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The rules should oblige the seller to give the purchaser an operating instrucion of 3Com 3CB9EF, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of 3Com 3CB9EF one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of 3Com 3CB9EF. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of 3Com 3CB9EF should contain:
- informations concerning technical data of 3Com 3CB9EF
- name of the manufacturer and a year of construction of the 3Com 3CB9EF item
- rules of operation, control and maintenance of the 3Com 3CB9EF item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of 3Com 3CB9EF alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of 3Com 3CB9EF, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the 3Com service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of 3Com 3CB9EF.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the 3Com 3CB9EF item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
Chassis Fan Tray Removal and Replacement Guide For th e Switch 4007 R 8 -Slot Chas sis This gu ide descri bes how to r emove and in stall a fan tray (Model Numbe r 3CB9E F) for the S witch 40 07R 8-slot chas sis. WARNING: The Switch 40 07R fan tray must be ins talled and removed only by trai ned servic e personne l. Y ou can i nstall a ne w fan tra[...]
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2 Chas sis Fan Tr ay Remo val and Replac emen t Guide Figure 1 Loca tion of Fan Trays in the Rear of the Switch 4007R 8 -slo t Chassis There are no us er-s erviceable pa rts on the fan trays. If these compone nts fail, remo ve them a s described i n this do cument and return th e compone nts to your supplie r . Keep replace ment fan trays at your s[...]
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Chassis Fan Tray Remo val and Re plac ement Gu ide 3 Remov ing a Fa n T ray T o remove a fan tray fr om th e Switch 4 007R 8-slot chassis, f ollo w these steps: 1 Using a fl at-blade screwdriver , loosen the six spri ng-loa ded screws that attach the fan tray to the rear of the chassis ( Figure 2). Figure 2 Loca tion of the Six F an Tray Spring-loa[...]
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4 Chas sis Fan Tr ay Remo val and Repl aceme nt Guide Figure 3 Re moving the Fan T ray Using the Handles CAUTION: Before you completely re move the fa n tray , wait until all th e fans in the fa n tray stop rotatin g. 3 Carefully pu ll the fan tray straig ht o ut from the chas sis, making su re that you do not dama ge the con necto r and guide pin [...]
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Chassis Fan Tray Remo val and Re plac ement Gu ide 5 Install ing Y ou can insta ll a ne w fan tra y in yo ur Switch 4007R chassis while the power is on (which is referr ed to a s hot swappi ng ). T o i nstall a new fan tray: 1 Grasp the two handles on the fa n tray a nd then fa ce the r ear of the chassis. 2 Locate the guide pin and conne ctor on t[...]
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6 Chas sis Fan Tr ay Remo val and Repl aceme nt Guide Figure 5 Installing the Fan T ray into the Chassis Using the Handles 4 Align the fa n tray connector and the backplan e connecto r . 5 Use the gu ide pin on the fan tr ay and the gu ide pin holes on the backpla ne of the chassis an d gently push the fan tray inwa rd until th e fan tray connector[...]
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Chassis Fan Tray Remo val and Re plac ement Gu ide 7 Opera ting Gu ideline s Follow these op erating guidelines for the f an trays for the Switch 40 07R 8-slot chassis. CAUTION: For the module b ay area a nd the power su pply bay a rea, i f a fan in o ne fan tray fai ls, a trap messa ge alerts you to replace the fan tray within 48 hours. For t he p[...]
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8 Chas sis Fan Tr ay Remo val and Repl aceme nt Guide 3Com Corporation L IMI TED W ARRANTY Fan T ray (Mode l Number 3CB9EF ) for the Swit ch 4007R 8-slot Chassis H AR DWAR E 3Co m warra nts t o the end u ser (“Custom er”) tha t this har d ware prod uct will b e free from defects in workmans hip and material s, under no rmal use and se rvice, fo[...]
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ARE EXPRESSLY DISCLAIMED . 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PER SON TO ASSUME FOR IT A NY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAINTE NANCE, OR USE OF ITS PRODUCTS. 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT OR MALFUNCTION IN THE PRODUCT DOES NOT EX[...]
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limitation of incidental or consequential damages for certain products supplied to consumers, or the limitation of liability for personal injury, so the above limitations a nd exclusions may be limited in t heir application to you. When the implied warranties are not allowed to be excluded in their entirety, they will be limited to the duration of [...]
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Chassis Fan Tray Remo val and Re plac ement Gu ide 11 G ENERAL A PPROVAL S TATEME NT FOR UK UK G enera l Appr oval Sta tement This eq uipme nt is ma nufa cture d to t he international Safety Standard EN60950 and is approved in the UK under the Gener al Approv al Number NS /G/12 345/J/100 003 for in direct connecti on to the p ublic telecomm unicat [...]
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Page 12
12 Chas sis Fan Tr ay Remo val and Repl aceme nt Guide[...]