Color Electronic Viewfinder System; Adjustment; Vco Adjustment (Va-117 Board) - Sony DCR-TRV16 Service Manual

DCR-TRV16/TRV16E/TRV18/TRV18E/TRV116E/TRV118E
1-4. COLOR ELECTRONIC VIEWFINDER
SYSTEM ADJUSTMENT
Note1: When replacing the LCD unit, be careful to prevent damages
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.
Note3: As the PANEL CLOSE switch is attached to the cabinet (R), this
cabinet must be attached when performing adjustments.
If you perform the adjustments with cabinet (R) removed, set the
following data.
1) Select page: 3, address: C4, and set data: 67.
2) Select page: 3, address: C5, and set data: 01.
Reset the data after completing adjustment.
1) Select page: 3, address: C4, and set data: 00.
2) Select page: 3, address: C5, and set data: 00.
Note4: NTSC model: DCR-TRV16/TRV18
PAL model: DCR-TRV16E/TRV18E/TRV116E/TRV118E
[Adjusting connector]
Most of the measuring points for adjusting the viewfinder system
are concentrated in CN1002 of VC-280 board.
Connect the Measuring Instruments via the CPC-8 jig (J-6082-388-A).
The following table shows the Pin No. and signal name of CN1002.
Pin No. Signal Name
1 N.C.
3 N.C.
5 EVF VCO
7 PANEL VG
9 H START
11 PANEL COM
13 N.C.
15 N.C.
17 SWP
19 GND
Table 5-1-12.
CN1002
2
1
20
19
Pin No. Signal Name
2 N.C.
4 EVF VG
6 GND
8 PD VCO
10 XHD/PSIG
12 TMS (MAKER CHECK)
14 N.C.
16 GND
18 RF IN/LANC JACK IN
20 RF MON
Removed the
CPC lid.
fig. 5-1-15.

1. VCO Adjustment (VA-117 board)

Set the VCO free-run frequency. If deviated, the EVF screen will be
blurred.
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 51
3 C 51
4 C 51
5
6
7
8 C 52
9 0 01
Note2: Refer to "Table 5-4-1. Hexadecimal-decimal Conversion Table".
5-30
Camera
Arbitrary
Pin 5 of CN1002 of VC-280 board
(EVF VCO)
Frequency counter
C
51, 52
f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
Procedure
01 Set the data.
Change the data and set the VCO
frequency (f) to the specified value.
Press PAUSE button.
Read the data, and this data is
named D .
51
Convert D to decimal notation,
51
and obtain D '. (Note2)
51
Calculate D ' using following
52
equations (Decimal calculation)
[NTSC model]
When D ' 231
51
D ' = D '+24
52 51
When D ' > 231
51
D ' = 255
52
[PAL model]
When D ' 24
51
D ' = D ' – 24
52 51
When D ' < 24
51
D ' = 0
52
Convert D ' to a hexadecimal
52
number, and obtain D . (Note2)
52
D Set the data, and press PAUSE
52
button.
00 Set the data.