Option Switches - Sanyo ACI-A Training Manual

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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 option switch-
es pins, pins, 1, 5, 6, 7, 16,49 to 52.
Following table shows the option functions and assigned pins of the CPU for each chassis.
Option functions
&lcl-A
AC1-B AC1-C
Inhibit
pin 1
nla nla
Bass expander
nla pin 1 pin 1
Type of tuner
pin 5 pin 5 pin 5
No.s of positions
pins 6,48 nfa nla
No.s of positions & AV modes
nla nla pins 6, 48
RC status pin 7
nla nla
Blue back in
TV
mode nla
pin 6 nla
Colour system pin 16
pin 16 pin16
SIF system
pins 49-52 pins 49-52 pins 49-52
* n/a = not available
Inhibit function (AC1-A chassis)
Buss
CPU
10
1
'9
expander function ( AC1-B and AC1-C
IN.SW
Specification
off
w/o Inhibit function
on w/ Inhibit function
chassis)
CPU
Rx
EX.SW
Specification
off w/o Bass expander function
1
'9
on w/ Bass expander function
Type of tuner
CPU
10
TU.SW
Specification
off Normal tuner
5
'Y
on CATV channel or hyper tuner
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Training Manual AC I Chassis