2 ] Cassette Sensor - Brother P-touch PT-2730 Service Manual

[ 2 ] Cassette Sensor

The sensor circuit consists of a 7-switch cassette sensor (SW1 through SW7).
Loading a tape cassette turns on some of those seven switches on the cassette sensor
while keeping other switches off depending upon the ID encoding holes provided in the
tape cassette currently loaded. If an encoding ID hole is closed, the corresponding
sensor switch goes on.
With the states of those sensor switches, the CPU identifies the tape width, ink ribbon
type of the tape cassette, as listed in Table 2.2-1.
Table 2.2-1 Coded Values for Identifying Tape Cassette Type
Cassette not installed.
3.5mm Non-laminated tape cassette
6mm Laminated tape cassette
Non-laminated tape cassette
9mm Laminated tape cassette
Non-laminated tape cassette
12mm Laminated tape cassette, Instane
lettering tape cassette
Non-laminated tape cassette, Fabric
tape cassette, Refill tape cassette,
Recycled tape cassette
18mm Laminated tape cassette
Non-laminated tape cassette, Fabric
tape cassette, Recycled tape cassette
Instane lettering tape cassette, Iron-
on transfer tape cassette
24mm Laminated tape cassette, Instane
lettering tape cassette
Non-laminated tape cassette, Refill
tape cassette, Recycled tape cassette
* The tape cassette type is detected by the detecting switches provided in the machine
and the hole provided in the tape cassette.
0: ID hole opened, sensor switch OFF
1: ID hole closed, sensor switch ON
Cassette type
SW6
<Position of sensor switches>
Quintuple switch
SW1 SW2 SW3 SW4 SW5
0 0
0 0
0 0
0 0
1 1
1 1
0 1
0 1
1 0
1 0
1 1
1 0
1 0
SW5
SW4
SW1 to SW6:
For the detection of the tape cassette.
SW3
SW7:
SW2
For the detection of the opening/closing
of the cassette cover.
SW7
SW1
(Top view)
II - 9
SW6
0 0 0
1 1 0
1 0 0
1 1 0
1 0 0
0 0 0
0 0 0
1 1 0
1 1 0
0 0 0
1 0 1
1 1 1
0 0 1
0
1
0
0
0
0
0
0
0
0
0
0
0