[TechAssist] Re: Mitsubishi mod# CS-2720R Need power supply schematic
- From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 12 Mar 2004 13:27:59 -0500
Jose,
Does the relay have voltage when its in the set? Did you try jumping
the AC side with a light bulb? What I usually do with no print is follow
trace back from coil side, it normally goes the the collector of the relay
drive. Check the base of that transistor and see if it toggles on/off when
you hit the power button. If it does not you could even have a bad/missing
+5V supply... Don't forget the glue that eats the foil bottom side and top
side going across the jumper wires..
Hope this helps
Bob,
Bobs TV Worcester, ma
woodman1@xxxxxxxx
Main 508-853-1482
Fax 508-853-1480
----- Original Message -----
From: <Javiles6@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, March 11, 2004 4:08 PM
Subject: [TechAssist] Mitsubishi mod# CS-2720R Need power supply schematic
> Hello techs
> I have done everything that i can to try and get this set to turn on but
no
> luck. I have remove the relay and apply 12V to it and it kicks. I have
also
> check the degaussing coil out of circuit and is good, so is the turn on
switch.
> My question is this, does this set have a transistor that activates the
relay
> or does it have a turn on transistor? I have check the diode that is
across the
> relay and it checks good. I have also check R591 and is right on the
> money(27K). Any inputs are always appreciated.
>
> Thanks
>
> Jose
>
>
> Aviles Computer & TV Repairs
> 508 Bingaman St
> Reading, PA 19602
> Tel # 610-478-1342
>
>
>
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