Outline Of Control Electronics; Main Pcb; Media Position Detect Sensor Pcb (Tape Sensor - Brother TD-4000 Service Manual

2.2 OUTLINE OF CONTROL ELECTRONICS

Fig. 2.2-1 shows the block diagram of the control electronics. The control electronics
consist of the following components.
Cutter home
position sensor
CN14
CN16
Key, LED PCB
(SB PCB)
DC8V power PCB ASSY
2.2.1

Main PCB

This manages all the components. This PCB consists of CPU, EEPROM, USB chip
and motor drivers etc.
2.2.2

Media Position Detect Sensor PCB (Tape Sensor)

This sensor PCB detects the printing start position for the die cut label, and checks
existence of label for the free length label, using reflection type photo sensor.
PC HUB
USB LAN
CN13
CN12
CN10
Media
position
detect
sensor
Media feed motor
Power supply PCB
Figure 2.2-1 Block Diagram of the Control Electronics
Fan motor unit
Serial
CN5
CN6
CN19
CN7
CN11 CN8
Thermal head
II - 7
220/230/240V model only
Sub ASSY SW
Cutter motor
CN4
Cover open sensor