Drive Circuit - Canon QY8-1360-000 Service Manual

Part 4: Technical Reference

3.2.5 Drive circuit

The drive circuit built into the heater board controls the ejection of inks. The drive
circuit differs according to the type of BJ cartridge.
1) BC-60
The black head and ink optimizer head are each equipped with the drive circuit
shown in Figure 4-21.
VH
RANK
Rank Resistance
GND
SUBH
HEATE
ODDE
EVENE
BE0
BE1
BE2
INV
IDATA
DCLK
LTRST
LTCLK
VDDH
EL
See diagrams below.
ID1
ID2
TSK
TSA
Black Head
EL
ID1
ID2
Sub-heater
Block
Enable
Decoder
100
310 119
310-bit 310-bit
120
Shift Register Latch
137
192
211
212
231
232
249
304
310
VDDH
Head Temperature Sensor
Ink Optimizer Head
Contact EL
ID1
ID2
Figure 4-21 Block Diagram of BC-60 Drive Circuit
1
2
1
6
2
7
8
1 25
2
7
80
8
25
99
80
100
99
119
120
137
192
211
212
231
232
249
304
310
Contact
4-24
BJC-7100
Heater
1
310-bit
Transistor Array
Heater
310