Connections For Adjustment - Hitachi VK-U174 Service Manual

Adjustment > Preparations for Adjustment

6-1-3 Connections for adjustment

Connect the video camera to the test equipment and jigs as shown in Fig. 6-1-1
LIGHT
BOX
PC CIRCUIT
BOARD
DSP INTERFACE
CONNECT JIG
DC POWER
SUPPLY
(9V/3A)
+
GND
DC POWER
SUPPLY
(5V/1A)
+
GND
Note:
1) The adjustment program will not operate normally unless the video camera, PC and DSP-R jigs
are all turned on.
2) Take care with the following when pointing the video camera at a chart (light box):
a) Focus the chart correctly.
b) Set the chart (light box) 30-50 cm away from the lens surface, and avoid any effects from
surrounding light (except for a case where some designation is given).
3) Be sure to connect the video output of video camera to a color video monitor (terminate the video
output with 75 ohm):
If the video output is not connected to the monitor (and if it is not terminated with 75 ohm), the
output video signal level cannot be measured correctly.
4) Use light box that does not flicker and whose color temperature is controlled, for adjustment. If
an inappropriate light box is used, precise adjustment will not be possible, and the adjustment
program will not operate normally.
30 - 50cm
CSR CIRCUIT
BOARD
9PIN FLAT CABLE
(ACCESSORY)
PG3501
1 RD(232C) WHT
1
2 SD(232C) BRW
3 GND BRW
4 +B BRW
5 GND BRW
6 VIDEO BRW
1 2 3 4 5 6 7 8 9
7 GND(VIDEO) BRW
8 EX-FV BRW
GND(EX-FV) BRW
9
YEL
RED
BLK
DSP-R JIG
Fig. 6-1-1
VECTORSCOPE
To To
OUTPUT
INPUT
9
WHT
PERSONAL
BLK
COMPUTER
RS-232C
CABLE
6 - 2
OSCILLOSCOPE
CH1 CH2
When using an
osilloscope only
To VIDEO IN
TERMINAL
COLOR
MONITOR