Sony BVM-1916 Operation And Maintenance Manual page 116

24. BD BOARD (PAL) PAL-D GAIN AND CCD BIAS
ADJUSTMANT (BVM-2016P ONLY)
2T PULSE signal
Tektronix 1411 (PAL)
Generator
i I
1V (15n)
i
+l,
L+--1=1--++1--1-..11
iif-
L; LJ '
(REVERSE MODE)
• PAL S/SECAM FJCOMB S button
D
(SUB CONTPOL PANEL) ................................................. OFF
1. Complete the connection as shown in Fig. 24-1.
Turn on the power of this monitor. Set the INPUT switch to
the 1 position, and the SYNC switch to the INT position.
2. Connect the oscilloscope probe to TP2 on the BG hoard.
3. Turn RVS and RV6 on the BD board fully clockwise.
4. By
observing the waveform shown in
Fig. 24-2,
adjust
RV9
on the 8D board so that ii becomes A=B.
5. Adjust RVS on the 8D board so that the waveform shown in
Fig. 24-2 becomes flat.
6. Connect the probe of the oscilloscope to TP3 on the BG
board and observe the section shwon in Fig. 24-3.
7. Adjust RV10 on the 8D hoard so that the waveform of the
oscilloscope becomes A=B.
8. Adjust RV6 on the 8D hoard so that the waveform shown in
Fig. 24-3 becomes flat.
4-71
75n
terminator
VIDEO A
BG boa,d
~--1-<o>o@
D@
TP2,3
@
® @
Oscilloscope
TP2 on the BG board
....r
-- V cycle - _..,
(R·Y waveform)
• Delayed B mode
Adjust R V5 to be flat.
C '
n.,
I ~-' , ~ I
L---'~--~----
1,--_J .....
Fig. ~4-2
~ AILJ11
8
TP3 on the BG board
V cycle
r
-
(8-Y waveform)
( Delayed B mode
Adjust RV6 to be flat.
'l'"'
,_---~}
~
!
:-1
r
~
- I
Fig, 24-3
~
A]1J1.f1-I11'
BD board
[Q]
0
~~
0
[Q]
[Q]
~
00
~
[Q]
~
RV10 RV9
lQJo [Q] [Qj
0
0
00
r01RV5
0
tfal
RV6
0
0
0
[Q]
BG board
rQ]
[Q][Q]~~~
~
RY
8-Y
4-72