维修资料2（Maintenance data 2）.docVIP

维修资料2（Maintenance data 2） Maintenance data (two) Add time: 2007-08-28 5. The main technical specifications of facsimile machines (1) applicability: G1, G2, G3 and G4 indicate different groups. The higher the number is, the higher the group is compatible with the low group of fax machines, and now generally G3. (2) scanning mode: mainly CCD and CIS, CCD is photoelectric coupling sensor, belong to analog type, CIS contact type image sensor, belongs to digital. So CIS scans more clearly and faster than CCD. (3) resolution: DPI, that is, per square inch, such as 360 * 360DPI, 720 * 720DPI. (4) ECM: it is an error correction protocol, which ensures that the documents are correct. (5) image processing: if UHQ is an intermediate color transition mode, it can ensure better picture transmission effect. (6) scanning speed: divided into the main and secondary two scanning speed, the number of times per unit time to scan the image or distance. The speed at which paper travels is usually recorded. (7) effective scanning / recording width: the width of fax paper, divided into A4, B4, A3 and so on. (8) send time: send 1 page international standard proof time required, the shorter the better, usually between 6 to 45 seconds, which belongs to the high-end facsimile machine under 9 seconds. (9) output / input level: in the proper range, the fax machine can work correctly and guarantee the quality of transmission. Two, fax machine purchase common sense As a modern office equipment, fax machine has been widely used in office and home. How to choose an economical and practical model? Buy fax machines on demand. The development of computers, fax machines and telecommunications has made it possible to work from home. How can I buy my fax machine? This requires buyers to balance as needed. First, make sure the fax machine is ready to play a big role. There are many differences in the functional design between home fax machines and office fax machines, and the price differences are quite la