Appendix
Troubleshooting
Malfunction during operation cannot always be attributed to a damage within
the device. The following table may help you to find out the reason of a
malfunction and to remove it. If none of these suggestions solves the problem,
contact your Acapella dealer or us.
Discovered malfunction
Possible reason
Check up, remedy
No function
No mains voltage
available, Fuse F2
defective
Look from above through the cover at the oscillator tube. If power is supplied, you
can see the filament slightly glowing on the top of the tube. If yes, there is a
malfunction, if no, check the electrical outlet and the fuse.
No ignition of the arc
or it will go out during
operation
Fuse F1 or F3 defective
Disconnect the mains plug. Unscrew the fuses and check them with an ohmmeter.
Optical control can be faulty.
If you need to replace the fuses, use only those
with the same value!
Manual switch-off
(reset) impossible
1.
Input voltage is too high
2.
Disturbing voltage at the
input
1. Turn the volume control to off
2. Disconnect the input jack. If „reset“ now operates perfectly,
check your Hi-Fi system for interferences (hum, noise).
With no incoming signal, it
does not switch-off in
„automatic“ operation
Disturbing voltage at the input
or in the power supply mains
Disconnect the input jack. If the device switches off after approx. 20 minutes, check
the signal-to-noise ratio in your system (hum etc.). If not, malfunction can be caused
by interference pulses in the mains voltage. Try to switch-off with „reset“. If there is
no positive result, the switch-on logic is defective. Disconnect the AC mains plug.
With no incoming signal, it
switches on without
a musical signal
See above
See above. Further possibility of a malfunction: If higher sound pressure levels from
other sources are reproduced in your room or if the power supply mains have
interference pulses, even though above mentioned checking showed perfect operation
of the switch-on logic, you should let increase the threshold value by your Acapella
dealer or by us.
Crackling
Dirt particles in the
combustion chamber
Bring the unit into the „manual“ continuos operation mode and let it be running
up to 48 hours. If there are only slight disturbances, repeated switch-on and -off
can remedy these things. The entire starting cycle must be run, because the function
„quick warm-up of the combustion chamber“ doubles the energy of the arc. Do not
repeat this procedure more than 6 - 8 times with intervals (60 sec.). Usually, the
dust particles, causing the disturbances, will be burned.
Chirping and whistling
Dirt particles in the
combustion chamber or
faulty interconnection
See above. Loose dirt particles can cause an instability in the oscillator frequency
which can produce these disturbances. Another possibility are interferences between
the oscillators of both the devices. This suggests an insufficient interconnection
between the tweeters and the amplifier. Please inspect the cables (earth connection,
contacts).
No constant burning or break
of the arc after a complete
start-up
Control voltage, electrode;
oscillator tube
The design of the „Class A“ driver amplifier does also allow higher temperatures
without the chance of damage within the devices. It reduces its supplied voltage
when heating becomes stronger through which the intensity of the arc will decrease.
These „optical“ effects do not harm the sonic quality. On the other hand, the arc
of the unit which was running for a longer period (800 - 1000 hours of operation)
can show a „loss of strength“, independent of the operational temperature. These
is an indication that the oscillator and/or the combustion chamber should be
renewed.
Summary of Contents for Violon 2001
Page 1: ...Instruction manual...