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sony kv-27 trinitron power issue

 
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martin LP
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PostPosted: Sun Jul 30, 2006 5:30 am    Post subject: sony kv-27 trinitron power issue Reply with quote

I have this TV where there is no indication of power on the front panel and the power will not switch on. I have checked the internal fuses and the 120 V AC to inside the chassis. No problems there.

I think there should be some 5 volt supply always available to run the standby circuitry but cannot seem to isolate it on the power supply section of the main board. Unfortunately I am not able to find a schematic.

I do see that the connector from the control card to the main board has a connector where one pin is labeled 5 V standby. The connector from the control card to the front panel also has a 5 V standy pin. There is no voltage on this pin.

Any suggestions? Or does anyone have a service manual/schematic for this or similar TV?

Model KV-2?V55 (can't read the label. probably KV-27V55 since it is a 27 inch TV.

Thank you

Martin Perrine
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daved
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PostPosted: Mon Jul 31, 2006 1:29 am    Post subject: Reply with quote

try here you may have some luck

manuals.electromaniacs.com/

Dave
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Mon Jul 31, 2006 1:41 am    Post subject: Reply with quote

Check/Replace Q601,Q602,R607,C610/.22mf,Q591
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martinlp



Joined: 08 Sep 2006
Posts: 1

PostPosted: Fri Sep 08, 2006 10:06 am    Post subject: power problem for kv27 Reply with quote

Hi Minnie

You mentioned several specific part numbers. Thank you very much I'll look into that. Do you have a schematic for this TV? Or do you know if there is a very similar set that may have a schematic available.

Sorry it took me so long to get back to this.
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Mon Sep 11, 2006 5:09 am    Post subject: Reply with quote

Check R607 and see if it's open. It's a .10ohm resistor/fuse.
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