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
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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.
Universal Remote Control Set-up Codes to Akai TVs
1134 1052 1204 1201 1157 1203 1132 1075 1061 1003 1210 1231 1019 1054 1051 1203 1077 1014 1314 1007 1172 1031 1072 1274 1160 1285 1162 1035 1349 1433 1243 1012 1140 1190 1144 1091 1141 1288 1184 1109 1351 1311 1341 1342 1211