Service manual

iii IP-421 PRINT CONTROLLER
Contents
CONTENTS
1. Overview
■ Product specifications ...............................................................................................1-1
● IP-421 print controller ...................................................................................................................... 1-1
■ Product overview ...................................................................................................... 1-3
● Capabilities of the IP-421 ................................................................................................................ 1-3
● Startup sequence of the 7020 series + IP-421 system .................................................................... 1-4
● Data processing of the IP-421 (See data flow) ................................................................................ 1-4
● Data flow ......................................................................................................................................... 1-5
■ Option ....................................................................................................................... 1-6
● KN-303 Network card ...................................................................................................................... 1-6
● Hard Disk (HD-103)......................................................................................................................... 1-6
● Post Script 3 (PS-341)..................................................................................................................... 1-6
2. Disassembly/Assembly
■ Construction .............................................................................................................2-1
■ Disassembly / Assembly procedures ........................................................................2-2
● Removal/Installation of boards ........................................................................................................ 2-2
● Expanding the memory (MU-403/MU-404/MU-405) ........................................................................ 2-5
● Installation / Removal of HD-103 ..................................................................................................... 2-7
● Installation / Removal of PostScript 3 option (PS-341) .................................................................... 2-9
3. Troubleshooting
■ Troubleshooting ........................................................................................................3-1
● Troubleshooting of the IP-421 and copier ....................................................................................... 3-1
4. Appendices
■ Upgrading the Firmware ........................................................................................... 4-1
● Rewriting the Flash ROM ................................................................................................................ 4-1
● In case of failure in rewriting the firmware ....................................................................................... 4-2
● Replacing ROM ............................................................................................................................... 4-3
■ Functions of parts mounted on boards......................................................................4-4
● Connector ....................................................................................................................................... 4-5
● Switch ............................................................................................................................................. 4-5
● Jumpers .......................................................................................................................................... 4-5
● Individual ICs’ functions................................................................................................................... 4-5
INDEX ................................................................................................................... Index-1
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