Engine Board - Kyocera FS-1900 Service Manual

(2) Engine board

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