Hughes & Kettner ATTAX 50 manual Troubleshooting, Technical data

ATTAX-MANUAL

6.0 TROUBLESHOOTING

1) The ATTAX will not switch on:

-The amp is not getting any AC power. Check the mains cable to see if it is connected properly.

-The mains fuse is defective. Replace the fuse with another identical fuse. If this fuse also trips, consult your Hughes & Kettner dealer.

2)The ATTAX is connected properly, but no sound is audible.

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

- A short circuit in the speaker signal chain may have trip- ped an internal fuse. Make sure none of the connections are shorted out and have a qualified service technician replace the fuse (identical specifications are a must).

3)The footswitch does not switch channels:

- The front panel selector switch may be in the LEAD positi- on. Set it to CLEAN (in this case, CLEAN = off).

-The footswitch is not connected to the ATTAX. Plug it into the appropriate jack.

4)When accessed, the LINE OUT/LINE IN jacks cause annoying hum.

- An electrical or magnetic field is causing interference. Use higher-quality cables or re-arrange the cables you are using to reduce interference to a minimum. If this still doesn't improve the situation, use a DI box.

- The grounding of the connected devices may be causing a ground loop. DO NOT SEVER THE GROUND OF THE CONNECTED DEVICES UNDER ANY CIRCUMSTANCES! Try plugging all devices into the same socket via an AC power distributor/power strip. If this doesn't eliminate the noise, you must ensure the connection is galvanically sepa- rated by routing the signal through a DI box.

5)You have connected an FX processor to the LINE OUT jack and the signal is totally distorted, even when you have dialed in a clean sound.

- The LINE OUT signal is overloading the input of the FX processor. Reduce the processor‘s input sensitivity ("INPUT" or "GAIN").

6)You have connected an FX processor to the LINE OUT jack of the ATTAX and the signal's volume level is way too low.

- The FX processor's output level is set incorrectly. Turn it up.

7.0 technical data

Preamp Section

Preamp section:

CLEAN + LEAD solid state channels

INPUT:	-10 dBV/ 1 M ohm
LINE IN:	-6dBV/ 50 k ohms
LINE OUT:	0 dBV/ 1k ohm

Power amp section::

'CURRENT FEEDBACK' solid state power amp

Output Power: 40 watts rms into 8 ohms

Freqency response:

20 Hz - 30 kHz (into 8 ohms)

Speaker:

CELESTION RockDriver Vintage, 12”, 8 ohms

General features:

Voltage:

230 V~ (European model)

117 V~ (North American model)

100 V~ (Japanese model)

Max. power consumption: 70 VA

Mains Fuse: slo-blo 250 mA (230 V model) slo-blo 500 mA (117 V model) slo-blo 630 mA (100 V model)

Dimensions: (W x H x D)

480 x 490 x 275 mm 19“ x 19.25“ x 11“

Weight: approx. 29 Lbs./approx.13 kgs

ENGLISH

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