[TechAssist] Re: 53SBX59B Hitachi dead
- From: jbc <jbc@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 29 Jan 2002 13:31:47 -0600
Well, sometimes when I know the answer I just do not listen to what is being
said.
All of the LED test diodes are working. All power supplies probably are good.
I have not checked the regulator, because I assume that it is working.
Joe Batchelor
Ralph Dorsey wrote:
> I just had one of these yesterday with the same problem. Changed a few
> caps in the supply and the regulater chip Strm6511 (i think). Works great.
>
> Bill McFarland wrote:
>
> >I have also done a few of these in the home.
> >
> >It is almost always that regulator IC. I think there are two caps in the
> >primary of the SMPS I change as well.
> >
> >Just my two cents.
> >
> >PS There are so many good tech's on this list its hard to help! Usually
> >someone has already posted what I would have posted. So I am just trying to
> >give as much as I take.
> >
> >Good luck, God Bless
> >Bill McFarland
> >DMC Electronics
> >Salt Lake City, Utah
> >
> >----- Original Message -----
> >From: graytv <graytv@xxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Friday, January 25, 2002 2:10 PM
> >Subject: [TechAssist] Re: 53SBX59B Hitachi dead
> >
> >
> >>Hi JBC,
> >>I recently had a Hitachi PTV in the shop with the LED's in the power
> >>
> >supply
> >
> >>that are supposed to help in troubleshooting. Used these and the flow
> >>
> >charts
> >
> >>from Hitachi, which told me that the power supply was ok and there was a
> >>secondary load holding the power supply down. Wasted a lot of time
> >>
> >checking
> >
> >>each line and found nothing. Replaced the reglator (and a couple of
> >>borderline caps), and the set fire up and has not come back.
> >>Just my experience with these beasts.
> >>Good luck, Russ Gray
> >>Gray's Electronics Inc.
> >>
> >>----- Original Message -----
> >>From: jbc <jbc@xxxxxxxxxx>
> >>To: <techassist@xxxxxxxxxxxxx>
> >>Sent: Thursday, January 24, 2002 10:29 AM
> >>Subject: [TechAssist] 53SBX59B Hitachi dead
> >>
> >>
> >>>53SBX59B Hitachi dead.
> >>>8 green LED' s light up. All supplies seem good.
> >>>
> >>>No vert sweep. Voltages on output IC seen normal.
> >>>No picture
> >>>No sound
> >>>No OSD
> >>>
> >>>I have downloaded the schematic from Hitachi, but it is chopped up in
> >>>
> >many
> >
> >>>sections.
> >>>The vertical drive will jump across many pages and goes back to the
> >>>
> >Signal
> >
> >>PCB
> >>
> >>>on plug PSD2-10
> >>>but from there who knows where.
> >>>
> >>>There are almost no tips on the Hitachi website.
> >>>
> >>>I have not found the vertical oscillator. Still looking.
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
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