Printronix P9012 Maintenance Manual page 37

Multifunction line printer
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MCU PCBA (Slot 4)
P7
TP3 (PPR BUSY)
TP4 (SDIR)
P8
TP1 (+5VDC)
TP2 (GND)
Figure 2–14. Mechanism Control Unit (MCU) PCBA
Principles of Operation
2–19

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