Sony DXC-390, Service Manual, Page: 50 / 110

4-2 (E)
DXC-390/390P
4-1-3. Description of Side Panel Sheet
Switches
Adj. no. is selected by the arrow
t
(up) or the arrow
T
(down).
Data is adjusted by the arrow R (up) or the arrow r (down).
Side Panel Sheet Switch
4-1-4. Super Reset (data initialization)
1. Pressing the S101 switch on the SG-265 board and turn
the power on.
2. After fifteen seconds, the initial data is written and the
picture appears.
3. Turn the S102 switch on the SG-265 to the ADJ side
(down side).
4. The ADJ picture is displayed.
Adjust number XX is shown data XX.
4-2. Adjustment
4-2-1. VCO Adjustment
(original oscillator adjustment)
Equipment : Monitor screen
Preparation
: Input the VBS OUT on a camera to
the EXT IN on a signal generator.
Input the SC output on a signal
generator to a frequency counter.
Adjustment Procedure : Adjust Adj61 (NTSC) or Adj14
(PAL) so that the SC frequency
becomes the specification.
Specification
: 3.579545 MHz
±
5 Hz (NTSC)
: 4.433618 MHz
±
5 Hz (PAL)
4-2-2. Built-in Color Bars Adjustment
(adjustment from DSP)
Equipment : Waveform monitor and vectorscope
Preparation : Press the BARS button to the
built-in color bars side.
..... R/G/B OUT Adjustment
Adjust Adj31 so that the white
level becomes the specification A.
..... R OUT Adjustment Adjust Adj32 so that the wave-
form becomes the specification B.
..... B OUT Adjustment
Adjust Adj33 so that the wave-
form becomes the specification C.
Specification
: A=75 IRE
±
1 IRE (NTSC)
700 mV
±
7 mV (PAL)
B : The waveform becomes flat.
C : The waveform becomes flat.
MENU
BLACK
WHITE
ENTER
BARS
FILE
SELECT
Adj no.
XX
XX
data.
Monitor Screen
R
B
G
DXC-390
DXC-390P
B, C
A
R
B
G
B, C
A