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If any of the following parts was replaced, execute the “Flicker 
Adjustment” as mentioned below.
• 

Liquid crystal display panel (LCD1)

• 

Complete DISP board

Note: This adjustment can be operated even if it is remote commander 

which is not attached remote commander.

PC 
(The one with serial port. The USB-
RS232C conversion is available.)

Flicker adjustment

Communication software 
(Hyper Terminal etc.)

Serial cable for RS232C 
(Cross cable)

RS232-JIG OVERALL ASSY 
(Part No. A-1777-380-A)

RS232-JIG OVERALL ASSY

Please setting it as follows. 

1-3.  Connection with unit
Procedure:
1.  Remove cover referring to “3. DISASSEMBLY (Page 9 to 

24)”.

2.  Insert the 5pin cable into the connector of the MAIN board 

(CN501).

Note: Connect 5pin cable after removing the front panel block and DVD 

mechanism deck referring to “3. DISASSEMBLY (Page 9 to 24)”.

3.  The switch of RS232-JIG OVERALL ASSY is “L”.

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4.  The communication software is start up.
5.  Turn on the main power of unit.
 

The following log is displayed when starting while connected.

------ Test Mode 5 : HyperTerminal Start ------

Techwell Mode :
                Data Read Format for Current Page: ‘r 5AB1’+[Enter]
                Data Write Format for Current Page: ‘w C4D3 03’+[En-
ter]

DAC Mode:0-vcom1_bias/1-vcom2_bias/2-vcom1_p/3-vcom2_p
                Data Read Format : ‘drn’+ [Enter]
                Data Write Format: ‘dwn 7D’+ [Enter]

Back Light Mode :
                BCKL Read Format : ‘drb’+ [Enter]
                BCKL Write Format: ‘dwb 7D’+ [Enter]

Flash Write
                Save Data to Flash : ‘ds’+ [Enter]
                Clear Flash Data : ‘dc’+ [Enter]

To Enter Test Mode : ‘ti’
To Exit Test Mode  : ‘to’

To View Command ver: ‘svc’

 =========== LINK OK ===========

Note 1: Perform adjustment of NTSC/PAL separately.

Procedure:
1.  The setting of “1. SETTINGS” is completed.
2.  Input the NTSC or PAL white 40% raster signal from AUX2 

IN jack on the rear side of main unit.

3.  In the state of source off, press the [4] → [5] → [4] (keeps 

pressing) button on the remote commander.

 

The test mode 4 starts, and the “T4” is displayed on the moni-
tor.

 

4.  “dr0” is input by the communication software and “Enter” key 

is pressed.

 

The following numerical value returns from the set.

 

(Following characters/values are example)

  dr0
  VCom1_Bias : 

0x03E901A0

  Vcom1_p 

: 

0x03E901D6

  Vcom2_Bias : 

0x04B00210

  Vcom2_p 

: 

0x03E901D6

5.  To change the adjusted value, “dw0 ####” is input by the com-

munication software and “Enter” key is pressed.

 

The following numerical value returns from the set.

 

• NTSC adjustment

  dw0 

03E9####

  VCom1_Bias : 

0x03E9####

  Vcom1_p 

: 

0x03E901D6

  Vcom2_Bias : 

0x04B00210

  Vcom2_p 

: 

0x03E901D6

 

• PAL adjustment

  dw1 

04B0####

  VCom1_Bias : 

0x03E901A0

  Vcom1_p 

: 

0x03E901D6

  Vcom2_Bias : 

0x04B0####

  Vcom2_p 

: 

0x03E901D6

 

####: Hexadecimal (“0000” to “FFFF”)

 

Adjust so that the fl icker becomes minimum in the sight by ad-
justing 10 steps of hexadecimal values at a time up and down.

6.  “ds” is input by the communication software and “Enter” key 

is pressed and the numerical value is saved. 

2: Change is intelligible, when it changes into the home screen.

7.  The “Reset” button is pressed and turn the power off.

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If any of the following parts was replaced, perform the “IOP 
Check” as mentioned below.

•  Optical pick-up block (chassis (OP, ZA) complete assy)
•  Complete SERVO board

Precaution
Use the following tools and measuring devices.
• 

DVD test disc TDV-540C (Part No. J-2501-235-A)

• 

CD test disc PATD-012 (Part No. 4-225-203-01)

• Digital 

voltmeter

• 

Accessory remote commander RM-X271

Note: This adjustment can be operated even if it is remote commander 

which is not attached remote commander.

Procedure:
1.  Check the IOP value of DVD and CD by label on the optical 

pick-up.

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2.  Connect a digital voltmeter to TP51 (IOPDVD) and TP63 

(D3.3V) on the SERVO board.

3.  Playback the DVD test disc (TDV-540C), and make a note of 

the value of digital voltmeter.

4.  Divide the measured voltage value by 1, and convert it into 

current value.

5.  Check that the calculated value is within ±6 mA to the IOP 

value given on the label.

6.  Connect a digital voltmeter to TP47 (IOPCD) and TP63 

(D3.3V) on the SERVO board.

7.  Playback the CD test disc (PATD-012), and make a note of the 

value of digital voltmeter.

8.  Divide the measured voltage value by 1, and convert it into 

current value.

9.  Check that the calculated value is within ±6 mA to the IOP 

value given on the label.