Sony MXD-D4 Service Manual page 30

8. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up.
To perform this test mode, the laser power must first be checked.
Perform AUTO CHECK after the laser power check and Iop check.
Procedure:
[YES]
1. Press the button. If "LDPWR
perform the laser power check and Iop compare, and then repeat from step 1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
"DISC IN" will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded.
3. If a disk is loaded at step 2, the check will start automatically.
4. When "XX CHECK" is displayed, the item corresponding to XX will be performed.
When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1.
5. When the disc is loaded in step 4, the check will automatically be resumed from "07 CHECK".
6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item
is NG, it will be displayed as "NG:xxxx".
When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread
motor, etc.
When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
9. INFORMATION
Display the software version.
Procedure:
1. If displayed as "INFORMATION", press the
2. The software version will be displayed.
[MENU/NO]
3. Press the button to end this mode.
10. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, "E0001/MEMORY NG" will be displayed so that the MD deck does not continue operations.
In this case, set the test mode promptly and perform the following procedure.
Procedure:
1. Set the test mode (refer to page 26).
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be
displayed "INIT EEP?".
3. Press the x (MD) button and
[ AMS
4. Rotate the l L
[ AMS
5. Press the
l L
message to select the test mode will be displayed.
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" is displayed, it means that the laser power check has not been performed. In this case,
[YES]
button.
[ EJECT]
A button together.
]
(MD) knob and select MDM-7X2A.
]
(MD) knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a