Subcarrier Phase Adjustment - Sony VideoStore VSR-2000 Service Manual

5-3. DEC-117 Board Adjustment (BKSR-2031)

5-3-4. Subcarrier Phase Adjustment

Connection
Personal computer
COM
* : Use the cables having same length.
5-14 (E)
Picture monitor
SONY
75 Z
terminated
Composite video
signal generator
COMPOSITE
VSR-2000
REF IN
REF OUT
COMPOSITE2
COMPOSITE1
EXT-232C
75 Z
terminated
CH-1
CH-2
75 Z
terminated
Vector monitor
Preparation
. Connect the equipment.
. Turn on the power of the VSR-2000 and warm up the
unit about 10 minutes.
. Remove the front panel.
. Connect the COM output of a personal computer to the
EXT-232C connector on the front of the VSR-2000.
. Set the service port selector switch so as to match the
slot of the board to be adjusted.
. Confirm that "DEC>" is displayed on the terminal.
Adjustment Procedures
1. Enter SC\ \ \ \ \ PHASE using the terminal software of a
personal computer and press the [ENTER] key. The
present value appears.
2. In order to delay the output subcarrier phase, enter
*
SC\ \ \ \ \ + + + + + and press the [ENTER] key. The output
phase is delayed by about 1.4d.
3. In order to advance the output subcarrier phase, enter
*
SC\ \ \ \ \ _ _ _ _ _ and press the [ENTER] key. The output
phase is advanced by about 1.4d.
4. In order to input values directly, enter a value in the
format of SC\ \ \ \ \ 10 and press the [ENTER] key.
Adjustment range 00 to FF (hexadecimal)
5. Repeat step 2 or 3 to adjust the phase until the specifi-
cation is satisified.
<Vector monitor>
CH-1 : REF
CH-2 : COMPOSITE 1
GEN LOCK : CH-1
A
6. Enter SC\ \ \ \ \ SET and press the [ENTER] key to save
the adjustment value in the NVRAM.
7. Enter RES and press the [ENTER] key to set the
DEC-117 board again.
Confirm again that the specification is satisfied.
A = 0 ± 1.5d
VSR-2000