[TechAssist] Re: 53SBX59B Hitachi dead
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>, <primetvcr@xxxxxxx>
- Date: Sat, 26 Jan 2002 06:55:34 -0600
just a question, but are you sure that when there's a problem the led's
don't turn red.
al marquardt
ampm@xxxxxxx
----- Original Message -----
From: "jbc" <jbc@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>; <primetvcr@xxxxxxx>
Sent: Friday, January 25, 2002 3:34 PM
Subject: [TechAssist] Re: 53SBX59B Hitachi dead
>
> After spending more time on this unit, AP93 chassis, and downloading
> troubleshooting file
> from Hitachi, which is pretty good, I think this is a computer problem.
>
> The power supply is running, all 8 green LED's are ON, and 1 red one at
normal
> brightness.
> The red one might run extra bright or blink depending on problems.
>
> There is a note that the vertical sweep will be killed if in the IIC
service
> mode.
> The customer said the set went dead when maid was cleaning set.
> One set up mode is entered by hitting INPUT and POWER which in on the
front
> panel, and MENU to exit. The MENU has no effect that I can see.
>
> The POWER button will turn the set ON and OFF.
> The remote will turn set ON but NOT off.
>
> I use the PonyProgram to read the 24C04 EEPROM and the data looks strange.
> Of course I do not know exactly what it should look like as this is my
first set
> of this
> type. It has mostly 00 for five lines and FF for 19 lines.
>
> There is a reset button on the PCB for convergence reset that I have not
pushed
> yet.
>
> I downloaded the schematic, but it is hard to read, but the training
material is
> very good.
>
> This is an interesting problem.
>
> Joe Batchelor
>
> graytv wrote:
>
> > 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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