Harman AKG DMM8 U, User Instructions

Page: 129 / 259

troUbLeshooting
DMM8 MANUAL 129
9 Troubleshooting
WARNING: Risk of electric shock
There are unprotected contacts and cables within the unit that could cause
serious injury from electric shock on contact.
• The unit is only permitted to be opened by authorized, qualified
personnel for troubleshooting purposes.
PROBLEM POSSIBLE CAUSE REMEDY
No sound Power supply cable is not connected
to unit Connect power supply cable to unit
Power switch off Turn power switch to on position
Device is not connected to amplifier Connect output channel to amplifier
Microphone or auxiliary equipment not
connected to unit Connect microphone or auxiliary de-
vice to unit
Volume control set to minimum Turn up volume control
Volume controls set to
MUTE Cancel MUTE
by pressing the rotary
knob
Pre-amplification not set correctly Set gain control on rear panel to cor-
rect pre-amplification
Phantom power is switched off Switch on phantom power for con-
denser microphone
External potentiometer set to minimum Turn up external potentiometer
No sound with sinu-
soidal feed Automix algorithm suppressing con-
stant signal Exclude channel from automix algo-
rithm