Akai LEA-19V07P, Service Manual

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Basic Trouble Shooting
Problem: Do not power on and no red indicator light.
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Please check the output voltage of AC adaptor, the proper output should be DC12V.
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Please check the fuse on the Main Board if broken.
Problem: Do not power on, red indicator light at stand-by mode.
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Please check whether the power supply has somewhere short circuit to ground or not?
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The EEPROM or Flash memory lose the software, upgrade again please.
Problem: Power on the unit, no display on the screen, but sound is
ok.
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Please check whether the backlight of LCD/LED panel is lighted or not.
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If no backlight, check the connection is reliable? And check whether LED driver board is ok or
not? If not, please replace the LED driver board.
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If the backlight works normal, but no display or no picture on the screen, please check whether
the power supply to the panel (+5V) is right or not? If not, need to check whether the switch
transistor on the Main board is broken or not? Refer to Main Board Trouble Shooting and Circuit
Diagram.
Problem: The remote controller doesn’t work.
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Please check whether the connector from the Main board to Key board is reliable or not? Refer
to Main Board Circuit Diagram.
Problem: No sound.
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Refer to Main Board Trouble Shooting: Audio Trouble.
Problem: Crackly noise
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When turn volume high up it vibrate the casing and make crackly noise, please check and add
more cotton flannels on the cabinet. And please check whether the speaker is damaged. If yes,
please replace a new speaker.
Problem: TV can not search any channels.
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Refer to Main Board Trouble Shooting: Function Trouble.
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