Sony MZ-R90/R91 021R e s N, 021R e s O K ?, 021R e s e t, Section Electrical Adjustments, Ver

Ver 1.3 2001. 01

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. OUTLINE

•In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode. (See page 13)

However, before starting automatic adjustment, the memory clear, power adjustment and temperature adjustment must be performed in the manual mode.

•The keys in the description refer to the keys on both set and remote commander unless otherwise specified.

Though LCD display shows the LCD of the remote commander, same contents are also displayed on the LCD of the set.

5-2. PRECAUTIONS FOR ADJUSTMENT

1.Adjustment must be done in the test mode only. After adjusting, release the test mode.

2.Use the following tools and measuring instruments.

•	Test CD disc	TDYS-1
		(Part No. : 4-963-646-01)
•	SONY MO disc available on the market
•	Laser power meter	LPM-8001
		(Part No. : J-2501-046-A)

• Digital voltmeter

3.Unless specified otherwise, supply DC 3V from the DC IN 3V jack.

4.Switch position

HOLD switch ................ OFF

5-3. ADJUSTMENT SEQUENCE Adjustment must be done with the following steps.

1.	NV Reset (Memory clear)	
		
	r
		
2.	Power Supply Manual Adjustment 		Manual Mode
	r	
		
3.	Temperature correction	
	r	
4.	CD Overall Adjustment
		
	r		Overall Mode
5.	MO Overall Adjustment	
		

5-4. NV RESET

• Setting method of NV reset

1.Select the manual mode of test mode, and set mode num- ber 021NV Reset.

LCD display

021R e s N V

2.Press the X key.

LCD display

021R e s O K ?

3.Press the X key once more.

LCD display

021R e s * * *

rNV reset (after several seconds)

021R e s e t !

4.Quit the manual mode, and activate the test mode.

5-5. POWER SUPPLY MANUAL ADJUSTMENT

• Adjustment sequence

Adjustment must be done with the following steps.

1.VC PWM Duty (L) adjustment (mode number: 762) r

2.VREM PWM Duty (H) adjustment (mode number: 763) r

3.VREM PWM Duty (L) adjsutment (mode number: 764) r

4.VC PWM Duty (H) adjustment (mode number: 765)

r

5.VREM PWM Duty (H) adjustment (mode number: 766) r

6.VREM PWM Duty (L) adjustment (mode number: 767)

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