[TechAssist] Fwd: Message submitted to 'techassist'
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>From: "cesha" <cesha@xxxxxxxxxxxxx>
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>Subject: Re: [TechAssist] Sanyo 31" DS31590 dead, HOT shorted. other???
>Date: Fri, 9 May 2003 13:27:25 -0500
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>
>Philip
>You can only replace this Sanyo transistor w/ Sanyo part # 405-056-8701. No
>substitute can be used in Sanyo TV's. I hope this is the information you
>needed.
>Have a NICE DAY !
>
>GOD Bless,
>Doyott Collins
>Collins Electronic Service
>1122 South Main St.
>Hope, AR 71801-7237
>Ph 870-777-3429
>Fax 928-223-8201
>E-Mail cesha@xxxxxxxxxxxxx
>
>
>
>
>
>
>
>
>----- Original Message -----
>From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Friday, May 09, 2003 9:55 AM
>Subject: [TechAssist] Sanyo 31" DS31590 dead, HOT shorted. other???
>
>
> >
> > Sanyo DS31590 (31590-02 chassis)Came in dead.
> > Customer said no storm at time.Tried to turn on.Must have failed in the
> > off mode.
> > Only damage I found was shorted HOT Q402 (2SD1879). I removed HOT and
> > in place, my 60 watt light bulb from collector of HOT to ground (emitter
> > ckt) for a load.Plugged in set to see standby voltages.Immediately the
> > brightness of my 60W bulb started cycling on/off, averaging about 46VDC
> > in standby.
> > In standby mode with the 60W bulb removed (and no HOT as well) I had a
> > stable +81.5VDC.
> > I reinstalled my bulb to HOT collector and pushed power, and set
> > clicked on with bright light and a stable +126.5V for about 5 seconds
> > and set clicks off.Push power,same 5 seconds then off again.
> > I then replaced the HOT with my new sub HOT D1555 (also an NTE 2331
> > equiv., not exact, but I had a bunch on hand). Stand by volts on
> > collector, +81.5 VDC.
> > Powered unit up with good pix, regulation and sound. My HOT runs barley
> > warm.
> > Close inspection found all good solder in the HV areas,including H drive
> > transformer, tho I reflowed all anyway with solder to be sure.
> > I am wondering if there is any histories on this model where just the
> > hot goes without any other defects?
> > Phil Bader
> > --
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> >
> >
>****************************************************************************
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