)

[Brad Petria]

Hi,
I have a Zenith 32" TV IQB32B42W 9-2102 in my shop with black screen (menu
can't be seen), but good sound. Customer said picture would come on after a
while, but no more. Since my other post, I discovered that by turning up the
"screen", the picture would come on and remain on even when I return the
"screen" to it's original position. Note: Screen voltage about +370V. The
picture remains on until I turn off the set. Afterwards, I have to do the
same thing (advance "screen") everytime the TV is turned on to get a
picture!!! What may be the cause of this problem?

Thanks in advance, Brad

Tip for your old computer (reduce discard pollution too):

If you can't sell your old computer, don't throw it away. Use it to backup
your software by transferring files/folders from your new computer or laptop
to it. I transferred my Windows folder and other stuff to my old computer
using "PC Link", which I downloaded from www.simtel.net (cool site).

http://www.simtel.net/pub/dl/52792.html (info or download)

 

[David]

Bad picture tube. Once the AKB has an ok to turn the tube on, it will stay
until the set is turned off.

Check the resistors on the crt pcb, something like 180K that go bad or
increase in value. Those can sometimes cause this as well, but usually it
is the picture tube.

David

Brad Petria <bpetria@verizon.net> wrote in message
news:3f8f0ee8.104522@news.bellatlantic.net...

Hi,
I have a Zenith 32" TV IQB32B42W 9-2102 in my shop with black screen
(menu
can't be seen), but good sound. Customer said picture would come on after
a
while, but no more. Since my other post, I discovered that by turning up
the
"screen", the picture would come on and remain on even when I return the
"screen" to it's original position. Note: Screen voltage about +370V.
The
picture remains on until I turn off the set. Afterwards, I have to do the
same thing (advance "screen") everytime the TV is turned on to get a
picture!!! What may be the cause of this problem?

Thanks in advance, Brad

Tip for your old computer (reduce discard pollution too):

If you can't sell your old computer, don't throw it away. Use it to
backup
your software by transferring files/folders from your new computer or
laptop
to it. I transferred my Windows folder and other stuff to my old computer
using "PC Link", which I downloaded from www.simtel.net (cool site).

http://www.simtel.net/pub/dl/52792.html (info or download)

 

[Brad Petria]

Hi,

I want to thank you, David, Andy, and anyone else who offered their help.

I tested the CRT twice and the emission on all guns are in the "good"
zone. The picture does look as though the picture tube is "soft". I
checked the heater V. using a true rms DMM (aok). I also tested most
parts on CRT pcb and related. I checked (made minor adj) the RGB Cut & Gain
via service menu. Via customer menu, if I turn the brightness to minimum, I
can still see the picture (contrast set about 30%). I noticed that adjusting
the brightness from min to max did not make a big change in the brightness as
I have seen in other Zenith sets. Note: "EZ picture" is at "custom".
The SM on this TV does not explain the reason/s for blanking the CRT, such
as caused by low emissions (weak CRT) or other? Note: Loss of V. deflection
is a good reason to blank a CRT.

I remember a Sony TV with an open gun that caused a black screen because
of a "balance detector".

A service magazine that I subscribed to for years has "dried up". I will
have to buy some books so I can keep up with the latest technology.

Brad

On Thu, 16 Oct 2003 21:03:29 -0500, "David" <dkuhajda@locl.net.spam> wrote:

Bad picture tube. Once the AKB has an ok to turn the tube on, it will stay
until the set is turned off.

Check the resistors on the crt pcb, something like 180K that go bad or
increase in value. Those can sometimes cause this as well, but usually it
is the picture tube.

David

Brad Petria <bpetria@verizon.net> wrote in message
news:3f8f0ee8.104522@news.bellatlantic.net...
Hi,
I have a Zenith 32" TV IQB32B42W 9-2102 in my shop with black screen
(menu
can't be seen), but good sound. Customer said picture would come on after
a
while, but no more. Since my other post, I discovered that by turning up
the
"screen", the picture would come on and remain on even when I return the
"screen" to it's original position. Note: Screen voltage about +370V.
The
picture remains on until I turn off the set. Afterwards, I have to do the
same thing (advance "screen") everytime the TV is turned on to get a
picture!!! What may be the cause of this problem?

Thanks in advance, Brad

Tip for your old computer (reduce discard pollution too):

If you can't sell your old computer, don't throw it away. Use it to
backup
your software by transferring files/folders from your new computer or
laptop
to it. I transferred my Windows folder and other stuff to my old computer
using "PC Link", which I downloaded from www.simtel.net (cool site).

http://www.simtel.net/pub/dl/52792.html (info or download)

 

[David Harris]

bpetria@verizon.net (Brad Petria) wrote in message news:<3f904e0e.520194@news.bellatlantic.net>...

Hi,

I want to thank you, David, Andy, and anyone else who offered their help.

Brad

As a last act of heroism, you might try this:

Lay the TV on it's face and tap the neck of the CRT, to see of you can
dislodge a particle that might be causing your problem. Won't cost
much to try.


David, on the Illinois prairie.