Engine Board - Kyocera FS-1920 Service Manual

2-3-2 Engine board

Eraser lamp
Waste toner
Sensor
full detection
board
circuit
Paper gauge
sensing circuit
+24V1
+5V1, +24V1
+24V3
Power
supply
unit
Engine
relay
board
Driver
FANDR, DVFANDR
High
voltage
unit
ERASE
control
ERDEAD*
circuit
WTNLED
WTONFUL*
EECLK
EEDIO
PAPVOL
CASIZE
ZCROSS
THERM
Thermisor
THDEAD*
blown-out
detection
Abnormal
HTEMP*
temperature
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,
Figure 2-3-3 Engine board circuit block diagram
Engine board
24 V DC
+24V2
power
saver circuit
5VSAVE*
OPRDY*
Address/Data multiplex bus AD0 - AD7
Address bus A17 - A18
Address bus LA0 - LA7
A8 - A18
CPU
(U1)
RESET*
RD*, WR*, ALE
SOOUT, SCLKOUT
SYSCLK
GAINT
Reset
RESET*
IC
(U5)
RESET*
REGPAP, TCOVOP,
SCOVOP*,FCOVOP*,
HEATON*
FDPFUL*, EXITPAP*
FDON, FUON
MMOTRDY*
DVFAN, FANON*
DVFANSPD, FANSPD
FPRST*
TMOTON
TNMOC
DLPTYPE, CONTYPE
TONSCAN
TNEMP*
HVCLK1
HUNIT*, HANDS*
5 V DC
+24V3
power saver/
CPU cooling
fan motor
drive circuit
ECOPOWER
Engine
gate
array
(U7)
Flash
ROM
(U2)
FRCS*
3-
terminal
+24V1
+5V3
regulator
(U13)
POLCLK, POLON,
POLRDY*
PDIN*
SAMPLE1*, POWCONT
LASER*
Controller
unit
BFANON
fan motor
driver
circuit
OPSCLK,
OPSDO
Bus
buffer
(U11)
OPTSDI
OPSEL0-2
Bus
OPSEL3-5 buffer
(UU12)
OPSDI, OPRDY*
SYSRES*, SDIR,
VDFON1*, PDOUT*,
20PTRIG, SBSY*
EGIR, VDFON1*
SCLKIN, SOIN
FPCLK, FPDIR
FPDATA
+3.3V1
2FP/2FY/2FR
CPU
cooling
fan
motor*
*: For
FS-3820N
/3830N
models
only
Laser
scanner
unit
Cont-
roller
unit fan
motor
Option
unit
Main
board
2-3-3