Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Transistor Portable Televisions

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 09-13-2012, 06:03 PM
etype2's Avatar
etype2 etype2 is offline
VideoKarma Member
 
Join Date: Mar 2010
Location: Valley of the Sun, formerly Silicon Valley, formerly Packer Land.
Posts: 664
Sony KV 5000 Trinitron

Anyone know what these controls stand for and do?

They are at the back of a Sony KV 5000 Trinitron.

R BKG B BKG G BKG

Looks like one can insert a screwdriver to adjust, just curious as to what they do.
__________________
Personal website dedicated to Vintage Television https://visions4netjournal.com
Reply With Quote
  #2  
Old 09-13-2012, 06:29 PM
crtfool's Avatar
crtfool crtfool is offline
VideoKarma Member
 
Join Date: Sep 2007
Posts: 198
Red Background
Blue Background
Green Background

They control the intensity of the 3 guns, as well as the RGB Drive controls - which are adjusted internally.
Reply With Quote
  #3  
Old 09-13-2012, 07:25 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,934
They are good for keeping a B&W image from being tinted, and the colors more true on a color show.
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
  #4  
Old 09-13-2012, 08:21 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,590
I suspect that the more fragile low power directly heated cathode structure employed in the CRT for this set may have been more prone to minor spacing changes... nice to have these three controls, as well as the "screen" adjustment readily available for minor "touch-up".

jr
Reply With Quote
  #5  
Old 09-14-2012, 09:01 PM
etype2's Avatar
etype2 etype2 is offline
VideoKarma Member
 
Join Date: Mar 2010
Location: Valley of the Sun, formerly Silicon Valley, formerly Packer Land.
Posts: 664
Thanks. My set has to "warm" of a color image. Would like to adjust without opening the set. Know very little about internals. Do you think if I adjust the B BKG, I could "cool" the image? Or a combination of the three?

Is the Screen adjustment used to adjust the size or position?
__________________
Personal website dedicated to Vintage Television https://visions4netjournal.com
Reply With Quote
Audiokarma
  #6  
Old 09-14-2012, 11:04 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,590
I don't have the calibration procedure, but I would try either turning the red down a bit or the blue and green both up a bit to see if you can obtain a more balanced picture. The "screen" control affects the overall brightness of all three guns.

jr
Reply With Quote
  #7  
Old 09-15-2012, 01:22 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,934
I'd, with a B&W picture, turn the blue down to min then balance the remaining two controls for true yellow then crank the blue back up until a true white is obtained. I use this procedure on tube type equip so YMMV.

If the B&W image is already tinted badly then what do you have to loose?
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
  #8  
Old 09-17-2012, 05:58 PM
etype2's Avatar
etype2 etype2 is offline
VideoKarma Member
 
Join Date: Mar 2010
Location: Valley of the Sun, formerly Silicon Valley, formerly Packer Land.
Posts: 664
I set up a mirror in front of the screen and watched the effect as I turned counter clockwise the R BKG slightly and then the B BKG clockwise. On a Black and white movie, looks better now, more grey less sepia.

Have ME TV, RTV and THIS over the air channels for old movies and shows like Bonanza, Mary Tyler Moore, Bob Newhart ...
__________________
Personal website dedicated to Vintage Television https://visions4netjournal.com
Reply With Quote
  #9  
Old 09-18-2012, 11:56 AM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 5,753
Quote:
Originally Posted by etype2 View Post
I set up a mirror in front of the screen and watched the effect as I turned counter clockwise the R BKG slightly and then the B BKG clockwise. On a Black and white movie, looks better now, more grey less sepia.

Have ME TV, RTV and THIS over the air channels for old movies and shows like Bonanza, Mary Tyler Moore, Bob Newhart ...
Magnavox used to boast about their sepia switch.
They said it adds a pleasing sepia tone to old movies.
Reply With Quote
  #10  
Old 10-18-2017, 10:12 PM
Popester's Avatar
Popester Popester is offline
VideoKarma Member
 
Join Date: May 2012
Location: Lakewood, CO
Posts: 40
Etype2, I have the manual and could take pictures of grey scale adjustments PM me if you want pics. Popester.
__________________
Sony Trinitron is my favorite brand.
My wish list:
Sony KV-1210U
Sony KV-5000
Sony 8-303W
Reply With Quote
Audiokarma
  #11  
Old 10-18-2017, 10:15 PM
Popester's Avatar
Popester Popester is offline
VideoKarma Member
 
Join Date: May 2012
Location: Lakewood, CO
Posts: 40
Etype2, sorry I misread the title. I thought it was a KV4000. That is the manual that I have. Not the one for KV5000. I would think grey scale adjustment would be similar.
__________________
Sony Trinitron is my favorite brand.
My wish list:
Sony KV-1210U
Sony KV-5000
Sony 8-303W
Reply With Quote
  #12  
Old 10-20-2017, 01:29 AM
etype2's Avatar
etype2 etype2 is offline
VideoKarma Member
 
Join Date: Mar 2010
Location: Valley of the Sun, formerly Silicon Valley, formerly Packer Land.
Posts: 664
Quote:
Originally Posted by Popester View Post
Etype2, sorry I misread the title. I thought it was a KV4000. That is the manual that I have. Not the one for KV5000. I would think grey scale adjustment would be similar.
Popester,

If you have the KV 4000 manual, would appreciate a copy. I have a KV 4000.
__________________
Personal website dedicated to Vintage Television https://visions4netjournal.com
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 06:05 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.