Brother HL-3450CN Service Manual page 96

(4) Interface Control
<General>
(a) Interface Type
The video interface handles laser image data that corresponds to dots for printing but
does not store image data in a buffer. The video data signals of the input image data
switches the semiconductor laser diode to form a print image.
(b) Interface Connection
Operator
Panel
Duplex unit
(Option)
Lower Tray(1)
Unit (Option)
LowerTray(2)
Unit (Option)
The interface connector of this laser printer is connected to the host system as shown
in Fig.4-37.
Video Interface /
DC Power Supply Connector
Printer
Engine
Controller
[Customer design]
DC Power Supply
Fig. 4-37
4-43
Laser Printer
Controller
Host
(LPC)
System
HL-3450CN SERVICE MANUAL