[TechAssist] Re: Magnavox (Funai), CCR190AT03, SMPS Problem
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 14 May 2003 13:06:46 -0400
Check R56 or R44 for open 18K (if this set has them)
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
----- Original Message -----
From: "D Thunhurst" <dthunhurst@xxxxxxx>
To: "TechAssist" <TechAssist@xxxxxxxxxxxxx>
Sent: Wednesday, May 14, 2003 12:51 PM
Subject: [TechAssist] Magnavox (Funai), CCR190AT03, SMPS Problem
>
> Hi,
> Working on a Magnavox CCR190AT03 made by Funai.
> It appears to have a power supply problem. With the set off, my voltage
are
> 6v, 12v, and 115v. When powered on, the 6 and 12 volts are still good but
> the 115 goes to 176 volts. It obviously goes into immediate shut down.
One
> day while tracing it out, it killed the HOT. Before it took out the HOT
and
> before it went into shutdown, I could see it had full vertical deflection
> and no retrace lines. I took the HOT out of circuit and placed a light
bulb
> in its place for load. Power supply is still way too high, eliminating a
> deflection load problem.
> I replaced the opto-coupler, checked all of the resistors in that feedback
> circuit, changed several caps that had high esr and resoldered the usual
bad
> solder joints.
> Anyone have any ideas or suggestions on this piece of art?
> Thanks,
> Daryl
> Daryl's TV
> 3310 Dyer St.
> El Paso, TX 79930
> 915-565-9184
> 915-564-1024 Fax
> dthunhurst@xxxxxxx
> http://dynacomp.freeyellow.com
>
>
>
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