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Symptom
Individual symptom
3 CD-related
CD loading is not possible.
CD ejection is not possible.
The CD is not recognized correctly.
The CD does not turn.
The shutter does not open and close.
The shutter motor operates
continuously.
Recording of CD title information is not
possible.
4 SD-related
No recognition
Reading is not possible.
5 Turntable-related
No turning
Unwanted rotation at the time of power
supply start
Forward/reverse switching is not
possible.
Bad brake effectiveness
The turntable turns, but no audio is
heard.
Irregular rotation
Vacillation of the stroboscope with -50%
slow rotation
Possible causes
Defective +7 V CD motor power supply
Defective CD unit
Defective wiring of the CD eject button
Defective wiring between MAIN and CD unit
Defective wiring between MAIN and CD unit
Defective CD control signal
Defective media microcomputer
Defective CD unit
Defective +7 V CD motor power supply
Defective CD unit
Defective shutter motor
Defective motor drive circuit
Defective connection between MAIN and
CDOPSW circuit board
Defective shutter open/close detection switch Defective SW2301, SW2302 on the CDOPSW circuit
Defective record EEROM
Defective SD lid open/close detection switch
Defective SD I/F IC
Defective SD key writing
Defective SD I/F IC
Defective operation of the microcomputer on
the media side
Defective connection between MAIN and
JACK circuit board
Defective connection between JACK and
MOTOR circuit board
Defective motor control IC
Defective rotation pulse output
Defective motor start signal output
Defective motor
Defective +3.3 V microcomputer power supply Confirmation of the +3.3 V power supply of the POWER
Defective connection between MAIN and
JACK circuit board
Defective switching signal
Defective connection of the forward/reverse
switch
Defective motor control IC
Defective rotation detection sensor
Defective connection between SENSOR and
relay circuit board
Defective rotation detection FG circuit
Defective motor control IC
Defective motor torque switching circuit
Defect location, countermeasures
Confirmation of the +7 V power supply of the POWER
circuit board
Check that approx. +7 V is applied to C19 on the MAIN
circuit board.
CD unit replacement
Confirmation of the wiring between MAIN and CDOPSW
circuit board
Confirmation of the wiring between CDOPSW circuit
board and EJECT circuit board
Connection confirmation, FFC cable replacement
Connection confirmation, FFC cable replacement
IC3, IC5, IC21, IC22, IC27, and IC29 on the MAIN
circuit board and their surroundings
IC34 on the MAIN circuit board and its surroundings
CD unit replacement
Confirmation of the +7 V power supply of the POWER
circuit board
Check that approx. +7 V is applied to C19 on the MAIN
circuit board.
CD unit replacement
Shutter motor and its surroundings
Q2, Q3, Q10, and Q11 on the MAIN circuit board and
their surroundings
Confirmation of the wiring between MAIN and CDOPSW
circuit board
Confirmation of the wiring between CDOPSW and motor
board
IC16 on the MAIN circuit board and its surroundings
SW1 on the MAIN circuit board and its surroundings
IC17 and CN4 on the MAIN circuit board and their
surroundings
SD key rewriting
IC17, CN4, and Q4 on the MAIN circuit board and their
surroundings
IC34 on the MAIN circuit board and its surroundings
Connection confirmation, FFC cable replacement
Pay attention to the orientation.
Connection confirmation, cable replacement
IC2003 and IC2005 on the JACK circuit board and their
surroundings
IC2 and CN7 on the MAIN circuit board and their
surroundings
JACK circuit board IC2003
IC2 and CN7 on the MAIN circuit board and their
surroundings
JIC2003 and Q2010 on the JACK circuit board and their
surroundings
Motor circuit board replacement
circuit board
Check that +3.3 V is applied to C14 on the MAIN circuit
board.
Connection confirmation, FFC cable replacement
Pay attention to the orientation.
Q2003 on the JACK circuit board and its surroundings
Confirmation of the connection between CP2 and CP3
IC2003 and IC2005 on the JACK circuit board and their
surroundings
SENSOR circuit board SENSOR replacement
Confirm lighting of the SENSOR LED.
Connection confirmation, cable replacement
IC2003 and Q2009 on the JACK circuit board and their
surroundings
IC2003 and IC2005 on the JACK circuit board and their
surroundings
IC2007, IC2008, Q2019, and Q2020 on the JACK circuit
board and their surroundings
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