Color Electronic Viewfinder System; Adjustment; Vco Adjustment (Vc-245 Board) - Sony DCR-PC4E Service Manual

1-4. COLOR ELECTRONIC VIEWFINDER
SYSTEM ADJUSTMENT
Note1: When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
Note2: Set the switches as follows.
Viewfinder ................................... ON (Viewfinder is Pulled out.)
Note3: Perform the following data setting before the viewfinder system
adjustments.
1) Select page: 2, address: 0E, and set data: 67.
2) Select page: 2, address: 0F, and set data: 01.
Reset the data after completing adjustment.
1) Select page: 2, address: 0E, and set data: 00.
2) Select page: 2, address: 0F, and set data: 00.
[Adjusting connector]
Most of the measuring points for adjusting the viewfinder system
are concentrated in CN004 of the VC-245 board.
Connect the Measuring Instruments via the CPC-6 flexible jig (J-
6082-370-B) and CPC-6 terminal board jig (J-6082-371-A).
The following table shows the Pin No. and signal name of CN004.
Pin No. Signal Name
1 LANC SIG
3
5 EVF VCO
7
9
11
13 TCK
15 TDO
17 SWP
19 GND
Table 5-1-11.
CN004
2 1
20 19
Remove the CPC lid
Screw (M1.7 × 2.5)
Fig. 5-1-14.
Pin No. Signal Name
2
4 EVF VG
6 GND
8
10
12 TMS
14 TDI
16 GND
18 RF IN/LANC JACK IN
20 RF MON

1. VCO Adjustment (VC-245 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: NTSC: DCR-PC5
PAL: DCR-PC4E/PC5E
Adjusting method:
Order Page Address Data
1 0 01
2 D 92
3 D 92
4 D 92
5
6
7
8 D 93
9 0 01
Note2: Refer to "Table 5-4-1. Hexadecimal-decimal Conversion Table".
5-28
Camera
Arbitrary
Pin 5 of CN004 (EVF VCO)
Frequency counter
D
92, 93
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 .
92
Convert D to decimal notation,
92
and obtain D '. (Note2)
92
Calculate D ' using following
93
equations (Decimal calculation)
NTSC model:
When D ' 226
92
D ' = D ' + 29
93 92
When D ' > 226
92
D ' = 255
93
PAL model:
When D ' 29
92
D ' = D ' – 29
93 92
When D ' < 29
92
D ' = 00
93
Convert D ' to a hexadecimal
93
number, and obtain D
93
D Set the data, and press PAUSE
93
button.
00 Set the data.
. (Note2)