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4-26
FS-1900
4-3-2 Operation of circuit boards
(1) Main board
Figure 4-3-4 Main board circuit block diagram
Q01
Digital Transistor
Q02
Digital Transistor
74LV
32A
YC06
USB I/F
USBINT
USBDN
CDD15-8
EDB31-24
EBIU Data bus
EBIU Address bus
VBUS
USBDP
EBA22, EBA10-1
EBA22, EBA10-1
CDET11, CDET12, CDRST1
CDET21, CDRST2
CDWAITN
CDCSN1
CDCSN2
EBOEN1, EBWEN1
EBCSN2
CDCSN1
EBWEN3
CDCSN2
YC08
RESETN
FPCLK
FPDIR
FPDAT
VDEONSPI
PDN
VDATAP, VDATAN
EGSI, SCKN
SCK, SO, SEL(0-2)
SLREADY
OP24V, OP5V
EGSO, SBSY, SDIR, EGIRN
X02
X'tal (System)
X'tal (USB)
X'tal (Video)
25.0000 MHz
48.0000 MHz
X03
X01
YC04
YC07
Parallel I/F
30.2394 MHz
Engine I/F
Option I/F
CXIN
VXIN
VXOUT
U2
U16
48MHZIN
PNSELIN
PNSTROBE, PNAUTOFD,
PNNIT
PNACK, PBUSY, PPERROR
PSELECT, PFAULT
PPDATA7-0
YC05
PDATA7-0
NSELIN
PDATA7-0
Option serial I/F
P1284DIR
DTR, RTS, TXD
CTS, DSR, RXD
RSSEL
YC09
DBTXD
DBRXD, DBCLK
[Debugger connector]
YC10
TDO
TDI, TCK, TMS, HALTN
RISC watch connector
U13
3.3 V Regulator
+5 V1
+3.3 V1
SDRAM Data bus
SDD31-0
SDD15-0
SDD31-16
SDCSN1-2
SDA12-0
SDCLK
SDCLK
SDD31-0
SDA12-0
SDA12-0
SDRAM Address bus
YS02
Option
SDRAM
DIMM
Slot
U11
IIC
EEPROM
IICSCL
IICSDA
SDA12-0
SDCSN0
SDCSN0
DQMLM, DQMLL
DQMUU, DQMUM
RASN, CASN, WEN, BA1, BA0, SDCLKE
OPRSTN
OPRDY, DMAACKN, IORN,
IOWN, EBCSN4
DMAREQ, OPACKN, OPIRN
EBA15-1
YC01
Option I/F
KUIO-LV (3.3 V)
EBD31-16
EBD31-0
U04
API ROM
Socket
EBD31-16
EBD31-16
EBD31-0
U03
Font
Mask ROM
EBA21-1
EBA21-1
EBCSN1, EBOEN2
EBCSN0, EBOEN2
EBA22-2
EBA21-20
EBCSN0, EBCSN1, EBOEN0, EBWEN0
YS01
System
DIMM
Slot 1
(Code ROM)
SDRAM
U09
SDRAM
U10
YC02
Option
Memory
card
slot
EDB31-16
YC03
U5
Option
Hard
disk
dirive
slot
CPU
U01
74HC
08
CDD7-0
EDB23-16
U6
PowerPC 200 MHz
RISC processor
(Core ASIC)
Содержание Mita FS-1900
Страница 1: ...SERVICE MANUAL Published in Dec 01 Revision 1 1 Laser printer...
Страница 9: ...Chapter 1 P r o d u c t I n f o r m a t i o n...
Страница 27: ...Chapter 2 Installation Operation...
Страница 53: ...Chapter 3 Maintenance Adjustments...
Страница 76: ...Chapter 4 O p e r a t i o n O v e r v i e w...
Страница 114: ...Chapter 5 D i s a s s e m b l y...
Страница 144: ...FS 1900 5 31 8 Remove two screws 9 9 Split the fuser unit 0 Figure 5 2 28 Splitting the fuser unit 9 0 9...
Страница 151: ...Chapter 6 T r o u b l e s h o o t i n g...
Страница 198: ...Appendix A D i a g r a m s...
Страница 208: ...Appendix B S t a t u s P a g e...
Страница 215: ...Appendix C I n t e r f a c e...