Xerox 3450B Service Manual - Page 41

Image Processor Function

Get Xerox 3450B - Phaser B/W Laser Printer PDF manuals and user guides
UPC - 095205120011
View all Xerox 3450B manuals
Add to My Manuals
Save this manual to your list of manuals

Page 41 highlights

Image Processor Function The host computer connects to the Main Board using a bi-directional parallel or Universal Serial Bus (USB) cable, or via an optional RJ45 Ethernet Network Card. The Main Board receives image data from the host computer and converts the image to a bitmap image. It then sends the current image to the Laser Scanner assembly. ROM 100PI N DI M M 29L V160 16Mbit Flash M emory Mask Font ROM DA T A (16:31) AD DR(1: 23) Regulat or 1.8V RC S( 0 :3 ) 4 Main Board SDRA M 100PI N DI M M M emory Data Bus DRA MD(0:31) 32 M emory Address Bus 64M bit SD RA M K 4S641632C 64M bit SD RA M K 4S641632C DRA MA (0:11) 11 SDRAM _CA S,SDRAM_RAS, BA0*,BA1* ,SDRAM_WE* , SDRAM _CS( 0:1) ,SDQM (0:3) , SD_CLK (1:2) ,CL KE 14 EIRQ(0:3)* 4 nI OCS(0:5)* 6 XC61FN 3112M R RE SET * U SB c loc k 12M H z(OSC) FS781 Fr eq ue nc y Sca lin g E MI A t t en uat o r Sy s tem c l ock 1 2M Hz( X- t al ) n FSYN C VCLK* Vid eo- Clock 78 M Hz A DDR(1:13) nWA I T n WR n RD INT * 3 93 C6 6 4M bit Ser i al EEPR OM DATA(16:31) nWAI T n RD nW R NPC_RE SET I OCS EI RQ NIC Card 6 0 P in N et wo r k Co nn e c t o r Cent ronic s Connec t or Co mputer 74A CT 245 T r ansceiv er A CK* , BU SY, SELE CT , ERROR, FAULT * PD ( 0 :7 ) SELI N* ST ROB E* A UT OFD* INI* 24 H VPS Int er face 12 LREA DY* , ,LSY NC* , V DO* , P_MOT * ,CLK 6 U ART PAN EL 5Pin 16 Laser Power Supply Board L CD Pane l s3450-166 Main Board Wiring Diagram 2-8 Phaser 3450 Laser Printer Service Manual

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
2-8
Phaser 3450 Laser Printer Service Manual
Image Processor Function
The host computer connects to the Main Board using a bi-directional parallel or
Universal Serial Bus (USB) cable, or via an optional RJ45 Ethernet Network Card.
The Main Board receives image data from the host computer and converts the image
to a bitmap image. It then sends the current image to the Laser Scanner assembly.
Main Board Wiring Diagram
ADDR(1:23)
29LV160
16Mbit Flash
Memory
Mask Font ROM
ROM
nFSYNC
ACK*,BUSY,
SEL E CT , ERROR,
FAULT*
SELIN*
ST ROB E*
AUTOFD*
INI*
PD(0:7)
EIRQ(0:3)*
4
nI OCS(0:5)*
6
RCS(0:3)
4
nWAIT
n WR
INT*
n RD
Centronics
Connector
PANEL 5Pin
6
HVPS Interface
24
16
Power Supply Board
100PIN DIMM
L CD Panel
6
0
P
in
N
e
t
w
o
r
k
C
o
n
n
e
c
t
o
r
NIC
Card
DATA(16:31)
nWAIT
n RD
nW R
NPC_RESET
I OCS
EI RQ
Computer
System clock
12MHz(X- tal)
FS781
Frequency
Scaling EMI
Attenuator
RE SET *
XC61FN 3112M R
DATA(16:31)
Video- Clock
78MHz
VCLK*
32
Memory Data Bus
11
Memory Address Bus
14
SDRAM _CA S,SDRAM_RAS,
BA0*,BA1*,SDRAM_WE*,
SDRAM _CS( 0:1) ,SDQM (0:3) ,
SD_CLK (1:2),CL KE
64M bi t SD RA M
K 4S641632C
SDRA M
64M bi t SD RA M
K 4S641632C
DRAMA(0:11)
DRAMD(0:31)
100PIN DIMM
74ACT245
Transceiver
3
Laser
LREADY*,,LSYNC*,VDO*,P_MOT*,CLK
UART
12
Regulator
1.8V
USB clock
12MHz(OSC)
93C66
4Mbit
Serial
EEPROM
ADDR(1:13)
Main
Board
s3450-166