[TechAssist] Re: Mitsubishi C4A29 blown
- From: "markbrock" <markbrock@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 3 Dec 2003 09:07:09 -0600
not the main filter, its only 47/100v however I've traced it back to the
regulator area, so your on the right track, must be a regulator problem,
I've got a slug of those stk regs in stock, I'll change it out and check
this area for bad diodes, heat, Q' etc. and let you know, this set has
several power supply, judging from all the heat sink'd regulators, not
sure how to tell if the regulators are bad without just replacing them,
unless blown up or obvious shorted legs, ( what a mess to undress this
one ) I'll hit it tomorrow morning, have service calls all day today.
brock
----- Original Message -----
From: "George" <grndmstrg@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, December 03, 2003 1:57 AM
Subject: [TechAssist] Re: Mitsubishi C4A29 blown
> Hows the ac diodes if this is the main filter cap?
>
> George
> Afana Electronics
> Moreno Valley, CA
>
> ----- Original Message -----
> From: "markbrock" <markbrock@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, December 02, 2003 6:39 AM
> Subject: [TechAssist] Re: Mitsubishi C4A29 blown
>
>
> > It blows instantly, no time to see the voltage, not at plug in but at
> > start up, any idea where the red and brown plug marked DG goes ?
> dressed
> > pretty heavy, bottom side goes towards the fly back area, I fear it
may
> be
> > bad and probably should be replaced but I can't check and have no print,
> > wish I did, actually have a paying customer this time !!! thanks for
> the
> > reply.
> > brock
> >
> > ----- Original Message -----
> > From: "Adolph Gower" <agower@xxxxxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, December 02, 2003 6:56 AM
> > Subject: [TechAssist] Re: Mitsubishi C4A29 blown
> >
> >
> > > B+ running to high ? check voltage level at the caps that blew!!!
> > > Adolph Gower
> > > Cordova TV
> > > 10275 Old Placerville Rd. #5
> > > Sacramento, Ca. 95827 (916) 363-6565
> > > ----- Original Message -----
> > > From: "markbrock" <markbrock@xxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: 2003Äê12ÔÂ1ÈÕ 18:35
> > > Subject: [TechAssist] Mitsubishi C4A29 blown
> > >
> > >
> > > > PTV MOdel VS4517S customer said had a high pitch squeel, fired it
> up
> > > and
> > > > saw C4A29 bulge and smoke, replaced it and checked all around
Q4A02,
> > 03,
> > > 05
> > > > all ok, diodes in area ok, fired it up , and the cap blew again,
> this
> > > > time shorting Q4A02, and 03, replaced them both and Q4A05, C4A29,
> and
> > > > 4A25 ( from tips ) now I'm a little gun shy about fireing it up
> agian,
> > > > anything else I need to check, would the fbt cause this ? can't
ring
> > it,
> > > > was wondering if the Q's were weak ? appreciate any help, I've no
> > print
> > > > brock
> > > > Brock Electronics
> > > > R.R.4 box 237
> > > > 5208 cr.3385
> > > > Independence Ks. 67301
> > > > 620-331-0235
> > > > fax 331-7191
> > > >
> > > > markbrock@xxxxxxxxxxxxx
> > > > Zenith*Philips*Peavey*Fender*Crate
> > > > we work on all brands,makes,models
> > > > of anything that plugs in the wall
> > > >
> > > >
> > >
> >
>
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