DCR-PC4E, DCR-PC5, DCR-PC5E (serv.man2) - Sony Movie Service Manual (repair manual). Page 125

Read Sony DCR-PC4E / DCR-PC5 / DCR-PC5E (serv.man2) Service Manual online

5-31
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.
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN2105 of the PD-126 board. The following table
shows the Pin No. and signal name of CN2105.
1. VCO Adjustment (PD-126 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 CN2105 (HSY)
Measuring Instrument
Frequency counter
Adjustment Page
D
Adjustment Address
A2, A3
Specified Value
f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
Note1:
NTSC: DCR-PC5
PAL: DCR-PC4E/PC5E
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
D
A2
Change the data and set the
VCO frequency (f) to the
specified value.
3
D
A2
Press PAUSE button.
4
D
A2
Read the data, and this data is
named D
A2
.
5
Convert D
A2
 to decimal notation,
and obtain D
A2
'. (Note2)
6
Calculate D
A3
' using following
equations (Decimal calculation)
NTSC model:
  When D
A2
'   221
D
A3
' = D
A2
' + 34
  When D
A2
' > 221
D
A3
' = 255
PAL model:
  When D
A2
'   34
D
A3
' = D
A2
' – 34
  When D
A2
' < 34
D
A3
' = 00
7
Convert D
A3
' to a hexadecimal
number, and obtain D
A3
. (Note2)
8
D
A3
D
A3
Set the data, and press PAUSE
button.
9
0
01
00
Set the data.
Note2:
Refer to “Table 5-4-1. Hexadecimal-decimal Conversion Table”.
Table 5-1-12.
Pin No.
1
2
3
4
5
Signal Name
VG
COM
GND
PSIG
HSY
PD-126 board
CN2105
1
5
Fig. 5-1-17.

Display

Click on the first or last page to see other DCR-PC4E / DCR-PC5 / DCR-PC5E (serv.man2) service manuals if exist.

Random: