Service manuals, schematics, eproms for electrical technicians

SONY KV-BT21M90

TV - SERVICE MANUAL
Type: (PDF)
Size
3.0 MB
Page
80
Category
TV
SERVICE MANUAL
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  • Also known:
    SONY KVBT21M90 KVBT 21 90 KV BT21M90 KV-BT21M90
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  • See related repair forum topics below. May be help you to repair.
Warning!
If you are not familiar with electronics, do not attempt to repair!
You could suffer a fatal electrical shock! Instead, contact your nearest service center!

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Relevant TV forum topics:
Sony KDL-37EX402 the TV in dead, no LED, motherboard problem.
Hello

The TV does not show any sign of life , I started the troubleshoot as this , no power Led, no reaction when pressing the power button.

I checked the Power coming out from the power supply, the 3.3V_standby is correct and steady, then I checked the 1.2V_standby produced by IC6001 which Is good as well.

So I decided to control the main IC , IC4000 , he does not output any oscillation on the Xtal, Then I am now bloacked there.

The schematic is downloadable on this  website , the schema is weird because the processor is not represented with any Xtal output, but obviously it has one.

Thanks you for your hint and help.
sony kdl46r470a lcd tv-be keresek táp+main bord panelt
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