K+H KPA 2290 Operating Manual
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Klein + HummelOperating Manual KPA Series English 12■ Setup and settingsIntroductionThefigure 9 below shows the front panel of KPA Series. The front panel controls, in conjunction with the graphicLCD display above the buttons, give to the user the total control and detailed information about the status of theamplifier. Each pushbutton has multiple functions and the display shows the current active function for eachbutton.Read carefully the instructions below that help you to manage the functions of the amplifier.-1Signal-2-3-6-10Clip-1Signal-2-3-6-10ClipK A B C D E F G H J IA V/I-meter channel no 1 G Graphic LCD displayB Smartcard reader H V/I meter channel no 2C Function button no 1 I Power switchD Function button no 2 J Title blockE Function button no 3 K Panel unlockingF Function button no 4figure 9The main screenThefigure 10 show the main screen; this screen appears after a short presentation when the user powers on theamplifier. In the first line, after power on, the writing "WAIT" appears; if the system parameters are normal, thewriting are replaced with "READY". During the normal operation the controller monitors the system parameters. If aparameter is out of range, the correspondent code error is written on the LCD meter of the relative channel in thethird line; if the abnormal parameter is associated to both channel, the error code is written in the centre.figure 10The LED bars can function as output voltage or output current meters; in the first case the LCD meters function asoutput current meter, vice versa in the second case. The first green LED at the bottom side of the LED bar indicates,when lighted, the presence of input audio signal above -60 dBV on the corresponding channel; the 2nd, 3 rd , 4 th and5 th LED in the ascending order indicates an output level of -3dB, -6dB and -10dB respectively. The green LEDs will belighted during normal working. The yellow LED will light at -1 dB. If the level of the audio signal reach the channeloutput capability, red LED will be triggered.The LED bars have diagnostic function also; a flashing yellow LED indicates a critic range of temperature(from 80°C to 85°C) of the power devices on the corresponding channel, if this LED is lighting constantly, thetemperature is above 85°C. A lighting constantly red LED indicates that the corresponding channel is underprotection and in this case the writing ”PROT” appears in the first line of the display. |
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