- Is the proper input selected? -
Select active input.
- Is there a signal present form the source? –
If there is a signal coming from the
source and the proper input is selected, the VU meter will display that signal. If this is
the case, please check the connections to the loudspeakers otherwise check the
signal cables. Often, if the problem occurs only with one channel, chances are that a
signal cable is defective and needs to be replaced.
- Has there been an electrostatic discharge to the unit? –
It can happen, especially
during winter when the ambient air is very dry, that fabrics (clothing, carpets) build up
a static electrical charge which may be discharged to the amplifier chassis by simply
touching the unit. This kind of static discharge can cause the microprocessor
controlling the Monolog amplifier to “crash”, similar to a computer “crashing”. This
may cause the Monolog's logic circuits to deactivate the output relays or to simply
stop responding. Switch off the power to the Monolog from the power switch located
on the unit’s front panel for 30 to 60 seconds. Generally the amplifier will resume
functioning normally once power is restored.
4.3 ... it hums?
Are the signal cables securely connected? -
Check the input cables.
In some cases the electrical grounding of multiple components can cause so-called
ground-loops that induce humming. Troubleshooting these may require some
experience. Please contact your dealer for assistance.
Hum is present only when a tuner (radio or TV), a VCR, DVD recorder or a video
display is connected to the preamplifier. -
These types of components are usually
hooked up to an antenna or cable feed, which may in turn be grounded separately.
This can also cause a ground loop. In this case a so-called ground breaker may
solve the problem. They are usually inexpensive and can be readily purchased from
well stocked HiFi, radio or television specialty stores.
