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ii
2-9 System
switch
output
The outputs from pins 4,40and
340fthe
CPUselect
thecolour
system and the outputs
from pins 49 to 52 the SIF system. These outputs drive the colour and SIF system switching
circuits. The operation of each switching circuit is shown in the table below.
Colour system switching output
Output pins
System
Xtal/lD
~oltage(V)
4
40
34
PAL
0-
1.0
HzLL
TV
SECAM
0-
1.0
LLL
NTSC4.43
4.0-
5.0
HzLL
NTSC
2.7-
3.6
HzLH
I
I PAL
!
0-
1.0
ll-fz
I-1*
II
AV
SECAM
0- 1.0
HH*
NTSC4.43
4.0 -5.0
Hz
H
*
I
I
NTSC
I
2.7- 3.6
I
HzH*
"
It
dependson receiving TV system
HZ=
High impedance
SIF system switching output
1.
Multi system
SIF system
r
Auto
5.5 MHZ
6.OMHZ
6.5MHz
4.5MHZ
Output pins
Display
52
51
50
49
*
HHH
S1
LHLL
S2
LLHL
S3
LLLH
S4
HLLL
S5
" The output
level of pin 52 in
the AUTO mode is determined by
the following condition
~
AUTO BAN
50
L
TV
. AUTO B/W
H
PAL
50 or 60
L
SECAM
500r60
L
NTSC4.43
50 or 60
L
NTSC
50 or 60
H
AV
It maintains the condition of TV mode.
2.
PX system
6.5 MHz
LLLH
S3
4.5 MHZ
HLLL
S4
'
Same condition with Multi-system
3.
Indonesia a system
SIF system
Output pins
Display
52
51
50
49
Auto
*
HLL
S1
5.5 MHZ
LHLL
S2
4.5MHZ
HLLL
S3
" Same condition with Multi-system
-17-
Training
Manual
AC 1Chassis
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