Hughes & Kettner MK II manual Troubleshooting

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TRIAMP MK II - MANUAL

6.0 TROUBLESHOOTING

TriAmp® MK II is not getting

any power:

Check the mains cable to see if it is connected properly.

The mains fuse is defective. Replace the fuse with another identical fuse.

TriAmp® MK II is connected properly,

but no sound is audible:

The amp is set to STANDBY.

One or several GAIN and MASTER controls are turned all the way down. Dial in a higher setting.

The anode fuse is blown. Before you replace the fuse, examine whether the power amp tubes are defective.

The fuse for the tube heater blew (the tubes don’t glow). Make absolutely certain to check the rating when replacing this fuse. It is a super- slo blo TT 15 A fuse. This type of fuse is relatively uncommon and may be hard to find in your area. That’s why your TriAmp® MK II shipped with a replacement fuse. Be sure to have a service technician replace the fuse.

The sound is thin and muddy when the effects processor is active:

The effect device routes back a dry signal that is added to the original dry signal in the parallel effects loop. Depending on the type of em- ployed effect device, the phase position of the dry return signal can lead to cancellations when the return and original signals are mixed. To fix this problem, switch the effects loop to SERIAL or turn the dry signal all the way down on the effect device.

When in use with a loud PA,

the RED BOX® DI OUT circuit is causing feedback even though the amp is set to a low MASTER volume:

Speakers connected to a tube amp may have microphonic properties. Turn TriAmp® MK II’s Master VOLUME up and the circuit will stop feeding back. In extreme cases of microphonic speakers, you would either turn the PA down or mic the cabinet.

Fuse keeps on blowing:

After replacing the fuse, with standby off, turn on the power. Watch the power tubes, turn standby on. Look for tube “flash” before fuse blows, indicating excess oxygen within the tube. This will show which power tube needs to be replaced.

The FX LOOP is on when

it shouldn’t be:

The FX LOOP is deactivated when the front panel button, the Stageboard button and the MIDI module switching function are off. If any of these three switches is on, the circuit is active.

Your amp is producing ringing noises

or tends to feedback:

One or several tubes are microphonic. Replace the appropriate tube with another of the same type.

After just a few hours of operation, your amp is displaying the typical characteristics of old tubes (increased microphonics and noise, treble loss, weak power output, muddy sound).

You have installed the wrong tubes or the bias is not adjusted properly. Take the amp to a profes- sional amp technician to correct the problem.

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Contents Watt Tube Amplifier Wichtig Thank YOU for Choosing the Triamp MK Three Amps in the Triamp MK Before Powering UPContents AMP 1 Chunky Clean + FAT Drive Clean AMP 2 Classic British DriveConnections and Control Features AMP 3 Modern GainPreamp Section Overview of Control FeaturesFront Master SectionRear FX LoopChannel Selection Standard SETUP/CABLE Connections Triamp MK II OperationTriamp MK II and Signal Processors Stageboard jack pin assignmentsConnecting signal processors RED BOX DI OUT ALL-TUBE Tone to the MixerInstalling the MSM-1 Midi Module Triamp MK II and MidiWhen is it a good idea To replace tubes? What should you keep in mind When you’re replacing tubes?How can you extend the service life Tubes? Troubleshooting Deutsch Inhalt Dreizehn Röhren FÜR DEN Guten TONVOR DER Inbetriebnahme AMP 1 Chunky Clean + FAT Drive Clean Anschlüsse UND Bedienelemente Netzanschluss UND Wahl DER NetzspannungPreamp Sektion Übersicht DER BedienelementeVorderseite Master SektionRückseite DER Triamp MK II MIT Effektgeräten Standard SET UP/VERKABELUNG Bedienung DES Triamp MKDAS Anwählen DER Kanäle Pinbelegung der StageboardbuchseRED BOX DI OUT Vollröhre AM Mischpult Anschluss DES EffektgerätesInstallation des MSM-1 MIDI-Moduls DER Triamp UND MidiWas ist beim Röhrentausch Zu beachten? RÖHRENTAUSCH, Wartung UND PflegeWann ist ein Röhrentausch sinnvoll? Wie kann man die Lebensdauer Von Röhren verlängern? Der Effektweg ist ungewollt aktiv FEHLERBESEITIGUNG/TROUBLESHOOTINGDer TriAmp MK II lässt sich Nicht einschalten Allgemeines Technische DatenGeneral Data Hughes & Kettner Triamp MK United states Deutsch English Francais Italiano Español To find a local distributor please visit