[TechAssist] Re: Mits CS2656R Follow up
- From: "James M. Knoble" <jmk1938@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 8 Aug 2003 10:22:10 -0400
The old Mits are loaded with bad caps. Start with the power supply caps.
Here are some tips:
TELEVISION MITSUBISHI CS2656R NO VIDEO MOVE SERVICE SWITCH COMES/GOES
AGC? CLUE CONDUCTIVE ON PCB C773 470UF 5OV BEHIND TUNER
TELEVISION MGA CS2656R INTERMITTANT VIDEO REMOVE C772, REMOVE GLUE
(CONDUCTING) FROM PCB, REPLACE
TELEVISION MITSUBISHI CS2656R INTERMITTENT OR NO TUNER VIDEO CHECK FOR
SHORTED C110 LOCATED AT PIN 10 OF IC201
TELEVISION MITSUBISHI CS2656R AGC OVERLOAD REPLACE OPEN L100.
TELEVISION MITSUBISHI CS2656R PICTURE STRETCHED VERTICALLY AT TOP REPLACE
CAPACITOR C565
TELEVISION MITSUBISHI CS2656R NO AUDIO REPLACE CAPACITOR C335 (NOTE: DC
VOLTAGE AT PIN 34 OF IC201 LOW)
TELEVISION MITSUBISHI CS2656R AFT ADJUSTMENT INOPERATIAVE CHECK C103 MAY
BE LEAKY PIN 37 OF IC201 READS 3V INSTEAD OF 6.5V
On Fri, 8 Aug 2003 10:11:55 -0400, Bob@Bobs tv wrote
> Hello,
> Still working on this dog.. Would anyone have have a print?
> Since last post we found glue, top side of chassis.. Repaired that
> also. and the video goes thru this area..Using sams print that's
> close, but some of the chip # are different from the sams I have..
> Problem is dark grey pix, no trace of color, out of sync and sound
> is ok.. Similar to pip problem but this set does not have one.. Any
> help appreciated.. thanks Bob,
>
> Bobs TV Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main 508-853-1482
> Fax 508-853-1480
> ----- Original Message -----
> From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, August 06, 2003 2:19 PM
> Subject: [TechAssist] Mits CS2656R Help
>
> > When this set was left, customer said set picture would scramble and go
> dead in an hour or 2 days.. We hooked up and set worked fine for
> like 2 hours.. Then, we lost sound and screen went dark... turning
> up screen we found we had no vertical sweep.. We replaced scan diode
> {checked ok} 26v supply thought it feeds vert/audio. We did have B+
> on audio chip and vert output chip when set was not working.. Today
> went to work on this set, has sound, grey screen and scrambled out
> of sync pix.. removing bottom shield found found glue had damaged
> trace near jungle chip, repaired and the same, scrambled pix.
> Probably another supply voltage missing..But without a print its
> very hard to trace and there is no sams listed..Hope someone has
> some ideas..
> > Thanks...
> >
> > Bob,
> >
> > Bobs TV Worcester, ma
> >
> > woodman1@xxxxxxxx
> >
> > Main 508-853-1482
> > Fax 508-853-1480
> >
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--------------------------
James M. Knoble
jmk1938@xxxxxxxxxx
P: 304-366-1938
F: 304-367-8965
--------------------------
KnobleNet Webmail
(http://www.knoble.org)
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