Yamaha MDX-E100 Service Manual page 25

Disc motor does not run.
Is a correct waveform provided at No.24 and 25 pins of IC1201
during the focus gain rough adjustment step in the test mode?
YES
Is a waveform provided at No.11 and 12 pins of IC1601 as
well as at No.1 and 2 pins of CN1603?
YES
Replace the disc motor as a complete unit.
Tracking servo function does not work.
Is a correct waveform provided at No.17 and 18 pins of IC1601 as
well as at No.1 and 3 pins of CN1101 during the tracking gain
adjustment step in the test mode?
YES
Replace the pickup head
Slide servo function does not work.
Does the pickup move outward and inward when the R and
E button is pressed respectively in the test mode?
NO
Does a change occur at No.22 and 23 pins of IC1201 when
R and E buttons are pressed?
YES
Does a change occur at No.13 and 14 pins of IC1601 and No.1 and
2 pins of CN1602 when the R and E buttons are pressed?
YES
Does a voltage change occur at the + and - terminals of the
slide motor when the R and E buttons are pressed?
YES
Replace the slide motor.
NO
Check No.24 and 25 pins of IC1201 as well as soldering
and parts of the peripheral circuit.
NO
Check the circuit boards of IC1601 and the complete disc
motor of CN1601 for soldering.
NO
Check No.20 and 21 pins of IC1201, IC1601 and CN1101
for soldering.
YES
Check the waveform at No.22 and 23 pins of IC1201,
peripheral parts and soldering.
NO
Check the waveform at No.22 and 23 pins of IC1201,
peripheral parts and soldering.
NO
Check IC1601 and 1602 for soldering.
NO
Check the connection section to the slide motor for
soldering and broken wire.
MDX-E100
24