VTL TL6.5, Руководство пользователя

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outlet, if this is not possible.) If however there are too many paths to ground then
a ground loop hum can result and you should either contact your dealer or the
VTL factory to try to resolve this problem.
5. I am getting a noise and hum coming from my video source. What can I do to
eliminate the noise?
The noise may be coming in from your video cable system. First disconnect the
VCR from the system to see if this will solve the problem. If it does then you will
need to try to lift the ground from the cable TV wire by means of a cable ground
lifting transformer available from most electronics stores. If the problem still
persists contact your VTL authorized dealer or the VTL factory service
department.
6. I am getting a ringing noise from the preamplifier when I touch or bump it. What
should I do?
One or more of the tubes in the preamplifier may be microphonic and the source
of the problem. Follow the procedures listed in this manual to remove the tubes
and change them for new ones.
7. I am getting no sound from one (or both) channel(s), but everything appears to be
powered up properly. I have isolated the problem to the preamplifier, and I checked
the mute and input selection on the preamp, and the tubes are glowing, but still I get
no sound. What is the problem?
There are protection fuses mounted on the output stages of the TL 6.5
preamplifier that will open to protect the circuit if the outputs are accidentally
shorted with high signal. This can happen if connections to the unit are attempted
while it is powered up. The unit should be taken to a dealer to have the fuses
checked and replaced. If the correct fuses are in place there is most likely no
damage to the unit, as the fuses are designed to open before damage occurs, so
most likely the fuse replacement will fix the problem.
8. The fuses have been checked and they are fine, but there is still no sound. Now what
is the problem?
There is a second set of fuses to protect the power supply in the case of output
stage failure, and they should be checked in this case. They are designed to blow in
the event of output stage failure, and in this case there is a likelihood that the
output stages will have to be checked and possibly replaced. In this case the
dealer’s service technician should contact the factory.
9. My remote control hand held unit for the preamplifier is not working. What should I
do?
Look at the back of the remote control unit. Loosen the four screws with a Philips
screwdriver, and open the back cover. Locate the two batteries inside the remote
unit, and take the old batteries out and replace them with new AAA batteries. Put
TL6.5 Preamplifier Owner’s Manual
VTL
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