HP 2100 Service Manual - Page 79
Power On Sequence, paper
UPC - 873662008284
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Page 79 highlights
Power On Sequence The sequence from power on until the printer enters the STBY period is as follows: 1 Power on. 2 CPU initialization. 3 Video interface communication start. 4 Fusing heater drive. 5 Main motor and fan drive. Determines the paper detection status of each sensor in the printer immediately before driving the main motor, and assesses a paper jam if residual paper is detected. 6 High voltage control. Determines whether or not the toner cartridge is installed, and if so cleans the transfer charging roller after the primary charging AC bias is turned on. 7 Residual paper check. After starting the main motor, checks again for residual paper in the printer. If it finds paper, the printer assesses a paper jam or automatically delivers the residual paper according to the situation. 8 Failure/abnormality check. In the steps above, the printer detects any door open condition, fan motor failure, or fusing assembly failure when they occur. C4170-90959 Sequence of Operation 69