Bridge rectifier putting out approx 170VDC?: Page 2


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Bridge rectifier putting out approx 170VDC?

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jts1957
Veteran

Mar 22, 2012, 5:44 AM

Post #26 of 32 (1162 views)
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Re: [mel] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

If memory serves I think you'll find the part labeled:

TZ

1167-01

xxx

TZ is a "manufacturer's logo"
1167-01 is all the Zenith part number that would fit (the 121- is to be inferred onto the beginning of this number).
xxx would be date code when used.

-------------------------
Location: Far, Far Away

ajcrm125
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Mar 22, 2012, 1:34 PM

Post #27 of 32 (1158 views)
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Re: [mel] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

Many thanks to Ron and mel for their suggestions. I ordered one of each just in case. I'll post my results once I get them in and install one.
-Adam
==================
http://www.onecircuit.com
==================

Ron.M
Veteran

Apr 9, 2012, 10:58 PM

Post #28 of 32 (1112 views)
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Re: [ajcrm125] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

ajcrm125;....

Wellll , welll , well.....
It's been over 2 weeks (Mar,22) since you posted last....
Have you gotten the transistors yet ???
Did you try one or both of them ???
Did they both blow ???
(I'll bet they did..)...

Any updates you'd care to share with us ???
Sure would appreciate it....
I may have another thing for you to check that could be the problem... Smile

...

Later...Ron.M.... Cool

...
Veteran & Retired TV technician

ajcrm125
New User

Apr 10, 2012, 12:25 AM

Post #29 of 32 (1109 views)
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Re: [Ron.M] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

Well... I tossed in an NTE2353 and it still does the same thing. As soon as I turn it on I hear the relays click on but then off immediately. :(
-Adam
==================
http://www.onecircuit.com
==================

Ron.M
Veteran

Apr 10, 2012, 4:53 PM

Post #30 of 32 (1098 views)
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Re: [ajcrm125] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

ajcrm125;....

I have a couple of other tests I'd like you to run before anybody condems the flyback...
Are you up for that ???
Start with #1;...
The base of the HOT (Horiz Output Transistor) is connected to T3205 , the horiz driver transfomer...
On the primary side of that transformer is Q3206 , the driver transistor...
You'll have to be quick with this test as the TV will turn off quickly & we/I need a reading...
Hook your meter up to the collector pin of Q3206 or the + of CX3274...
Set your meter to + dc volts on a range to read about 15~25 vdc...
Turn the TV on & see if you get a reading....
Please post results...
Did the replacement NTE2353 get warm or hot before the TV turned of ???

Later.....Ron.M.... Cool

....
Veteran & Retired TV technician

ajcrm125
New User

Jul 21, 2012, 1:48 AM

Post #31 of 32 (981 views)
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Re: [Ron.M] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

Hi Ron,
Man I've just been swamped with so many other projects I haven't gotten time to get back to this. And it doesn't look like I'm going to have any more time in the near future. Is it possible to test/repair the chassis outside of the TV?

If so.. would it be possible to send the chassis to you for repair? (depending on the price)

Lemme know...
-Adam
==================
http://www.onecircuit.com
==================

ajcrm125
New User

Sep 5, 2012, 1:54 AM

Post #32 of 32 (934 views)
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Re: [ajcrm125] Bridge rectifier putting out approx 170VDC? [In reply to]	Can't Post

Well I found a cheap flyback online so I replaced it (just in case). No such luck. Still clicks on and then off immediately. :(
-Adam
==================
http://www.onecircuit.com
==================

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