Operating Notes; Powering Down; Troubleshooting - AKG WMS4000 Modo De Empleo

• 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.
Problem
No sound.
On powering up, the unit loads the default
settings (channel 1, medium volume)
instead of the stored user settings.
HPA 4000
Possible Cause
1. Power supply is not connected to head-
phone amplifier and/or power outlet.
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.

4 Operating Notes

4.1 Powering Up
4.2 Muting the
Headphone Output

4.3 Powering Down

5 Cleaning
Important!
Important!

6 Troubleshooting

Remedy
1. Connect power supply to headphone
amplifier and/or power outlet.
2. Switch headphone amplifier and/or receiv-
er ON.
3. Connect receiver output(s) to headphone
amplifier input(s).
1. Disconnect and check headphones.
2. contact your nearest AKG Service Center.
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