EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850
Revision A
OPERATING PRINCIPLES
Electrical Circuit Operating Principles
56
2.4.2.2 Print Head Driver Circuit
The Print Head driver circuit consists of the following two components:
Head common driver circuit (Common driver IC11 & Wave amplifier
transistor Q9, Q10)
Nozzle selector IC on the Print Head driver
The common driver (IC11) generates a basic drive waveform according to the output
signals from CPU (IC8). The basic drive waveform is amplified by the transistors Q9
and Q10 (the amplified one is called drive waveform.) and then transferred to the
nozzle selector IC on the Print Head driver board. Print data is converted to serial data
by the CPU and then sent to the nozzle selector IC on the Print Head driver board.
Based on the serial data, the nozzle selector IC determines the nozzles to be actuated.
The selected nozzles are driven by the drive waveforms amplified by the transistor Q9
and Q10. Refer to
Figure 2-19
(p.56)
for the Print Head driver circuit block diagram.
Head common driver circuit
The basic drive waveform is generated in the common driver (IC11) based on the
following 13 signal lines output from the CPU (IC8); DATA0-DATA9, LAT,
RESET, and PSCNT.
By the DATA signal output from the CPU, the original data for the basic drive
waveform is written in the memory in the common driver (IC11). The addresses
for the written data are determined by DATA0-DATA9 signals. Then, the
necessary data is selected from the address and appropriate basic drive waveform
is generated. Generated basic drive waveform is transferred to nozzle selector IC
on the Print Head driver board through the transistor Q9 and Q10 and applied to
the nozzle PZT specified by nozzle selector IC.
Nozzle selector circuit
Printing data is allocated to the four rows (the number of the head nozzle rows)
and converted into serial data by the CPU (IC8). Then the converted data is
transferred to the nozzle selector IC through the two signals lines (HS01 to HS02).
Data transmission from the CPU to the nozzle selector synchronizes with the LAT
signal and SCK clock signal. Based on the transmitted data, appropriate nozzle is
selected and the PZTs of the selected nozzle are driven by the drive waveform
output from the head common driver.
Figure 2-19. Print Head Driver Circuit
CPU
(IC8)
Head Driver
(IC11)
Nozzle
Selector IC
+42V
Head
Drive
Pulse
CN6
CN5
HDAC_D0
HDAC_D1
HDAC_D2
HDAC_D3
HDAC_D4
HDAC_D5
HDAC_D6
HDAC_D7
HDAC_D8
HDAC_D9
HDAC_CLK
HDAC_RST
PC3
HSOCLK
HS01
HS02
HLAT
HCH
NCHG
AN1
VHV
COM
SCK
SI1_Bk
SI2_Col
COM
LAT
CH
NCHG
XHOT/TMM
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
CLK
NAST
STBY
+42V
+3.3V
NPNB
FEEDBACK
PNPB
GND_9
GND_10
A15
B15
C15
D15
C13
B13
A13
C14
B14
A14
C16
C17
B1
C12
B8
A7
B9
A8
C11
A5
4
3
2
1
24
23
22
21
20
19
5
6
7
F1
+3.3V
16
Q9
3
2
7
10
1
3
5
7
9
5
Q10
F2
18
14
13
12
9
10
+3.3V
Содержание CX3810 - Stylus Color Inkjet
Страница 1: ...EPSON StylusCX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Color Inkjet Printer SEIJ05 012 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A Aug 10 2005 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 35: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 61: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 92: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Страница 133: ...C H A P T E R 5 ADJUSTMENT ...
Страница 148: ...C H A P T E R 6 MAINTENANCE ...
Страница 155: ...C H A P T E R 7 APPENDIX ...
Страница 168: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 MAIN Rev B Sheet 1 2 ...
Страница 169: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSB Rev B Sheet 1 1 ...
Страница 170: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSE Rev B Sheet 1 1 ...
Страница 171: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 PNL Rev A Sheet 1 1 ...