5-4-3. Vl PWM Duty adjustment method

1.Set the Manual mode and set the item No. to 764. LCD display

764 VlPWM XX

2.Connect a digital voltmeter to TP917 (VL) on the main board and adjust + key (Voltage up) and – key (Voltage down) on the remote control.

Adjustment value:2.23V Standard value:2.22 to 2.235V

digital voltmeter

MAIN BOARD (SIDE A)

TP917

 

 

(VL)

 

C903

 

 

 

 

TP917

 

 

(VL)

 

 

D902

 

C901

L902

 

 

D901

 

 

MZ-E707

5-5. OVERALL ADJUSTMENT MODE

5-5-1. Overall adjustment mode structure

TEST MODE (Display Check Mode)

VOLUME – key

Overall Adjustment

 

 

Title Display(ASSY**)

 

 

. key

CD overall

x key

 

Adjustment

 

 

> N key

> N key

MO overall

x key

 

Adjustment

 

DISPLAY key

Electrical offset

x key

 

Adjustment key

 

PLAY MODE key

Power Supply

x key

 

Adjustment

 

3. Press X key to write the adjustment value.

5-4-4.Electrical offset adjustment method

Note: Doing adjustment by the state that a disc does not enter.

1.Confirm the power voltage is 1.5V.

2.Set to the test mode.

3.Press the – key activates the overall adjustment mode. LCD display

000 Assy11

4.Press the DISPLAY key. LCD display

030 Ofst**

5.If result of electrical offset adjustment is OK,the following dis- play appears.

LCD display

030 OfstOK

Note: The overall adjustments should be always performed in the sequence of CD t MO adjustments.

5-5-2. Overall CD and MO adjustment method

1. Set the TEST MODE and press – key to set the Overall Ad- justment mode.

LCD display

000 Assy11

2.Insert CD disc in the set, and press . key to set the Overall CD Adjustment mode.

Automatic adjustments are made.

LCD display

XXXCD RUN

XXX:Item No. for which an adjustment is being executed.

13

Page 13
Image 13
Sony MZ-E707 service manual VlPWM, Assy11, OfstOK