5-33
3-8.
LCD SYSTEM ADJUSTMENT
(GV-D900/D900E)
Note1:
The back light (fluorescent tube) is driven by a high voltage AC
power supply. Therefore, do not touch the back light holder to avoid
electrical shock.
Note2:
When replacing the LCD unit, be careful to prevent damages caused
by static electricity.
Note3:
Set the LCD BRIGHT (IO-64 board S103,104) to the center.
Note4:
Before perform the LCD system adjustment, check that the
specified value of “Base Band Block Adjustments” of “VIDEO
SYSTEM ADJUSTMENTS” is satisfied.
[Adjusting connector]
Most of the measuring points for adjusting the LCD display are
concentrated in the following connector.
CN9925 of the CB-61 board
Connect the Measuring Instruments via the CPC-10 jig (J-6082-
424-A).
The following table shows the Pin No. and signal name of the
connector.
[Video input signal for adjustments]
If stated as “10-step stair-step” in the signal column, input the 10-
step stair-step signal in the video input terminal as the video input
signal for the adjusting. Check that the input signal level is 1.00
Vp-p before adjusting.
Fig. 5-3-25. 10 steps star-steps
Pin No.
1
2
3
4
5
Signal name
VR
VG
VB
V COM
GND
Pin No.
6
7
8
9
Signal name
C SYNC
HDB
SRT
FRP
1. LCD Initial Data Input
Mode
VTR stop
Signal
Arbitrary
Adjustment Page
D
Adjustment Address
60 to 68, 6A to 6F
Adjusting method:
1)
Select page: 0, address:01, and set data: 01.
2)
Select page: D, and input the data in the following table.
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)
Select page: 0, address:01, and set data: 00.
Address
60
61
62
63
64
65
66
67
68
6A
6B
6C
6D
6E
6F
Data
NTSC
75
71
71
74
CA
8E
7F
7E
5E
50
50
7E
8E
32
44
PAL
96
76
76
7F
CA
86
7F
7E
6A
50
50
7A
6E
32
22
Remark
Hue adjustment
White balance adjustment
White balance adjustment
Contrast adjustment
PANEL –19V adjustment
V-COM adjustment
Fixed value
Fixed value
Horizontal position adjustment
Fixed value
Fixed value
Bright adjustment
Color adjustment
Fixed value
Fixed value
Approx.
0.714V
Approx.
0.286V
H sync
0 IRE
100 IRE
1.00V
Summary of Contents for GV-D300 Operating Instructions (primary manual)
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Page 30: ...2 3 2 4 CB 61 RJ 77 BOARDS 2 5 CONTROL SWITCH BLOCK FK 71 ...
Page 33: ...2 6E 2 12 CIRCUIT BOARDS LOCATION ...
Page 61: ...GV D300 D300E D900 D900E 4 85 4 86 4 87 AV IN OUT IO 62 4 88 ...
Page 62: ...GV D300 D300E D900 D900E 4 89 4 90 4 91 4 92 MULTI CONNECTOR EX 34 ...
Page 64: ...GV D300 D300E D900 D900E 4 96E CUSTOMER CONTROL CONTROL SW BLOCK FK 71 4 95 ...
Page 142: ...3 BLOCK DIAGRAMS PAGE 3 3 3 1 OVERALL BLOCK DIAGRAM 1 2 PAGE 3 8 3 3 POWER BLOCK DIAGRAM ...