6.1STANDBY indicator
When the appliance is correctly connected and mains and/or battery power is present, the green STANDBY indicator
(4) will light.
6.2READY indicator
Both amplifiers, the DPA 4120 and the DPA 4140, employ
6.3PROTECT indicator
When thermal overload of the mains transformer or the power amplification stage is encountered, the red PROTECT indicator (5) will light and the READY fault message relay drops. After the amplifier regained normal temperature, the red PROTECT indicator (5) is automatically dimmed and the appliance returns to normal operation. High temperature can be caused by overload, extreme ambient temperatures or faulty functioning of the system's ventilation.
6.4GROUND FAULT indicator
If, with the NRS 90224 extension installed, a ground fault is being detected at the power output, the red GROUND FAULT indicator (6) will light and the READY fault message relay will drop. During the occurrence of this error normal operation is maintained. After eliminating the cause for the ground fault, pressing the TEST button (3) resets the GROUND FAULT indicator (6) (see also paragraph 8.5.2).
6.5Level meter and CLIP indicator
The green
-If the red
-Continuous lighting or blinking of the red
-If the green LED indicator (1) does not light or is only briefly lit with the red
Caution During normal operation the red
7.Switching the output voltage (only to be performed by a qualified service technician!)
The DPA 4120 and DPA 4140 amplifiers allow the connection of 50V, 70V, 100V or
4120) or 84175 (DPA 4140):
Caution Before opening the appliance, make sure to disconnect the mains and/or battery power source!
-To open the appliance, the top panel has to be removed.
-The bridge B411 (yellow wire) has to be removed from the contact B407 and
-he
(the inserted
-The top panel has to be
Note | By using a waterproof marker pen and after switching the output voltage, the newly set value |
| has to be marked in the filed "OUTPUT VOLTAGE" on the rear panel of the appliance. |
|
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