Lexicon 480L | PDF - Freeverb3
Lexicon 480L | PDF - Freeverb3
Lexicon 480L | PDF - Freeverb3
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<strong>Lexicon</strong> <strong>480L</strong> Owner's Manual<br />
Voltage Changeover<br />
Voltage changeover is a fast and easy process:<br />
1. Remove the power cable from the <strong>480L</strong>.<br />
2. Insert a small flat-bladed screwdriver or an IC<br />
puller into the slot next to the fuseholder cartridge,<br />
which is located just to the right of the power connector.<br />
Pry the cartridge out so that it drops out of the chassis.<br />
Set the fuseholder cartridge aside.<br />
3. The voltage changeover board is mounted vertically<br />
in a small compartment which is normally covered<br />
by the fuseholder cartridge (which you removed in<br />
step 2). Remove the board with a pair of needle-nosed<br />
pliers or tweezers.<br />
4. The four sides of the board are marked with the four<br />
voltages at which the <strong>480L</strong> can be operated (100, 120,<br />
200, 240). Slide the voltage changeover pin around<br />
until it fits in the notch opposite the side marked with the<br />
operating voltage you require.<br />
5. With the pin facing out, replace the board in the<br />
chassis. Press it until it snaps into place or fits firmly in<br />
its socket.<br />
6. The fuseholder cartridge is supplied with two sets<br />
of fuses—a single 3 A, 3AG Slo-blo fuse for 100/120 V,<br />
and two 1.5 A 20-mm Slo-blo fuses for 220/240 V. To<br />
change the fuses over to 220/240 V, remove the small<br />
Phillips-head screw on the cartridge, and turn over the<br />
board. Reinstall the screw. The European 20-mm<br />
fuses should now be visible.<br />
Reverse the process to change from 220/240 V to 100/<br />
120 V operation.<br />
7. Reinstall the fuseholder cartridge. Check the pin<br />
indicator to verify that you selected the correct voltage.<br />
If none of the holes in the fuseholder line up with the pin<br />
on the voltage changeover board, you installed the<br />
board upside down. Reinstall it correctly and try the<br />
fuseholder again.<br />
Installing the<br />
Optional Transformers<br />
Some applications require that the <strong>480L</strong> operate under<br />
adverse electrical conditions. In these situations, it<br />
may be beneficial to transformer-couple the <strong>480L</strong>'s<br />
audio inputs and outputs. The <strong>480L</strong> allows easy installation<br />
of audio transformers inside the unit. Please note<br />
that transformers are not available from <strong>Lexicon</strong>. They<br />
can be purchased directly from their manufacturer or a<br />
pro audio dealer.<br />
If you choose to install transformers, follow these<br />
instructions carefully.<br />
For the <strong>480L</strong> inputs, we recommend Jensen JE-11P-1<br />
transformers.<br />
1. On the main circuit board (component side) of the<br />
<strong>480L</strong>, cut the etch between E4 and E7, E5 and E8, E10<br />
and E13, E11 and E14.<br />
2. Install a 510 pF 2.5% polypropylene capacitor at<br />
C143.<br />
3. Install a 510 pF 2.5% polypropylene capacitor at<br />
C183.<br />
4. Install a 15 kilohm, 1% resistor at R152.<br />
5. Install a 15 kilohm, 1% resistor at R187.<br />
6. Connect a Jensen JE-11P-1 transformer as follows<br />
for the left channel:<br />
<strong>480L</strong><br />
E3<br />
E4<br />
E5<br />
E6<br />
E7<br />
E8<br />
Transformer<br />
White<br />
Brown<br />
Red<br />
Black<br />
Orange<br />
Yellow<br />
7. Connect a Jensen JE-11P-1 transformer as follows<br />
for the right channel:<br />
8. This completes the voltage changeover.<br />
<strong>480L</strong><br />
E9<br />
E10<br />
E11<br />
E12<br />
E13<br />
E14<br />
Transformer<br />
White<br />
Brown<br />
Red<br />
Black<br />
Orange<br />
Yellow<br />
D-2