Sony MZ-R500/R500PC SECTION ELECTRICAL ADJUSTMENTS, 0 21 ResNV, Outline, Adjustment Sequence

MZ-R500/R500PC

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 12).

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

•A key having no particular description in the text, indicates a set key.

•For the LCD display, the LCD display on the set is shown.

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

•Digital voltmeter

• Laser power meter LPM-8001

(Part No. : J-2501-046-A)

• Thermometer (using the Temperature Correction)

3.Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J601).

4.Switch position

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

• Setting method of NV reset

1.Select the manual mode of the test mode, and set item number 021NV Reset (see page 13).

This set LCD display

0 21 ResNV

2. Press the X key.

This set LCD display

021ResOK?

3.Press the X key once more.

This set LCD display

021Res

NV reset(after several seconds)

5-3. Adjustment Sequence

1.NV Reset(Memory clear)

2.Power Supply Manual Adjustment

3.Temperature Correction(item number:014)

4.Laser Power Check

5.Electrical offset Adjustment

Caution: This adjustment must be made with no disc loaded.

6.CD Overall Adjustment

7.MO Overall Adjustment

8.RESUME Clear

Manual Mode

Overall Mode

Manual Mode

Overall Mode

Manual Mode

021Reset!

4.Press the x key to quit the manual mode, and activate the test mode (display check mode).

• Change of Adjusted Values

On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, modify the adjusted values through the following procedure immediately after the NV was reset.

1.Item numbers in which the adjusted values are to be modified Item number 832

Item number 862 Item number 871 Item number 872

2.Adjusted values modifying procedure

1) Select the manual mode of the test mode, and set item number

832 (see page 13).

5-4. NV Reset

Caution: On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the micro- computer version 1.000, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset.

This set LCD display

832Pw-T W

2)Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes E4.

This set LCD display

832SE4

:Address

E4: Adjusted value

18