Specifications

DPA 6.4
PAGE 10
TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSE POSSIBLE SOLUTION
Apparatus is put in STANDBY. 1: High frequency noise
2: Problem with the signal cable.
3: DC on the inputs.
4: Overheating.
5: Strong signal clipping.
1: Insert a mains filter between
the power amplifier and the
main outlet.
2: Check for proper
grounding/shield of the cables,
or replace the cables.
3: Check if DC is present on
the signal source output.
4a: Check if the loudspeaker
cables are partially short-
circuited, or replace the
cables.
4b: Ensure that the amplifier
has at least 15 cm of free
space on top.
5: Input level is too high.
Humming sound heard from the
loudspeakers.
Degraded/defective shield on the
signal cables.
Check or replace the cables.
No sound, but the indicators are
lit.
Fuses (T5A) may be defective. Replace the fuses and check
the apparatus for proper
operation. Check if the
loudspeaker cables are wired
correctly and/or if a shortening-
circuit has occurred.