Brother P-touch PT-3600, Service Manual

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[ 2 ] Solder Ponits
Fig. 2.2-3 shows the solder point circuit.
One of solder points SP1 - SP8 (L, A, B, C, D, E, F, S) is soldered according to the resistance level
of the thermal head.
When the thermal head is replaced, solder it according to the rank of the replaced thermal head.
The solder points are read once immediately after the power is turned on.
Fig. 2.2-3 Solder Point Circuit
[ 3 ] Cassette Sensor & AV Cassette Sensor Circuit
The sensor circuit consists of a 5-switch cassette sensor (CSNS0 through CSNS4) and AV cassette
sensor (AVSW).
Loading a tape cassette turns on some of those five 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.
The AV cassette sensor (AVSW) is provided for distinguishing AV labels cassettes from TZ
cassettes.
With the states of those sensor switches, the CPU identifies the tape width, ink ribbon type of the
tape cassette , and TZ/AV type, as listed in Table 2.2-1.
Fig 2.2-4 shows the cassette sensor and AV cassette sensor cirsuit.
Fig. 2.2-4 Cassette Sensor and AV Cassette Sensor Cirsuit