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Rewiring Your HCA-2003 for 220 V - 240 V 50 Hz Operation
The HCA-2003 may be rewired for operation abroad. This involves changing the primary wires on the
power transformer. Please refer this conversion to a skilled electronics technician to avoid personal
injury or possible damage to the amplifier. There are hazardous high voltages present inside the chassis
even after the power is turned off and the AC cord has been disconnected.
For 110 V - 120 V operation, the red and white transformer primary wires are connected together and
the yellow and black primary wires are also connected together. The 120 V AC source is then
connected to the black/yellow and red/white wires.
For 220 V - 240 V operation the yellow and white wires are connected together and the 220 V AC
source is connected to the black and red wires. When you change the voltage from 120 V to 220 V, be
sure to change the main fuse from 15 amps to 7.5 amps.
Special Features
• Designed by John Curl
• THX certified by Lucasfilm Ltd.
• Massive Encapsulated 1.2 kVA Power Transformer with Separate Windings for Each Channel
• 90,000 uF Computer-grade Capacitors in the Power Supply
• Multiple Polystyrene Film Bypass Capacitors to Smooth the Power Supply
• Independent Power Supplies for Each Channel
• Separate Regulated Power Supplies for Driver Stage
• Cascode Class A Input Stages with Matched Complementary J-FET Pairs
• Hand Picked Complementary MOSFETS in High Voltage Driver Stages
• 12 Complementary Pairs of Beta-Matched 50 MHz, 15 Ampere Output Transistors
• Output Transistors Direct-Coupled to Speakers Without LRC Networks
• Linear Tracking, Instantaneous Acting DC Servos
• High-Bias Class A/AB Operation
• Gold-Plated Metal Structure RCA Input Jacks
• Multiple Temperature Sensors and Silver-Cadmium Relay Protection
• FR-4 Glass Epoxy Circuit Boards, Double-Sided for Precision
• Custom Designed Audiophile-Grade AC Power Cord
White
Yellow
110/120 V Operation
Red
Black
Red
Black
Yellow
White
220/240 V Operation
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