Brother HL-2600CN Service Manual page 97

(7) Engine interface block
The engine interface consists of the following signals;
<IREADY>
The signal indicating the engine is ready
<PRREQ>
Signal requesting printing from the controller
<KEY_STATUS>
Signal indicating that a key switch status on the control panel has changed.
<VSYNC>
Vertical synchronization signal for printing
<HSYNC>
Horizontal synchronization signal for printing
<VIDEO>
Video data signal
<COMMAND>
Command signal sent from the controller to the engine
<STATUS>
Status signal sent from the engine to the controller
Fig.4-39 shows the timing of each signal after the power switch is turned on.
Power On
210s MAX.
IREADY-N
PRREQ-N
0.1sec. MIN.
15sec. MAX.
VSYNC-N
VIDEO-P
VSYNC-N
15us MIN.
10ms MAX.
HSYNC-N
VIDEO-P
(K) data (C) data
417.781us
1st line 2nd line
Fig.4-38
IV-46
1.0sec. MAX.
3.75s 3.0sec. MAX. for Continuous Printing
(M) data (Y) data
56.296ns
1dot Last line