[TechAssist] Re: Fw: MitsubishiCK3514R dead-no micro action FIXED
- From: al <alleathe@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 10 Jan 2002 11:47:29 -0500
Damon and all,
The degauss relay does NOT go through the IC7X0,that is probably what is
clicking. The IC7X0 is a little micro processor BETWEEN the big micro and
the push buttons.
I spent a lot of time on this and IC7XO is very cheap, at Match-A-Knob. I
have most of the schematics if you want scans,they are a little small, but
another shop was good enough to send them and its all ya gonna get, if you
don't have the manual. My set has a great picture now,should be done today.
Good luck and feel free to e me privately. al
alleathe@xxxxxxxxxxxxx
Al Leatherman
Mine Hill, NJ 07803
973-361-5796
----- Original Message -----
From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, January 10, 2002 7:55 AM
Subject: [TechAssist] Re: Fw: MitsubishiCK3514R dead-no micro action FIXED
>
> I have the same model/chassis I'm going to be working on this week, the
> micro powers up only 1 of 2 relays, and the main ppower relay isn't the
one.
> Q902 does activate the power relay, and I get full power and horiz
> deflection, but not vertical deflection, B+ is present on vert IC.
>
> I suspect IC 7x0 too, as I've had that fail, but the micro is responding
to
> On/Off. So I suspect the micro pin 56 is not sending a Hi. As for the vert
> problem, I'll have to see if the micro problem is the cause of the no
Vert,
> otherwise UPC1498 time.
>
> This is one of the more complicated system control circuits...
> Damon Brunger
> damon101@xxxxxxxxxxxxxx
> Telrad Electronic Services
> Ft Wayne, IN 46815
> ----- Original Message -----
> From: "al" <alleathe@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, January 09, 2002 10:24 PM
> Subject: [TechAssist] Fw: MitsubishiCK3514R dead-no micro action FIXED
>
>
> >
> >
> >
> > > Thanks to my cybertech help, turned out to be IC7XO on circuit board
> with
> > > micro switches in front of cabinet.
> > > This IC is a little microprocessor
> > > that handles remote (infra red) unit, and all micro switches except
> > > degauss., BEFORE the main microprocessor. Windex is probably to blame.
> > > You may e mail me for any details. al
> > >
> > > alleathe@xxxxxxxxxxxxx
> > > Al Leatherman
> > > Mine Hill, NJ 07803
> > > 973-361-5796
> > >
> >
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