Sony R501PC service manual 21ResOK?, 21Reset, 32Pw-T W, 62V1dat

MZ-R501/R501PC

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 11).

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 12).

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.Mode Settings

9.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

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 12).

This set LCD display

8 32Pw-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

5-4. NV Reset

Caution: In this set, certain adjustment values are set in the manual mode at the factory. NV Reset will cause these data to be cleared. So, the adjustment values should be set again just after NV Reset is made.

8 32 SE4

: Address

E4: Adjusted value

3)Press the X key to write the adjusted value.

4)Select the manual mode of the test mode, and set item number 862 (see page 12).

This set LCD display

862V1dat

17