Sony MZ-E800 service manual 021 Res, Reset, ResOK?, Power CC, Section Electrical Adjustments

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 Overall Mode

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NV Reset

Caution: On the set having the microcomputer version 1.000, the NV reset failure will occur.

Therefore, in executing the NV reset during electrical adjustment, follow the troubleshooting method of NV reset to perform the NV reset.

• Setting method of NV reset

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

Remote commander LCD display

021 ResNV CC

4. CD Overall Adjustment r

5. MO Overall Adjustment

r

3. Charging Manual Adjustment

r

2. Power Supply Manual Adjustment

1. NV Reset (Memory clear) r

Adjustment must be done with the following steps.

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 Manual Mode

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Adjustment Sequence

SECTION 5

ELECTRICAL ADJUSTMENTS

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 and power supply/charging adjustments must be performed in the manual mode.

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

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)
•	Recorded MO disc	PTDM-1
		(Part No. : J-2501-054-A)

Available SONY MO disc (recorded)

• Digital voltmeter

3.Unless specified otherwise, supply DC 1.5V from the battery terminal.

4.Switch position

AVLS switch	NORM
DIGITAL SOUND PRESET switch	OFF
HOLD switch	OFF

3.Press the X key once more.

Remote commander LCD display

021Res***

NV reset (after several seconds)

021Reset!

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

• Troubleshooting method of NV reset

Executing the NV reset on the set having the microcomputer version 1.000 causes the adjusted values of item numbers 721, 722, and 757 to be cleared.

In executing the NV reset on the set having the microcomputer version 1.000, follow the steps given below.

This operation is not necessary for the set having the microcomputer version 1.100 or later.

1.Select the manual mode of the test mode (see page 13).

2.Set item number 757 and record the adjusted value.

3.Set item number 721 and record the adjusted value.

4.Set item number 722 and record the adjusted value.

5.Execute the NV reset.

6.Set item number 757, and change the value to the adjusted value recorded previously with [VOL +] key or [VOL --]key, and then press the X key.

7.Set item number 721, and change the value to the adjusted value recorded previously with [VOL +] key or [VOL --]key, and then press the X key.

8.Set item number 722, and change the value to the adjusted value recorded previously with [VOL +] key or [VOL --]key, and then press the X key.

2. Press the X key.

Remote Commander LCD display

021ResOK?

Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

1.Vc PWM Duty (L) adjustment (item number: 762) r

2.Vrem PWM Duty (L) adjsutment (item number: 764) r

3.Vc PWM Duty (H) adjustment (item number: 765)

r

4. Vrem PWM Duty (H) adjustment (item number: 766)

• Setting method of power supply manual adjustment

1.Select the manual mode of the test mode, and set item number 036 (see page 13).

Remote commander LCD display

036 Power CC

2.Press the X key.

(The item number changes to 762 when X key is pressed)

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