Operation Of Circuit Boards; Main Board - Kyocera FS-1900 Service Manual

4-3-2 Operation of circuit boards

(1) Main board

Engine I/F
YC07
FPCLK
FPDIR
FPDAT
RESETN
VDEONSPI
PDN
VDATAP, VDATAN
EGSI, SCKN
EGSO, SBSY, SDIR, EGIRN
SCK, SO, SEL(0-2)
SLREADY
OP24V, OP5V
Option I/F
YC08
X02
X'tal (System)
25.0000 MHz
X03
VXIN
X'tal (Video)
VXOUT
30.2394 MHz
X01
X'tal (USB)
48.0000 MHz
YC04
Parallel I/F
PNSELIN
PNSTROBE, PNAUTOFD,
PNNIT
PNACK, PBUSY, PPERROR
PSELECT, PFAULT
PPDATA7-0
Option serial I/F
YC05
DTR, RTS, TXD
CTS, DSR, RXD
RSSEL
RISC watch connector
YC10
TDO
TDI, TCK, TMS, HALTN
[Debugger connector]
YC09
DBTXD
DBRXD, DBCLK
U13
3.3 V Regulator
+5 V1
FS-1900
CPU
U01
PowerPC 200 MHz
RISC processor
U16
(Core ASIC)
CXIN
U2
48MHZIN
PDATA7-0
NSELIN
PDATA7-0
P1284DIR
+3.3 V1
Figure 4-3-4 Main board circuit block diagram
Q01
Digital Transistor
USBINT
USBDP
USBDN
VBUS
Q02
Digital Transistor
EBA22, EBA10-1
EBOEN1, EBWEN1
CDET11, CDET12, CDRST1
EBCSN2
EBWEN3
74LV
EBA21-20
32A
EBA22, EBA10-1
CDET21, CDRST2
CDCSN1
CDWAITN
74HC
CDCSN2
08
EBA22-2
EBCSN0, EBCSN1, EBOEN0, EBWEN0
EBCSN0, EBOEN2
EBA21-1
EBA21-1
EBCSN1, EBOEN2
OPRSTN
OPRDY, DMAACKN, IORN,
IOWN, EBCSN4
DMAREQ, OPACKN, OPIRN
EBA15-1
EBIU Address bus
DQMLM, DQMLL
DQMUU, DQMUM
RASN, CASN, WEN, BA1, BA0, SDCLKE
IICSCL
IICSDA
SDRAM Address bus
SDCSN0
SDA12-0 U09
SDRAM
SDCSN0
U10
SDRAM
SDA12-0
SDCSN1-2
SDRAM Data bus
SDD31-0
4-26
YC06
YC02
CDD15-8
Option
Memory
CDCSN1
card CDD7-0
CDCSN2
slot
YC03
Option
Hard EDB31-16
disk
dirive
slot
YS01
System
DIMM
Slot 1
(Code ROM)
U03
Font
Mask ROM
U04
API ROM
Socket
YC01
Option I/F
KUIO-LV (3.3 V)
EBD31-16
EBIU Data bus
SDA12-0
SDD31-16
SDA12-0
SDD31-0
SDCLK
SDD15-0
SDCLK
USB I/F
U5
EDB31-24
U6
EDB23-16
EBD31-0
EBD31-16
EBD31-16
EBD31-0
U11
IIC
EEPROM
YS02
Option
SDRAM
DIMM
Slot