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Sony 32FX65E AE5 - LED miga 8 razy przy włączaniu, uszkodzony MX0842 i R6666

Hrkon 06 Sie 2017 02:16 2073 4
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  • #1 16627232
    Hrkon
    Poziom 2  
    Posty: 3
    Sorry for writting in english, but polish is not my native language and i don't understand it.

    Problem is, when turning TV ON, led blinks few times fast, then relay click, after that led blinks 8 times constantly. Im noticing this because I don't know its 2 errors, or just one.

    I have opened the unit, made few measurements, R6666 0.1ohm is open and IC6604 MX0842 is short in almost all legs.
    I have also checked R6614 and R6615, these are fine. Also checked Q6805 and Q6806, which are not in short.
    Read suggestion somewhere in forums to check 135V rail and GND resistance. Its about 850-900ohm.
    Thst's pretty much all what I tested. I will buy MX0842 and 0.1 ohm fusible resistor tomorrow (monday).

    As this is my first CRT TV for servicing, and I'm pretty newb when it comes to CRT television, I'm asking here for help what to look next, before I replace MX0842 and R6666. Can the MX0842 alone be the only reason for this failure? Or there must me something more burned, which caused MX0842 to failure?

    Im not new when it comes to schematics, electronics, soldering just never dig into CRT world. I don't have oscilloscope, just regular multimeter and soldering station.

    Thanks in advance for any suggestion for fixing my first crt tv :)
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  • #2 16627828
    madar
    Poziom 18  
    Posty: 248
    Pomógł: 21
    Ocena: 76
    Check Q6803 and Q6804. If short check/replace FBT.
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  • #3 16628209
    Hrkon
    Poziom 2  
    Posty: 3
    You were correct - both 2SC5480 Q6803 and Q6804 are short on Emiter-Base pins.

    Is there any way I can check flyback transformer with just a multimeter?

    Because new FBT is about 25€ - not worth buying it new, maybe I'll try to find salvage parts TV or give this one as a parts tv.

    Do you think there can also be something wrong, maybe on D1 board, with this simptoms? As service manual says - 2 blink if q6803,q6804, ic6604 are shorted. On my D board, all that components are shorted and i have 8 blink error code.

    Price of r6666, ic6604, q6803 and q6804 are about 15€ new in local electronics store in Zagreb.
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  • #4 18425686
    brahim452
    Poziom 11  
    Posty: 22
    Pomógł: 1
    Ocena: 6
    Sony 32FX65E has achssis AE5
    this problem may caused tye eeprom
  • #5 18431763
    Hrkon
    Poziom 2  
    Posty: 3
    Thanks for answer, but unfortunately TV was since long gone.
    And I think it will be next to impossible to found eeprom dump on internet for it?
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