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10

The disc tray lock function for the antitheft of a demonstration disc in the store is equipped.
Procedure:
1.

Press the  ?/1  button to turn the set on.

2.

Select the function “CD”.

3.

A disc is put in and a tray is closed.

4.

Press two buttons of  x  and  Z  (CD) simultaneously for five seconds.

5.

The message “LOCKED” is displayed and the tray is locked. (Even if turning power on/off, the tray is still locked.)

6.

Press two buttons of  x  and  Z  (CD) simultaneously for five seconds again.

7.

The message “UNLOCKED” is displayed and the tray is unlocked.

About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SM100EW/provided with unit)  buttons. These
operations are indicated as “R” in this manual.
Example:  MENU/NO “R”  ...Press the  MENU/NO  button of the remote commander.

Incorrect operations may be performed if the test mode is not entered properly.
In this case, press the  ?/1  button to turn the power off, and retry to enter the test mode.

If the disc tray does not open and the message “LOCKED” appears, press the two buttons of  

x

  and  Z  (CD)  at the same for

5 seconds or longer.
Then the lock is released, the message “UNLOCKED” appears for 2 seconds and the disc tray opens.

MAIN BOARD

TC BOARD

cassette mechanism deck
(CMAL1Z-236A)

11

MAIN BOARD

DIGITAL BOARD

MD mechanism deck section
(MDM-7S2D)

CD mechanism deck section
(CDM55A-30BBD61B)

MAIN BOARD

POWER BOARD

jig (6P) (J-2501-229-A)

AMP BOARD

REG BOARD

12

The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) 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

13

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 (MD) 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.

2. Press the  FUNCTION  button to select the “MD” function.
3. While pressing the  x  button and the  REC MODE  button at the same time, press the  Z  (MD) button.
4. Press the  

>

 “R”  button to display “[Service]”. Then press the  ENTER/YES “R”  button.

5. Press the  

>

 “R”  button to display “Iop Write” (C05) and press the  ENTER/YES “R”  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  

.

 “R”  button or the  

>

 “R”  button.

To select the digit

: Press the  TIMER SET “R”  button.

8. When the  ENTER/YES “R”  button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
9. As the adjustment results are stored for the 6 value. Leave it as it is and press the  ENTER/YES “R”  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  REPEAT “R”  button to exit the mode.
12. Press the  ?/1  button to turn off the power.

Display Precedure:
1. Press the  ?/1  button to turn on the power.
2. Press the  FUNCTION  button to select the “MD” function.
3. While pressing the  x  button and the  REC MODE  button at the same time, press the  Z  (MD) button.
4. Press the  

>

 “R”  button to display “[Service]”. Then press the  ENTER/YES “R”  button.

5. Press the  

>

 “R”  button to display “Iop Read” (C26) and press the  ENTER/YES “R”  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  MENU/NO “R”  button to display “Iop Read” (C26). Then press the  REPEAT “R”  button.
8. Press the  ?/1  button to turn off the power.

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 5  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 39)

Auto check

(6-4 : See page 40)
Temperature

compensation

offset check

(6-1 : See page 39)

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 (MD) board)

• Check the signals around IC101, IC151, CN102,

CN103 (BD (MD) board)

Measure if unsatisfactory