MINOLTA-QMS PagePro 4100 Series, Service Manual

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2
GENERAL
INF
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RM
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T
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2-10-2. Description of Signals
Signals Meaning of Signals
/CPRDY This signal indicates that the Controller is ready for communication
with the Engine following initialization of the CPU in the Controller
after the main power is turned on. The signal becomes active when
communication is enabled.
/CTBSY This signal indicates that the Video Controller is currently transmitting
the -CMD signal to the Mechanical Controller.
/PRINT This signal is the request by the Controller to the Engine, to start or
continue printing. The signal becomes active when the Controller
completes preparation of the image output.
/CMD This is an 8 bit signal used by the Controller to control Engine
operation. The type of operation is defined by the combination of 8
bits.
/STS This is an 8 bit signal used by the Engine to inform the Controller of
the current status of the Engine.
/SRCLK This signal is a serial synchronization clock for transmitting the -CMD
and -STS signals.
/RESET This signal is sent from the Controller to the Engine and initializes the
Engine (resets the CPU).
/EPRDY This signal indicates that the Engine is ready for communication with
the Controller following initialization of the CPU in the Engine after
the main power is turned on. The signal becomes active when
communication is enabled.
/PRRDY This signal tells the Controller whether or not printing is possible. The
signal is inactive when there is a jam, the Fusing Roller is still
warming up, etc.
/ETBSY This signal indicates that the Engine is currently transmitting the -STS
signal to the Controller.
/HSYNC This is the horizontal (main scanning direction) synchronization signal
which obtains the print start timing of each line during laser scanning.
The signal is active during the period that the laser beam strikes the
SOS sensor for each scan of the laser beam.
/VIDEO This signal is an image data signal and is transmitted from the
Controller to the Engine.