Classe Audio DR-9 - Fuses; Voltage Change

PRO-SVR_LEGACY Page 10 of 11
Fuses
EXTRA PRECAUTIONS SHOULD BE TAKEN WHEN REPAIRING, MODIFYING, O
R
TROUBLESHOOTING IN THE POWER SUPPLY AREA. UNIT MUST BE DISCONNEC
T
FROM MAIN SOURCE AND CAPACITORS MUST BE DISCHARGED USING A 100W
INCANDESCENT BULB.
WHEN REPLACING FUSES, PLEASE MAKE SURE THAT THE FUSE HOLDERS ARE
HOLDING THE FUSES VERY TIGHTLY. A LOOSE FUSE HOLDER CAN TRANSLATE INTO
DISTORTION ON TOP OF THE SIGNAL.
Main fuses:
For 100 – 120v units: 8A slo-blo, Classe part number MDL-8A
For 220 – 240v units: 6A slo-blo, Classe part number MDL-6A
The main fuse is located at the back of the unit, on the rear panel.
Voltage Change
EXTRA PRECAUTIONS SHOULD BE TAKEN WHEN REPAIRING
,
MODIFYING, O
R
TROUBLESHOOTING IN THE POWER SUPPLY AREA. UNIT MUST BE DISCONNEC
T
FROM MAIN SOURCE AND CAPACITORS MUST BE DISCHARGED USING A 100W
INCANDESCENT BULB.
Using a ohmmeter, locate and label each of the four transformer windings. Rewire the terminal block,
according to the schematic in fig. 1.
Replace varistor with correct value.