Table of Contents
Advertisement
2-2 Option switches
This chassis uses the option function switches to determine several different specifications
of
the TV set.
The CPU determines
the specification
of TV by detecting
the voltage level on the following
pins.
Tuner type: pins 17 and 18, Colour system: pin 11, SIF system: pins 36 to 40, Remote control
status: pin 46, Blue back function: pin 45.
Pins 36 to 40 also operate as SIF system selection outputs.
Tuner type
CPU
17
18
Colour system
CPU
11
5
5
10k
10k
4
5
Rx
10k
Swl
SW2
Pinl
7
Pinl
8
St3ecification
off
off
H
H
3 band
on
off
L
H
UHF only
off
on
H
L
4 band
on
on
L
L
UHF only
-I
,,, ,,
1
,
IA
I
"
""lo,
"La,,
"!
.
Ov
open I Colour system A(w/o tint VR)
1.16V
2.00V
2.98V
3.76V
4.95V
33k
Colour system B(w/ tint VR)
15k
Colour system C(for VMT)
6.8k
Colour system D(for East Europe)
3.3k
Colour system E(for multi system)
100
Colour system F(for Indonesia, China,)
A7-A
-8-
Advertisement
Table of Contents
