3-6. Laser Power Check

Procedure:

1.In the test mode (Display Check mode), press the [VOL+] key to enter the Manual mode.

2.Open the lid and press the . key continuously until the optical pick-up moves to the most inward track.

3.Set the laser power meter so that the laser beam from the optical pick-up aims at the objective lens of laser power meter at right angle.

4.Press the [VOL--]key once to display as follows.

Display

9 DESIGN

5.Press the > key three times to select the item number 9111 and display as follows.

Display

111

###S**

6.Confirm that the value of laser power meter is 0.67 mW ± 21%.

7.Press the > key to select the item number 9112.

8.Confirm that the value of laser power meter is 0.76 mW ± 18%.

9.Press the > key to select the item number 9113.

10.Confirm that the value of laser power meter is 6.25 mW ± 12%.

11.Press the x key four times and back to the Display Check mode.

3-7. Setting The Adjustment Values

3-7-1. Hi-MD3 setting

Preparation:

1.Perform calculation every item based on the data given by the Hi-MD3 adjustment disc by referring to the following table. (Round off the value in decimal place)

2.Convert the calculated value into hexadecimal number.

Note: The Hi-MD3 adjustment parameters vary depending on the disc, and therefore use the parameters of the disc used when performing the adjustment.

Item No.

Calculating formula (*3)

 

 

0211

Pr_nominal / 0.05

 

 

(*1)

Por / 0.05

 

 

0212

Kr (100)

 

 

0213

Pw_nominal / 0.05

 

 

(*2)

Ppw / 0.05

 

 

0214

Kw (100)

 

 

0215

Prmin / 0.05

 

 

0216

Pwmin / 0.05

*1) If the “Pr_nominal” value is indicated, use the “Pr_nominal” value and not used “Por” value.

*2) If the “Pw_nominal” value is indicated, use the “Pw_nominal” value and not used “Ppw” value.

*3) Round off after the decimal point.

Table 3-7-1. Hi-MD3 adjustment parameter

MZ-NH700/NHF800

Ver 1.1

Example of Calculation:

Item No.

Parameter

 

Result

 

 

Decimal

Hexadecimal

 

 

 

 

 

 

 

 

0211

Pr_nominal

2.50 mW

50

32h

 

 

 

 

 

0212

Kr

0.3 %/°C

30

1Eh

 

 

 

 

 

0213

Pw_nominal

7.35 mW

147

93h

 

 

 

 

 

0214

Kw

0.4 %/°C

40

28h

 

 

 

 

 

0215

Prmin

1.9 mW

38

26h

 

 

 

 

 

0216

Pwmin

5.8 mW

116

74h

Procedure:

1.In the test mode (Display Check mode), press the [VOL+] key to enter the Manual mode.

2.Press the > key once, press the [VOL+] key once, and press the > key once again to display as follows.

Display

210 DiscPr

3.Press the > key once to select the item number 0211.

4.Adjust with [VOL+]/[VOL--]keys so that the adjustment value of LCD becomes calculated value.

5.Press the X key to write the adjusted value.

6.Press the > key to next item.

7.Repeat adjustment from step 4 until item number 0216.

3-7-2. Other setting

1.In the test mode (Display Check mode), press the [VOL+] key to enter the Manual mode.

2.Press the > key five time to select the item number 0113 and display as follows.

Display

113

###S**

adjustment value (hexadecimal)

3.Press the [VOL+]/[VOL--]key and set the according value to each model type and destination referring to the following table.

4.Press the X key to write the adjusted value.

Destination

Model Type

 

 

MZ-NH700

MZ-NHF800

 

 

 

 

US

50

 

 

 

Canadian, Australian

20

30

 

 

 

AEP, UK, East European

A0

B0

 

 

 

E18, Hong Kong, Korean,

25

34

Chinese, Tourist

 

 

 

 

 

E91, Mexican

20

 

 

 

Abbreviation

E18: 100V - 240V AC area in E model

E91: 220V AC area in E model

Table 3-7-2. Mode Type and Destination Setting

19

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Image 19
Sony NHF800 service manual 111 ###S, DiscPr, 113 ###S

NHF800 specifications

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