Read Sony DCR-TRV738E / DCR-TRV740 / DCR-TRV740E / DCR-TRV840 Service Manual online
5-30
DCR-TRV738E/TRV740/TRV740E/TRV840
1-4.
ELECTRONIC VIEWFINDER SYSTEM
ADJUSTMENT
ADJUSTMENT
Note1:
When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
caused by static electricity.
Note2:
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.
Note3:
Switch setting:
LCD panel ........................................................................... Close
LCD panel ........................................................................... Close
Note4:
NTSC model: DCR-TRV740/TRV840
PAL model: DCR-TRV738E/TRV740E
PAL model: DCR-TRV738E/TRV740E
[Adjusting connector]
Most of the measuring points for adjusting the viewfinder system
are concentrated in CN1108 of VC-278 board.
Connect the Measuring Instruments via the CPC-13 jig (J-6082-
443-A).
The following table shows the Pin No. and signal name of CN1108.
are concentrated in CN1108 of VC-278 board.
Connect the Measuring Instruments via the CPC-13 jig (J-6082-
443-A).
The following table shows the Pin No. and signal name of CN1108.
Table 5-1-13.
1. VCO Adjustment (VC-278 board)
Set the VCO free-run frequency. If deviated, the EVF screen will
be blurred.
be blurred.
Mode
Camera
Subject
Arbitrary
Measurement Point
Pin qa of CN1108 (VCO)
Measuring Instrument
Frequency counter
Adjustment Page
C
Adjustment Address
51, 52
Specified Value
f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
f = 15625 ± 30Hz (PAL)
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
51
Change the data and set the VCO
frequency (f) to the specified
value.
frequency (f) to the specified
value.
3
C
51
Press PAUSE button.
4
C
51
Read the data, and this data is
named D
named D
51
.
5
Convert D
51
to decimal notation,
and obtain D
51
’. (Note1)
6
Calculate D
52
’ using following
equations (Decimal calculation)
[NTSC model]
When D
[NTSC model]
When D
51
’ 236
D
52
’ = D
51
’+19
When D
51
’ > 236
D
52
’ = 255
[PAL model]
When D
When D
51
’ 19
D
52
’ = D
51
’–19
When D
51
’ < 19
D
52
’ = 00
7
Convert D
52
’ to a hexadecimal
number, and obtain D
52
. (Note)
8
C
52
D
52
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”.
Pin No.
1
2
3
4
5
6
7
8
9
10
Signal Name
REG GND
N. C.
BPF MONI
N. C.
PB RF
REG GND
N. C.
RF SWP
N. C.
N. C.
Pin No.
11
12
13
14
15
16
17
18
19
20
Signal Name
VCO
EVF VG
RF SWP
N. C.
CAP FG
RF MON
N. C.
REG GND
REG GND
REG GND
Fig. 5-1-13.
CN1108
20
1
Remove the
CPC lid
CPC lid
