DHC-MD373, HCD-MD373 - 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)”.

Note 1: About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11)
buttons. These operations are indicated as  “R”  in this manual.
Example:  MENU/NO “R”  ...Press the MENU/NO button of the remote commander.

Note 2:
Incorrect operations may be performed if the test mode is not set properly.
In this case, press the  RESET  button of the back panel.

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 “R”  button to
exit the mode.

1. When the power ON, press the  

1/u  button while pressing the  p (MD)  button and  r REC  button together.

2. Press the  

=0/MD/CD/TUNING –  button or  )+/MD/CD/TUNING +  button and when “[Service]” is displayed, press the

ENTER/YES “R”  button. (If nothing is displayed, press the  FUNCTION  button and set the function to “MD”.)

3. Press the  

=0/MD/CD/TUNING –  button or  )+/MD/CD/TUNING +  button  and display “ERR DP MODE”.

4. Pressing the  ENTER/YES “R”   button sets the error history mode and displays “total rec”.
5. Select the contents to be displayed or executed using the  

=0/MD/CD/TUNING –  button or  )+/MD/CD/TUNING +  button.

6. Pressing the  SYNC REC  button will display or execute the contents selected.
7. Pressing the  SYNC REC  button another time returns to step 4.
8. Pressing the  MENU/NO “R”  button displays “ERROR DP MODE” and exits the error history mode.
9. To exit the test mode, press the  REPEAT/STEREO/MONO  button. The unit sets into the STANDBY state, and the test mode ends.