Operating Notes; Troubleshooting - AKG WMS4000 Bedienungsanleitung

• To power up, press the front panel ON/OFF key.
All SOURCE LEDs will be lit constantly for approx. 3 seconds, then only the LED assigned to the cur-
rently selected channel will remain lit.
1. Press and hold the setup control until the SOURCE LEDs start flashing. (The number of flashing LEDs
indicates the current volume setting.)
2. You can switch the headphones output back on in one of two ways:
a) Press and hold the setup control until all SOURCE LEDs will be lit constantly for a few seconds
and the LED for the selected channel alone will remain lit. The volume level will revert to the previ-
ous setting.
b) Turn the setup control all the way CW or CCW and release. The volume level will automatically
change to a factory preset minimum. SOURCE LEDs 1 and 2 will be lit.
To revert to the previous volume setting, turn the setup control all the way CW.
• Press the ON/OFF key.
The SOURCE LEDs will go out. The current settings will be stored in the EPROM and automatically
loaded the next time you power up.
1. Switch power to the unit off and disconnect the power supply from the power outlet.
2. Use a cloth moistened (not wet!) with water to clean the surfaces of the equipment.
Never use caustic or scouring cleaners or cleaning agents containing alcohol or solvents since
these may damage the enamel or plastic parts.
On powering up, the unit loads the default
settings (channel 1, medium volume)
instead of the stored user settings.
HPA 4000
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Problem
1. Power supply is not connected to head-
phone amplifier and/or power outlet.
No sound. 2. Headphone amplifier and/or receiver is
OFF.
3. Receiver(s) is (are) not connected to head-
phone amplifier.
1. Headphone output is shorted.
2. EPROM defective.
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4 Operating Notes

6 Troubleshooting

Possible Cause
1. Connect power supply to headphone
2. Switch headphone amplifier and/or receiv-
3. Connect receiver output(s) to headphone
1. Disconnect and check headphones.
2. contact your nearest AKG Service Center.
4.1 Powering Up
4.2 Muting the
Headphone Output
4.3 Powering Down
5 Cleaning
Important!
Important!
Remedy
amplifier and/or power outlet.
er ON.
amplifier input(s).
7