MDS-SP55 - 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 (MD)
to exit the mode.

1. When the power OFF (STANDBY), press the  ?/1  button (TA) while pressing the  s  button (MD) and  ENTER/YES  button (MD)

together.

2. Press the  MENU/NO  button, and when “Check” is displayed.
3. Rotate the  l L  knob (MD) and when “[Service]” is displayed, press the  ENTER/YES  button (MD).
4. Rotate the  l L  knob (MD) and display “ERR DP MODE”.
5. Pressing the  ENTER/YES  button (MD) sets the error history mode and displays “total rec”.
6. Select the contents to be displayed or executed using the  l L  knob (MD).
7. Pressing the  CD SYNC REC  button (MD) and to execute the contents selected.
8. Pressing the  CD SYNC REC  button (MD) another time returns to step 5.
9. Pressing the  MENU/NO  button (MD) displays “ERROR DP MODE” and exits the error history mode.
10.To exit the test mode, press the  ?/1  button (TA). The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.

This system has a Self-diagnosis display function
to let you know if there is a system malfunction.
The display shows a code made up of three letters
and a message alternately to show you the
problem. To solve the problem refer to the
following list. If any problem persists, consult
your nearest Sony dealer.

The MD is protected against erasure.
cRemove the MD and slide the tab to close the

slot (See page 11).

You tried to record a CD or MD with a format
that the system does not support, such as a CD-
ROM.
cRemove the disc and turn off the system once,

then turn it on again.

Recording could not be performed properly.
cMove the system to a stable place, and start

recording over from the beginning.

The MD is dirty or scratched, or the MD does
not meet the standards.
cReplace the MD and start recording over from

the beginning.

The MD deck cannot read the disc information
properly.
cRemove the MD once, then insert it again.

The MD deck cannot read the disc information
properly.
cReplace the MD.
cErase all the recorded contents of the MD

using the All Erase function (See page 32).

The sound source is a copy of a commercially
available music software, or you tried to record
a CD-R (Recordable CD).
cThe Serial Copy Management System

prevents making a digital copy .
You cannot record a CD-R (see page 43).

This appears momentarily because of the signal
of the digital broadcast during recording.
cThere is no affect on the recorded contents.
No component is connected to the DIGITAL
OPTICAL IN jack, or a digital component is
not connected properly.
cConnect a digital component to the DIGITAL

OPTICAL IN jack properly using a digital
connecting cable (an optical cable) (not
supplied  (See page 39).

The connected digital component is not turned
on.
cSee the operating instructions supplied with

the connected component and confirm
whether the component is turned on.

The digital connecting cable (an optical cable)
connected to the DIGITAL OPTICAL IN jack
is pulled out, or the connected digital
component is turned off during digital
recording.
cConnect the cable, or turn on the digital

component.