Klein + Hummel
Operating Manual KPA Series
English
12
■
Setup and settings
Introduction
The
figure 9
below shows the front panel of KPA Series. The front panel controls, in conjunction with the graphic
LCD display above the buttons, give to the user the total control and detailed information about the status of the
amplifier. Each pushbutton has multiple functions and the display shows the current active function for each
button.
Read carefully the instructions below that help you to manage the functions of the amplifier.
-1
Signal
-2
-3
-6
-10
Clip
-1
Signal
-2
-3
-6
-10
Clip
K A
B
C
D
E
F
G
H
J I
A V/I-meter channel no 1
G
Graphic LCD display
B Smartcard
reader
H
V/I meter channel no 2
C
Function button no 1
I Power
switch
D
Function button no 2
J Title
block
E
Function button no 3
K
Panel unlocking
F
Function button no 4
figure 9
The main screen
The
figure 10
show the main screen; this screen appears after a short presentation when the user powers on the
amplifier. In the first line, after power on, the writing "WAIT" appears; if the system parameters are normal, the
writing are replaced with "READY". During the normal operation the controller monitors the system parameters. If a
parameter is out of range, the correspondent code error is written on the LCD meter of the relative channel in the
third line; if the abnormal parameter is associated to both channel, the error code is written in the centre.
figure 10
The LED bars can function as output voltage or output current meters; in the first case the LCD meters function as
output 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
and
5
th
LED in the ascending order indicates an output level of -3dB, -6dB and -10dB respectively. The green LEDs will be
lighted during normal working. The yellow LED will light at -1 dB. If the level of the audio signal reach the channel
output 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, the
temperature is above 85°C. A lighting constantly red LED indicates that the corresponding channel is under
protection and in this case the writing ”PROT” appears in the first line of the display.
