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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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 Posted: Tue Mar 24, 2009 8:39 pm Post subject: Sony KV32S40 no video just audio |
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Hi, my Trinitron made in June 1999 with a chassis number AA-2D shut down the picture this morning. The sound was still on and I also noticed the red stand-by light was blinking.
I shut the TV off and then turned it back on again. The picture came back but only for a minute or two...
I have removed the back to clean the dust. I also spent some time looking at solder joints for obvious signs of failure, but no luck. I don't know exactly where to look anyway...
I will be making my own tool to dis-charge the CRT while awaiting your response.
Thanks in advance! |
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Google
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 Post subject: Advertisement |
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JTS1957
Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away
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| Posted: Tue Mar 24, 2009 11:08 pm Post subject: |
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| How Many Blinks? |
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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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| Posted: Wed Mar 25, 2009 10:15 am Post subject: |
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| I did not count them... didn't know they would provide a diagnostic code. I'll have to plug it back in when I get home tonight. Report back later... |
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curt wolfe
Joined: 24 Feb 2009
Posts: 51
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| Posted: Wed Mar 25, 2009 4:58 pm Post subject: |
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| 4 blinks is vertical, if so could be poor solder connections or need ic # tda8172. |
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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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| Posted: Wed Mar 25, 2009 7:13 pm Post subject: |
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| Both the wife and my son said it would blink continuosly until the power was shut off. Is that helpful or should I hook it up and try again, just to verify? |
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Google
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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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| Posted: Thu Mar 26, 2009 10:28 pm Post subject: |
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| TV worked fine all day... I will report back if symptoms come back and I get a diagnostic code. |
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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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| Posted: Fri Mar 27, 2009 8:36 pm Post subject: |
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Well wouldn't ya know I put the set back in the entertainment center and after 5 minutes the picture went out again... must be a little hotter environment than just sitting on the floor.
Any way, the red light blinked continuosly. The diagnostic code chart indicates No reply from the jungle IC301 data bus is busy, shorted to ground, or held high. IK Video path is defective.
I consider myself an above average auto mechanic but could use some help translating this new language. :wink: |
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kuhurdler
Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS
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| Posted: Fri Mar 27, 2009 10:51 pm Post subject: |
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I wanted to take a step back here.
While I am not completely sure it applies to your particular model... Typically when I see this symptom in a Sony, it is due to a failing CRT, and the IK circuit blanks the video signal when it determines the CRT is bad. |
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JTS1957
Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away
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| Posted: Fri Mar 27, 2009 11:53 pm Post subject: |
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You could try SLOWLY lowering and raising the Screen (G2) control on the Flyback transformer. If the picture comes on, even for a moment, the CRT is likely involved.
If CRT is involved you would need to test/rejuve with something like:
http://www.mcmelectronics.com/product/SENCORE-CR7000R-/722-110
As far as technical terms - I'm sure you've used search engines? Both "In Forum" and "Google," etc. |
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jleuck64
Joined: 24 Mar 2009
Posts: 6
Location: Oregon
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| Posted: Sat Mar 28, 2009 10:01 am Post subject: |
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| So let me see if I understand youse guys... I got my 10 years out of a $400-$500 set and it's probably time to go pick out another one eh? |
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