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boingo
Joined: 01 Mar 2009
Posts: 60
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 Link Posted: Mon Jan 04, 2010 12:48 pm Post subject: Ghosting Image Issue 3 LCD Sanyo - FIXED !!!! |
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Hi
I perhaps made a mistake and went ahead and cleaned my fav old projector a sanyo 3 LCD PLC9000
Well the picture is now free from dust and IS brighter!...however I now have a ghost image..the type of thing you would normally see perhaps when using analogue tv reception.
The convergence is spot on yet there is this second image about 10-15mm to the left of the normal picture.
So far Ive removed all components and reinstalled (the LCD's are located by pegs..so no mistake possible) and yet the ghost image remains on any input.
Anyone with ideas please do post..! Help will be most appreciated.
Thanks in advance
Last edited by boingo on Thu Jan 07, 2010 12:55 pm; edited 1 time in total
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24301
Location: Langley, BC
TV/Projector: All of them!
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| Link Posted: Mon Jan 04, 2010 2:56 pm Post subject: |
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Do the internal menus do it too?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Mon Jan 04, 2010 4:31 pm Post subject: |
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There should be a ghost adjustment in the service menu.......
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boingo
Joined: 01 Mar 2009
Posts: 60
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| Link Posted: Tue Jan 05, 2010 6:40 am Post subject: |
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| Curt Palme wrote: | | Do the internal menus do it too? |
Hi Curt
Yes they do...
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boingo
Joined: 01 Mar 2009
Posts: 60
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| Link Posted: Tue Jan 05, 2010 6:43 am Post subject: |
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| macgyver655 wrote: | | There should be a ghost adjustment in the service menu....... |
Hi macgyver55
Ive heard this mentioned after doing a google...if its this...the service manual is not helpful in telling me which data memory point needs to be adjusted...any ideas which needs changing and to what ?
Thanks
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Tue Jan 05, 2010 5:40 pm Post subject: |
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| boingo wrote: | | macgyver655 wrote: | | There should be a ghost adjustment in the service menu....... |
Hi macgyver55
Ive heard this mentioned after doing a google...if its this...the service manual is not helpful in telling me which data memory point needs to be adjusted...any ideas which needs changing and to what ?
Thanks |
If you want to PM me a link to the service manual you have, I'll take a look at it.
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boingo
Joined: 01 Mar 2009
Posts: 60
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| Link Posted: Tue Jan 05, 2010 11:55 pm Post subject: |
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Macgyver55
Here is the relevant section pages from the service manual
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| Service Mode Access - Sanyo PLC9000 |
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Last edited by boingo on Wed Jan 06, 2010 1:58 am; edited 2 times in total
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 12:34 am Post subject: |
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Thats a pretty lame menu selection. I can show you the Sanyo RPTV service menu with over 200 data selections. There has to be a ghost adjustment section. They are just not revealing it in that manual if thats all the choices you have. Try calling Sanyo.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Link Posted: Wed Jan 06, 2010 1:34 am Post subject: |
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Is there a page missing? There are 4 attachments, but only 3 pages - the first two are the same.
There is a "ghost" control, Mac? Seriously?
SC
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boingo
Joined: 01 Mar 2009
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| Link Posted: Wed Jan 06, 2010 1:57 am Post subject: |
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Sorry guys I duplicated one of the pages...edited out.
Thats all there is in this service manual...I guess Im screwed...my bet is Sanyo would not know much about this old dino.
Some Tech somewhere may remember doing this for a Sanyo PLC9000 once before I wouldnt mind betting.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 2:02 am Post subject: |
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| ecrabb wrote: | Is there a page missing? There are 4 attachments, but only 3 pages - the first two are the same.
There is a "ghost" control, Mac? Seriously?
SC |
Yes, seriously. Ghosting is a common anomaly in LCD projection displays.
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30825 Time(s) |
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 2:05 am Post subject: |
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| boingo wrote: | Sorry guys I duplicated one of the pages...edited out.
Thats all there is in this service manual...I guess Im screwed...my bet is Sanyo would not know much about this old dino.
Some Tech somewhere may remember doing this for a Sanyo PLC9000 once before I wouldnt mind betting. |
It wouldn't be an issue of someone remembering. It would be in their database.
Vintage 1999, not to old yet.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 2:09 am Post subject: |
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Hey, does that service manual have a chassis number for it?
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boingo
Joined: 01 Mar 2009
Posts: 60
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| Link Posted: Wed Jan 06, 2010 2:34 am Post subject: |
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Hi Mac
Not sure about the service manual having a chassis number...it has a File Number C-2448..and also states all the models it covers...did you mean chassis number or something else
Exact model here is a PLC-9000EA
Im just trying Sanyo Support Australia..(where Im at) will see if they have that database for this.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 2:42 am Post subject: |
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Here is the number for Sanyo US commercial technical support. (888) 337-1215
Projectors fall under the commercial section of the company. Then you just have to hope you get someone who wants to help you. Just give them a BS story. Your a repair shop but not an ASC and this one is a big deal and you really need some help. You were told that there is a ghost adjustment but it was not available in the SM but another tech told you he got the adjustment procedure from someone there at Sanyo a few years ago but he couldn't remember what the procedure was. If they cant find the procedure ask them for their commercial repair center and the manager in charge and if they would authorize the conversation for release of the information needed.
You really just need to play games with these sometimes jerks. I make a sport of it. I'll tell them what ever I can think of to get the info I need. After all, whats the big secret.... 
I actually have documents stamped classified or secret..... LOL.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 2:43 am Post subject: |
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| boingo wrote: | Hi Mac
Not sure about the service manual having a chassis number...it has a File Number C-2448..and also states all the models it covers...did you mean chassis number or something else
Exact model here is a PLC-9000EA
Im just trying Sanyo Support Australia..(where Im at) will see if they have that database for this. |
If your trying support there then make sure its Sanyo commercial.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Link Posted: Wed Jan 06, 2010 2:52 am Post subject: |
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| macgyver655 wrote: | | Yes, seriously. Ghosting is a common anomaly in LCD projection displays. |
Weird. I had no idea. What exactly is that controlling? Is it a timing adjustment in the LCD driver circuit or something? What causes "ghosting"?
| macgyver655 wrote: | | I actually have documents stamped classified or secret..... LOL. |
Please. Gee, these people don't take themselves a little too seriously at all, do they?
SC
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 3:15 am Post subject: |
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| ecrabb wrote: | | macgyver655 wrote: | | Yes, seriously. Ghosting is a common anomaly in LCD projection displays. |
Weird. I had no idea. What exactly is that controlling? Is it a timing adjustment in the LCD driver circuit or something? What causes "ghosting"?
| macgyver655 wrote: | | I actually have documents stamped classified or secret..... LOL. |
Please. Gee, these people don't take themselves a little too seriously at all, do they?
SC |
I have not read what the specific cause is but I've read parts where a new polarizer film helps reduce ghosting so I'm assuming its may be a type of reflection. If I get some time I'll check some training stuff and see if it explains ghosting.
Yea, the confidential stuff just makes me laugh but I think it has something to do with not wanting another maker getting their secrets. It probably only matters for a year or 2 after production. After that its just reverse engineering. And by that time they have something else thats confidential.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 3:18 am Post subject: |
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| boingo wrote: | Hi Mac
Not sure about the service manual having a chassis number...it has a File Number C-2448..and also states all the models it covers...did you mean chassis number or something else
Exact model here is a PLC-9000EA
Im just trying Sanyo Support Australia..(where Im at) will see if they have that database for this. |
I found this doing some searching.
quote:
It has a faint double image, apparently in the red channel, and the optical alignment
is correct. The cyan leading ghost image shows up on all screens including OSD
menus. I've seen similar but correctable ghosting problems in other projectors.
Older Sanyo models like the PLC-9000 and other makes such as Boxlight 9600, Eiki
LC-X1 and Proxima 9310 made by Sanyo were "repairable" by getting into the
service menu and changing one data value.
The fault with this Hitachi is that the "ghost" image is exactly 12 pixels
wide and shows up ahead of normal vertical lines. A warped panel or dichroic
filter wouldn't do that. If a red-only screen is displayed and the RGB input is
fed color bars at 50% level (you will not see it at 100%), the right side of the
red vertical bar is dark, the width of 12 pixels. The green and blue channels
are OK.
As I mentioned before, we had quite a few Sanyo based projectors with the
same kind of problem. The "cure" for those was to change the data in one memory
location in the service menu. We needed the ear of a knowledgeable tech at
Sanyo, and I got it several years ago... that problem was solved for Sanyos.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Link Posted: Wed Jan 06, 2010 3:28 am Post subject: |
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| ecrabb wrote: | | macgyver655 wrote: | | Yes, seriously. Ghosting is a common anomaly in LCD projection displays. |
Weird. I had no idea. What exactly is that controlling? Is it a timing adjustment in the LCD driver circuit or something? What causes "ghosting"?
| macgyver655 wrote: | | I actually have documents stamped classified or secret..... LOL. |
Please. Gee, these people don't take themselves a little too seriously at all, do they?
SC |
I did a quick, short read and apparently its has to do with the speed that the pixels are switched on and off in the panel. I'll assume then that the adjustment would alter the speed and based off the page I posted above it may also alter the speed in various locations of the panel. But like I said. I just did a quick read.
This is the part where I said recently that the function of these panels doesn't matter to me that much. My concern is how would I resolve such a problem if I come across it.... 
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