[TechAssist] Re: Zenith A32B41W 32" TV main module 9-2003 low red output FIX
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 9 Dec 2003 17:53:38 -0500
This one turned out to be the resistor R5143 (120Kohm, 1/2w)on the CRT
board. Thanks guys for reminding me that you have to lift these to test
them.
BTW, Jeff, I searched the Tech Repair database and get nothing on the model
or the board number. Tried again and got the same result. Has this been
added recently or is my database corrupt?
Leonard G. Caillouet
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
original message:
This appears to have a bad videoprocessor U1201 TA1268N. The CRT tests fine
(at least for a zenith), the video buffers and amps on all three lines and
all related parts are OK but I get no effect when adjusting the red in the
service menu. The red output from the TA1268N has blue in it and will not
change with adjustment. The output at that point looks compressed and
clipped. I can't see anything else that might account for this but have run
into enough wierd CRT bias and drive problems in Zeniths that I thought I
would ask. TA1268N is a high failure part and I have seen some strange
stuff with it but never this one. Anyone ever run into something like this?
Leonard G. Caillouet
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
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