[TechAssist] Re: Magnavox 25 Y105 Dead/Sams 3370
- From: "Richard La Placa" <continentaltv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 22 Mar 2002 09:54:29 -0800
Walter
Check C432
That's been going bad a lot
Richard
----- Original Message -----
From: walter wood <wwood_38478@xxxxxxxxx>
To: Tech Assist <techassist@xxxxxxxxxxxxx>
Sent: Thursday, March 21, 2002 8:54 PM
Subject: [TechAssist] Magnavox 25 Y105 Dead/Sams 3370
>
>
> >
> > This set was supposedly lightning.
> > Replaced Q400; IC410, Q502, and F401. All bad.
> > Replaced C432 just because.
> > Set checks ok for standby voltages with 172 volts
> > on pin 3 of IC410 and collector Q400.
> > Around 16 volts on pin 2 and 4 of IC 410 and base
> > and emitter Q400.
> > When turned on, high voltage goes to almost 25k
> > and
> > set cuts off.
> > The strange part is that Emitter an Base of Q400
> > and pins 2 and 4 are at 131 volts at this point.
> > Normal run voltage.
> > BUT Collector Q400 and pin 3 of IC410 are at 172
> > volts, Not , according to my schematics, normal
> > run.
> > I have also checked R424,406,432,437,524, and
> > R504.
> >
> > Set can be turned off and back on, but will not
> > stay on, and after several tries, has to be un
> > plugged, to continue. I find nothing in the 3
> > tips
> > programs I have.
> > Hope someone has some ideas. These sets are
> > usually
> > so easy.
> > Thanks
> > Walter
>
>
>
> =====
> Walter Wood
> Future Tech Home Center
> 2786 Hwy. 43 N.
> Lawrenceburg Tn. 38464
> 931-829-3337
> Fax 931-829-4044
> mailto:wwood_38478@xxxxxxxxx
>
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