Sony DCR-TRV230 Service Manual page 160

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 (Menu display) to the center.
Set the LCD COLOR (Menu display) to the center.
Note 4: PD-138 board: DCR-TRV230/TRV330
PD-139 board: DCR-TRV530
[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 value 1.0kΩ
LCD type
2.5 LCD TYPE SH
(61k)
PD board
PD-138
DCR- TRV230/TRV330
[Adjusting Procedure]
DCR-TRV230/TRV330:
1. VCO adjustment
2. RGB AMP adjustment
3. Contrast adjustment
4. COM AMP adjustment
5. V-COM adjustment
6. White balance adjustment
DCR-TRV530:
1. VCO adjustment
2. RGB AMP adjustment
3. Black limit adjustment
4. Contrast adjustment
5. Center level adjustment
6. V-COM adjustment
7. White balance adjustment
5-29
47kΩ
3.5 LCD TYPE SO
(123k)
PD-139
TRV530
Table 5-1-12.