Read Sony DCR-TRV340 Service Manual online
5-29
DCR-TRV340
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.
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.
caused by static electricity.
Note 3:
Before performing the adjustments, check the data of page: 0,
address: 10 is “00”. If not, set data: 00 to this address.
address: 10 is “00”. If not, set data: 00 to this address.
Note 4:
Set the LCD BRIGHT (Menu display) to the center.
Set the LCD COLOR (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-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.
concentrated in CN5502 of the PD-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.
Table 5-1-15.
1. VCO Adjustment (PD-160 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
be blurred.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 8 of CN5502 (HSY)
Measuring Instrument
Frequency counter
Adjustment Page
C
Adjustment Address
61, 62
Specified Value
f = 15734 ± 30Hz
Note1:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
61
Change the data and set the VCO
frequency (f) to the specified
value.
frequency (f) to the specified
value.
3
C
61
Press PAUSE button.
4
C
61
Read the data, and this data is
named D
named D
61
.
5
Convert D
61
to decimal notation,
and obtain D
61
’. (Note2)
6
Calculate D
62
’ using following
equations (Decimal calculation)
When D
When D
61
’ 238
D
62
’ = D
61
’+ 17
When D
61
’ > 238
D
62
’ = 255
7
Convert D
62
’ to a hexadecimal
number, and obtain D
62
. (Note2)
8
C
62
D
62
Set the data, and press PAUSE
button.
button.
9
0
01
00
Set the data.
Note2:
Refer to “Table 5-4-1. Hexadecimal-decimal Conversion Table”.
10
9
1
2
CN5502
Pin No.
1
3
5
7
9
Signal Name
VB
VG
VR
XHD
GND
Pin No.
2
4
6
8
10
Signal Name
XVD OUT
PSIG
MAKER CHECK
XHD OUT
GND
PD-160 board
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