[TechAssist] Re: FIXED One more try Samsung PCH521R May need schematic. Convergence problem.
- From: GERALD GANN <alpha21century1234@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 22 Dec 2005 14:06:29 -0800 (PST)
While waiting the new STK?s I unplugged and pulled the convergence/audio
board and soldered the audio circuit even though it looked good. I had also
unplugged and pulled the power supply board and inspected it.
When the new STK?s came in I decided I would plug everything back in one
more time before I started changing ICs. Convergences were back to normal I
could adjust the customer?s crosshatch and tech adjustments and save. The audio
was still intermittent in and out. I could flex the board and it would come
back in. I unplugged and pulled the board again and soldered, soldered, and
soldered. Put the board back in audio was good on both sides but the
convergence was out again, no control. Enough to drive you crazy.
I got to thinking, which is not easy for this old man, about having the
board unplugged for a long time while waiting for the new ICs. When I had
plugged them all back in it came back to normal. So I unplugged them all and
let set for an hour or so. I plugged them back in and it came back to normal. I
don?t know why soldering on the board would cause this.
Only thing I can figure is, by unplugging everything let the caps drain
down then when I plugged it back in it reinitialized the EPROM.
Am I crazy or could that be it. It has been playing for five days now off
and on. Looks and stays good. Thanks for the help and setup procedure.
Jerry
Alpha 21 Electronics
Granite City, IL 62040
618-452-8620
alpha21century1234@xxxxxxxxxxxxx
Damon <DamonEB@xxxxxxxxxxx> wrote: Are you saying in #3 that the er, uh
....Mute (1) (#) (*) will not bring up
the conv grid anymore? Don't want the code available to the public, so you
know what I mean, right?
If the grid don't come up, it is possible that the DCU got a hit of HV...but
I think I'd verify b+ to the conv ic, and since the conv board is separate,
you can check the incoming Conv signal is present on the connector at the
Conv output board.....that is a + on this unit.
I don't know if I can ship schematics, but if you need them, I'll give it a
shot...the schematics can be 10 to 20 meg, and my mailbox seems to cut a 20
meg short by 1 or 2 meg...won't ship it if it's over that amount.
So we'd have to find a place to transfer that PDF file....as a whole....
The good thing is Samsung breaks down their manuals into 5 meg sections, or
less.....I'd have to mail a piece at a time and send the next one after you
recieved the first one possibly
I might try to send directly to you after I finish this.....
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "GERALD GANN"
To:
Sent: Wednesday, December 14, 2005 10:53 AM
Subject: [TechAssist] Re: One more try Samsung PCH521R May need schematic.
Convergence problem.
> 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 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
> >
> >
> >
> >
> >
>
> --------------------------------------------------------------------------
> ---
> > This Email List is accessible to the general public through search
> engines. Remove:
> > http://www.tech-assist.org/remove.htm
> > Set Vacation
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.1.371 / Virus Database: 267.13.12/192 - Release Date:
12/5/2005
> >
> >
>
> --------------------------------------------------------------------------
> ---
> > This Email List is accessible to the general public through search
> engines. Remove: http://www.tech-assist.org/remove.htm
> > Set Vacation
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
> >
> >
> >
>
> --------------------------------------------------------------------------
> ---
> > This Email List is accessible to the general public through search
> engines. Remove: http://www.tech-assist.org/remove.htm
> > Set Vacation
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
> >
> >
> >
>
> --------------------------------------------------------------------------
> ---
> > This Email List is accessible to the general public through search
> engines. Remove: http://www.tech-assist.org/remove.htm
> > Set Vacation
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
>
>
> --------------------------------------------------------------------------
---
> This Email List is accessible to the general public through search
engines. Remove: http://www.tech-assist.org/remove.htm
> Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Email Archives: //www.freelists.org/archives/techassist/
>
>
>
>
> --------------------------------------------------------------------------
---
> This Email List is accessible to the general public through search
engines. Remove: http://www.tech-assist.org/remove.htm
> Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Email Archives: //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
- » [TechAssist] Re: FIXED One more try Samsung PCH521R May need schematic. Convergence problem.
