Sharp MD-E9000H Service Manual page 75

Check in the test mode
• The spindle motor does not rotate.
Is waveform output from the pin 25 of IC1201 in the step 4 of
AUTO auxiliary adjustment mode of TEST mode ?
Yes
Is waveform output from the pins 9 and 10 of IC1601 and the
pins 5 and 6 of CN1401 ?
Yes
Replace with a spindle motor (complete).
• The sled motor does not rotate.
Do the pin 23 of IC1201 change with the
Yes
Do the pins 14 and 15 of IC1601 and the pins 1 and 2 of CN1401
change with the / button ?
Yes
Does voltage of the + and - terminals on the sled motor
change with the / button ?
Yes
Replace the sled motor.
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No
No
/ button ?
No
No
No
– 75 –
Check the pin 25 of IC1201, soldering of peripheral circuit, and parts.
Check IC1601, CN1401, and soldering of mechanism switch PWB.
Check the waveform of pin 23 of IC1201, peripheral parts, and
soldering.
Check IC1601 and soldering of CN1401.
Check the soldering connected to the sled motor and for
disconnection.
MD-E9000H