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 10-29-2015, 08:38 PM
goat1981 goat1981 is offline
VideoKarma Member
 
Join Date: Sep 2015
Posts: 25
Sony 5-307UW vertical stretch / fold over issue - Please help! :(

Hello, everyone,

About while back, I found a Sony 5-307 for 10 bucks in really nice physical condition. However, I quickly found out it didn't work... I recapped the sweep board, and now I have clear sound and a 'picture.' However, the picture is way too tall -- stretched to the point you can easily see the scanning lines and also folded over.

Please see attached pictures.

It was obvious someone else worked on the set before I got it, as there were a couple of replaced components (possibly incorrect values...) and an *added* capacitor from ground to the one of the terminals of the vertical coil on the yoke. Removing this seemed to make the issue better, but not correct. I guess he/she was trying to fix the same problem at one point, but it looked like guesswork. It also seems there may be a missing component from the sweep board, as I see two holes in the sweep board where it seems there should be something (see final photo)

I can't seem to find a service manual or schematic, so I'm flying blind. Any of you guys that work on these sets have any advice?

Thanks in advance for your help.
Attached Images
File Type: jpg IMG_1293.jpg (58.3 KB, 39 views)
File Type: jpg IMG_1294.jpg (58.5 KB, 27 views)
File Type: jpg IMG_1295.jpg (75.9 KB, 18 views)
File Type: jpg IMG_1296.jpg (47.5 KB, 34 views)
File Type: jpg IMG_1297.jpg (76.2 KB, 22 views)
Reply With Quote
  #2  
Old 10-30-2015, 12:56 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,841
IIRC I have the Sam's. If I have time I'll post the vertical section later.
__________________
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
  #3  
Old 10-30-2015, 08:15 AM
goat1981 goat1981 is offline
VideoKarma Member
 
Join Date: Sep 2015
Posts: 25
Awesome!!

Thank you.

Quote:
Originally Posted by Electronic M View Post
IIRC I have the Sam's. If I have time I'll post the vertical section later.
Reply With Quote
  #4  
Old 10-30-2015, 08:50 AM
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 2,771
If its got fresh solder assume its bad, wrong value, backwards,
touching something or maybe a solder splash. Also watch the
controls, they break real easy.

When we got sets in that had been worked on, usually shotgunned
nobody wanted to deal with them. You rarely could get a
honest story from the customer either. You didnt want to
bad mouth another shop either. We had excelent relations & wanted
to keep it that way.

73 Zeno
Reply With Quote
  #5  
Old 10-31-2015, 01:04 PM
goat1981 goat1981 is offline
VideoKarma Member
 
Join Date: Sep 2015
Posts: 25
Thanks for your reply. It doesn't look like a whole lot has been done, but from what you say, it looks like it's going to be impossible to fix without the service manual. Does anyone have a copy of one on here by any chance?

All controls seem fine, even internal ones, as they all do what they are intended to do.



Quote:
Originally Posted by zeno View Post
If its got fresh solder assume its bad, wrong value, backwards,
touching something or maybe a solder splash. Also watch the
controls, they break real easy.

When we got sets in that had been worked on, usually shotgunned
nobody wanted to deal with them. You rarely could get a
honest story from the customer either. You didnt want to
bad mouth another shop either. We had excelent relations & wanted
to keep it that way.

73 Zeno
Reply With Quote
Audiokarma
  #6  
Old 11-02-2015, 11:20 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,841
My sam's is for a 5-303W, but may be similar enough to be helpful.

__________________
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
  #7  
Old 11-05-2015, 07:53 PM
Arcanine's Avatar
Arcanine Arcanine is offline
VideoKarma Member
 
Join Date: Jan 2015
Location: Lake Geneva, Wisconsin
Posts: 281
They're a lot different. I have the schematic for his. I can take some pics of mine later. Sony made quite a lot of changes between the sets.
Reply With Quote
  #8  
Old 11-06-2015, 12:41 AM
goat1981 goat1981 is offline
VideoKarma Member
 
Join Date: Sep 2015
Posts: 25
Hello, guys,

You are very kind to post schematics and parts placement on here for me. I'm sorry I haven't checked back on this thread to tell you that I bought the SAMS manual from their website for this TV. Sorry that you spent time scanning things for me... This week was crazy busy and I didn't have time to check my thread.

I found a few misplaced parts tonight (a 10uF capacitor where a 30uF should be) and also a resistor someone added to the sweep board.

Changing these corrected the problem, and there is now a watchable picture. However, it is shifted to the left quite a bit. I'll post some pictures later when I have time. I can mess with the horizontal hold to shift the picture right and get rid of the blank space, but then the picture becomes distorted and is on the brink of losing sync.

It's a lot closer to being fixed, though! Thanks for all your help.
Reply With Quote
  #9  
Old 11-06-2015, 01:37 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,841
There are probably centering rings on the CRT neck, try those.
__________________
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
  #10  
Old 11-07-2015, 07:27 PM
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 2,771
Next step is to replace the 'lytics in the hoz phase, osc & drive.
Do a few at a time & test. 99% of the problems were
dirty controls, tuner, & bad lytics even 40 yrs ago when
they wernt so old. That goes for all early SS sets be it Jap or US.

73 Zeno
Reply With Quote
Audiokarma
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 10:53 AM.



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