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– 8 –

The IOP value labeled on the pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look
at the value on the label of the optical pick-up. When replacing the pick-up or non-volatile memory (IC171 on BD (MD) board), record the
IOP value on the pick-up according to the following procedure.

Record Precedure:
1. Enter the test mode. (See the “SECTION 5 TEST MODE” for detail of test mode)
2. Turn the

≠

↔

± dial to display “[Service]”, and press the

[ENTER/YES]

button.

3. Turn the

≠

↔

± dial to display “lop.Write” (C28), and press the

[ENTER/YES]

button.

4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
5. Input the IOP value written on the optical pick-up.

To select the number: Turn the

≠

↔

± dial.

To select the digit

: Press the

[MD WALKMAN SYNC]

button.

6. When the

[ENTER/YES]

button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

7. As the adjustment results are recorded for the step 6. value. Leave it as it is and press the

[ENTER/YES]

button.

8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop

Write”.

9. Press the

[REPEAT]

button to complete, and the set returns to normal mode.

Display Precedure:
1. Enter the test mode. (See the “SECTION 5 TEST MODE” for detail of test mode)
2. Turn the

≠

↔

± dial to display “[Service]”, and press the

[ENTER/YES]

button.

3. Turn the

≠

↔

± dial to display “Iop Read” (C27).

4. Press the

[ENTER/YES]

button. “@@.@/##.#” is displayed and the recorded contents are displayed.

@@.@ : indicates the Iop value labeled on the pick-up.
##.#

: indicates the Iop value after adjustment

5. To end, press the

[MENU/NO]

button to display “Iop Read”. Then press the

[REPEAT]

button, and the set returns to normal mode.

This mode is test for fluorescent indicator tube, LED, buttons and jog dial.
This mode can not exit in the middle of the test, therefore finish the test when enter this mode.

Fluorescent Indicator Tube and Buttons Test Mode
1. While pressing the both

[ENTER/YES]

and

[REC]

buttons, turn the power ON.

2. After display “FL AllOn key”, lights up all segments on fluorescent indicator tube immediately.
3. Press every buttons of except

[MD WALKMAN SYNC]

button on the MD section, then each segment goes off and remain the “L-

SYNC”.

4. Press the

[MD WALKMAN SYNC]

button to display “Push YES”.

5. Press the

[ENTER/YES]

button and switch over to next check mode “5x7 Segments on Fluorescent Indicator Tube check”.

1. After display “Seg Chk”, 5x7 segments part changes to display mesh pattern immediately.
2. Press the

[ENTER/YES]

button to display “Jog & LED”, and switch over to next check mode “JOG & LED Check”.

1. Each time the

≠

↔

± dial is turned,

[MD WALKMAN SYNC]

LED lights on/off and

[MD1-5]

LED color changes into green/

amber.

2. Press the

[ENTER/YES]

button to display “Check End!”.

Press the

[ENTER/YES]

button: Exit to “Display Test Mode” and enter the other test mode.

Press the

[MENU/NO]

button : Repeat the “Display Test Mode”

– 9 –

Error Message

Contents

NG TOCWRITE Disagree count of aging cycle and TOC.

NG CHACKING Time over (20 seconds) , when tried chucking

NG RELEAS

Time over (20 seconds) , when tried eject.

MECHA ERR

Mechanical error, after retry two times.

NG RECPAUSE Did not REC pause condition. (Head did not down, or etc.)

NG REC 5s

Could not start recording.

NG BLANK

Could not all erase.

Record 5 seconds repeat to each five discs.

 Aging mode can not perform, if disconnect to the pre-main amplifier and tuner unit (STR-MD777) of DHC-MD777.

1. Insert recordable discs in all MD disc slots.
2. Press the

) and

[REC MODE]

buttons simultaneously for a moment, then

π and

[REC]

buttons simultaneously for a few

seconds.

3. Enter the Aging Mode and start loading DISC1.

Press the

[MENU/NO]

button.

However exiting the aging mode, it continues performing action.

Normal displays in recording, but displays as follow when change the disc.

 D- :

*

•“

” indicates the count of complete cycle.

•“D- ” indicates disc slot No. of active disc.
•“:

*

” indicates that loading is on.

Displays “

 D- :

*

” and error message alternately when error happened.

*1) Can not operation, when head is down (S6: off).
*2) Make it sure to perform these operations after pressing the MD1 to 5 button and elevator up/down to each MD slot position.
*3) Make it sure to perform these operations are after elevator downs to home position (bottom). Because, these operations no have

relation to with the elevator position.

LEDs of MD1 to 5 turn on (green) when press MD1 to 5 button and elevator up/down to each MD slot position. (Once turned on LED does
not turn off until exit the changer test mode)
When insert disc in the disc slot and disc1 to 5 switch (S1 to 5) turn on, change the color to amber.

Function

Contents

)

Elevator up. Stop when reset switch (S571) is turned on (*1)

CLEAR

Elevator down. Stop when home switch (S570) is turned on (*1)

REC

Loading in. Stop when loading in switch (S573) is turned on (*1, 2)

π

Loading out. Stop when loading out switch (S572) is turned on (*1, 2)

NAME EDIT Head down. Stop when head down switch (S7) is turned on (*3)

1/ALL

Head up. Stop when head up switch (S6) is turned on (*3)

MD1 to 5

Elevator up/down to each MD slot (slit) position (*1)

Press the

0 or

[CLEAR]

button to clear the error, and restart the aging mode.

1. While pressing the both

[ENTER/YES]

and

fl buttons, turn the power ON.

2. Display “CHANGER TEST!!” and enter the changer test mode.

Press the

[ENTER/YES]

button to normal mode.

Refer to the following operations, and each button except MD1 to 5 is active while it is pressed.

– 10 –

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “5 Electrical Adjustments”.

• 0.9 mW power

Specified value : 0.84 to 0.92 mW

• 7.0 mW power

Specified value : 6.8 to 7.2 mW

lop (at 7mW)

• Labeled on the optical pickup

Iop value ± 10mA

• Traverse waveform

Specified value : Below 10% offset

• Error rate check

Specified value : For points a, b, and c
C1 error : Below 220
AD error : Below 2

• Error rate check

Specified value:
a.

When using test disc (MDW-74/AU-1)
C1 error : Below 80
AD error : Below 2

b.

When using check disc (TDYS-1)
C1 error : Below 50

• CPLAY error rate check

Specified value:
C1 error : Below 80
AD error : Below 2

• If NG, displayed as “T=@@ (##) [NG]”

(@@, ## are both arbitrary numbers)

Laser power check
(See page 33)

Traverse check
(See page 33)

Focus bias check
(See page 34)

C PLAY check
(See page 34)

Self-recording/playback
check
(REC/PLAY)
(See page 34)

Temperature
compensation
offset check
(See page 35)

Criteria for Determination
(Unsatisfactory if specified value is not satisfied)

• Clean the optical pick-up
• Adjust again
• Replace the optical pick-up

• Replace the optical pick-up

• Replace the optical pick-up

• Replace the optical pick-up

• Replace the optical pick-up

If always unsatisfactory:
• Replace the overwrite head
• Check for disconnection of the circuits around the

overwrite head

If occasionally unsatisfactory:
• Check if the overwrite head is distorted
• Check the mechanism around the sled

• Check for disconnection of the circuits around

D101 (BD (MD) board)

• Check the signals around IC101, IC121, CN102,

CN103 (BD (MD) board)

Measure if unsatisfactory:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
When performing adjustments, use the specified values for adjustments.

– 11 –

1

1kHz/0dB/L&R

22

1kHz/-90dB/L&R

2

20Hz/0dB/L&R

23

Infinity Zero w/o emphasis//L&R

3

40Hz/0dB/L&R

24

Infinity Zero with emphasis//L&R

4

100Hz/0dB/L&R

25

400Hz+7kHz(4:1)/0dB/L&R

5

200Hz/0dB/L&R

26

400Hz+7kHz(4:1)/-10dB/L&R

6

500Hz/0dB/L&R

27

19kHz+20kHz(1:1)/0dB/L&R

7

1kHz/0dB/L&R

28

19kHz+20kHz(1:1)/-10dB/L&R

8

5kHz/0dB/L&R

29

100Hz/0dB/L*

9

7kHz/0dB/L&R

30

1kHz/0dB/L*

10

10kHz/0dB/L&R

31

10kHz/0dB/L*

11

16kHz/0dB/L&R

32

20kHz/0dB/L*

12

18kHz/0dB/L&R

33

100Hz/0dB/R*

13

20kHz/0dB/L&R

34

1kHz/0dB/R*

14

1kHz/0dB/L&R

35

10kHz/0dB/R*

15

1kHz/-1dB/L&R

36

20kHz/0dB/R*

16

1kHz/-3dB/L&R

37

100Hz  Squer Wave//L&R

17

1kHz/-6dB/L&R

38

1kHz  Squer Wave//L&R

18

1kHz/-10dB/L&R

39

1kHz  w/emphasis/-0.37dB/L&R

19

1kHz/-20dB/L&R

40

5kHz  w/emphasis/-4.53dB/L&R

20

1kHz/-60dB/L&R

41

16kHz  w/emphasis/-9.04dB/L&R

21

1kHz/-80dB/L&R

TRACK

No.

Displayed Contents

The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.

TRACK

No.

Displayed Contents

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313: 4-989-366-01) is used for checking the display.
To check, perform the following procedure.

1. Turn ON the power, set the disc to the disc tray with the “test disc” label facing up, and chuck the disc.
2. Press the

· button and play back the disc.

3. The following will be displayed on the fluorescent indicator tube.

Display: 1kHz/0 dB/ L&R

4. Turn the

≠

↔

± dial or press the ≠ / ± (CD) button on remote commander and select the track. The text data of each

track will be displayed.
For details of the displayed contents for each track, refer to “Table 1: CD-TEXT TEST DISC TEXT Data Contents” and “Table 2: CD-
TEXT TEST DISC Recorded Contents and Display”.

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For
details, refer to “Table 2: CD-TEXT DISC Recorded Contents and Display”.