Electronic Viewfinder System; Adjustment; Vco Adjustment (Vc-242D Board) - Sony DSR-PD150P Service Manual

1-4.

ELECTRONIC VIEWFINDER SYSTEM

ADJUSTMENT

Note1: 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.
Note2: When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
Note3: Set the switch as follow.
LCD screen ............................................................ OFF (Closed)
Note4: 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: 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 CN007 of the VC-242D board.
Connect the Measuring Instruments via the CPC-13 jig (J-6082-
433-A).
The following table shows the Pin No. and signal name of CN007.
Pin No. Signal Name
1 GND
2 RF MON
3 SWP
4 RF IN/LANC JACK IN
5 TDO
6 GND
7 TCK
8 TDI
9 PANEL COM
10 TMS
Table 5-1-7.
CN007
20
1
Remove the CPC cover
Fig. 5-1-17.
Pin No. Signal Name
11 H START
12 XHD/PSIG
13 EVF VB
14 EVF VR
15 EVF VCO
16 GND
17 EVF BL –
18 EVF VG
19 LANC SIG
20 EVF BL +

1. VCO Adjustment (VC-242D 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: DSR-PD150
PAL: DSR-PD150P
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".
5-31
Camera
Arbitrary
Pin qg of CN007 (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)