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

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