Main Pcb; 1 ] Block Diagram - Brother P-touch PT-2730 Service Manual

2.2.2

Main PCB

[ 1 ] Block Diagram

Fig. 2.2-2 shows a block diagram of the main PCB. The main PCB consists of the
following:
■ CPU
■ Flash ROM
■ Power ON/OFF circuit and power saving circuit
■ Feed motor driver circuit
■ Cutter motor driver circuit
■ Thermal head driver circuit
■ Voltage detector circuit and temperature sensor circuit ■ AC adapter detector circuit
■ Cassette sensor
■ Cutter sensor circuit
USB interface circuit
Baxklight control circuit
Encorde
Tape feed motor
DC motor control circuit
Cutter motor
DC motor control circuit
Reset circuit
Oscilattion circuit
Internal memory
RAM: 48K byte
AC adapter detector circuit
Power supply circuit
Figure 2.2-2 Block Diagram of Main PCB
LCD: 128x48 dots
FULL GRAPHICS
LCD interface circuit
CPU
V850ES/ST2
ROM: N/A
II - 8
■ Oscillation circuit
■ Reset circuit
■ LCD control circuit
■ USB interface circuit
■ Backlight control circuit
■ Encode circuit
■ Key board
ROM 64Mb (16 bit bus)
Thermal head driver circuit
Thermal head
180dpi, 128dots
Power supply voltage
detector circuit
Intermediate battery voltage
detector circuit
Environment temperature
detector circuit
RTC circuit (Oscilattion circuit)
Cutter sensor
Cassette sensor
Key board
[ON/OFF] key