2A3/4
2-3-6
2-3-4 Memory copy PCB
Communication
control interface
Image input
interface
Image output
interface
Clock frequency
24.39 MHz
Address bus
Address bus
Address bus
Data bus
Data bus
Data bus
DRAMs
U13, 14, 15,
18, 19, 20
Sort
memory
ASIC
U16
FF
CPU
U17
CODEC
U26
CODEC
U25
SRAM
U4,11
EPROM
U1
Clock frequency
31.8 MHz
Clock frequency
39.86 MHz
Clock frequency
3.6864 MHz
Figure 2-3-4 Memory copy PCB 1 block diagram
Summary of Contents for Ri 4230
Page 3: ...SERVICE MANUAL Ri 4230 5230 ...
Page 13: ...4230 5230 S M MCA THEORY AND CONSTRUCTION SECTION I I Theory and Construction Section ...
Page 14: ...1 1 5 2A3 4 CONTENTS 1 1 Specifications 1 1 1 Specifications 1 1 1 ...
Page 100: ...4230 5230 S M MCA ELECTRICAL SECTION II II Electrical Section ...
Page 119: ......
Page 138: ......
Page 159: ...4230 5230 S M MCA III Set Up and Adjustment Section III SET UP AND ADJUSTMENT SECTION ...
Page 448: ...2A3 4 3 6 3 25 Toner scatters at the leading edge of the image See page 3 6 17 ...