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11 

 

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 3 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 4 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 tubes (PCL86) has lost its 

nominal working parameters 

Switch off the amplifier. Wait until the 

vacuum tubes cool down. Exchange the 

positions of the 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.  
 
 

TECHNICAL DATA__________________________________________ 

 
Type:   

 

 

 

 

Stereo headphone amplifier 

Model:  

 

 

 

 

Omega Lupi 

Output power: 

 

 

 

2x250mW 

Circuit architecture:   

 

 

push-pull, AB1 class 

Output impedance:   

 

 

32-600 Ω 

Inputs   

 

 

 

1xRCA + parallel output 

Harmonic distortion THD: 

 

 

<0,3% 

Frequency response:   

 

 

20Hz-120kHz (-3dB) 

Power consumption:   

 

 

90W 

AC fuse: 

 

 

 

 

3,15T 

Net Weight:   

 

 

 

9,5kg 

Dimensions (width x depth x height): 

355x340x150mm 

Tubes:  

 

 

 

 

4x PCL86 

 

Summary of Contents for Omega Lupi

Page 1: ...Omega Lupi USER S MANUAL...

Page 2: ...er source Use a dry soft cloth Do not use water or cleaning agents If your amplifier starts to misbehave or to work incorrectly if it s temperature gets too high or you start feeling smoke immediately...

Page 3: ...NS 8 Hook up of the headphones 9 Hook up of the signal sources 9 Hook up of the supply cord 9 FIRST POWER UP AND GETTING STARTED 9 Setting appropriate headphone impedance 9 Burning in the amplifier 10...

Page 4: ...all underlined by a great feeling of fondness to those times long past Why is this happening The most likely reason is that it is a vacuum tube amplifier An amplifier with a specific warmth to its sou...

Page 5: ...ontent is not damaged Please do not dispose of the original packaging so as to facilitate possible shipment of the device in the future CONTENTS OF THE PACKAGE The package should contain Fezz Audio Om...

Page 6: ...6 DESCRIPTION OF ELEMENTS OF THE AMPLIFIER 1 PCL86 tubes sockets 2 volume control potentiometer 3 headphones impedance selector 4 housing for the output transformers 5 headphones input jack 6 3 mm...

Page 7: ...ientation of its pins rotate the tube to the correct position and try again WHERE TO PLACE YOUR AMPLIFIER Due to the presence of high temperatures during normal operation of the vacuum tubes the locat...

Page 8: ...i amplifier together with a description of the inputs and outputs allowing for connection of the other elements of your audio system To avoid electrostatic shock to the components of the amplifier ple...

Page 9: ...amplifier is switched off Connect the power cord to the IEC socket on the rear panel of the amplifier The amplifier is designed to operate at a rated voltage of 230V 50Hz Connecting the device to a m...

Page 10: ...t music playback 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 operat...

Page 11: ...ment 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 orientatio...

Page 12: ...plies with the following European Union Council Directives and Standards relating to electromagnetic compatibility EMC Directive 89 336 EEC and the low voltage Directive 73 23 EEC This declaration of...

Page 13: ...13...

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