What does error code E01/PROTECT mean on McIntosh MXA60?

Error code E01 or PROTECT indicates speaker protection has been triggered due to DC offset or overcurrent. Check output transistors for shorts and test DC offset at speaker terminals (should be less than 50mV). Inspect driver transistors and small signal transistors on the amplifier board.

What causes E02/TEMP error on McIntosh MXA60 amplifier?

E02 or TEMP error indicates amplifier overheating. Clean dust from heatsinks and internal fans, ensure fans are operational, and check for failing output transistors that may be causing excess heat.

Which capacitors fail most often in McIntosh MXA60?

The most common failure points are the main power supply filter capacitors and smaller electrolytics on regulation and control boards. Always use high-quality, low-ESR replacements with the same or higher voltage and temperature ratings.

What should I do if my McIntosh MXA60 has no power or display?

Check the main AC fuse first. Test the standby power supply for proper voltage (+/- 5V or 3.3V). Inspect for bulging or leaking primary power supply capacitors, particularly main filter caps and smaller electrolytics on the standby power supply.

McIntosh MXA60 Common Error Codes & Repair Guide

Complete reference guide for McIntosh MXA60 error codes with repair solutions and capacitor recommendations
Error Code	Description	Repair Solution	Common Capacitors to Check/Replace
E01 / PROTECT	Speaker protection triggered (DC offset, overcurrent)	Check output transistors for shorts. Test DC offset at speaker terminals (should be <50mV). Inspect driver transistors and small signal transistors on amp board.	Power supply filter caps, small electrolytics on protection circuit board.
E02 / TEMP	Amplifier overheating	Clean dust from heatsinks and internal fans. Ensure fans are operational. Check for failing output transistors causing excess heat.	Not primarily a cap issue, but check caps on fan power supply board if present.
No Display / No Power	Unit completely dead	Check main AC fuse. Test standby power supply for +/- 5V or 3.3V. Inspect for bulging/leaking primary power supply capacitors.	Main filter caps (high value, high voltage), smaller electrolytics on standby power supply.
Intermittent Operation	Audio cuts in/out, random faults	Reseat all internal ribbon cables and connectors. Check for cold solder joints, especially on large power supply pins and transformer connections.	All electrolytic capacitors on main power supply and amplifier modules. ESR meter testing recommended.

McIntosh MXA60 Common Error Codes & Repair Guide

General Capacitor Replacement Notes

Best Practices for McIntosh MXA60 Repair

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