2A3/4
2-3-7
The following is a description of memory copy PCB 1 (MCPCB1). Memory copy PCB 2
(MCPCB2) is identical to memory copy PCB 1 (MCPCB1).
Memory copy PCB 1 (MCPCB1) consists of CPU U17, ASIC U16, SRAMs U4 and U11,
DRAMs U13, U14, U15, U18, U19 and U20, EPROM U1, and CODECs U25 and U26.
The memory copy PCB mainly serves to read images from the scanner based on the
control signals from the main PCB (MPCB), and output the images to the engine (the
component where printing to paper and driving of mechanisms are executed). It also
performs editing operations such as image rotation, image summary and image
synthesizing.
Since the original scanning speed of the scanner and the printing speed of the engine
(the component where printing to paper and driving of mechanisms are executed) are
different, and their operations not synchronized, memory copy PCB 1 (MCPCB1) also
serves as a buffer to deal with the speed and timing differences between them.
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 ...