9
The full sonic capabilities shall stabilize and unfold within a time-span ranging from
40 to 60 hours of music reproduction at a moderate volume levels.
In the initial period of operation of the amplifier it is advisable to avoid short-term
operation periods of the amplifier. Once activated, it should remain operational for a
period of about 4-6 hours.
REPLACEMENT OF THE VACUUM TUBES
Your amplifier is equpped with automatic bias module. It’s necessary to use vacuum tubes
that have previously been pre-selected and paired up in quads or pairs.
OPTIONAL EQUIPMENT_________________________________
VACUUM TUBE PROTECTIVE CAGE
The following picture show the correct positioning of the optional protective cage for the
tubes.
TROUBLE-SHOOTING GUIDE_________________________________
If your amplifier does not work as it is supposed to, it is fairly easy to diagnose and remedy
some of the common malfunctions, by following procedures as outlined in this following.
THE PROBLEM
PROBABLE REASON
THE SOLUTION
After turning the power switch to the ON
position, the amplifier does not switch on.
A blown fuse
Please exchange to faulty fuse to a new one
(3,15A T), within the fuse holder as depicted
with index 4 on page 8 of this user’s manual.
An improper connection of the mains cable
Please check if the plugs of the mains cable
are properly inserted into the electrical
mains socket and to the socket as depicted
with index 5 on page 8 of this user’s manual.
The sound produced by the amplifier is
distorted. A hum or pops have appeared
and are coming from one of the channels.
An improper placement of the vacuum
tubes in the sockets
Switch off the amplifier. Wait until the
vacuum tubes cool down. Check for proper
placement of vacuum tubes in their sockets.
If necessary
–
correct their orientation.
One of the driver tubes (6SN7) has lost its
nominal working parameters
Switch off the amplifier. Wait until the
vacuum tubes cool down. Exchange the
positions of the driver tubes between
channels. Turn on the amplifier. If the
disturbing sounds have moved to the other
channel, inform Your local Fezz Audio dealer
about tube which need to be replaced.
One of the Power tubes (300B) has lost its
nominal working parameters
Switch off the amplifier. Wait until the
vacuum tubes cool down. Exchange the
positions of the power tubes between
channels. Turn on the amplifier. If the
disturbing sounds have moved to the other
channel, inform Your local Fezz Audio dealer
about tube which need to be replaced..
If You have verified the aforementioned situations, and your problem still persists, please
contact Your local Fezz Audio dealer.
