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9

Error Code

Description

10

11

12

20

21

22

23

24

30

31

40

41

42

43

50

51

60

Could not perform loading

The changer error occurred

Loading switches combined incorrectly

Timed out without reading the top of PTOC

Could read top of PTOC, but detected error

Timed out without accessing UTOC

Timed out without reading UTOC

Error in UTOC

Could not start playback

Error in sector

A cause of retry occurred during normal recording

Retried due to DRAM overflow

Retry occurred during TOC writing

Retry aborted during S.F editing

Other than access processing, and could not read address.

Focus NG occurred and overran.

High speed synchronize recording of unlock retry.

10

Disassemble the MD mechanism deck and the MD DIGITAL board.
Connect the wire (flat type, 25 cores) as shown in the figure to
check the tape mechanism.

wire (flat type) 
(25 core)

MD mechanism deck
(MDM-7S2D)

tape mechanism deck

MD DIGITAL board

Please put MD mechanism deck on a rest with
an insulation sheet etc.

11

The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be
performed are shown as follows.

I+3V : For measuring Iop (Check the deterioration of the optical pick-up laser)
Iop

: For measuring Iop (Check the deterioration of the optical pick-up laser)

GND : Ground
TE

: TRK error signal (Traverse adjustment)

FE

: Focus error signal

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

I+3V

CN105

Iop

TE

VC

GND

FE

RF

I+3V
Iop

GND

TE
FE
VC
RF

I+3V
Iop
GND
TE
FE
VC
RF

1

7

for MDM-7S2D

12

The Iop value labeled on the optical pick-up can be stored in the non-volatile memory. By storing the value, it will eliminate the need to look
at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), store the Iop
value on the optical pick-up according to the following procedure.

Record Precedure:
1. Press the   ?/1

  

button to turn on the power. (HCD-SE9)

2. Press the [FUNCTION] button to select the “MD” function. (HCD-SE9)
3. While pressing the  

MD

 x  stick and the  [REC MODE]  button at the same time, press the  Z 

MD

  button.

4. Press the  

MD

 

>

  stick to display “[Service]”. Then press the [ENTER/START] button.

5. Press the  

MD

 

>

  stick to display “Iop Write” (C05) and press the [ENTER/START] button.

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

To select the number : Press the  

MD

 

.

 stick or the  

MD

 

>

  stick.

To select the digit

: Press the [TAPE REC] button.

8. When the [ENTER/START] button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
9. As the adjustment results are stored for the 8 value. Leave it as it is and press the [ENTER/START] button.
10. “Complete!” will be displayed momentarily. The value will be stored in the non-volatile memory and the display will become “Iop

Write” (C05).

11. Press the  Z 

TAPE

  button to exit the mode.

12. Press the  ?/1  button to turn off the power. (HCD-SE9)

Display Precedure:
1. Press the  ?/1  button to turn on the power. (HCD-SE9)
2. Press the [FUNCTION] button to select the “MD” function. (HCD-SE9)
3. While pressing the  

MD 

x  stick and the [REC MODE] button at the same time, press the  Z

 MD

  button.

4. Press the  

MD 

>

  stick to display “[Service]”. Then press the [ENTER/START] button.

5. Press the  

MD 

>

  stick to display “Iop Read” (C26) and press the [ENTER/START] button.

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

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

: indicates the Iop value after adjustment

7. To end, press the [MODE] button to display “Iop Read” (C26). Then press the  Z

 TAPE

  button.

8. Press the  ?/1  button to turn off the power. (HCD-SE9)

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “SECTION 6  ELECTRICAL ADJUSTMENTS”.

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.

• 0.93 mW power

Specified value : 0.84 to 0.92 mW (KMS-262A)

0.90 to 0.96 mW (KMS-262E)

• 8.65 mW power

Specified value : 8.1 to 8.7 mW (KMS-262A)

8.4 to 8.9 mW (KMS-262E)

• Iop (at 8.65 mW)

Labeled on the optical pick-up

Iop value ± 10mA

• Unsatisfactory if displayed as “NG : XXXX”

(XXXX are arbitrary numbers)

• Unsatisfactory if displayed as “T=@@ (##) [NG]”

(@@, ## are both arbitrary numbers)

Laser power check

(6-2 : See page 33)

Auto check

(6-4 : See page 34)
Temperature

compensation

offset check

(6-1 : See page 33)

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

• Check for disconnection of the circuits around

D101 (BD board)

• Check the signals around IC101, IC151, CN102,

CN103 (BD board)

Measure if unsatisfactory