HP MFP M2727 manual Theory of operation

Print quality	64
Paper types	64
System setup	65
Service	65
Device Polling	65
Print settings	65
Printing	65
PCL 5e	66
PostScript	66
Network settings	66
Embedded Web server	66
Features	66
Secure the embedded Web server	67
Macintosh Configure Device (Mac OS X v10.3, v10.4, and later)	67
4 Theory of operation
Basic operation	70
Sequence of operation for the base unit	70
Scanner and ADF functions and operation	72
Scanner functions	72
Scanner operation	73
ADF operation	73
ADF paper path and ADF sensors	74
ADF jam detection	75
Internal components (base unit)	76
Engine control system	78
Laser/scanner system	80
Pickup/feed/delivery system	81
Image-formation system	83
Fax functions and operation	87
Computer and network security features	87
PSTN operation	87
Receive faxes when you hear fax tones	87
Distinctive ring function	88
Fax by using Voice over IP services	88
The fax subsystem	89
Fax card in the fax subsystem	89
Safety isolation	89
Safety-protection circuitry	89
Data path	90
Hook state	90
Downstream device detection	90
Hook switch control	90
Ring detect	91
Line current control	91
Billing- (metering-) tone filters	91
Fax page storage in flash memory	91
Stored fax pages	91
Advantages of flash memory storage	91

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