Backlight Adjustment (Vm-027 Board); Bright Adjustment (Vm-027 Board) - Sony Handycam DCR-PC115 Service Manual

2. Backlight Adjustment (VM-027 board)

Set the backlight luminance.
If deviated, the image may become dark or bright.
Mode Camera
Subject Arbitrary
Measurement Point Pin 3 of CN008 of VC-270 board
(EVF LED DA)
Measuring Instrument Digital voltmeter
Adjustment Page D
Adjustment Address 90, 91
Specified Value A = 2.10 ± 0.05Vdc
Adjusting method:
Order Page Address Data
1 0 01 01
2 D 91
3 D 91
4 D 91
5
6
7
8 D 90 D
90
9 0 01 00
Note: Refer to "Table 5-4-1. Hexadecimal-decimal Conversion Table".
Procedure
Set the data.
Change the data and set the voltage
(A) of Pin 3 of CN008 to the
specified value.
Press PAUSE button.
Read the data, and this data is
named D .
91
Convert D to decimal notation,
91
and obtain D '. (Note)
91
Calculate D ' using following
90
equation. (Decimal calculation)
D ' =D '– 96
90 91
Convert D ' to a hexadecimal
90
number, and obtain D . (Note)
90
Set the data, and press PAUSE
button.
Set the data.
DCR-PC115/PC115E/PC120BT/PC120E

3. Bright Adjustment (VM-027 board)

Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D 95
3 D 95
4 0 01
A
Pedestal
5-37
Camera
Arbitrary
Pin 4 of CN008 of VC-270 board
(EVF VG)
Oscilloscope
D
95
A = 7.20 ± 0.05V
Procedure
01 Set the data.
Change the data and set the
voltage (A) between the reversed
waveform pedestal and non-
reversed waveform pedestal to the
specified value.
Press PAUSE button.
00 Set the data.
Pedestal
2H
Fig. 5-1-19.