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sony KV-29K5U
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Toon



Joined: 20 Sep 2006
Posts: 7

PostPosted: Wed Sep 20, 2006 12:33 am    Post subject: sony KV-29K5U Reply with quote

Can anyone help me - my Sony KV-29K5U Television has just stopped no picture and no sound, the red LED just keeps flashes twice with a pause.
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Wed Sep 20, 2006 5:53 pm    Post subject: Reply with quote

CHECK Q533 FOR S/C, REPLACE ONLY WITH IDENTICAL, DO NOT USE EQUIVALENT IT WON'T LAST, CHECK FOR DRY JOINTS ON LINE DRIVE TX AND IN BASE CIRCUIT OF Q533, IF FAULT PERSISTS REPLACE LINE OUTPUT TRANSFORMER.
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Toon



Joined: 20 Sep 2006
Posts: 7

PostPosted: Wed Sep 20, 2006 11:46 pm    Post subject: Reply with quote

Gary can you be a bit more explicit "Q533 FOR S/C" I'm a bit green when it comes to TV's also where do you get the schematic drawings from?
Thanx
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Thu Sep 21, 2006 12:22 am    Post subject: Reply with quote

q533 is a transistor mounted on a heatsink at the back of the set, remove it from the circuit board and measure its resistance between the middle pin and the 2 outer ones, if there is little or no resistance then the transistor is short circuit (s/c), schematic is available on this site , search for kv25k5 it is the same chassis.
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Toon



Joined: 20 Sep 2006
Posts: 7

PostPosted: Thu Sep 21, 2006 1:40 am    Post subject: Toon Reply with quote

Thanks Gary i'll have a go.
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Toon



Joined: 20 Sep 2006
Posts: 7

PostPosted: Sat Sep 23, 2006 2:16 am    Post subject: Reply with quote

Gary I've taken the transistor of and tested it - it is shorted across all pins, do you know where I could get a replacement.
Thanx again
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Mon Sep 25, 2006 3:59 pm    Post subject: Reply with quote

try semenedis 08708508501 or cpc 08701202530
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Toon



Joined: 20 Sep 2006
Posts: 7

PostPosted: Wed Sep 27, 2006 12:16 am    Post subject: Reply with quote

Gary I have changed the Transistor and now I have sound but no picture, the red LED flashes 4 times.
Any suggestion what to do next?
Thanks.
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Wed Sep 27, 2006 4:13 pm    Post subject: Reply with quote

4 flashes is no vertical sync, check ic501 and related parts, it may also be worth resoldering the rivets on the scan coil windings as they can cause problems
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PostPosted: Thu Sep 28, 2006 3:18 am    Post subject: Reply with quote

Gary I have checked around IC501 and it seams ok. Can you tell me where the Scan coil windings are so that I can re-solder the rivets?
Thanks
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