Color Electronic Viewfinder System; Adjustment; Vco Adjustment (Vm-027 Board) - Sony Handycam DCR-PC115 Service Manual

DCR-PC115/PC115E/PC120BT/PC120E
1-4. COLOR ELECTRONIC VIEWFINDER
SYSTEM ADJUSTMENT
Note1: When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
Note2: When the cabinet (R) is disconneted, 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.
Switch setting
LCD panel .................................................................... Closed
[Adjusting connector]
Most of the measuring points for adjusting the viewfinder system
are concentrated in CN008 of the VC-270 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. an2 signal name of CN008.
Pin No. Signal Name
1 LANC SIG
3 EVF LED DA
5 EVF VCO
7 PANEL VG
9 H START
11 PANEL COM
13 TCK
15 JIG TDO
17 SWP
19 GND
Table 5-1-10.
Pin No. Signal Name
2 N.C.
4 EVF VG
6 GND
8 VCO
10 XHD/PSIG
12 TMS
14 JIG TDI
16 GND
18 RF IN/LANC JACK IN
20 RF MON
CPC lid
CN008
19 20
1 2
Fig. 5-1-18.

1. VCO Adjustment (VM-027 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-PC115/PC120BT
PAL: DCR-PC115E/PC120E
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".
5-36
Camera
Arbitrary
Pin 5 of CN008 of VC-270 board
(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 ' 230
92
D '= D '+ 25
93 92
When D ' > 230
92
D '= 255
93
PAL model:
When D ' 25
92
D ' = D '– 25
93 92
When D ' < 25
92
D ' = 00
93
Convert D ' to a hexadecimal
93
number, and obtain D . (Note2)
93
D Set the data, and press PAUSE
93
button.
00 Set the data.