Sony DCR-TRV738E Service Manual page 98

DCR-TRV738E/TRV740/TRV740E/TRV840
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.
Note4: Set the LCD BRIGHT (Menu display) to the center.
Set the LCD COLOR (Menu display) to the center.
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN5502 of the PD-156/160 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.
PD-156 board
Pin No. Signal Name
1 VB
3 VG
5 VR
7 C-SYNC/XHD
9 GND
Table 5-1-14.
PD-160 board
Pin No. Signal Name
1 VB
3 VG
5 VR
7 XHD
9 GND
Table 5-1-15.
PD-156/160 board
CN5502
10
9
2
1
Pin No. Signal Name
2 XVD OUT
4 PANEL COM
6 PANEL ID
8 XHD OUT
10 GND
Pin No. Signal Name
2 XVD OUT
4 PSIG
6 MAKER CHECK
8 XHD OUT
10 GND
1-5-1. LCD Type Check
By measuring the resistor value between Pin 6 of CN5502 and
GND, the type of LCD can be discriminated.
Resistor LCD type
value
2.2kΩ 2.5 LCD TYPE SH (123k)
6.8kΩ 3.5 LCD TYPE CA (123k)
22kΩ 2.5 LCD TYPE SO (61k)
47kΩ 3.5 LCD TYPE SO (123k)
*1: AEP/EE/NE/RU model
*2: E/AUS/HK/CH/JE model
When the type of LCD is "LCD TYPE CA" or "LCD TYPE SH",
perform "1-5-2. LCD SYSTEM ADJUSTMENT (PD-156 board)"
When the type of LCD is "LCD TYPE SO", perform "1-5-3. LCD
SYSTEM ADJUSTMENT (PD-160 board)"
• Abbreviation
HK : Hong Kong model
AUS : Australian model
CH : Chinese model
JE : Tourist model
EE : East European model
NE : North European model
RU : Russian model
5-32
PD DCR-
board
PD-156 TRV738E
TRV740E *1
PD-156 TRV840
PD-160 TRV740
TRV740E *2
PD-160 TRV840