Service manuals, schematics, eproms for electrical technicians

SONY KV20,21,25FV10 CHASSIS BA4C

TV - SERVICE MANUAL
Type: (PDF)
Size
24.0 MB
Page
53
Category
TV
SERVICE MANUAL
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  • Also known:
    SONY KV-20 BA-4C KV20 21 25FV10 CHASSIS BA4C KV 20 25 FV 10 BA
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  • See related repair forum topics below. May be help you to repair.
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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 KV-27XS TD gerjed, búg a hang néha
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Sziasztok! Ment ez a dög,és fújkodtam kalte sprével,és egyszer csak megállt a tápja minden..Az a helyzet áll fönn,hogy a táp bufferkondin,nincs semmi feszkó,azaz a 2 db relé a tápban be se húz,mivel hogy nem kapják meg a 12 voltot a relék...Hol kéne kapisgálnom a relék behuzása végett?? Üdv:Sparco
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