[TechAssist] UPDATE : Mitsubishi CS-40503 has intermittent Vertical collapse after warm-up.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: "TechAssist" <techassist@xxxxxxxxxxxxx>
- Date: Wed, 17 Mar 2004 14:43:09 -0700
Hi members,
I'm still struggling with this 40" Mits.
I need some additional help.
I have replaced the Vertical out IC (LA7833), and repaired all bad looking
connections.
I replaced a couple of E-caps, that I thought for sure would fix the
problem, cause they tested bad.
The problem has shifted from intermittent vertical after warm-up, to a solid
2" vertical deflection problem in the middle.
I need someone to look at the schematic of this set, and provide me with a
list of all the e-caps in the vertical ckt. I may have missed checking one
somewhere along the line. Also, I see that C-454 is missing, but if I
remember correctly, it was never there to start with, unless it fell out
when I removed the solder. If it needs to be there, then I need to know the
correct value, so I can install a new one.
Thanks for taking the time to help me.
I am trying to fix this one on the floor, cause I have no help to lift it
onto the bench.
I have pulled the chassis 3 times, and would like to be more successful on
the 4th attempt.
LLW
LeRoy Westlund
Westlund TV & Electronics
97 North Main "At least I'll go down
Centerfield, UT 84622-0087 swingin,......what a swingin
Ph./Fax 435-528-3822 way to go."
mailto:LLW@xxxxxxxxxx
-----Original Message-----
From: LeRoy Westlund <llw@xxxxxxxxxx>
To: TechAssist <techassist@xxxxxxxxxxxxx>
Date: Friday, March 05, 2004 12:53 PM
Subject: Mitsubishi CS-40503 has intermittent Vertical collapse after
warm-up.
>Hi members,
>This Mitsubishi model CS-40503 has an intermittent vertical problem, after
>warm-up.
>I re-soldered all pins on the LA7833 vertical IC even though they looked
OK,
>and could find NO bad connections in the 400 series area. I replaced ONE
>e-cap 100 @ 35, even though it tested OK.
>I am going to order a new LA7833 vertical IC, but for some reason, I don't
>think it will cure the problem. I see a couple of Tantulam caps in the
area,
>but I think those kind of caps never go bad,..and of course in this case
>they test good.
>Does anyone have any case history of a vertical problem on this set ?
>Also,...does it have a PIP module in it ? ( I don't recognize any.)
>Video looks good anyway, so I wouldn't suspect a PIP problem.
>
>TIA,
>LLW
>
>LeRoy Westlund
>Westlund TV & Electronics
>97 North Main "At least I'll go down
>Centerfield, UT 84622-0087 swingin,......what a swingin
>Ph./Fax 435-528-3822 way to go."
>mailto:LLW@xxxxxxxxxx
>
>
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