Interface Control - OKIDATA Pacemark 3410 Service Manual
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Also See for Pacemark 3410:
- Service handbook (308 pages) ,
- User manual (273 pages) ,
- Instruction manual (9 pages)
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Page: 17
Service Guide PM3410
Chapter 2 Principles of Operation
2.1.04 Interface Control
The printer is capable of serial or parallel operation. The desired interface method is selected by sliding
the interface cover to expose the desired connector. When this is done, the interface select switch is
turned ON or OFF to inform the Interface/Motor Control LSI (Q5: B562 13497) of the selected interface.
Parallel Interface
When the interface select switch is turned OFF, the parallel interface is selected and Q5 is in the parallel
interface mode.
The data from the interface is received through connector (CN-1) and Q5 latches this data in sync with the
STB signal.
The BUSY signal is turned ON as the data is processed. When processing is completed, the BUSY signal
is turned OFF and an ACK signal is sent to the host to request more data.
The BUSY signal is also turned ON when the printer is not able to receive data (the Print Buffer is full, the
printer is deselected or an error condition exists).
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Troubleshooting
