Sony MZ-N1 VchPWM, Adjustment sequence, Adjustment method of Vc PWM Duty L item number

digital voltmeter

MZ-N1

25)Select manual mode of the test mode, and set item number 874 (see page 14).

Remote commander LCD display

874 V6 dat **

**: Adjusted value

26)Adjust with the [VOLUME +] key (adjusted value up) or [VOL- UME --]key (adjusted value down) so that the adjusted value becomes 05.

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

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.Vc PWM Duty (H) adjustment (item number: 763) r

3.Vl PWM Duty (L) adjustment (item number: 764) r

4.Vl PWM Duty (H) adjustment (item number: 765) r

5.Vrec PWM Duty (L) adjustment (item number: 766) r

6.Vrec PWM Duty (H) adjustment (item number: 767) r

7.Vd PWM Duty adjustment (item number: 768)

• Setting method of power supply manual adjustment

1.Make sure that the power supply voltage is 3V.

2.Select the manual mode of the test mode (see page 14).

3.Set item number.

•Adjustment method of Vc PWM Duty (L) (item number: 762)

Remote commander LCD display

762 VclPWM **

**: Adjusted value

1.Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 2.40 +– 0.010.005 V.

digital voltmeter

MAIN board

AP914 (VC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

•Adjustment method of Vc PWM Duty (H) (item number: 763)

Remote commander LCD display

763 VchPWM **

**: Adjusted value

1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 2.75 ± 0.015 V.

MAIN board

AP914 (VC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

•Adjustment method of Vl PWM Duty (L) (item number: 764)

Remote commander LCD display

764 VLpwmL **

**: Adjusted value

1.Connect a digital voltmeter to the AP915 (VL) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 2.30+ 0.005 V.

–0.01

digital voltmeter

MAIN board

AP915 (VL)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

•Adjustment method of Vl PWM Duty (H) (item number: 765)

Remote commander LCD display

765 VLpwmH **

**: Adjusted value

1.Connect a digital voltmeter to the AP915 (VL) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 2.55 +– 0.010.005 V.

digital voltmeter

MAIN board

AP915 (VL)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

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