HCD-MDX10 - Sony Audio Service Manual (repair manual). Page 3

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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. With the power ON, press the  CD-MD SYNC  button while pressing the  

p  and  ENTER/YES  buttons together.

2. Rotate the  AMS  dial and when “Service” is displayed, press the  YES  button.
3. Rotate the  AMS  dial and display “ERR DP MODE”.
4. Pressing the  ENTER/YES  button sets the error history mode and displays “total rec”.
5. Select the contents to be displayed or executed using the  AMS  dial.
6. Pressing the  MD WALKMAN SYNC  button will display or execute the contents selected.
7. Pressing the  MD WALKMAN SYNC  button another time returns to step 4.
8. Pressing the  MENU/NO  button displays “ERROR DP MODE” and exits the error history mode.
9. To exit the test mode, press the  REPEAT/STEREO/MONO  button.