MD-X60H
– 72 –
TROUBLESHOOTING (CD SECTION)
When the CD does not function
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
• The CD tray fails to operate.
Check the changer mechanism cam switch (SWB101 to
SWB104) and tray switch (SWB105 to SWB108).
Yes
Yes
Check the connection between IC901 and SW.
No
ICheck whether output of pins 3 and 7 of main cam motor
driver IC92 is normal.
Check the connection from IC2 of pins 24 and 25 to IC92.
No
Yes
Check whether the output of pins 3 and 7 of tray motor driver
IC91 is normal.
Yes
Check the motors MOB1 and MOB2.
No
Check the connection from IC2 of pins 26 and 27 to IC9.
Check whether state changes to Low when
IC901 pin 29 to 36 and cam SW1 (SWB 105 to SWB 108)
is on.
pin 30 cam SW2
pin 31 cam SW3
pin 32 cam SW4
is on.
Check whether state changes to Low when
IC901 pin 33 tray SWA.
pin 34 cam SWB
pin 35 cam SWC
pin 36 cam SWB
is on.
• The CD function will not work.
Yes
Yes
Check the waveform of SCK, SO (DATA) and SI (COMM).
Check the waveform of IC2 pin 65 (SQOUT), pin 66 (COIN), and
pin 67 (CQCK).
Check the CD, DSP, power supply, and 16.93 MHz clock and
reset terminal IC2 pin 68.
Yes
Yes
If the items mentioned above are OK, check the main
microcomputer IC901.
Check that the pickup is in the PICKUP IN switch position of
SW702A.
The CD operating keys don't work