Sony GV-D300 Operating Instructions (primary manual), Service Manual

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10. V-COM Adjustment (CB-61 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous horizontal lines.
Mode Playback pause
Signal Alignment tape:
For system operation check
monoscope section
(XH5-5 (NTSC))
(XH5-5P (PAL))
Measurement Point Check on LCD display
Measuring Instrument
Adjustment Page D
Adjustment Address 65
Note1: Perform “Bright Adjustment” and “Contrast Adjustment” before
this adjustment.
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 65, change the data so that the
horizontal lines of the gray sections are not conspicuous.
3) Press the PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.
11. White Balance Adjustment (CB-61 board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
Mode VTR stop
Signal 10-step stair-step signal or color bar
signal whose chroma and burst signals
are turned off
Measurement Point Check on LCD display
Measuring Instrument
Adjustment Page D
Adjustment Address 61, 62
Specified Value The LCD screen should not be
colored.
Note1: Check the white balance only when replacing the following parts.
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC801
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 61 and 62, and set the data to the initial
value.
Note: To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
3) Check that the LCD screen is not colored. If colored, change
the data of page: D, address: 61 and 62 so that the LCD screen
is not colored.
Note:
To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
4) Select page: 0, address: 01, and set data: 00.
Address
Data
61
70
62
6F