Epson DFX-8500 Service Manual page 71

DFX-8500
Level Converter
(IC9)
RAM
(IC14)
P-ROM
(IC5)
Optional
Type-B I/F
Card
PSB/PSE
Board
Option
Cutter
Panel Unit
2-18
Main Board
CPU
TMP95C061
(IC2)
EEPROM
(IC11)
24.57MHz
(CRU1)
TXD/RXD
POFF
AB
DB
Control
DTR/CTS
G/A
E05B36
(IC1)
AB
DB
Control
Control &
CL,
PD,
Monitoring
DRERR
+37 VDC,
+5 VDC
19.55MHz
(CRU2)
LED,
SW
Reset IC
RESET,
(IC13)
RSTOUT,
ERRCRPFX
PDATA1-8,
/STB,
/ACK, BUSY
Figure 2-15. Control Circuit Block Diagram
HTMP
PWIDTH
HFTMP
DRV Board
CRINS
RF Motor
RF
Drive Circuit
PF Motor
PF
Drive Circuit (IC2)
HPSENS,
DRV-B Board
HNSENS
Printhead
Drive Circuit 1/2
Printhead
PFA
Drive Circuit 2/2
HD
CR Motor
Current Monitoring
CRCLM Control & Drive
Circuit (IC1, IC3)
CR
ENCA,
ENCB
PG Motor
PG
Drive Circuit
PGENCA,
PGENCB
PLG Plunger Drive
Circuit
Fan Drive
FAN
Circuit
Head Fan
Drive Circuit
SWCNT
SWITCH
Mechanism
Cover Open
Sensor`
Printhead
Temperature
Paper Width
Head Fan
Temperature
CR Motor
Insulation
RF Motor
PF Motor
Printhead 1/2
Printhead 2/2
Interlock SW.
CR Motor
CR Encoder
PG Motor
PG Home
PG Encoder
PE Signals
(Front, Rear, Top)
Paper Jam
Ribbon Jam
Pull Tractor
Tractor Select
Plunger
Fan
Head Fan
SUB Board
(DIP SWs)