[TA-A] Pan AG-1960 and Mitsu VS-5061

 
  The Pan and the Mitsu belong to two different customers. Both units are not 
worth much these days, but some folks like their old gear.
   
  Thanks for the tips.
   
  Mark
   
  MC Mobile
   
  
Telerama <TeleramaTV@xxxxxxxxxxx> wrote:
  Holy crap, buy a new VCR!

Switch mode regulator shorted, and caps bad in supply, check Zeners in 
supply as well.

Mitsu projo: Caps bad on PIP module, remove module jump Y and Chroma lines. 
Sweat pins on Vert output IC.

I am new here,

Isn't this forum limited to technicians?

Is it a gp forum?


----- Original Message ----- 
From: "Dr. Mark" 
To: 
Sent: Tuesday, February 05, 2008 12:49 AM
Subject: [TA-A] Re: RCA will not power up


> Dear Techassist crew,
>
> 1. We were looking for a schematic and possibly a block diagram for the 
> power supply in a Panasonic AG-1960 VCR. The power supply is popping the 
> 2A, 250 V fuse closest to the AC in, and this will occur when the power 
> supply is unplugged from the rest of the unit. There is another fuse in 
> the power supply that remains intact. Does anyone have information on this 
> power supply?
>
> 2. Also, we were looking for schematics and block diagrams for a 
> Misubishi VS-5061 projection TV. The unit has a vertical stability problem 
> until it is warmed up for 30 minutes, then OK. We wanted to investigate a 
> few caps around IC201, IC202, and IC203. Does anyone have schematics and 
> diagrams for this unit?
>
> Any tips are appreciated.
>
> Thanks,
>
> Mark
>
> MC Mobile
> Telerama wrote:
> Terry,
> First, this chassis has no relay "click" when plugged in. The 195 will 
> chirp
> when first plugged in. If you hear that chirp, the supply is running.
>
> There are so many things that can kill a set. It is true that this chassis
> has had bad flybacks. There are two flybacks for the 195. The 239111 
> version
> is the one that failed. We do work for three shops, I have NEVER changed 
> the
> other type (250694), always the 239111 one would fail.
>
> If there is no short on the B+ line, and there is nothing wrong with 
> IC2bus,
> and all standbys are ready, the set will fire, or attempt to fire even 
> with
> a bad flyback. The set will shut down with a bad primary or secondary
> winding in the flyback.
>
> About 30% of the 239111's I have changed had no primary or secondary 
> short.
> There was a breach in the housing of the transformer. In other words it
> would arc, and in most cases short the HOT.
>
> If you are not skilled, it can be very difficult locating a corrupted data
> or clock line on the bus. I have had on several occasions with the 195 and
> 197, surface mount caps that were loading the clock lines.
>
> You need a schematic, DMM, O-scope (in some instances) and of course, some
> level of skill and knowledge.
>
> Tony,
> Telerama Television
>
>
> ----- Original Message ----- 
> From: "Conley, Terry W (Hazard)"
> To:
> Sent: Monday, February 04, 2008 2:39 PM
> Subject: [TA-A] RCA will not power up
>
>
>>I would really appreciate some advice on an RCA Model P52960 rear
>> projection TV. It has chassis PTK195Y06B. This television was donated
>> to my church youth group and it will not power up and I hear no relay
>> clicking if I connect it to A/C power and try to turn it on (also, the
>> buss-type inline fuse is still intact). I assume it is in the primary
>> power supply and would like to have some advice on the most commonly
>> failing parts in that area. I have done some research and feel pretty
>> sure that I will need to change the flyback transformer, but would like
>> to know other common weak points.
>>
>>
>> Thanks,
>>
>> Terry Conley
>>
>> Terry.conley@xxxxxxxxx
>>
>>
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