5-40
DCR-IP45/IP45E/IP55/IP55E
1-5.
LCD SYSTEM ADJUSTMENT
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:
Before performing the adjustments, check the data of page: 0,
address: 10 is “00”. If not, set data: 00 to this address.
Switch setting:
LCD BACK LIGHT .......................................................... ON
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN803 of the PD-166 board. Connect the Measuring
Instruments via the CPC-jig for LCD panel (J-6082-529-A).
The following table shows the Pin No. and signal name of CN803.
Table 5-1-15.
Pin No.
1
2
3
4
5
6
Signal Name
VG
COM
GND
HSY
NC
PSIG
1. VCO Adjustment (PD-166 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be unsable.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin
4
of CN803 (HSY)
Measuring Instrument
Frequency counter
Adjustment Page
C
Adjustment Address
85, 8F
Specified Value
f = 15734
±
30Hz (NTSC)
f = 15625
±
30Hz (PAL)
Note1:
NTSC: DCR-IP45/IP55
PAL: DCR-IP45E/IP55E
Note2:
Refer to “Table 5-4-1. Hexadecimal-decimal Conversion Table”.
Note3:
The data of page: 0, address: 10 must be “00”.
Adjusting method for NTSC model:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
85
Change the data and set the VCO
frequency (f) to the specified value.
3
C
85
Press PAUSE button.
4
C
85
Read the data, and this data is
named D
85
.
5
Convert D
85
to decimal notation,
and obtain D
85
’. (Note2)
6
Calculate D
8F
’ using following
equations (Decimal calculation)
When D
85
’ 238
D
8F
’= D
85
’+17
When D
85
’> 238
D
8F
’= 255
7
Convert D
8F
’ to a hexadecimal
number, and obtain D
8F
. (Note2)
8
C
8F
D
8F
Set the data, and press PAUSE
button.
9
0
01
00
Set the data.
Adjusting method for PAL model:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
8F
Change the data and set the VCO
frequency (f) to the specified value.
3
C
8F
Press PAUSE button.
4
C
8F
Read the data, and this data is
named D
8F
.
5
Convert D
8F
to decimal notation,
and obtain D
8F
’. (Note2)
6
Calculate D
85
’ using following
equations (Decimal calculation)
When D
8F
’ 17
D
85
’= D
8F
’–17
When D
8F
’< 17
D
85
’= 00
7
Convert D
85
’ to a hexadecimal
number, and obtain D
85
. (Note2)
8
C
85
D
85
Set the data, and press PAUSE
button.
9
0
01
00
Set the data.
Fig. 5-1-19.
1
6
CN803
PD-166 board
