XAV-60, XAV-E60 - Sony Car Audio Service Manual (repair manual). Page 18

2.  V-COM  ADJUSTMENT
Procedure:
1.  The setting of “1. SETTINGS” is completed. 
2.  Connect an oscilloscope to TP1401 (VCOM) and TP1402 

(GND) on the LCD board.

3.  Adjust by using the communication software so that the 

waveform level of oscilloscope becomes 5.8 ± 0.1 V as fol-
lows. 

± 0.1Vp-p

4.  “dr1” is input by the communication software and “Enter” key 

is pressed.

 

The following numerical value returns from the set.

 

“Read Channel1:0x**”

 

**: Hexadecimal (“00” to “FF”)

5.  To change the adjusted value, “dw1 ##” is input by the com-

munication software and “Enter” key is pressed.

 

The following numerical value returns from the set.

 

“Write Channel1:0x##”

 

##: Hexadecimal (“00” to “FF”)

 

When waveform level is smaller than 5.8 V, the numerical 
value of “##” is increase.

 

When waveform level is larger than 5.8 V, the numerical value 
of “##” is decrease. 

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

is pressed and the numerical value is saved. 

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

Example:
When the returning numerical value “8a” and the waveform level 
is 5.6 V.
The numerical value is increased, and adjusted for a waveform lev-
el to become 5.8 ± 0.1 V with “8b→8c→8d→8e→8f→90→91...”.

dr1
Read Channel1:0x8a
dw1 8b
Write Channel1:0x8b
dw1 8c
Write Channel1:0x8c
dw1 8d
Write Channel1:0x8d
ds

←Reading of default value.
←Default value.
←The numerical value is in-
creased and confi rm.

←Enters the range of 
←The numerical value is saved.

3.  FLICKER  ADJUSTMENT
Procedure:
1.  The setting of “1. SETTINGS” is completed.  
2.  Input the PAL white 40% raster signal from AUX2 VIDEO IN 

jack on the VISUAL board. 

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 following screen is displayed on 
the monitor.

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

is pressed.

 

The following numerical value returns from the set.

 

“Read Channel0:0x**”

 

**: Hexadecimal (“00” to “FF”)

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.

 

“Write Channel0:0x##”

 

##: Hexadecimal (“00” to “FF”)

 

Adjust so that the fl icker becomes minimum in the sight.

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

is pressed and the numerical value is saved. 

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

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