[TechAssist] Re: Mitsubishi VS-5003R Power supply schem. needed
- From: "Tony S" <tcselectronics@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 9 Jun 2005 08:11:08 -0500
We usually change both 47uf 100v caps , both 47uf 50v caps and the 10uf 100v
cap in the primary side of both SMPS transformers. also replace R903 270K
that sometimes opens and the 1k resistor Damon spoke of ,then solder the
heck out of the board. Be careful not to crack any traces from the
components as the traces are very fragile and a mere bump of a component on
the front of the board can cause hours of troubleshooting.
Tony Saracco
TCS ELECTRONICS
406 Andra Ct.
Gilberts, IL 60136
tcselectronics@xxxxxxxxx
----- Original Message -----
From: "Damon" <DamonEB@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 09, 2005 2:07 AM
Subject: [TechAssist] Re: Mitsubishi VS-5003R Power supply schem. needed
> That's that 1/8 Watt mini-resistor that always gets cooked isn't it?
> I'm pretty sure that's supposed to be 1000 ohms.
> There's a C914 on the 130V supply that should be replaced/remounted on the
> bottom of the board to stop heat stress on that component....the one
> closest
> to the outside edge....might be C918.
> Most failures occur on the 130V supply, not the other.
>
> If you test it out of the PTV and jumper the relay pins located near the
> relay, don't freak if you hear a click-click-click occur along with a
> skuh-weeeeeeee......you could spend hours thinking you have a problem when
> actually you don't.
> You'll be able to read a Rock Solid 130V supply, and the other SMPS
> section
> (doesn't normally fail) will read twice as much on it's outputs when
> unloaded.
>
> Worked on a hell of a lot of these....
>
> Damon B
> Telrad Electronics
> Fort Wayne IN
> ----- Original Message -----
> From: "Dave Huston" <HustonTV@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, June 08, 2005 4:11 PM
> Subject: [TechAssist] Mitsubishi VS-5003R Power supply schem. needed
>
>
>> Hoping someone has some power supply info on this old proj. Need value of
>> R918 for starters.
>>
>> Dave Huston
>> Huston TV & Electronics
>> 2846 Marion-Cardington Rd.E.
>> Marion,Oh 43302-8919
>> Phone/Fax: 740-389-5726
>> email: HustonTV@xxxxxxxxxxxxxx
>>
>>
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