DHC-MD313, HCD-MD313 (serv.man2) - Sony Audio Service Manual (repair manual). Page 15

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1. As loading related operations will be performed regardless of

the test mode operations being performed, be sure to check that
the disc is stopped before setting and removing it.  Even if
the

§ (MD) button is pressed while the disc is rotating during

continuous playback, continuous recording, etc., the disc will
not stop rotating.  Therefore, it will be ejected while rotating.
Be sure to press the

§ (MD) button after pressing

the

^ (CD) button and the rotation of disc is stopped.

2. The erasing-protection tab is not detected in the test mode.

Therefore, operating in the recording laser emission mode and
pressing the

r REC button, the recorded contents will be

erased regardless of the position of the tab.  When using a disc
that is not to be erased in the test mode, be careful not to enter
the continuous recording mode and traverse adjustment mode.
But “CREC MODE”, “EF MO CHECK” and “EF MO AD-
JUST” is detect the erasing-protection tab and recording laser
power off.

1. Continuous recording mode (CREC MODE)
2. Traverse adjustment mode (EF MO ADJUST)
3. Laser power adjustment mode (LDPWR ADJUST)
4. Laser power check mode (LDPWR CHECK)
5. When pressing the

r REC button.

6. Traverse checking mode (EF MO CHECK)

With the power supply to the set in OFF (standby) status, while
pressing the PLAY MODE button and

^ (MD) button simul-

taneously, then release the button.

Press the  REPEAT  button, and the power is turned OFF (standby
status), and the set becomes ready for normal operation.

All operations are performed using the VOLUME knob button,

p (CD) button, and ^ (CD) button.  The functions of these

buttons and knob are as follows.

Thirteen test modes are selected by turn VOLUME.

• For detailed description of each adjustment mode, refer to the “5.

ELECTRICAL ADJUSTMENTS”.

• If a different adjustment mode has been selected by mistake, press

the

^ (CD) button to exit from it.

*1: The EEP MODE, Scurve CHECK, MANUAL CMD VERIFY

MODE, SLED MODE, ACCESS MODE, 0920 CHECK,
WRITE sure?, HEAD ADJUST and SVDATA READ are not
used in servicing.  If set accidentally, press the

^ (CD) but-

ton immediately to exit it.

Display

Contents

TEMP CHECK

Temperature compensation offset check

LDPWR CHECK

Laser power check

EF MO CHECK

Traverse (E-F balance) check

EF CD CHECK

Travers (Pre mastered disk) check

FBIAS CHECK

Focus bias check

CPLAY MODE

Continous playback mode

CREC MODE

Continous recording mode

Scurve CHECK

S-curve check (*1)

VERIFY MODE

Non-volatile memory check (*1)

DETRK CHECK

Detrack check

TEMP ADJUST

Temperature compensation offset adjustment

LDPWR ADJUST

Laser power adjustment

EF MO ADJUST

Traverse (E-F balance) adjustment

EF CD ADJUST

Traverse (Pre mastered disk) adjustment

FBIAS ADJUST

Focus bias adjustment

EEP MODE

Non-volatile memory mode (*1)

MANUAL CMD

Manual command transfer mode (*1)

SVDATA READ

Data reading out mode (*1)

ERR DP MODE

Operation of error histories memory

SLED MOVE

Operation of sled moter (*1)

ACCESS MODE

Access check (*1)

0920 CHECK

Outermost periphery check (*1)

WRITE sure?

Non-volatile memory initialize

HEAD ADJUST

HEAD adjustment check (*1)

CPLAY2MODE

Continous playback mode

CREC2MODE

Continous recording mode

Button & Knob

Function

VOLUME knob

Changes parameters and modes.

 

p (CD) button

Proceeds onto the next step.
Finalizes input.

 

^ (CD) button

Returns to previous step.
Stops operations.