Sony DNW-A100 Maintenance Manual page 72

3-7. Video System Alignmnet (VPR-17 Board)
3-7-3. Composite Video Output Adjustment (Standard System)
Output Level Adjustment
1. To enter the maintenance mode, press S1101(G-1) on
the SS-63 board.
2. In C21 : VIDEO TEST SG of the maintenance mode,
select the following test signal.
DNW-A100/A50/A45:
DNW-A100P/A50P/A45P: 100% Color Bars
3. To exit the C2 : AUDIO/VIDEO CHECK, press the
MENU button two times.
4. Enter A20 : VPR VR of the maintenance mode.
Check (Adjustment)
5. Connect the analog composite waveform monitor to
each VIDEO OUTPUT COMPOSITE connector, then
check the white peak level.
If the specification is not satisfied, perform the
adjustment.
m
. The outputs of VIDEO OUTPUT COMPOSITE 1
and 2 connectors cannot adjust separately.
. When checking/adjusting the output of VIDEO
OUTPUT COMPOSITE 3 (SUPER) connector,
change the connection of the video monitor as
Connection 2 on the opposite page.
. The menu picture of the maintenance mode is
superimposed in the output of VIDEO OUTPUT
COMPOSITE 3 (SUPER) connector. If the super-
imposed picture obstructs, set the CHARACTER
switch on the sub control panel to OFF. (Be sure to
return it to ON after checking/adjusting.)
Output channel [Connection]
COMPOSITE 1 [Connection 1]
COMPOSITE 2 [Connection 1]
COMPOSITE 3 [Connection 2]
A
DNW-A100/A50/A45
3-36
75% Color Bars
Adjustment point Specification for
(A20 : VPR VR) DNW-A100/A50/A45
A = 100 ± 1 IRE
VIDEO 1/2 LEVEL
(A = 714 ±7 mV)
VIDEO 1/2 LEVEL
VIDEO 3 LEVEL
6. To exit A20 : VPR VR, press the MENU button once.
Data save (Store the adjusted data)
When the adjustment was not performed in step 5, skip
over to step 9.
7. Enter A2F : NV-RAM CONTROL, then execute
"SAVE ALL ADJUST DATA".
. Message "Save Complete" is displayed on the video
monitor when this data save is completed normally.
n
When loading the previous data without save the
current adjusted data, execute "ALL DATA PREVI-
OUS".
8. To exit A2F : NV-RAM CONTROL, press the MENU
button once.
9. To exit the maintenance mode, press the MENU
button three times.
Specification for
DNW-A100P/A50P/A45P
B = 700 ± 7 mV
B
DNW-A100P/A50P/A45P
DNW-A100/A50/A45
DNW-A100P/A50P/A45P