[TechAssist] Re: Fw: MitsubishiCK3514R dead-no micro action FIXED
- From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 11 Jan 2002 19:03:38 -0500
Have a good laugh......
I get back out to scope this TV, press the Power button, hear the degauss
relay click, then hit it again-no response. Whaaaat? So I take off my
glasses so I can read the fine print and the button I've been pressing
doesn't have the word "Power" over it.....it has the word Degauss.
Anyways I find the actual power button on it, jumper it and Tv fires up--bad
power switch. Swap another switch to verify it works, it does. Now I go
after the NO Remote condition. Using a Zenith Universal I try all codes for
Mits--none activate the Tv. However, the INT line does show digital pulses
getting to the micro. I always thought the Zenith Universal remotes worked
on Mits TVs, but now I'm having second thoughts. Sure wish I had brought my
remote from home.
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "al" <alleathe@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, January 10, 2002 11:47 AM
Subject: [TechAssist] Re: Fw: MitsubishiCK3514R dead-no micro action FIXED
>
> 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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