Question about Akai PDP4294 42 in. EDTV-Ready Plasma Television

1 Answer

The problem is that when turn on the television

The problem is that when turn on the television everything turns on but the screen does not. It just stays off

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  • Marco M May 11, 2010

    do you noticed if panel turns on? or just picture does not appear?

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The red led lightsbut doesn’t turn to yellow after power on and black display
power on,checkXP801 4 pin standbyis low≦0.5Vvoltage

IF YES...(if no goto *)

checkXP801 pin 11,D6V
XP801 pin 9,VDD
IF yes
check I2Cbus
IF normal
1、check VPC3230、PW1235power circuit
2、check VPC3230、PW1235reset voltage
3、check VPC3230、PW1235peripherally circuit
IF abnormality
check buscircuit and PCBwire

*if no
check N803、N804output voltage
no
1、check PW113power impedance
2、checkN803、N804
yes
check X3 14.318Mcrystal
no
change Y2crystal
yes
check PW113RESET pin voltage
no
checkresetcircuit
yes
check AM29LV800BT toPW113 address、data、control
changeAM29LV800BT orPW113 and wirebetween them





D6V:steady voltage to 5V supply for VPV3230、AD9883 analog power;5V-ST:standby power,to PW113、AM29LV800BT(ROM)、24LC32、MAX202E;VDD(3.3V):VPC3230、MST9885、DS90CF383 power;+32V:RF tuner tuning power;A6V:steady voltage to Av board 5V etc. ;A12V:steady voltage to AV board 8V etc.;12VAMP:sound amplifier TA2024 power

Posted on Apr 23, 2009

  • icysteve38 Apr 23, 2009

    Hmmm... lets try to clarify this a tad,



    if no
    check N803、N804output voltage
    -if above does not checkout then-

    1、check PW113power impedance
    2、checkN803、N804
    -if it checked out OK then-
    check X3 14.318Mcrystal
    -if above does not checkout then-
    change Y2crystal
    -if it checked out OK then-
    check PW113RESET pin voltage
    -if above does not checkout then-
    checkresetcircuit
    -if it checked out OK then-
    check AM29LV800BT toPW113 address、data、control
    changeAM29LV800BT orPW113 and wirebetween them



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