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robmc
Joined: 31 Aug 2005
Posts: 1
Location: herts
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 Posted: Wed Aug 31, 2005 12:29 pm Post subject: SONY 28" TRINITRON TURNING ON PROBLEM |
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 I HAVE A 4 YEAR OLD SONY 28 INCH TRINITRON TV ( NOT WIDESCREEN) WHEN I TURN IT ON IT GOES INTO STAND BY MODE AND THE LED FLASHES 11 TIMES. IF I PRESS THE STAND BY BUTTON ON REMOTE IT SOUNDS LIKE ITS ABOUT TO COME ON BUT DOESN'T. I WOULD APPRECIATE ANY FEED BACK THANKS FOR YOUR TIME AND HELP
ROB |
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Guest
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| Posted: Thu Sep 01, 2005 1:09 pm Post subject: |
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What is precisely the reference: KV29..... |
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Guest
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| Posted: Thu Sep 01, 2005 1:11 pm Post subject: Re: SONY 28" TRINITRON TURNING ON PROBLEM |
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| robmc wrote: | I HAVE A 4 YEAR OLD SONY 28 INCH TRINITRON TV ( NOT WIDESCREEN) WHEN I TURN IT ON IT GOES INTO STAND BY MODE AND THE LED FLASHES 11 TIMES. IF I PRESS THE STAND BY BUTTON ON REMOTE IT SOUNDS LIKE ITS ABOUT TO COME ON BUT DOESN'T. I WOULD APPRECIATE ANY FEED BACK THANKS FOR YOUR TIME AND HELP
ROB |
I may help you to put a diagnosys,
what is the exact reference: KV28.....? |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Mon Sep 05, 2005 6:52 pm Post subject: |
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| What he's asking is what is the modle #? Kv-28???? |
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Guest
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| Posted: Thu Jul 27, 2006 1:30 am Post subject: |
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I have the exact problem with a KV-32LS35U. Does anyone have any clues?
Tom |
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gary
Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk
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| Posted: Thu Jul 27, 2006 4:32 pm Post subject: |
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| 11 flashes on kv32ls35u means no 8v supply to the jungle ic, can be misleading as a short circuit HOT can cause the same symptoms, if HOT is s/c check for dry joints in line drive circuit and replace transistor with IDENTICAL item NOT an equivalent, if it fails again replace LOPTX. |
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Guest
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| Posted: Sat Aug 05, 2006 9:34 pm Post subject: |
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gary
Thanks for the info but it has been some 15 years since I repaired a tv last. Your terminology is a bit alien to me. Can you translate
Tom |
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gary
Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk
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| Posted: Mon Aug 07, 2006 3:57 pm Post subject: |
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| HOT means horizontal/line output transistor, LOPTX means horizontal/line output transformer, sometimes called flyback transormer. HOT in this set is Q533. |
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Guest
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| Posted: Tue Aug 08, 2006 10:21 am Post subject: |
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Even I have the same problem, but it flashed 4 times. We were watching and it went blank. When I power on I hear it turn on - a click but not like how it used to sound earlier.
Thanks for any ideas ! |
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gary
Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk
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| Posted: Tue Aug 08, 2006 3:58 pm Post subject: |
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| 4 flashes means no vertical sync, if line stage is running correctly check frame output ic501 and its supplies, usually + & - 15v on pins 2 & 4. you will need to test this quickly as line will only run briefly in protection mode. |
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