QA350 Player User Manual
Contents
1. 1 one to the gg 3 bit number rapidly set music from the 100 one to the 999 Key A press the number keys and 2 3 number keys to select the folder Key B useless The previous music choose the previous music same with the previous music key in the host The next music choose the next music same with the next music key in the host The previous folder if there is it will turn to the previous folder of the current folder If the current folder is the first one it will out of the foler operations The next folder if there is it will turn to the next folder of the current folder Play pause start playing or pause playing same with the play pause key in the host Page 3 Player usage Insert the prepared SD card connect the headset and adjust the volume VR to the appropriate volume When first using it is better to adjust the sound volume to the minimum Power on and switch on the supply power then the player will firstly self test and LCD will display message QA 350 start in lines if SD card format isn t correct it shows NO CARD if there is no valid source of sound file in SD card it shows NO MUSIC And if self test finishes it will show message SUM XXX ready and wait for the next orders When it plays LCD shows file name lines When it pauses LCD shows message file name the play pause keys again its pause directly ends If the player cannot be booted or when LCD displ2. 44 1K SPDIF PCM digital output LINE OUT output by the DAC and LVP after the analog signal can directly connect to your amplifiers or amp Volume Regulation VR adjust the volume level of the output signal of the amp Headphone jack connect headphones Remote interface Interface reserved Standby it lights when displayer is in standby state Power switch ON OFF controlling the whole power Power 9V 12V DC Power supply input Maximum current provided by the power has better exceed or equal 500mA Battery Charging Interface use charger through the built in interface to charge the battery For charging method please see related introduction Key Lock Switch to prevent the keys being misuse when it is in the state of ON press the button to lock it on the contrary it is also operational SD socket where SD card insertde Remote user s manual _ standby reset 2 bit number 0 3 bit number PREV iii l next PREV folder play pause PE a ae rA i i Bs y E on te pat I eg iS next folder i is s i i s T i Functions of each key Host standby press this key the host player will enter a standby state Press it again the host will start normal working from standby mode Host reset if press it the host will reset and start working again Number keys 0 9 work together with other keys to select music or something else 2 bit number rapidly set music from the
3. QA 350 WAV high fidelity music player user manual Welcome to use QA 350 WAV high fidelity music player Please spend several minutes to read this user manual before preparing using it QA350 is a WAV high fidelity music player designed and made by QLS Electronics SD card is applied as storage medium while lossless WAV format as the sound source The player integrates DAC and headphone Amplifier circuit with the built in high capacity rechargeable lithium polymer battery It is convenient to carry with and play music Meanwhile the player is designed have RCA coaxial output and optical output to facilitate the QA350 to be a pure digital sound source QA350 is also have analog signal output which can be directly connected to amplifier or preamp etc Caution of using lithium polymer battery 1 non equilibrium charger is prohibited which may cause lithium batteries damage smoking heated or burned 2 over discharge over charge or reverse charge will immediately lead to lithium damage The over charged state when the batteries are left aside for long time will be presented by its self discharge characteristics In order to prevent over discharge the battery shall be charged periodically at least one time in a month or else lithium batteries may be damaged because of over discharge 3 batteries or the player shall be put in the clean dry and ventilated places with the relative humidity less than 75 Storage should avoid the short circuit do
4. ays battery LOW please charge first before using it When in normal operation you can use the Back Light Button to turn on off LCD backlight current number the total file numbers in PAUSE in lines And if press Choose music 1 when automatically playing it will automatically start from the first track for replay when the final track is completed 2 If press previous next music it will turn to the previous the next music and automatically play But if it plays the first one previous music key is invalid if the last one next music key invalid if it automatically plays the last one it will turn back to the first one to play 3 If press numbers 1 9 it will directly play the corresponding music It s invalid to press O key it s valid if what you press exceeds the sum 4 If press __ _ or _ _ _ to choose music LCD shows current file name _ _ or current file name in lines If input music number it will play that music directly If the number is beyond the sum of files it is considered as invalid and makes no response 5 Press F or F to choose music in folders If press F it turns to the next folder to play And F is invalid when it comes to the last folder If press F it turns to the previous folder to play when it comes to the first folder t will out of the foler operations and play form the first music 6 Press A and within 5 seconds press numbers1 9 directly or press _ _ followe
5. d by press number key to select the appropriate folder If more than 5 seconds after pressing A key the input number that is used to select the file 7 after selecting the folder the above described methods are based on operations within selected folder For example enter the number 9 and then the 9th track is selected 99 within the folder rather than the 9th track in the entire SD card How to firmware update 1 Firstly format 1G 2G SD card in order to update 2 Download update files from our website http www gqlshifi com en Download htm and save them on your local hard disk Decompress such files extract the following qls file and save it to the SD card root directory Note that file name can t be amended only can have this a qls file in your SD card root directory Please delete it If have other qls file 3 Plug SD card press on update key SWI and turn on the power supply Then LCD shows update start and the player will automatically find relevant files If you don t insert the card or it fails to find update files LCD will show NO CARD or no file After finish the update LCD shows update ok Thank you for your use If you have any other questions or feedback welcome to contact us http www qlshifi com en lxfs_e htm Page 4
6. d to the battery voltage 1 when the battery voltage is below the protection threshold value the host will automatically turn the power off if now the external power is applied first the power is turned off before turn up the player again Page l 2 in the process of battery powering when the battery voltage drops to the protection threshold value it will automatically cut off the button input and remote control input as well as the out LCD shall display Battery LOW for user s attention to charge 3 1f the power has been disconnected in time or charged when the battery voltage falls below the protection threshold value all power consumption modules will automatically be cut off except the control module to protect the battery from damage BATTERY CHARGE Charger Charging method the charger cable connects the host to the charger which can achieve the battery charging The charging time is about 1 5 3 hours When all indicating lights on the charger turn from red to blue it indicates the completion of charging Two lights is red When Charging Product function block diagram 1 positive 1 play pause Il 2 PREV lt lt 3 NEXT b 4 PREV folder q 5 next folder p LCD DISPLAY backlight REMOTE RECEIVER 2 left Line OPT SO Headphone O Remote Volume Stand a 3 right 1 Lock key 2 Power switch 3 Power 4 Charge 5 SD socket Functions of each module are as fol
7. lows LCD display relevant information is synchronous displayed as follows 1 in the upgrade process whether the SD card is detected whether the card owns upgrade file and whether the upgrade is complete shall be displayed 2 power initialization shows whether the SD card is detected whether the card contains music files and finally indicates the system is ready 3 in normal playback it displays the file name of current playing track and the location in music file system 4 displays play pause status 5 when the folders are in operation it displays folder names and total number of tracks in folders 6 when the battery voltage is low it displays the battery voltage is low to remind the charge Backlight buttons on off LCD backlight Meanwhile serves as the automatic start button of upgrade operations Page 2 Remote remote receive window serves as receiver of controlling signals from remote Play pause start playing or pause current playing The previous music turns to play the previous music If it is the first one this operation is invalid Next music turns to play next music If it is the last one this operation is invalid The previous folder if there is it will turn to the previous folder of the current folder While current folder is the first one it can over the folder operating The next folder if there is 1t will turn to the next folder of the current folder Coaxial out optical out 16Bit
8. not place the battery near a heat source or prolonged exposure to sunlight Temperature rise will shorten battery life 4 in order to avoid over discharged damage to the battery please ensure that the power switch is at OFF when the player is not used Even if the battery is used to the automatic shutdown the power switch should certainly be pulled to the OFF position 5 for the safety of user and the property when charging the batteries please ensure that someone is at the site Do not charge when no one is at home or sleeping at night 6 Prevent falls shocks and bending batteries against fires 7 imany case the battery shell cannot be dismantled or else the inner short circuit can be caused leading to bump and fire 8 itis prohibited that the direct connection of short circuit of the battery positive and negative poles It may result in serious damage to the battery or even fire 9 strictly prohibited to throw battery in fire or liquids to avoid danger 10 strictly prohibited to charger in the car 11 in order to avoid adverse consequences caused by the battery abnormal use please do not put lithium batteries or the player to places within reach of children Main Features of QA350 Player High accuracy crystal clock 2ppm TCXO crystal to ensure the best sound quality Support 16ohm 300ohm headphones Optical and Coaxial digital output and LINE OUT output Headphone Amp output Support two control methods bu
9. ttons and remote buttons can be locked Support two power supply methods the battery and external DC power supply O0802LCD synchronous display Backlight controllable Support firmware upgrade Each module independent LDO offer power supply The player works more stable with less power noise Real time monitoring of battery voltage When the battery voltage is low output is automatically shut down Sound Source File Files are put in order by the number alphabet ascending order Files in the root directory come in front of all the files in all folders folder are put in order by the number alphabet ascending order too which include 1 All the files in the root directory come before the first folder 2 Folders are put in the same order 3 files in each folder is put in the same order SD card format FAT32 format less than equal to 16G SD SDHC Power l an external 9V 12V linear power supply is applied Polarity requirements are positive is inside and the negative is outside 2 7 4 V built in lithium battery When an external power supply and the lithium battery are applied at the same time the power supply of higher voltage is automatically selected when charging the battery an external power supply can be applied When using battery power it is recommended that you turn off the LCD backlight to save battery power Battery protection In the work process the real time monitoring will be applie
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