Sharp CD-MD3000H Service Manual page 91

• Disc loading is not normal.
Is disc loaded when it is inserted?
No
Is +5V to +6V applied to the pins 17 and 18 of CN1501?
Yes
Is pulse input in the pin 6 of CN1501 when reset power supply
is turned on?
Yes
Is +3.2V applied to the pin 62 of IC1401?
Yes
Is pulse of 8.4672MHz applied to the pin 15 of IC1401?
Yes
Is pulse output from the pin 34 of IC1401?
Yes
Is the pin 5 of CN1401 set to H state?
Yes
Is change observed on the pin 19 or 20 of IC1601?
Yes
Is change observed on the pin 12 or 13 of IC1601?
Yes
Check M903
Yes
Is ejection performed when the MD taking-out button is
pressed?
Yes
Disc retracts soon after completion of disc ejection.
Yes
Check SW1932.
Yes
Check the power PWB, Main PWB, and
No
CN1501.
No
Check the periphery of Q1804 and
No
IC1401.
No
No
Check CN1401,CN1931 and SW1932.
No
No
No
Check CN1401,CN1931 and IC1601.
No
No
– 91 –
CD-MD3000H/CD-MD3000W
Check the Main PWB and CN1501.
Check IC1201.
Check IC1401.
Check IC1401.