Canon LBP-1210 Service Manual page 109

CHAPTER 2
This signal is sent to the engine controller from the BD sensor on the laser driver PCB through
the intermediate PCB. Refer to "IV. LASER/SCANNER SYSTEM" for more details.
• /VDO / VDO (video) signals
These are differential signals output from the interface controller to the laser driver PCB through
the intermediate PCB. The signals are image information to be printed by the printer engine;
they turn laser ON and OFF.
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