2FP/2FY/2FR
2-3-3
2-3-2 Engine board
Figure 2-3-3 Engine board circuit block diagram
Address/Data multiplex bus AD0 - AD7
Address bus A17 - A18
Address bus LA0 - LA7
5 V DC
power saver/
CPU cooling
fan motor
drive circuit
24 V DC
power
saver circuit
Waste toner
full detection
circuit
Paper gauge
sensing circuit
Power
supply
unit
Sensor
board
Laser
scanner
unit
CPU
cooling
fan
motor*
High
voltage
unit
Engine
relay
board
Option
unit
Cont-
roller
unit fan
motor
Bus
buffer
(U11)
ZCROSS
5VSAVE*
+24V2
+24V3
+5V3
+24V1
THERM
+5V1, +24V1
+24V1
+24V3
HTEMP*
HEATON
THDEAD*
TONSCAN
TNEMP*
MCHON, TRCHON, RTRCHON*,
TRVSEL1,TRVSEL2, TRVSEL3,
HVCLK1
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*
RESET*
HEATON*
AIRTEMP, AIRWET
WETCK1, WETCK2
FDPFUL*, EXITPAP*
FDON, FUON
FDDR, FUDR
FANDR, DVFANDR
FPRST*
DVFAN, FANON*
DVFANSPD, FANSPD
Driver
Driver
Engine board
ERASE
ERDEAD*
POLCLK, POLON,
POLRDY*
SAMPLE1*, POWCONT
PDIN*
WTNLED
EECLK
EEDIO
CASIZE
WTONFUL*
REGPAP, TCOVOP,
SCOVOP*,FCOVOP*,
PAPVOL
OPRDY*
ECOPOWER
A8 - A18
Toner motor
control
circuit
Cooling
fan motor
driver circuit
Controller
unit
fan motor
driver
circuit
Bus
buffer
(UU12)
Main
board
MMOTRDY*
LASER*
Eraser lamp
control
circuit
Flash
ROM
(U2)
CPU
(U1)
Engine
gate
array
(U7)
Reset
IC
(U5)
Abnormal
temperature
detection
circuit
3-
terminal
regulator
(U13)
Thermisor
blown-out
detection
Heater lamp
control circuit
*: For
FS-3820N
/3830N
models
only
Содержание DISCOVER FS-3830N
Страница 1: ...SERVICE MANUAL Published in June 2006 842FR116 2FRSM066 Rev 6 FS 1920 FS 3820N FS 3830N ...
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Страница 172: ...MEMO ...
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