5-30
Pin No.
1
3
5
7
9
Signal Name
VB
VG
VR
XHD
GND
Pin No.
2
4
6
8
10
Signal Name
XVD OUT
PANEL COM/PSIG
MAKER CHECK
XHD OUT
GND
Fig. 5-1-15.
PD-138/139 board
CN5502
1
2
9
10
1-5.
LCD SYSTEM ADJUSTMENT
Note 1:
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.
Note 2:
When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
Note 3:
Set the LCD BRIGHT to the center.
Set the LCD COLOR (Menu display) to the center.
Note 4:
PD-138 board: DCR-TRV730
PD-139 board: DCR-TRV725E/TRV730E/TRV828/TRV828E/
TRV830/TRV830E
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN5502 of the PD-138/139 board. Connect the
measuring instruments via the multi CPC jig (J-6082-311-A). The
following table shows the Pin No. and signal name of CN5502.
Table 5-1-13.
[ LCD Type Check ]
By measuring the resistor value between Pin
6
of CN5502 and
GND, the type of LCD can be discriminated.
*1: Except AEP/UK model
*2: AEP/UK model
Table 5-1-14.
[Adjusting Procedure]
PD-138 board:
1.
VCO adjustment
2.
RGB AMP adjustment
3.
Contrast adjustment
4.
COM AMP adjustment
5.
V-COM adjustment
6.
White balance adjustment
PD-139 board:
1.
VCO adjustment
2.
PSIG gray adjustment
3.
RGB AMP adjustment
4.
Black limit adjustment
5.
Contrast adjustment
6.
Center level adjustment
7.
V-COM adjustment
8.
White balance adjustment
Resistor
value
LCD type
PD board
DCR-
1.0k
Ω
2.5 LCD
TYPE SH
(61k)
PD-138
TRV730
22k
Ω
2.5 LCD
TYPE SO
(61k)
PD-139
TRV730E(*1)
33k
Ω
2.5 LCD
TYPE SO
(123k)
PD-139
TRV725E
TRV730E(*2)
47k
Ω
3.5 LCD
TYPE SO
(123k)
PD-139
TRV828
TRV828E
TRV830
TRV830E
