Canon LBP1760P, Service Manual

Page: 91 / 394

Figure 2-6-3
2 - 53
ASIC
RESET
CPU
FC80960HD-50
LVC541
✕
4
LVC245
✕
4
LVC245
✕
2
Resident ROM
ROM DIMM
ROM DIMM
Extension I/O Extension I/O
LVC541
✕
2 LVC541
✕
1
RAM DIMM
RAM 4MB
LVC245
✕
4 LVC541
✕
3
<J2>
Engine
LVC541
✕
2
AIR
X´TAL
(13.2174MHz)
Buffer
IEEE1284
3.3V • 5V
OSC.
(50.00MHz)
EEPROM
<J1>
<J6>
<J7/8> <J4/5>
5V (E)
3.3V 5V
5V Direction
nCVDO
nLYNC
nVCLK
ROM Cont.
ENGINE I/F (5V)
RAMA [10:0]
RAMD [31:0]
I/O Cont.
RAS, CAS, WE
CPUCLK
(25.00MHz)
A/D [31:0]
CPUA [23:2]
CPUD [31:0]
5V (E)
3.3V
LA [23:2]
(72pin, 1slot)
for Option
(72pin, 2slots)
for job Separator
(50pin, JSIO)
for Network Board
(50pin, PSIO)
IOA [17:2]
5.0V
AIRA
[6:2]
AIRD
[1
1:0]
nRESET
PANEL I/F
VDO
BD
ENGINE I/F (3.3V)
for Option
(72pin, 2slots)
<J3>
Adapter PCB
3.3V
5V (E)
Video Controller PCB Block Diagram