Brother P-touch PT-D600, Service Manual

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2.2 Outline of Control Electronics
2.2.1 Configuration
Figure 2.2-1 shows a block diagram of the control electronics of this machine. The
control electronics consists of three PCBs (main PCB, key PCB and side sensor
PCB), a LCD, stepping motor, DC motor, thermal print head and cutter sensor.
 Main PCB
This PCB manages all the components including a LCD, DC motor, stepping motor
and thermal print head and AC jack. For electronic devices on the main PCB, refer
to Section 2.2.2.
 Key PCB
This PCB is connected with the main PCB via a relay harness.
 Side sensor PCB
According to the states of the five sensor switches on this PCB, the CPU can
identify the tape width and type of the tape cassette loaded.
 LCD
The LCD has 320 x 120 dots.
 Stepping motor
The stepping motor is a power source to advance the tape and ink ribbon.
 Thermal print head
This is a thick-film thermal print head which integrates a heat generator (consisting
of 128 heating elements vertically aligned in 180 dpi) and driver circuitry.
 Cutter sensor
The cutter sensor detects the position of cutter.
 DC motor
The DC motor is a power source to drive the auto cutter.
 Cover open sensor
This sensor detects the condition of cassette cover.
 Color sensor
This sensor detects the color of the ink ribbon using the five switches.