DHC-MD777, HMC-MD777 - Sony Audio Service Manual (repair manual). Page 2

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The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes
which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the
following box  in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for
using the Self-Diagnosis Function (Error History Display Mode)”.

Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required procedure. Be
careful not to enter other modes by mistake. If you set other modes accidentally, press the

[MENU/NO]

button to exit the mode.

1. While pressing the both

[ENTER/YES]

and

π buttons, turn the power ON.

(“TEMP CHECK” will be displayed)

2. Press the

[MENU/NO]

button to display “[CHECK]”.

3. Turn the

≠

↔

± dial and when “[Service]” is displayed, press the

[ENTER/YES]

button.

4. Turn the

≠

↔

± dial to display “ERR DP MODE” (C17).

5. Press the

[ENTER/YES]

button to sets the error history mode and displays “total rec”.

6. Select the contents to be displayed or executed using the

≠

↔

± dial.

7. Press the

[MD WALKMAN SYNC]

button to display or execute the contents selected.

8. Press the

[MD WALKMAN SYNC]

button again and returns to step 5.

9. When press the

[MENU/NO]

button to displays “ERROR DP MODE”, exits the error history mode.

10. To exit the test mode, press the

[REPEAT]

button. The disc is ejected when loaded, and set will be normal mode.