DHC-EX880MD, DHC-MD717, MDS-EX880, MDS-MS717 - Sony Audio Service Manual (repair manual). Page 11

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

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

[REC1]

 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.

2. Using MD slot is “MD1” only.

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 

[REC1]

 button.

6. Traverse checking mode (EF MO CHECK)

1. Turn on the set, and select the MD function.
2. Place the MD in “NO DISC” status (No disc present in stocker

and inside of set)

3. Press 

[DISPLAY]

 button, 

[MD1]

 button, and

p button simul-

taneously to activate the Test mode.
When the Test mode is activated.  “TEMP CHECK” is dis-
played on fluorescent indicator tube.

1. In the Test mode, use the slot 1 only.  (Do not load a disc in

other slots.)

2. When a disc is loaded in slot 1, in several seconds it will be

automatically pulled in.

3. To unload a disc, press  

§ button .

4. To load a disc again, press  

§ button .

5. In the Test mode, MD1, 2, 3 LEDs do not light regardless of

whether a disc is present or not.

Press the 

[REPEAT]

 button, and the set returns to normal mode.

(If 

[REPEAT]

 button is pressed with a disc loaded, the disc is

automatically ejected.)

All operations are performed using the 

[     

=

 

        SELECTOR      

+

 

        ]

dial,

[ENTER/YES]

button, and

[MENU/NO]

button.  The func-

tions of these buttons and dial are as follows.

Button & dial

Function

= SELECTOR + dial

Changes parameters and modes.

ENTER/YES button

Proceeds onto the next step.
Finalizes input.

MENU/NO button

Returns to previous step.
Stops operations.

Twenty six test modes are selected by turn the

[     

=

 

        SELECTOR      

+

 

        ]

dial.

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

“5. ELECTRICAL ADJUSTMENTS” (page 14).

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

press the 

[MENU/NO]

 button to exit from it.

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

CMD, SVDATA READ, SLED MOVE, ACCESS MODE,
0920 CHECK, WRITE sure?, HEAD ADJUST,
CPLAY2MODE, and CREC2MODE are not used in servic-
ing. If set accidentally, press the 

[MENU/NO]

 button immedi-

ately 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

Continuous playback mode

CREC MODE

Continuous recording mode

ScurveCHECK

S-curve check (*1)

VERIFYMODE

Non-volatile memory check (*1)

DETRK CHECK

Detrack check

TEMP ADJUST

Temperature compensation offset adjust-
ment

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 motor (*1)

ACCESS MODE

Access check (*1)

0920 CHECK

Outermost periphery check (*1)

WRITE sure?

Non-volatile memory initialize  (*1)

HEAD ADJUST

HEAD adjustment check (*1)

CPLAY2MODE

Continuous playback mode  (*1)

CREC2MODE

Continuous recording mode  (*1)