Brother P-Touch PT-2730, Service Manual

Page: 19 / 105

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