Lcd System Adjustment; Vco Adjustment (Pd-102 Board) - Sony Handycam DCR-PC1 Service Manual

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: Adjust the LCD BRIGHT button to its center of adjustment range.
Note 4: Set the LCD COLOR to its center of adjustment range from the
menu display.
[Adjusting connector]
Most of the measuring points for adjusting the LCD display are
concentrated in CN8201 of the PD-102 board.
The following table shows the pin numbers and signal name of
CN8201.
Pin No. Signal Name
1 VG
2 COM
3 GND
4 PSIG
5 VCO CENT

1. VCO Adjustment (PD-102 board)

Set the VCO free-run frequency. If deviated, the LCD display will
be blurred.
Mode
Signal
Measuring Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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 of the adjustment remote commander.
5) Select page: 00, address: 01, and set data: 00.
H
5-21
VTR stop
No signal
Pin 5 of CN8201 (VCO CENT)
Oscilloscope (DC range )
D
84
A=1.80 ± 0.10V
A
GND level
(0Vdc)
Fig. 5-1-15