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3. GETTING STARTED
3.4. Switching on for the first time – the Soft-Start feature
The MRE 220 SE is equipped with a multi-stage Soft-Start-Turn-On safety circuit which extends
component as well as tube life considerably by protecting against stress caused by typical high inrush
currents during switch on.
Procedure
1.
Connect the MRE 220 SE to the mains.
2.
Switch on the MRE 220 SE using the amplifier’s mains power on/off switch (see chapter
4 front panel
).The Power-LED
will illuminate.
3.
Turn the Input Rotary Selector
to Muting – the Muting LED
goes out
4.
Turn the Function Rotary Selector
to Eco off – the Ecomode LED on the top side goes
out (see chapter 6.4 Ecomode).
5.
After approx. 60 seconds you hear a relay click noise. The soft start phase is finished
and the power tubes start to work
3.5. Checking the power tubes – setting the BIAS
For the first function check you don’t have to connect the loudspeakers or the preamp.
The trim pots to adjust the BIAS are located next to their respective tubes. Next to each trim pot you
will see a pilot lamp, which shows which tubes have been selected with the bias selector switch. A
row of LEDs in front of the transformer cover assists you in setting the bias correctly. It shows three
conditions: bias too low -, correct ok, and too high +. Additional you find two LED’s indicating the
status of the ECO Mode Chap 6.5.) and the protection circuit (chap 6.3.).
Before checking the BIAS please wait five to ten minutes.
Because the tubes are still cold you
would adjust the wrong BIAS.
Summary of Contents for MRE 220 SE
Page 1: ...MRE 220 SE Owner s Manual English...
Page 3: ...4...
