[TechAssist] Re: magnovox ts2575 c121
- From: "C&W Electronics" <c_w_electronics@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 09 Oct 2001 19:53:01 -0500
Albert,
Change the vertical IC7401 STV9379FA OEM# 9322 1214 7687. This IC is powered
by +11v, -11v from aux p/s & 40v from IHVT. Also two waveforms from
IC7250(TDA8844). If R3488(4.7 ohm 1/2w) is open, it will cause the same
symptom. DON'T USE A SONY STV9379, IT WILL NOT WORK. It must have the FA
extension at the last, if you use a generic.
The voltages & waveforms to the IC can be measured with the IC out of the
circuit. It will still shut down, but you will get a temporary voltage at
the IC pads.(if the supply voltages are working).
Paul W
C&W Electronics
From: "albert marquardt" <ampm@xxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] magnovox ts2575 c121
Date: Tue, 9 Oct 2001 09:03:42 -0700
chassis # 25f800 7583. only two years old, don't have manual yet could use
some help.when turned on the degause relay clicks once then a pause then
several times. 129v on hot cllector so i think regulator is working. checked
vertical supply resistor and diode.did anyone see this symptom before.not
sure if it is shutting down or not starting. no high voltage can be heard.
thanks al
al marquardt
ampm@xxxxxxx
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