Sony BVM-2011P - 13. BC Board Y TRAP ADJUSTMENT (BVM-1911 ONLY)

13. BC Board Y TRAP ADJUSTMENT (BVM-1911 ONLY)
Tektronix 1410
Generator
*Color-bar signal
FULL FIELD color-bar)
1.5% set up
100 IRE
75% AMPL
• COLOR SYSTEM button
color-bar signal
0
(SUB CONTROL PANEL)······················ ....... NTSC
• YC SEP button (SUB CONTROL PANEL)········· TRAP
1. Input color-bar signal to VIDEO A terminal of the set.
BC board
BG board
VIDEO A
2.
3.
BG board
TP 1
HY board
o®D®
®
@ @
Oscilloscope
Connect an oscilloscope to the TPI of BG board.
Adjust LI of BC board so that 3.58MHz subcarrier is minimum
as shown in Fig. 13-1.
Fig. 13-1
BG board
[c5]
~
[gJ
[QJ[QJ[Q]~
QTP1 Y
0
0
~
4-43
Ll
[Q]
~[Q]
BC board
0
0
0
[Q]
~
~
0
0
~~
~
14. BC Barad Y-C DELAY TIME ADJUSTMENT (BVM-1911 ONLY)
FULL FIELD/Y REF Color-bar signal
Tektronix 1410
Generator
*Color-bar signal
(
FULL FIELD)
Y REF
• YC SEP button (SUB CONTROL PANEL) ............................ TRAP
I. 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 TPI 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=B
BG Board
[§]
1i:o1
~
[QJ~ tQ]
QTP1
lQ]
y
0
~
R-Y
4-44
r
BC board
HY board
TPI--------- ......
.__CH_T+-@o@ D ®
@
@
TP2
Oscilloscope
Adjust R VI so that E is equal to F.
BC Board
0
0
0
~
RV1
~
0
0
~tQ]
~