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9

• In checking the MD mechanism deck section (MDM-7X2A), prepare two extension jigs (Part No. J-2501-100-A: 1.00 mm 27 core and

Part No. J-2501-198-A: 1.00 mm 17 core).

• In checking the CD mechanism deck section (CDM55A-21BD53), prepare extension jig (Part No. J-2501-075-A: 1.00 mm 21 core.)

Pin 2 (GND)

Pin 3 (OUTSW)

In performing the operation check with the CD mechanism deck section removed from the main unit, the CD disc loading will be disabled
if the connector cable between MD DIGITAL board (CN1005) and LOADING board (CN151) is disconnected. Accordingly, make
preparation through the following steps.
1. Insert the CD disc for test with the set assembled.
2. Unplug the AC power cord to turn the power off, and remove the CD mechanism deck section. (Disconnect the connector cable

between MD DIGITAL board (CN1005) and LOADING board (CN151), and also the connector cable between MD DIGITAL board
(CN1002) and BD (CD) board (CN101))

3. Connect the CN1005 pin 3 (OUTSW) and pin 2 (GND) on the MD DIGITAL board with a lead wire.
4. Connect the connectors between MD DIGITAL board (CN1002) and BD (CD) board (CN101) with the extension tool (part No.: J-

2501-075-A).

Under this condition, the CD can be played but the disc loading operation is disabled.

After checking, disconnect the lead wire connected in step 3.

10

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to

the customer.

Procedure:
1. Press the

I/1

button to turn the power on.

2. Press three buttons of

. m

, 

[REC MODE]

, and

x

(CD) simultaneously.

3. The set is reset, and displays “COLD RESET”, then becomes standby status.

Procedure:
1. Press the

I/1

button to turn the power on.

2. Press three buttons of

M >

, 

[REC MODE]

, and

N X

(MD) simultaneously.

3. Each buttons are pressed, it changes display as follows.

Button

Display

x

 (CD)

7[TESTMIN]

REC MODE

8[TESTMID]

x

 (MD)

9[TESTMAX]

4.

[VOLUME]

 knob is turned, it changes display as follows.

Turn Direction

Display

clockwise

VOLUME MIN

center

VOLUME 21

counterclockwise

VOLUME MAX

5. To release from this mode, press the

I/1

button to turn the power off and cold reset.

Procedure:
1. Press the

I/1

button to turn the power on.

2. Press three buttons of

M >

, 

[REC MODE]

, and 

[TUNER/BAND]

 simultaneously.

3. Enter the version display mode and display STR version.
4. Each time the

x

(MD) button is pressed, it changes display STR version 

→ 

CD version 

→ 

MD version 

→ 

STR version 

→ 

...

5. To release from this mode, press the

I/1

button to turn the power off.

Procedure:
1. Press the

I/1

button to turn the power on.

2. Press three buttons of

M >

, 

[REC MODE]

, and

N X

(CD) simultaneously.

3. Liquid crystal display and LEDs are all turned on.
4. Each time the

x

(MD) button is pressed, it changes display all turned on 

→ 

all turned off 

→ 

pattern 1 

→ 

pattern 2 

→ 

all turned on 

→ 

...

5. Each time the

x

(CD) button is pressed, it changes LED indication all turned on 

→ 

all turned off 

→

 “I/1” 

→ 

“

REC

”

 

→ 

“N”

 (CD)

→ 

“X” 

(CD)

 → 

“N”

 (MD)

 → 

“X”

 (MD)

 → 

all turned on 

→ 

...

6. To release from this mode, press the

I/1

button to turn the power off.

Procedure:
1. Press the

I/1

button to turn the power on.

2. Press three buttons of

. m

, 

[CD    ]

, and 

[MD    ]

 simultaneously.

3. Enter the key test mode and display “KEY00   VOL0”.
4. Each time a button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account.

“VOL” value increases like 0, 1, 2 ... if turn the 

[VOLUME]

 knob clockwise, or it decreases like 9, 8, 7 ... if turn the 

[VOLUME]

 knob

counterclockwise.

5. To release from this mode, press three buttons in the same manner as step 2 , or disconnect the power cord.

Z

Z

11

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.

GND : Ground
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)

TE

: Tracking error signal (Traverse adjustment)

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

FE

: Focus error signal

12

About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-S5EN/provided with unit: 1-476-086-21)
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 MD test mode is not entered properly.
In this case, press the

I/1

button to turn the power off, and retry to enter the MD test mode.

The IOP value labeled on the optical 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 optical pick-up or non-volatile memory (IC195 of BD (MD)
board), record the IOP value on the optical pick-up according to the following procedure.

Record Procedure:
1. Press the

I/1

button to turn the power on.

2. Press the 

[FUNCTION]

 button to set the MD function.

3. Press three buttons of

M >

, 

[PLAY MODE]

, and 

[MD    ]

 simultaneously to enter the MD test mode and display “[Check]”.

4. Press the

. m 

“R”

or

M > 

“R”

button to display “[Service]”.

5. Press the

ENTER/YES “R”

button to display “AUTO CHECK”, and press the

M > 

“R”

button to display “Iop Write”.

6. Press the

ENTER/YES “R”

button.

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

To select the number : Press the

. m 

“R”

or

M > 

“R”

button.

To select the digit

: Press the 

[REC MODE]

 button.

9. When the

ENTER/YES “R”

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

10. As the adjustment results are recorded for the step 9 value. Leave it as it is and press the

ENTER/YES “R”

button.

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

Write”.

12. Press the 

[REPEAT]

 button to complete. “Initialize” will be displayed and release the MD test mode.

Display Precedure:
1. Press the

I/1

button to turn the power on.

2. Press the 

[FUNCTION]

 button to set the MD function.

3. Press three buttons of

M >

, 

[PLAY MODE]

, and 

[MD    ]

 simultaneously to enter the MD test mode and display “Check”.

4. Press the

. m 

“R”

or

M > 

“R”

button to display “Service”.

5. Press the

ENTER/YES “R”

button to display “AUTO CHECK”, and press the

M > 

“R”

button to display “Iop Read”.

6. Press the

ENTER/YES “R”

button.

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

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

: Indicates the Iop value after adjustment.

8. Press the 

[REPEAT]

 button to complete. “Initialize” will be displayed and release the MD test mode.

If the nonvolatile memory data is abnormal, “E001 MEMORY NG” will be displayed so that the MD deck does not continue operations.
In this case, set the test mode promptly and perform the following procedure.

Procedure:
1. Enter the MD test mode (refer to page 32).
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be

displayed “INIT EEP?”.

3. Press the

x

(MD) and 

[MD    ]

 buttons simultaneously.

4. Press the

. m

 “R”

or

M >

 “R”

button to display “MDM-7X2A”.

5. Press the

ENTER/YES “R”

button. If the nonvolatile memory is successfully overwritten, the normal MD test mode will be set and a

message to select the MD test mode will be displayed.

Z

Z

Z