[TechAssist] Re: One more try Samsung PCH521R May need schematic. Convergence problem.
- From: GERALD GANN <alpha21century1234@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 14 Dec 2005 07:53:38 -0800 (PST)
Thanks Damon for the input. Life is great, a lot better than the
alternatives.
1. All inputs did adjusted fine and saved. I had turned the
TV off and back to make sure.
2. TV doesn?t have Flash focus.
3. I can?t even get the customers convergence to move, same
as before I started working on it. Also can?t get into
convergence setup grids same as before. Thanks again.
Jerry
Damon <DamonEB@xxxxxxxxxxx> wrote: Well Damn Jerry....your life sucks! Doesn't
it.....
Anyways, there's several things to consider. [1] Did Samsung make the
convergence adjustable for EACH input??
(Been there, done that).
[2] Did you SAVE and FORGET to Flash focus (if it has it)? You'll lose your
new settings everytime on Samsung/Sony/Hitachi.....
3] and most important...can you still ADJUST the convergence grids? If so,
you probably wiped the Eeprom's contents.
On 1 2 and 3 you need to adjust the convergence, if it doesn't move at all,
well....I'm sure you've checked that already. Do you need an Eeprom
replace?? I really don't think so, you'll know it if you SAVE one or 2
points, turn off the TV, back on, and those points have gone back to their
first setting....
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "GERALD GANN"
To:
Sent: Tuesday, December 13, 2005 3:58 PM
Subject: [TechAssist] Re: One more try Samsung PCH521R May need schematic.
Convergence problem.
> 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 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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