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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Dual XD1228, 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.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Dual XD1228 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 Dual XD1228. 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 Dual XD1228 should contain:
- informations concerning technical data of Dual XD1228
- name of the manufacturer and a year of construction of the Dual XD1228 item
- rules of operation, control and maintenance of the Dual XD1228 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 Dual XD1228 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 Dual XD1228, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Dual 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 Dual XD1228.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Dual XD1228 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
AM/FM/CD Receiver XD1228 Charge Port INSTALLATION/OWNER'S MANUAL[...]
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Page 2
2 XD1228 INSTALLATION Preparation Removal Keys Mounting Sleeve Dashboard or Mounting Ki t Head Unit TYPICAL MOUNTING METHOD Please read entire manual before installation. Before You Start • Disconnectnegative battery terminal. Consulta qualified technician forinstructions. • Avoidinstallin[...]
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Page 3
3 XD1228 INSTALLATION Rear Preamp Output Connect to amplifier RCA input Antenna Connector RCA Cable (sold separately) AMP BLUE BLACK RED YELLOW Remote Turn-On Connect to amplifier or power antenna. Insulate wire if not used. Ground Connect to vehicle chassis ground. Accessory Connect to ignition circuit or switched 12 volt source. Memory Connec[...]
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Page 4
4 XD1228 OPERATION Control Locations Release Volume Knob Mute/ Power Tune/ Track Down Tune/ Track Up Source Eject USBCharging Port AuxiliaryInput 1 2 3 4 5 6 7 8 9 Preset 6 Preset 5 Preset4 / Play/ Pause Preset3 / Intro Preset 2 / Random Preset1 / Repeat Band Display Audio [...]
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Page 5
5 XD1228 OPERATION General Operation Press RELEASE and pull awayfrom the left sideto remove. Tore-install, insert right sideof faceplate first thenpush left side to secure. Removetrim ring and installsupplied #1 x 7/32”Phillips headscrew thr[...]
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Page 6
6 XD1228 OPERATION Insertthe USB connector ofa battery powered USBdevice intothe USB charging porton the front panel,which provides5 volts DC and1.0 amps. The USBdevice will immediatelybegin charging. Note: The USB charging portmay?[...]
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Page 7
7 XD1228 OPERATION Audio Operation Press AUDIO until BAS appears Rotatethe volume knob left/rightto adjust (-6minimum / 6 maximum) Press AUDIO until TRE appears Rotatethe volume knob left/rightto adjust (-6minimum / 6 maximum) Press AUDIO until BAL ap[...]
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Page 8
8 XD1228 OPERATION CD Player Operation Withthe label facing up,insert a standard sizeCD into the CDslot. The CD willautomatically begin playback. Pressthe EJECT button tostop and eject theCD. Theunit will change totuner mode. Pr[...]
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Page 9
9 XD1228 OPERATION Troubleshooting Error Codes Problem Cause Action Unit will not turn on (no power) Yellowwire notconnected or incorrectvoltage Redwire notconnected or incorrectvoltage Checkconnections forproper voltage (11~16VDC) Blackwire notconnected Check?[...]
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Page 10
10 XD1228 OPERATION Limited One Year Warranty Thiswarranty gives you specific legal rights.You may also have other rights whichvary from state to state. DualElectronics Corp. warrants this productto the original purchaser to befree from?[...]
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Page 11
11 XD1228 OPERATION FCC Compliance Thisdevice complies with Part15 of the FCCRules. Operation is subjectto the following twoconditions: (1)this device may notcause harmful interference, and (2)this device must acceptany interference received[...]
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Page 12
Specifications Frequencyresponse: 20Hz-20kHz Channelseparation @ 1kHz: >65dB D/Aconverter: 1 Bit Tuningrange: 87.5MHz-107.9MHz Usablesensitivity: 12dBf 50dBquieting sensitivity: 16dBf Stereoseparation @ 1kHz: 40dB Frequencyresponse: 30Hz-13kHz Tu[...]