Table of Contents
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18-2-2. BT Board Y System's Frequency Characteristics Adjustment
Sweep signal
VIDEO
A
terminal
SIGNAL GENERATOR
• Teklronix 1410
I
!
·-------,
I.
Feed a sweep signal to the VIDEO A !!\PUT tem1inal of
this set.
2.
Set the YC SEP s,vitch on the sub control panel to the
COMB position.
3.
Connect the oscilloscope to TP2 on the BT board.
(AC 0.1 V/div:V)
4.
Set CVS to the position as shown in Fig. 18-3.
5.
Set the PAL S/SECAM F/COMB S button on the sub
contra! panel to the ON.
6.
Adjust the frequency characteristics until
it
is made flat
using CV] (Y FREQ) on the BT board.
If
it cannot be
properly adjusted by using CVI, use CVS (Y FREQ).
7.
Sec the PAL S/SECAM F/COMB S button to the OFF.
8.
Adjust the frequency characteristics until it is made flat
using CV2 ( l H Y FREQ) on the BT board.
9.
Set CV3 (CLK PHASE) and CV4 (CLK PHASE) on the BT
board to the position as shown in Fig. 18-4.
10. Adjust the clock phase until it becomes just as shown in Fig.
18-5 using CV3.
11. If it cannot be adjusted with CV3, adjust with CV4 by
returning CV3
to
the position of Fig. 18-4.
4-51
BT board
BT board
TP2
@
Oscilloscope
CVS
CVS
Fig. 18-3
Fig. 18-4
0
CV5
Fig. 18-5
AIJTO
SCAN MODE
SCREEN
APER- BLUE MONO
,-----,--,
,-----,--,
SET UP
TURE ONLY MODE
PROBE
DEGAUSS
[Ql
[D
Iii
R
0
e
0
[g) [g)[g)[g)[g)[g)[g)[g)[g)[g)
0
BT board
0
0
CV3
CS)
CV4
CS)
TP2
0
0
~~CV1
~
~
~
10]
CV2
o0
0
~~
01
10]
0
0
0
0
10]
0
00
010
0
FRONT PANEL
(@)
4-52
INPUT
POWER
PHASE
CIIR0M/1. BRIGHTNESS C0WRA.ST OVER
I
2
0 0 0 0
'~"gg
~
0
0
0
~
IT:)] IT:)] IT:)]
0
[g) [g)
MANUAL 3
'
1)
SUB CONTROL PANEL (HY board)
0
0
Qfr
0
OGAIN
0
1Qwi-11TE
BLUE
GREEN
srn
0
0
OD
0
O61AS
0
2QaRA.Y
0
0
POSITION ·LEVEL -ADJUST
0,
0,
~,
cw
CODED
o0"'
0
0
0
0
0
JOFORMAT
SETUP
~
TEST
e
•
0
'
0
0
0
~olNPUT
MARKER
m
'"'
0
0
FILTER
0
0
sQsYNC
S[CAM
"'
NTSC
0
0
MATRIX
'Aw
0
0
0
6OSYST[M
CHROMA
/PHASE
COMB
,AAS
•
omA~F
0
• •
7Qvc
SEP
COMB S
WHITE M[MJ
MEM2
MEMI
D66/093
"" "
"
"
so
0
o~~m
0
0
0
0
0
eQWl"a
