Epson DFX-9000 Service Manual page 89

Epson DFX-9000
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.
A[1-9]
XCE7 Address
XRD
decode section
XWRL
D[0:15]
M_FTPE
M_RTPE
M_PPSS
M_OCS1
M_OCS2
M_PJS
M_APTC
General-purpose
M_RFS
input control
M_RMS
M_PTRM section
M_LES
M_PCHPS
M_PCRPS
POW_OFF
COPEN
N.C. (GND)
M_TIM[1:4]
LFSHTAL
LFLNGAL1
LFLNGAL2
OPCLAL
HCPPAL
MOTOR alarm
APTCAL
control section
RBSHTAL
PCAL
N.C. (GND)
N.C. (GND)
N.C. (GND)
HEAD alarm
HDALM[1-15]
control section
8-bit A/D
42VOLT
control section
CR ENC
H_CES[1:2]
control section
APTC ENC
M_APTC[1:2]
control section
CLOCK
CLK24M
control section
CR_BK
CR_STSP
CR MOTOR
CR_CWCCW
control section
FAN alarm
FANALM[1:4]
control section
Figure 2-25. Mechanism control ASIC block diagram
Operating Principles
12C BUS ERAMCLK
FRAMDO
control section
O_DOT
O_SHIFT
OP panel
O_LOAD
control section
BZCLK
OP_SDIN
General-purpose
XSLON[1:2]
output control
OUT[1:4]
section
X42VPST
XPST42V
X37VPST
XPST37V
control section
LFM[A:D]
LFMI[0:1]
OCM[A:D]
HCPPM[A:D]
MOTOR
APTCM[A:D]
RBME[A:B]
control section
RBMP[A:B]
RBMI[0:1]
PCMP,PCME
PD[01:36]
HEAD DRIVE
control section
FB[01:36]
CR_IRQ
Interrupt signal
HD_IRQ
APTC_IRQ
control section
CRM_BRAKE
CRM_STSP
CRM_CWCCW
Circuit operation
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.
M_CWCCW,M_STSP,M_BRAKE
ASIC
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
Figure 2-26. Motor control block diagram
Revision B
SP Motor
SP Motor
Driver Circuit
LF Motor
LF Motor
Driver Circuit
RF Motor
RF Motor
Driver Circuit
OC Motor
OC Motor
Driver Circuit
HCPP Motor
HCPP Motor
Driver Circuit
APTC Motor
APTC Motor
Driver Circuit
Perforation
Cutter Unit
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