Contrast Adjustment (Vf-141 Board); Backlight Consumption Current Adjustment; (Vf-141 Board) - Sony CCD-TR317 Service Manual

4. Contrast Adjustment (VF-141 board)

Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode Camera
Subject Arbitrary
Measurement Point Pin qh of CN982 (EVF VG) on VC-234
board
Measuring Instrument Oscilloscope
Adjustment Page 7
Adjustment Address DC
A=2.20 ± 0.1V
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 7, address: DE, set data: 10, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 7, address: DC, change the data and set the voltage
(A) between the pedestal (0 IRE) and 100 IRE to the specified
value.
(The data of address: DC should be "00" to "7F".)
4) Press the PAUSE button.
5) Select page: 7, address: DE, set data: 90, and press the PAUSE
button.
6) Select page: 0, address: 01, and set data: 00.
100 IRE
A
Pedestal
Fig. 5-1-15.
2H

5. Backlight Consumption Current Adjustment

(VF-141 board)

Set the backlight luminance and color temperature.
If deviated, the image may become dark or bright.
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: Perform the adjustment in the following order.
Note2: Use the AC power adaptor.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 7, address: DF to E1, and set data to the initial
value.
Note: To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
Address
DF
Data
CA
3) Select page: 7, address: E0, change the data and set the voltage
difference (A) between Pin qf of CN982 (EVF BL 4.75V) and
Pin qd of CN982 (EVF BL) to the specified value of BRIGHT
mode.
(The data of address: E0 should be "00" to "3F".)
4) Press the PAUSE button of the adjustment remote commander.
5) Read the data of page: 7, address: E0, and take it as D
6) Obtain D corresponding to D
DF
D
E0
00 to 0F
10 to 1F
20 to 2F
30 to 3F
Note: The lower digit of D
Example: If D is "1B".
E0
D = DB
DF
7) Select page: 7, address: DF, set the data: D
PAUSE button.
8) Select page: 7, address: E1, change the data and set the voltage
difference (A) between Pin qf and Pin qd to the specified value
of NORMAL mode..
(The data of address: E1 should be "00" to "1F".)
9) Press the PAUSE button.
10) Select page: 0, address: 01, and set data: 00.
5-29
Camera
Arbitrary
+ Probe: Pin qf of CN982
(EVF BL 4.75V) on VC-234 board
– Probe: Pin qd of CN982
(EVF BL) on VC-234 board
Digital voltmeter
7
DF, E0, E1
BRIGHT mode : A=15.5 ± 1.0mVdc
NORMAL mode : A=9.5 ± 1.0mVdc
E0 E1
0A 13
from the following table.
E0
D
DF
C0 to CF (Note)
D0 to DF (Note)
E0 to EF (Note)
F0 to FF (Note)
is equal to it of D .
DF E0
, and press the
DF
.
E0