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8

I+3V
Iop
GND
TE
FE
VC
RF

I+3V

Iop

GND

TE
FE

VC

RF

1

7

for

MDM-7S2B

The special jig (J-2501-149-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.

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

9

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 optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record
the Iop value on the optical pick-up according to the following procedure.

Record Procedure:
1. Press the 

[             ]

 button and 

[         ]

 button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB

cable must be disconnected)

2. Connect the set to the PC with the attached USB cable.
3. Start up the software for test mode.
4. Click the 

[TEST MODE]

.

5. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “[Service]”, and click the 

[ENTER/YES]

.

6. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “Iop Write” (C05), and click the 

[ENTER/YES]

.

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 label.

To select the number : Click the 

[JOG UP]

 or 

[JOG DOWN]

.

To select the digit

: Click the 

[PUSH]

.

9. When the 

[ENTER/YES]

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

10. As the adjustment results are recorded for the 6 value. Leave it as it is and click the 

[PUSH]

.

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

Write (C05)”.

12. Quit the software for test mode after the 

[REPEAT]

 clicked.

When retrying this operation start from step1.

Display Procedure:
1. Press the 

[             ]

 button and 

[         ]

 button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB

cable must be disconnected)

2. Connect the set to the PC with the attached USB cable.
3. Start up the software for test mode.
4. Click the 

[TEST MODE]

.

5. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “[Service]”, and click the 

[ENTER/YES]

.

6. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “Iop Read” (C26), and click the 

[ENTER/YES]

.

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

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

: indicates the Iop value after adjustment

8. To end, click the 

[PUSH]

 and 

[MENU/NO]

 to display “Iop Read” (C26).

9. Quit the software for test mode after the 

[REPEAT]

 clicked.

When retrying this operation start from step1.

The test mode and recording of this set are controlled by a personal computer, thus requiring the set to be connected to the PC.
Prepare the personal computer in which necessary software is already installed.
• Attached software “OpenMG Jukebox” (necessary for recording (check in, check out)) (Part No. : 4-237-880-01)
• Software for test mode “TestMode_S.exe”  (“TestMode_S.exe” and essential files “data_files.csv”,  “Net MDUSB.dil” are distributed to-

gether with the Service Manual. For the test mode, copy these three files in the same folder beforehand)

In the operation in the test mode, the operational description requiring “click 

[xxx]

” means that you have to click the button on the screen.

(“xxx” indicates the button name)

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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”.

This set uses optical pick-up KMS-262E in the production, but for the repair, only the KMS-262A is supplied. As a result, two types of optical
pick-ups are used for this set, and the specified values for the check and adjustment of the laser power vary depending on the type.Details of the
identify of KMS-262A/KMS-262E are described in “5-4. How to Identify Optical Pick-up KMS-262A/KMS-262E”. (See Page 26)

 Optical pick-up of repair parts changed to KMS-262E.

• 0.90 mW power

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

0.90 to 0.96 mW (KMS-262E)

• 8.40 mW power

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

8.4 to 8.9 mW (KMS-262E)

• Iop (at 8.4mW)

Labeled on the optical pick-up
Iop value 

±

 10mA

• Unsatisfactory if displayed as “NG: XXXX”

NG
(XXXX is arbitrary number)

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

NG
(@@, ## are both arbitrary numbers)

Laser power check
(5-7-2 : See page 28)

Auto check
(5-7-4 : See page 29)

Temperature
compensation
offset check
(5-7-1 : See page 28)

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, IC201, CN102,

CN103 (BD 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

Procedure:
1. Press the 

[             ]

 button and 

[         ]

 button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB

cable must be disconnected)

2. Connect the set to the PC with the attached USB cable.
3. Start up the software for test mode.
4. Click the 

[TEST MODE]

.

5. Enter the test mode, then click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “<INFORMATION> ”, and click the 

[ENTER/YES]

.

6. “NT1-V

**.****” is displayed. In the event of different display, click the 

[ENTER/YES]

 until it is displayed.

“

**.****” indicates the microcomputer version.

Procedure:
1. Press the 

[             ]

 button and 

[         ]

 button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB

cable must be disconnected)

2. Connect the set to the PC with the attached USB cable.
3. Start up the software for test mode.
4. Click the 

[TEST MODE]

.

5. Quit the software for test mode after the 

[REPEAT]

 clicked.

When retrying this operation, start from step 1.

•

IBM PC/AT or Compatible (The software does not run on Macintosh.)
– CPU: MMX˛ Pentium® 233 MHz or higher (Pentium® II 400 MHz or higher is recommended)
– Hard disk drive space: 60 MB or more (The amount of necessary space depends on the version of the Windows OS or the size of

your audio files.)

– RAM: 64 MB or more
– CD-ROM drive (capable of software installation and playback of an audio CD)
– Sound Board
– USB port (supports USB 2.0 Full Speed. (previously USB 1.1))

•

Operating System: Windows® 98/Windows® 98 Second Edition/Windows® 2000 Professional/Windows® Me/Windows® XP Home
Edition/Windows® XP Professional (manufacturer installed)
The following environments are not supported.
– Windows® 95, Windows® NT, or other versions of Windows® NT (such as Server)
– An environment that is an upgrade of the original manufacturer-installed operating system, as in the following examples:

Windows® 3.1/Windows® 95 t Windows® 98 (or Windows® 98 Second Edition/Windows® Me)
Windows® Me/Windows® 2000 Professional t Windows® XP

– Multi-boot environment with Windows® 2000 (or Windows® XP) and Windows® 98 (or Windows® 98 Second Edition/Win-

dows® Me)

•

Display: High (16 bit) Color or more (800 

×

 480 dot or more)

•

Internet access: for Web registration and EMD services

•

Windows Media Player (Version 6.4 or higher) installed for playing MP3 files.

•

Windows Media Player (Version 7.0 or higher) installed for playing WMA files.

•

We do not assure the operation of MusicClip on the computer other than VAIO series computer.

•

We do not assure trouble-free operation for all computers satisfying the system requirements.

•

Trouble-free operation is not guaranteed following the self-conducted upgrade of home-built PCs oroperating systems.

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