Epson DFX-9000 - Page 89

Epson DFX-9000 Revision B
Operating Principles Circuit operation 82
2.3.1.2 Mechanism control circuit
The Mechanism Control circuit is managed by the Mechanism Control
ASIC, and the figure below is the internal block diagram of this ASIC.
Figure 2-25. Mechanism control ASIC block diagram
Motor Drive control circuits
This printer has six circuits for driving the six motors: SP (Space or CR)
motor, LF (Line Feed) motor, RF (Ribbon Feed) motor, HCPP (Host-
Controlled Paper Path) motor, APTC (Automatic Paper Thickness
Control) motor, and OC (Open/Close) motor. There is also a control
system for the optional Perforation cutter unit. The ASIC controls the
motors. Motor timing signals are generated by the timer output from the
SoC ASIC. The following shows a block diagram of the motor control
section.
Figure 2-26. Motor control block diagram
Address
decode section
General-purpose
input control
section
HEAD alarm
control section
12C BUS
control section
OP panel
control section
General-purpose
output control
section
X42VPST
X37VPST
control section
MOTOR
control section
HEAD DRIVE
control section
Interrupt signal
control section
FAN alarm
control section
MOTOR alarm
control section
8-bit A/D
control section
CR ENC
control section
APTC ENC
control section
CLOCK
control section
CR MOTOR
control section
A[1-9]
XCE7
XRD
XWRL
D[0:15]
M_FTPE
M_RTPE
M_PPSS
M_OCS1
M_OCS2
M_PJS
M_APTC
M_RFS
M_RMS
M_PTRM
M_LES
M_PCHPS
M_PCRPS
POW_OFF
COPEN
N.C. (GND)
N.C. (GND)
N.C. (GND)
N.C. (GND)
HDALM[1-15]
42VOLT
H_CES[1:2]
M_APTC[1:2]
CLK24M
CR_BK
CR_STSP
CR_CWCCW
FANALM[1:4]
M_TIM[1:4]
LFSHTAL
LFLNGAL1
LFLNGAL2
OPCLAL
HCPPAL
APTCAL
RBSHTAL
PCAL
ERAMCLK
FRAMDO
O_DOT
O_SHIFT
O_LOAD
BZCLK
OP_SDIN
XSLON[1:2]
OUT[1:4]
XPST42V
XPST37V
LFM[A:D]
OCM[A:D]
HCPPM[A:D]
APTCM[A:D]
RBME[A:B]
RBMP[A:B]
RBMI[0:1]
PCMP,PCME
PD[01:36]
FB[01:36]
CR_IRQ
HD_IRQ
APTC_IRQ
CRM_BRAKE
CRM_STSP
CRM_CWCCW
LFMI[0:1]
PWMIN (20KHz)
LFM[A:D]
LFMI[0:1]
RBMP[A:B],RBME[A:B]
RBMI[0:1]
OCM[A:D]
HCM[A:D]
APM[A:D]
PHASE_P
ENABLE_N
ASIC
SP Motor
Driver Circuit
LF Motor
Driver Circuit
RF Motor
Driver Circuit
OC Motor
Driver Circuit
HCPP Motor
Driver Circuit
APTC Motor
Driver Circuit
SP Motor
LF Motor
RF Motor
OC Motor
HCPP Motor
APTC Motor
Perforation
Cutter Unit
M_CWCCW,M_STSP,M_BRAKE