Read Sharp BD-HP22H (serv.man4) Service Manual online
BD-HP22H/S
4 – 5
3. OPERATION/LCD UNIT
The reproduced audio signal does not come from each audio output terminal.
Is the audio signal outputted from J2401?
YES
NO
Check the pattern up to J2401.
Check the connected cable and its connection tightness.
Check also the input of connected TV set or amplifier.
Check also the input of connected TV set or amplifier.
Disconnect CN2301. Is there the audio signal at SC5601?
Does the mute circuit function?
Is the audio signal inputted to J2401?
Check the mute circuit and the AUDIO_MUTE signal lines.
Muting occurs when AUDIO_MUTE signal are at "H" level.
Muting occurs when AUDIO_MUTE signal are at "H" level.
YES
NO
Are there the following input audio signals at CN2301?
pin (16)
AUD_MAIN_L
pin (18)
AUD_MAIN_R
MAIN FLOW CHART No.4
NO
NO
YES
YES
Check the pattern up to R2212 and R2213.
NO
Check each terminal.
YES
FLOW CHART No.2
The remote controller does not function.
The main unit controls function, but the remote controller
controls fail to function.
controls fail to function.
YES
YES
Check the line between pin (1) of RMC1101 and pin (23) of IC2503.
Check the remote control codes 1, 2 and 3.
Using the remote controller, is the "L" pulse signal outputted
from pin (1) of RMC1101?
from pin (1) of RMC1101?
Is the "L" pulse signal inputted to pin (23) of IC2503?
Replace RMC1101 or the remote control receiver.
NO
NO
Is the remote control code as specified?
NO
YES
Is the 5V voltage applied to pin (3) of the RMC1101 remote
control receiver?
control receiver?
Check the AT_5V line.
NO
YES
Check IC2503. Replace it as required.
YES
FLOW CHART No.1
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