Remote Level Connections; Troubleshooting - AKG AS8 Operating Instructions Manual

R L C
EMOTE EVEL ONNECTIONS
The figure below shows several options which may be used for remote level control of the AS8. Pots, switches, and external
control voltages may all be used as the application dictates.
Ch 1 Wiper
Ch 2 Wiper
Ch 3 Wiper
Ch 4 Wiper
Ch 5 Wiper
Ch 6 Wiper
Ch 7 Wiper
Ch 8 Wiper
Ch 1-8 CCW
Ch 1-8 CW
Main CW
Main Wiper
Main CCW
Reset to Local
T
ROUBLESHOOTING
SYMPTOM
No sound from system
Difficulty activating certain mics
All front panel channel LEDs are
on all the time, with or without
signal applied.
You can't control the channel and
main gains from the rear panel
Remote Level Control connector.
WIRING DIAGRAMS, REMOTE LEVEL CONTROL PORT
(REMOTE LEVEL CONTROL PORT, 15 PIN D-SUB)
Continuous
Level Control, Ch 1 Channel Mute, Ch 5
10k Linear Plot
Pin 1
< <
Pin 2
<
Pin 3
<
Pin 4
<
Pin 5
< <
Pin 6
<
Pin 7
< <
Pin 8
<
Pin 9
< <
Pin 10
< <
Pin 11
<
Pin 12
<
Pin 13
<
Pin 14
<
N/C
Pin 15
<
POSSIBLE CAUSE
1) Main level control not turned up
2) Channel level not turned up
3) Input gain setting too low
4) Phantom power not on for electret microphone
5) Remote level control turned down
1) Mic level is too low relative to other mics - Turn up the mic level
1) If you are using just one AS8/AS8-TC, be sure the rear
panel Master/Slave switch is in the Master mode.
2) Be sure that the Direct/Auto dip switch associated with each channel is in
the Auto position. If changing these switches does not fix the problem, the
AS8/AS8-TC might be in the Remote mode. It can be reset to the Local
mode by turning the power off, shorting pins 10 and 15 together (located on
the rear panel Remote Level Control connector), and turning the power back
on while the pins are shorted.
3) If you are using more than one AS8/AS8-TC in your system, set the
AS8/AS8-TC whose Expansion In (but not Expansion Out) port is used to
Master mode, and all other AS8/AS8-TCs to Slave mode.
1) The AS8/AS8-TC might be in the Remote mode, in which case it will
not respond to control voltages applied to the Remote Level Control
pins. The AS8/AS8-TC can be reset to the Local mode by turning the
power off, shorting pins 10 and 15 together (located on the rear panel
Remote Level Control connector), and turning the power back on while
the pins are shorted.
On/Off
SPSTSwitch
On - Open
Off - Closed
•
•
9
Continuous
Level Control, Ch 7
External DC Control Voltage
Control
Voltage
Gnd
Maximum Distance vs Wire
Gage for Remote Control
Connections
Single All 9
Control Controls
20 AWG 5000 ft 550 ft
22 AWG 3000 ft 350 ft
24 AWG 2000 ft 200 ft
26 AWG 1200 ft 125 ft
28 AWG 750 ft 75 ft