Sony Digital Handycam DCR-PC100E, Service Manual

Page: 152 / 215

5-33
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 function settings of the touch panel as follow.
PANEL BRIGHT (Menu setting) ..................................... Center
PANEL COLOR (Menu setting) ....................................... Center
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN8201 of the PD-125 board.
The following table shows the Pin No. and signal name of CN8201.
Table 5-1-8
1. VCO Adjustment (PD-125 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode VTR stop
Signal No signal
Measurement Point Pin
5
of CN8201 (VCO CENT)
Measuring Instrument Oscilloscope (DC range)
Adjustment Page D
Adjustment Address 84
Specified Value A = 1.8 ± 0.1V
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Check the GND level of the oscilloscope.
3) Select page: D, address: 84, change the data and set the PCO
output voltage (A) to the specified value.
4) Press the PAUSE button.
5) Select page: 0, address: 01, and set data: 00.
H
A
GND level
(0Vdc)
Pin No.
1
2
3
4
5
Signal Name
VG
COM
GND
PSIG
VCO CENT
Fig. 5-1-18
CN8201
5 1
PD-125 board
Fig. 5-1-17