AKAI PDP 5006M - MODULES AND FUNCTIONS - FAILURE SYMPTOMS & SCREEN-SHOTS - Universal Remote Control Set-up Codes
There are 1 pc. panel and 12pc.s PCB including 2 Pac’s Y/Z
Sustainer board, 2 Pac’s Y Drive board, 6pc.s X Extension boards, 1 pc. Control
(Signal Input) and 1 pc. Power board in
the Module.
SET
There are 6pc.s PCBs including 1 pc. AUX. PSU Board, 1 pc.
Keypad board, 1 pc. Remote Control
Receiver board, 1 pc. L/R Speakers and
1 pc. Main (Video) board in the SET.
PCB FUNCTION
Power:
- Input voltage: AC 110V~240V, 47Hz~63Hz. Input range: AC 90V(Min)~265V(Max) auto regulation.
- To provide power for PCBs.
- Main (Video Interface) board: To converter TV signals, S signals, AV signals, Y Pb/Cb Pr/Cr signals, DVI signals and D-SUB signals to digital ones and to transmit to Control board.
- Control board: Dealing with the digital signal for output to panel.
- Receiving the signals from Control and high voltage supply.
- Output scanning waveform for Module.
- Y-Drive board: Receive signal from Y sustainer, output horizontal scanning waveform to the panel.
- X extension board (6pcs): Output addressing signals.
- Tuner/Audio Board: Process and Amplifying the audio signal to speakers and convert TV RF signal to video/audio signal and send to Main board.
PCB FAILURES
Cause
CONTROL:
- Abnormal noise on screen.
- No picture.
- Lacking color, Bad color scale.
- No voice.
- No picture but with signals output, OSD and back light.
- Abnormal noise on screen.
- No picture, no power output.
- No picture.
- Color not enough.
- Flash on screen.
- Darker picture with signals.
X-Extension :
- Abnormal vertical noise on screen.
Audio Board or AUX PSU:
- No voice. (Make sure Mute/OFF)
- Noise.
Defect: Address (vertical stripe) Open.
- A line or block does not light up in address electrode direction. (1 line ,block open).
Manufacturing : Panel electrode single line/foreign
material./electrostatic/TCP defect
Parts : TCP, Board connection defect
Operation : Assembly error/ Film damage.
Defect: Address (vertical stripe) Short. Another color simultaneously appears because adjacent data
recognizes the single pattern signal.
Cause: Manufacturing : Panel electrode short / Foreign material conductive
foreign object inside TCP
Defect: Address output error. A defect other than address open and short Data
printout signal error occurring at certain Gradation or pattern.
Defect: Sustain (horizontal stripe) Open. One or more line do not light up in Sustain
direction.
Cause: Manufacturing: Panel bus electrode single line FPC pressure
defect.
Parts : FPC/board/connection disconnection
Operation : assembly error.
Cause: Manufacturing: Panel electrode short/Foreign material.
Parts: Board/ connector/pin error
Operation: connector / assembling error.
Defect: Dielectric material layer damage.
Symptom: Burn caused by the damage of address bus dielectric
layer appears in the panel discharge/non discharge area. Sustain also
open/short occurs by the damage of address sustain printout.
Cause: layer uneven / abnormal voltage/ foreign material repair
failed.
Defect: F/White low discharge.
Symptom: Low discharge caused by unstable cells occurring at
full white pattern if high (60 degree) or normal temperature.
Cause:
Panel : MgO source /
dielectric thickness cell pitch/phosphor
Circuit : drive waveform/ voltage condition.
Defect: panel damage.
Symptom: Panel crack or break. No image appears in some cause
depending on the damaged parts and damage level.
Cause
Manufacturing: Flatness/palette pin interruption
Operation: overload of panel corner / careless handling
Panel: Flatness / assembly error.
Defect: Exhaust pipe damage.
Symptom: Crack in break if exhaust pipe an image is
partially lacking or the panel noise occurs depending on the damaged parts and
with the passage of time.
Cause: Careless panel handling.
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