Decware SE84UFO Owner's Manual

Page 1
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Owner’s Manual
Model!
S E 8 4 U F O"
Stereo Power Amplifier"
Page 2
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TO RIGHT SPEAKER
TO LEFT SPEAKER
HI / LO SWITCH
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FUSE
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5x20 mm!
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SYMPTOM
CAUSES
REMEDIES
Hum through speakers
Ground Loop
Plug power cord into a different outlet.!
!
Install 2-pin adapter on power cord plug to float the ground.
Intermittent ground or shield wire in interconnect cable
Replace interconnect cable.
Noisy Input Tube
Replace Input Tube.
Bad Rectifier Tube
Replace Rectifier Tube.
Unshielded Interconnect used
Re-route cable away from power supplies and power cords or replace with shielded cable.
Digital Light Dimmers on same circuit
Turn off digital dimmers. WIFI bridge or router nearby
Locate farther away from audio components
Hum from amp itself
Chattering rectifier tube
Tap on tube to see if chattering stops and if so replace rectifier tube.
Power transformer
Poor voltage or over voltage at the wall outlet can cause an increase in power transformer vibration, correct voltage.
Relocate amp to middle of room to see if transformer hum reduces. If so, the shelf or rack the amp was in can be changed.
Page 13
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SYMPTOM
CAUSES
REMEDIES
Popping or Spitting noise
Noisy tube
Replace noisy tube
Wirouter or bridge nearby
Locate away from audio components
AC fuse blows
Line voltage surge
Replace fuse
Rectifier Tube Arced on initial startup
If it continues, replace rectifier tube and fuse.
Fuse is too small
Install correct amperage fuse. If amperage IS correct and fuse blows, use a SLOW BLO fuse of the same amperage.
One Channel stops working
No signal to that channel
Take the cable from the channel that works and put it into the channel that stopped working. If it starts working, the amp is fine, but you have either a bad cable or problem with your preamp or source component.
Speaker cable came unhooked
Reinstall speaker cable.
Output tube failed
Replace output tube.
Channel imbalance
Output tubes no longer match
Replace output tubes with a matched pair.
Input tube sections no longer match
Replace input tube with a new input tube that has matched sections.
Speaker HI/LO impedance switches are not set the same.
Adjust the HI/LO switches the same for each channel.
U.-@G10;C-->BF
Page 14
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SYMPTOM
CAUSES
REMEDIES
Amp wont turn on
Blown Fuse
Replace fuse
Power cord is not pushed in all the way or intermittent
Check power cord, replace if necessary.!
Tubes light up but no sound
Rectifier tube is bad even though it still lights up
Replace rectifier tube. Volume control is all the way down.
Increase volume control level
The source switch is set to the wrong source
Adjust the switch to the other position.
Your source is not playing
Start source
Interconnect cables are unhooked
Reinstall interconnect cables.
Incorrect tubes are installed
Install correct tube types
tubes are installed in the wrong locations
Reinstall tube in the correct locations.
Sound is real weak
Source switch set to wrong source
Reduce volume and Adjust source switch.!
Sound is getting weak
Tubes are past rated life of 3000 hours
Replace tubes.
Sound drops out on both channels and comes back on
Power cord is loose
Check power cord, replace if necessary.!
Page 15
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DATE INSTALLED
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