CMT-PX333, HCD-PX333 - Sony Audio Service Manual (repair manual). Page 36

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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 Compare.

Procedure:
1. Press the

.

 “R”

or

>

 “R”

button to display “AUTO CHECK” (C01).

2. Press the

ENTER/YES “R”

button. If “LDPWR 

 ” is displayed, it means that the laser power check has not been performed. In

this case, perform the laser power check and Iop Compare, and then repeat from enter the MD test mode.

3. 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.

4. If a disc is loaded at step 3, the check will start automatically.
5. When “XX CHECK” is displayed, the item corresponding to XX will be performed.

When “06 CHECK” completes, the disc loaded at step 3 will be ejected. “DISC IN” will be displayed. Load the check disc (TDYS-1).

6. When the disc is loaded in step 5, the check will automatically be resumed from “07 CHECK”.
7. 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 other parts (spindle motor,
sled motor, etc.).
When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.

Display the software version.

Procedure:
1. Press the

.

 “R”

or

>

 “R”

button to display “INFORMATION” (C31).

2. Press the

ENTER/YES “R”

button.

3. The software version will be displayed.
4. Press the

MENU/NO “R”

button to end this mode.