Question about Sony FD Trinitron WEGA KV-21CL10 21" TV

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SONY TRINITRON KV-2167MT power not on

Normal 0 19 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} I have a Sony TV model number KV-2167MT Trinitron.
I'm facing problem while switch on from front switch
Standby LED blinking while press any switch Like Volume up down, program up down. but power not on. It is hearing low level zoom sound from power supply.
Thanks for solution!

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  • Juozas Butvilauskas
    Juozas Butvilauskas Nov 28, 2008

    Problem is not resolved. I have replaced Horizontal Output Transistor 2SD1878 in my KV-2167MT but TV is not working. The low level sound ,,cirrr..cirrr..." is the same and Standby LED blinking while press any switch Like Volume up down, program updown. What the ****? Second question-how can i check HOT 2SD1878. It is not simple transistor because there is diode inside connected to collector and emitter. May be i bought bad transistor or there is another problem?

  • Juozas Butvilauskas
    Juozas Butvilauskas Dec 01, 2008

    Thank you for trying help me. I am busy now and I can't use your solution. Next weekend may be I try to test and repair my TV set. Actually an old 2SD1878 was shorted absolutely-allways resistance was 0 between base-emitter, base-collector and emitter-collector. Under your last comment my new transistor is functional.Sorry for mistakes-I am from Lithuania and English is not my native language.

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Please replace Horizontal Output Transistor in KV-2167MT and TV will start function.

Posted on Nov 26, 2008

  • Shahid Electronics
    Shahid Electronics Nov 28, 2008

    You can test 2SD1878 by multimeter set on continuety and you will not get high resistance on base-emitter pins and will get one-way high resistance at collector-emitter pins.
    Possible cause now can be bad fly-back transformer and / or 455KHz oscillator near Jungle IC.

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