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DCR-HC17E/HC19E/HC21/HC21E/HC22E/HC32/HC32E/HC33/HC33E
4.
V-COM Adjustment (PD-236/237 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Check on LCD screen
Measuring Instrument
Adjustment Page
C
Adjustment Address
52
Specified Value
The brightness difference between
the section-A and section-B is
minimum
the section-A and section-B is
minimum
Note 1:
Perform “LCD Automatic Adjustment” before this ad-
justment.
justment.
Note 2:
Check that the data of page: 0, address: 10 is “00”.
Switch setting:
LCD BACKLIGHT .................................................................. ON
LCD BACKLIGHT .................................................................. ON
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
C
61
CD
Press PAUSE button.
3
C
52
Change the data so that
brightness of the section A
and section B is equal.
brightness of the section A
and section B is equal.
4
C
52
Subtract 5 from the data.
5
C
52
Press PAUSE button.
6
C
61
C5
Press PAUSE button.
7
0
01
00
3.
LCD Automatic Adjustment (PD-236/237 board)
This adjustment does the following items automatically.
VCO Adjustment
Contrast Adjustment
VCO Adjustment
Contrast Adjustment
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Adjustment Page
C
Adjustment Address
50, 51 (VCO Adjustment)
58 (Contrast Adjustment)
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
C
70
00
Press PAUSE button.
3
3
01
5A
Press PAUSE button. (Note 2)
4
3
02
Check the data changes to “00”.
5
3
03
Check the data is “00”. (Note 3)
6
C
50
Read the data and this data is
named D
named D
50
.
7
Convert D
50
to decimal
notation, and obtain D
50
’.
(Note 4)
8
Calculate D
51
’ using
following equations.
(decimal calculation)
AUO TYPE:
D
(decimal calculation)
AUO TYPE:
D
51
’ = D
50
’ + 23 (NTSC model)
SONY TYPE:
D
D
51
’ = D
50
’ + 10 (NTSC model)
D
51
’ = D
50
’ – 10 (PAL model)
9
Convert D
51
’ to a hexadeci-
mal number, and obtain D
51
.
(Note 4)
10
C
51
D
51
Press PAUSE button.
11
C
70
41
Press PAUSE button.
12
0
01
00
Note 2:
The adjustment data will be automatically input to page:
C, address: 50 and 58.
C, address: 50 and 58.
Note 3:
If the data change to “01”, adjustment has error. Contents
of error is written into page: 3, address: C6. See the
following table.
of error is written into page: 3, address: C6. See the
following table.
Note 4:
Refer to table 6-4-1. “Hexadecimal-decimal conversion
table”.
table”.
Data of page: 3, address: C6 Contents of error
58
VCO adjustment error
60
Contrast adjustment error
A
A
A
A
B
B
B
B
Fig. 6-1-18
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