Sony BVM-1916 Operation And Maintenance Manual page 101

13. BC Board Y TRAP ADJUSTMENT (BVM-1916 ONLY)
Tektronix 1410
Generator
*Color-bar signal
FULL FIELD color-bar)
1.5% setup
100 IRE
15%AMPL
• COLOR SYSTEM button
color-bar signal
I
I
11
0
(SUB CONTROL PANEL)····················· ······· NTSC
• YC SEP button (SUB CONTROL PANEL)· ··· TRAP
l. Input color-bar signal to VIDEO A terminal of the set.
BG board
0
~
~
~~~o
0
~~~
BC board
BG board
VIDEO A
BG boa,d
'--t@•@) c--=@)
TP 1
@)
@ @
Oscilloscope
2 Connect an oscilloscope to the TPl of BG board
3. Adjust LI of BC' board so that 3.58\1Hz subcarrier is minimum
as
shown in Fig. 13-1.
Fig. 13-1
BC board
L1
~
[2] [2]
0
~
[2]
0
~~
~
~
0
-
~
0
~
0
4-41
14. BC Borad Y-C DELAY TIME ADJUSTMENT (BVM-1916 ONLY)
FULL FIELD/Y REF Color-bar signal
Tektronix 1410
Generator
*Color-bar signal
(
FULL FIELD)
Y REF
• YC SEP button (SUB CONTROL PANEL)
Input color-bar signal (FULL FIELD/Y REF) to the VIDEO A
terminal of the set.
2 Connect an oscilloscope (CH-I probe) to the TPJ of BG board
and connect an oscilloscope (CH-2 probe) to the TP2 of BG
board (VERT mode of the oscilloscope is CHOP).
3 Adjust RV! of BC board so that the output waveform as
shown in Fig. 14-1.
TP2 (R·Y)
TP1 (Y)
Fig. 14· 1
A-8
BG Board
~
[Q][Q]~~~T~1
~
0
~
~
~~~
QTP2
0
~~~
R.y
4-42
BC board
TP1 ,-----------,
'-C_H_11-<e•@)
D
®
CH2
@)
TP2
@
Oscilloscope
Adjust R V1 so that Eis equal to F.
BC Board
RV1
~
0
0
~~
~
~
0
~
0
~
0