Bj Print Head Drive; Construction Of Electric Head Unit - Canon BJ-W3000 Service Manual

B. BJ Print head Drive

1. Construction of electric head unit

The figure below is a block diagram of the BJ print head drive control circuit.
VH
RANK
GNDH
SUBH
ODD
EVEN
ODATA
HSEL1A
HSEL1B
HSEL2A
HSEL2B
HENB1A
HENB1B
HENB2A
HENB2B
TA
VDD
GNDL
IODATA
DCLK
RESET
LTCLK
DIR
BENB0
BENB1
DIA
DIK
Rank resistance
Sub-heater X2
1
2
3
5
7
160
9
112
113
159
160
Serial transfer unit
2 4
0
Decoder
1
2
3
Head temperature
sensor
Figure 2-304
CHAPTER 2. BASIC OPERATION
*
Heater 1A
1A
Heater 1B
1B
Heater 2A
2A
Heater 2B
2B
Heater 3A
3A
Heater 3B
3B
Heater 5A
5A
Heater 7A
7A
Heater 9A
9A
Heater 9B
9B
Heater 112B
112B
Heater 113A
113A
Heater 113B
113B
Heater 159B
159B
Heater 160A
160A
Heater 160B
160B
* Heater A: Large heater
Heater B: Small heater
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