Sony DCR-TRV230E Service Manual page 170

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-TRV430E
PD-139 board: DCR-TRV230E/TRV235E/TRV325E/ TRV330E/
TRV530E
[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.
Pin No. Signal Name
1 VB
3 VG
5 VR
7 XHD
9 GND
Table 5-1-11.
10
9
PD-138/139 board
1 2
CN5502
Fig. 5-1-16.
Pin No. Signal Name
2 XVD OUT
4 PANEL COM/PSIG
6 MAKER CHECK
8 XHD OUT
10 GND
[ LCD Type Check ]
By measuring the resistor value between Pin 6 of CN5502 and
GND, the type of LCD can be discriminated.
Resistor 4.7kΩ
value
3.0 LCD
LCD type
TYPE SH
(123k)
PD board PD-138
DCR-
TRV430E
*1: Except AEP/UK model
*2: AEP/UK model
[ 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
5-29
22kΩ 33kΩ 47kΩ
2.5 LCD 2.5 LCD 3.5 LCD
TYPE SO TYPE SO TYPE SO
(61k) (123k) (123k)
PD-139 PD-139 PD-139
TRV230E(*1) TRV235E TRV530E
TRV330E(*1) TRV230E(*2)
TRV325E
TRV330E(*2)
Table 5-1-12.