Question about Akai PDP4294 42 in. EDTV-Ready Plasma Television
The problem is that when turn on the television everything turns on but the screen does not. It just stays off
The red led lights，but 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
1、check VPC3230、PW1235power circuit
2、check VPC3230、PW1235reset voltage
3、check VPC3230、PW1235peripherally circuit
check buscircuit and PCBwire
check N803、N804output voltage
1、check PW113power impedance
check X3 14.318Mcrystal
check PW113RESET pin voltage
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
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Posted on Jan 02, 2017
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