Canon MultiPASS C755 Service Manual - Page 32
Electrical Layout, supplies power to the units and assemblies
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MultiPASS C755 Chapter 2: Assembly and Disassembly The electrical parts are laid out as follows. • SCNT board system control • PCNT board printer control • NCU board interface with telephone line • Power supply unit supplies power to the units and assemblies • OPCNT board detects keyboard operation and displays machine information • 7 sensors detect unit and assembly statuses Cover sensor: Detects the state of printer cover. Pickup roller sensor: Detects the state of pickup roller. Ink detect sensor: Detects that there is no ink in the ink chamber (Reflection-type sensor). Document edge sensor: Detects the trailing edge of the document. Paper edge sensor: Detects the state of paper feeding and delivery. Home position sensor: Detects the carriage position and purge unit status. Document sensor: Detects whether or not a document is set. PCNT board OPCNT board Power supply unit SCNT board Figure 2-3 Electrical Layout 2-5 NCU board