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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Sony pincoushin woes

 
 


Durriel
New User

Feb 18, 2008, 10:16 PM

Post #1 of 6 (1079 views)
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Sony pincoushin woes Can't Post
Ive been poking around all over forums and the internet looking for a solution to this but no dice yet.

i have a circa 1991 sony trinitron tv (model #: kv-27exr20). ive picked up on the fact that there is a loose pincoushin joint somewhere causing th picture to bow, the problem is i cant seem to find anywhere on the net which board the pincoushin joint would be on.

i want to fix this but i dont want to kill myself because of the high voltage.

i can solder im into all things electronic, im a computer guy though not a tv guy.

my only thought is its probably the board attached to the crt, is that correct?

any help is appreciated :D



Franky
User

Feb 19, 2008, 12:08 AM

Post #2 of 6 (1064 views)
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Re: [Durriel] Sony pincoushin woes [In reply to] Can't Post
C506 maybe opened across Q502 H.O.T.


Paulpablo
Enthusiast

Feb 19, 2008, 1:42 AM

Post #3 of 6 (1060 views)
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Re: [Durriel] Sony pincoushin woes [In reply to] Can't Post
Probably going to be C512 (4.7 mfd@35V) and bad solder joints on Q530 (2SD1761F).


Durriel
New User

Feb 20, 2008, 1:19 AM

Post #4 of 6 (1052 views)
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Re: [Durriel] Sony pincoushin woes [In reply to] Can't Post
thanks! im going to give it a look this weekend :D


terminator4
User


Feb 20, 2008, 9:23 PM

Post #5 of 6 (1043 views)
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Re: [Durriel] Sony pincoushin woes [In reply to] Can't Post
the soldering joint isnt the only thing! it could be a blown risistor and capacitor like in my 1990 GE tv, it also was bowing and i took it apart to find it a capacitor and two risistors were blown cause metal was shaving off of the risistors and plus there was a black mark on the electronic board


rrobor
Veteran

Feb 23, 2008, 10:42 AM

Post #6 of 6 (1023 views)
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Re: [Durriel] Sony pincoushin woes [In reply to] Can't Post
There is no pin correction on the tube base. Voltage and signal is derived from the Horizontal output through a modulator coil and diodes and a transistor and fed into the scan circuit. Pin correction creates 1/10th of the horizontal scan it has nothing to do with video information

 
 
 


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