Evf System Adjustment - Sony DCM-M1 Service Manual

1-2.

EVF System Adjustment

Note 1: The backlight (fluorescent tube) is driven with high volt-
age AC power. Accordingly, do not touch the backlight
holder; otherwise you could receive an electric shock.
Note 2: Take extreme care not to destroy the LCD unit by static
electricity, when replacing it.
Note 3: On the Menu screen, set the "Finder Brightness" to the
center.
Note 4: Once the 10-step gradation pattern (white/black) has been
set, it is held until the power is turned off. Therefore, it
is not necessarily set every time in successive adjust-
ment.
[Adjustment steps]
The EVF adjustment, as a rule, should be performed following the
steps given below.
Only for the "Backlight Consumed Current Adjustment", the or-
der may be changed.
1. EVF Adjustment Data Initializing
2. VCO Adjustment
3. Brightness Adjustment
4. Contrast Adjustment
5. Backlight Consumed Current Adjustment
6. White Balance Adjustment
[Connector for adjustment]
The measurement points for EVF adjustment are concentrated on
the CN4901 on the VF board. Connect a measuring instrument to
it via adjusting monitor jig (J-2503-017-A).
The following table lists the pin No. and signal name of CN4901.
Pin No.
VF board Adjustment
CN4901 monitor jig
5
4
3
2
1
–
–
–
–
–
VF board CN4901
1
5
Fig.7-1-6
– 5 –
Signal name
A EVF_GND
B G
C EVF_BL_4.95V (–)
D EVF_BL_4.95V
E VCO
F NC
G NC
H NC
I NC
J NC
Table.7-1-1
Use the connector with EVF labeling.
A
B
C
D
E
F
G
H
I
J
Adjusting monitor jig
(J-2503-017-A)