Kyocera FS-1900 - Engine Board

4-27
FS-1900
(2) Engine board
Address/Data multiplex bus AD0 - AD7
Address bus A8 - A19
Address bus LA0 - LA7
5 V DC
power
saver
Waste toner
full detection
circuit
Paper
gauge
sensing
circuit
Power
supply
unit
Sensor
board
Scanner
unit
High
voltage
unit
Engine
relay
board
Option
unit
Cont-
roller
unit fan
motor
Bus
buffer
(U206)
ZCROSS
5VSAVE*
+5V3
+24V1
THERM
+5V1, +24V1, +24V2
HTEMP*
HEATON
THDEAD*
TONSCAN
TNEMP*
MCHON, TRCHON, RTRCHON*,
TRVSEL1,TRVSEL2, TRVSEL3,
TRTCHON, HVCLK1, HVCLK2
MMOTON, MPFSOL, FEDDR, MIDDR, REGDR
TMOTON
DLPTYPE, CONTYPE
TNMOC
HUNIT*, HANDS*
FPCLK, FPDIR
FPDATA
+3.3V1
SIOUT
VSEREQ*
SOOUT, SCLKOUT
RD*, WR*, ALE
OPSCLK,
OPSDO
BFANON
OPTSDI
OPSEL3-5
OPSDI, OPRDY*
SYSRES*, SDIR,
VDFON1*, PDOUT*,
20PTRIG, SBSY*
EGIR, VDFON1*
SCLKIN, SOIN
OPSEL0-2
FRCS*
GAINT
SYSCLK
RESET*
RESET*
HEATON*
AIRTEMP, AIRWET
WETCK1, WETCK2
FDPFUL*, EXITPAP*
FDON, FUON
FDDR, FUDR
FPRST*
FANON*
FANSPD
Driver
Driver
Engine board
ERASE
ERDEAD*
POLCLK, POLON,
POLRDY*
SAMPLE1*, POWCONT
PDIN*
WTNLED
EECLK
EEDIO
CASIZE
WTONFUL*
REGPAP, TCOVOP,
SCOVOP*,FCOVOP*,
PAPVOL
OPRDY*
A8 - A17
Toner motor
control
circuit
Cooling
fan motor
driver circuit
Controller
unit
fan motor
driver
circuit
Bus
buffer
(U207)
Main
board
MMOTRDY*
LASER*
Eraser lamp
control
circuit
Flash
ROM
(U202)
CPU
(U201)
Engine
gate
array
(U204)
Reset
IC
(U203)
Abnormal
temperature
detection
circuit
3-
terminal
regulator
(U208)
Thermisor
blown-out
detection
Heater lamp
control circuit
Figure 4-3-6 Engine board circuit block diagram