Sony MDS-JA555ES Service Manual page 4

The self-diagnosis function consists of the error codes for users and those for service engineers. The error codes for users appear automati-
cally when an error occurs. The error codes for service engineers can be accessed by entering the test mode during servicing and by viewing
the error history display. The error codes for users are shown below that are extracted from Operation Manual. For the error codes for service
engineers, refer to the subsequent paragraph "How to Operate the Self-diagnosis Function (Error History Display Mode)".
How to Operate Self-diagnosis Function (Error History Display Mode)
Note: The self-diagnosis function is performed using the "error history display mode" using the test mode. The following procedure
describes only the minimum required operating procedure to enter the error history mode. Therefore be careful not to enter any other
modes by mistake. If you have entered any other modes by mistake, press the MENU/NO button and exit the mode.
1. While pressing the lAMSL knob and the x button at the same time, connect the AC power plug to the wall outlet, then remove
your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message
"[Check]" appears and the STANDBY, PITCH CONTROL, and FILTER LEDs turn on.
2. Rotate the lAMSL knob until the message "Service" appears. Then press the YES button.
3. Rotate the lAMSL knob until the message "ERR DP MODE" appears.
4. Press the YES button to enter the error history mode and the message "total rec" appears.
5. Select the desired item to display or to execute using the lAMSL knob.
6. Press the lAMSL knob to display or execute the selected item.
7. Pressing the lAMSL knob again returns to the display of step 4.
8. To exit the error history mode, press the MENU/NO button. The message "ERR DP MODE" appears to exit the error history mode.
9. To exit the test mode, press the REPEAT button. The test mode display disappears and the PITCH CONTROL and FILTER LEDs are
turned off. The MDS-JA555ES enters the standby state exiting the test mode. While pressing the ?/1 button, turn on the main power.
The message "Initialize" flashes and the MDS-JA555ES is initialized.
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SELF-DIAGNOSIS FUNCTION