[TechAssist] Re: Zenith IQB32B44
- From: "techforce" <techforce@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 26 Jan 2002 08:59:09 -0500
Could be A bad HOT? Are the Voltages on the Secondary of the SMPS jumping
in sync with the Chirp?
If so, try lifting the cathodes of all the Rectifier diodes off the
Secondary of the SMPS Xfmr (if there is one) and leave them floatng.
You ought to be able to power on the Set like that, then see if the chirping
changes. This will tell you if your problem is in the SMPS or beyond the
SMPS. Seems to work for me when I do monitors, might be something you can
try.
Steve
Technotronic Dimensions, NY (USA)
www.100megspop2.com/techforce
1-877-817-9885
----- Original Message -----
From: <tvdoctors@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, January 25, 2002 1:17 PM
Subject: [TechAssist] Zenith IQB32B44
> Fairly new 32" Zenith. No schematic. Turn unit on and all it does is make
a chirping noise for the Horizontal circuit. Osc. and Output of horiz.
tries to come on as well as secondaries. Screen voltage supply seems to not
get over 130 volts when turned on. My B+ is 130 volts. Anyone run into this
problem before? Neil
>
> TV Doctors 108 W. Main St. Monroe,Wa. 98272 360-794-6469
>
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