Hyundai H-MS1107, Service Manual

Page: 17 / 25

Page 16
Maintenance procedure for the karaoke part is as follows:
No sound from the microphone
Turn the volume knob according to
the explanation.
Check the MIC port is in good
contact or not.
YES
Check if the shielded line between
the MIC seat and the volume
potentiometer is normal or not.
Check the shielded line between the
volume potentiometer and the
operational amplifier IC is normal or
not.
Check if the operational amplification
circuit and the reverberation IC are
working normally or not.
Replace the MIC seat.
Replace the shielded line.
Replace with a potentiometer of the
same model.
Replace the shielded line.
NO
NO
NO
NO
NO
YES
YES
YES
Check if the MIC volume
potentiometer is normal or not.
YES
YES
Replace them with ICs or
electronic components of the same
model.
Check if the volume knob is turned
off or not.