Sony MZ-E800 service manual 762 Vc1PWM, 764 Vr1Vc1, VchPWM, VrhVch, Adj Ok, Chg-dV

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

Remote commander LCD display

762 Vc1PWM **

**: Adjusted value

1.Connect a digital voltmeter to the TP918 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.305+0.06–0V.

digital voltmeter

MAIN board

TP918 (VC)

TP904 (SET GND)

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

(The item number changes to 764 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 19)

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

Remote commander LCD display

764 Vr1Vc1 **

**: Adjusted value

1.Connect a digital voltmeter to the TP919 (VR) on the MAIN

board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.24+0.03–0V.

digital voltmeter

MAIN board

TP919 (VR)

TP904 (SET GND)

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

(The item number changes to 765 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 19)

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

Remote commander LCD display

765 VchPWM **

**: Adjusted value

1.Connect a digital voltmeter to the TP918 (VC) on the MAIN

board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.715+0.075–0V.

digital voltmeter

MAIN board

TP918 (VC)

TP904(SET GND)

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

(The item number changes to 766 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 19)

•Adjustment method of Vrem PWM Duty (H) (item number: 766)

Remote commander LCD display

766 VrhVch **

**: Adjusted value

1.Connect a digital voltmeter to the TP919 (VR) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.6+0.02–0.01V.

digital voltmeter

MAIN board

TP919 (VR)

TP904 (SET GND)

2.When press the X key to write the adjusted value, LCD displays as follows and power supply manual adjustment has completed.

Remote commander LCD display

036 ADJ OK

Adjustment and Connection Location: MAIN board (see page 19)

Charging Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following order.

1.Charging detection set value adjustment (item number 757) r

2.Normal charging current adjustment (item number 721)

r

3. Trickle charging current adjustment (item number 722)

•Adjustment method of charging detection set value (item number 757)

1.Connect a resistor 2.4 Ω between TP901 (BATT+) and TP902 (BATT-) on the MAIN board.

2.Apply 2 V across TP901 (BATT+) and TP904 (SET GND), and across TP903 (2V IN) and TP904 (SET GND) on the MAIN board respectively.

3.Select the manual mode of the test mode, and set item number 757 (see page 13).

Remote commander LCD display

757 Chg-dV **

**: Adjusted value

4.Adjust with [VOL +] key or [VOL --]key so that the adjusted value becomes 1.

If the adjusted value is already attained, go to the next adjustment item without pressing the X key.

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

Adjustment and Connection Location: MAIN board (see page 19)

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