[TechAssist] Re: One more try Samsung PCH521R May need schematic. Convergence problem.
- From: GERALD GANN <alpha21century1234@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 13 Dec 2005 12:58:45 -0800 (PST)
PCH521R is definitely different than the PCJ522R. The convergence and the
audio board are together and stand up on the left side looking from the back. I
can download the PCH521R from ServiceManuals.net but I thought I would check
one more time on the list before I spend the $24.00.
OK Here?s the lowdown. After changing all there STK?s and the 3A fuse in
the P/S as stated in T/A tip. I set up the convergence to perfection and saved.
After doing that I noticed I only had audio coming from one speaker. Being
convergence and audio are on the same board I reached inside from the front to
flex the board, I only assume I did this so I could hear if the other speaker
came on. Anyway whammm it got me. That hurts. I don?t know where the high
voltage came from but it burned a pin hole in my middle finger and a small mark
on my pointer finger when I touched the audio IC heat sink. You can call me
dummy I know I should have used a wooden stick. I could be wrong but my guess
would be it has happened to all of us at some time or another.
Anyway after that I pulled the convergence/audio board and resoldered
the audio circuit audio came back on both sides but convergence was back to the
way it was before I started. Question could the high voltage zap have taken out
the 3 STK?s or do need to go to the power supply? I checked all the fuses on
the power supply board and they are good. I do need the schematic for the
PCH521R
Sorry for the long post but I thought it necessary to tell all to get a
good response. Thanks.
Jerry
Alpha 21 Electronics
Granite City, IL 62040
618-452-8620
alpha21century1234@xxxxxxxxxxxxx
GERALD GANN <alpha21century1234@xxxxxxxxxxxxx> wrote: Thanks Bill that?s why I
ask I have the PCJ522R.
The convergences board is definitely different. As long as the
procedure or the same I can go from there. I did a PCJ522R
awhile back and had to order a special remote to save changes.
Thanks again.
Jerry
Alpha 21 Electronics
Granite City, IL 62040
618-452-8620
alpha21century1234@xxxxxxxxxxxxx
Premium Technologies
wrote: Gerald,
Almost identical, both are the same chassis, and the PCJ522R is on file in the
members
area... If you have any problems getting it I have it and I'd be glad to
download it or
sections of it that you need...
Bill
William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
----- Original Message -----
From: "GERALD GANN"
To:
Sent: Tuesday, December 06, 2005 12:33 PM
Subject: [TechAssist] Re: OK new question. Samsung PCH521R May need schematic.
Convergence
problem.
OK new question. Being I got no replay on my first post. Can
some tell me if the convergence setup is the same for this modal
as it is for the PCJ522R? The schematic would still be great.
Thanks.
Jerry
Alpha 21 Electronics
Granite City, IL 62040
618-452-8620
alpha21century1234@xxxxxxxxxxxxx
GERALD GANN wrote:
Samsung PCH521R May need schematic. Convergence problem.
Found this tip in T/A
Garris TV, Make: Samsung, Model: PCH521R, Chassis
APT51B,
Problem: Convergence way off and unable to adjust, top/bottom bowed-in.,
Cure: Open 3A on P/S Module located on right side of chassis, this fuse
protects the -26v
going to all (3) STK391-020 Convergence IC's which are located on left side of
chassis on
large heat-sink. Replaced 3A fuse on SMPS board and replaced all (3) STK391-020
Convergence
IC's on the Convergence/Sound board.
Comments
Before I change all three STK's, looks like a
pain in the axx's. Anyone have any quick fixes? No leakage from
tubes.
Jerry
Alpha 21 Electronics
Granite City, IL 62040
618-452-8620
alpha21century1234@xxxxxxxxxxxxx
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