[TechAssist] Re: Needed vertical out section print on Mitsubishi CS-35205A
- From: armando guerra <birdie@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 07 Apr 2004 11:52:40 -0700
Does this set use the LA7838 or the TA8427? On the LA7838.usually pin 1 should
have 12v and pin 8 should be at 28v.There has to be a low ohm resistor off the
flyback that feeds the vcc to the ic.If you cannot find any open resistors near
the fly area,maybe the resistor is ok but you may have an open trace from that
res. to pin 8 of the ic.I would follow the path from pin 8 back toward the
flyback area and check for any breaks.
Maybe its R 506 or R552 and D552.HTH
Mando
Birdie's TV & Electronics
Casa Grande,AZ
Dave Huston wrote:
> Jeff,
> The only number I find on the chassis is 920A40318. I Googled this number
> with no results. It appears the problem is the 28v supply going to pin 8 of
> the v.out chip. It's not there and I've tried to trace it back to the IFT
> only to come to dead ends. This should be simple but all resistors near the
> fly check OK. Not sure where to go from here.....
> Dave Huston
> Huston TV & Electronics
> 2846 Marion-Cardington Rd.E.
> Marion,Oh 43302-8919
> Phone/Fax: 740-389-5726
> email: HustonTV@xxxxxxxxxxxxxx
> ----- Original Message -----
> From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, April 07, 2004 7:52 AM
> Subject: [TechAssist] Re: Needed vertical out section print on Mitsubishi
> CS-35205A
>
> Can you see a chassis ID number anywhere inside? JU-0?
>
> ==========================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> 860-399-1861
> 860-664-3535 (fax)
> jstielau@xxxxxxxx
> ========================
> "If you push something hard enough it will fall over."
> Fudd's First Law of Opposition - Sir Sidney Fudd
>
> ----- Original Message -----
> From: "Dave Huston" <HustonTV@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, April 06, 2004 7:34 PM
> Subject: [TechAssist] Re: Needed vertical out section print on Mitsubishi
> CS-35205A
>
> > Hugh,
> > Yes, I double checked the model number twice since I couldn't find any
> > schematic listed. It uses a LA7838 for IC401. Pin 1 has aprox. 12vdc but I
> > find nil voltage on pin 8. Not sure what voltages to look for.
> >
> > Dave Huston
> > Huston TV & Electronics
> > 2846 Marion-Cardington Rd.E.
> > Marion,Oh 43302-8919
> > Phone/Fax: 740-389-5726
> > email: HustonTV@xxxxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Hugh @ Main TV" <maintv2004@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, April 06, 2004 7:23 PM
> > Subject: [TechAssist] Re: Needed vertical out section print on Mitsubishi
> > CS-35205A
> >
> >
> > I could not find this model number on the Mitsubishi TV list--is this
> > correct number?
> >
> >
> > Hugh Thornley
> > maintv2004@xxxxxxxxxxx
> > Main TV
> > 636 Main St
> > Longmont, Co 80501
> > 303-776-6955 Tel
> > 303-776-0792 Fax
> > ----- Original Message -----
> > From: "Dave Huston" <HustonTV@xxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, April 06, 2004 2:49 PM
> > Subject: [TechAssist] Needed vertical out section print on Mitsubishi
> > CS-35205A
> >
> >
> > > No vert sweep. I replaced the vert. out. chip (was blown out) & a couple
> > > caps that esr'd bad. Can't seem to trace the B+ supply lines without the
> > > print. Can't find a print anywhere. Any help is appreciated.
> > >
> > > Dave Huston
> > > Huston TV & Electronics
> > > 2846 Marion-Cardington Rd.E.
> > > Marion,Oh 43302-8919
> > > Phone/Fax: 740-389-5726
> > > email: HustonTV@xxxxxxxxxxxxxx
> > >
> > >
> > >
> >
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