[TechAssist] Re: Curtis Mathes CM27001S. Vertical repeat failure "IC301" LA7845.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 28 Aug 2004 00:16:55 -0600
David,
I have a 32" Sanyo TV in here right now, that uses a LA7841. I was told that
I could replace it with a LA7845. (I wonder if this is true). The only one I
had in stock, was a used LA7845 in an SK series bag.
Not sure if it was an SK or not,....but, when I installed it,....It took my
vertical supply resistor out with in seconds. Maybe there are a batch of bad
ones on the market.
I know better then to use SK series replacements for Vert. ICs, Reg. ICs,
and H.O.T.s.
I am going to try a Generic part, from one of my reliable distributers, as
soon as I build up enough to make an order worthwhile. I MIGHT try an NTE
replacement, in the meantime.
Just a thought.
LLW
LeRoy Westlund
Westlund TV & Electronics
97 North Main "Where there's a will,...
Centerfield, UT 84622-0087 There's always a way."
Ph./Fax 435-528-3822
mailto:LLW@xxxxxxxxxx
-----Original Message-----
From: Robinson Electronics <RobinsonElectronics@xxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Friday, August 27, 2004 5:47 PM
Subject: [TechAssist] Curtis Mathes CM27001S. Vertical repeat failure
"IC301" LA7845.
>Can someone help me diagnos this vertical problem?
>The set will work great for about 10 min, (IC301 heat sink) gets hot and
>looses vert. deflection (to a line).
>I ordered and replaced the ic301 LA7845
>D303 -- 0402-000546 TRV10G
>DZ301 -- 0403-001328 MTZJ22A*
>DZ302 -- 0403-001329 MTZJ24B
>DZ303 -- 0403-001221 UZ39BSB
>DZ305 -- 0403-001328 MTZJ22A*
>C305 -- 2305-000285
>
>Still after about 10 min (gets too hot).
>Can anyone help? Thanks.
>
>Robinson Electronics
>1075 Sweeten Creek Road
>Asheville, NC 28803
>Ph./Fax. 828 274-3787
>Toll Free. 1-888 ROBELECT
>www.robinsonelectronics.com
>www.robelect.com
>Mailto: RobinsonElectronics@xxxxxxxxxxx
>
>----- Original Message -----
>From: "Robinson Electronics" <RobinsonElectronics@xxxxxxxxxxx>
>To: "Tech Assist Group" <techassist@xxxxxxxxxxxxx>; "TechAssist"
><repair@xxxxxxxxxxxxxxx>
>Sent: Monday, August 02, 2004 2:53 PM
>Subject: Curtis Mathes CM27001S. Vertical repeat failure "IC301" LA7845.
>
>
>>
>>
>> > Can some of you Curtis Mathes Techs. help me with this set?
>> > Can't find any tips on this model, not sure of the chassis.
>> > Unit comes on good for about an hour, then loss of vertical deflection.
>> > Has a LA7845 in it.
>> > Found a blown, burnt hole in it, replaced it, then after a while same
>> thing.
>> > Replaced 3 capacitors around it, checked ok though.
>> > Let it play for a bit, but the heat-sink gets hot.
>> > Can anyone help with this? Thanks. David.
>> >
>> > Robinson Electronics
>> > 1075 Sweeten Creek Road
>> > Asheville, NC 28803
>> > Ph./Fax. 828 274-3787
>> > Toll Free. 1-888 ROBELECT
>> > www.robinsonelectronics.com
>> > www.robelect.com
>> > Mailto: RobinsonElectronics@xxxxxxxxxxx
>> >
>>
>
>
>
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