The AVR 51 has aggressive thermal cutoffs at 85°C (heatsink). The 134 UPD addendum includes a schematic to replace thermistor TH1 (10kΩ) with a 15kΩ resistor to raise the cutoff to 95°C—useful for 4-ohm loads but voids all safety certifications.
You can store up to 40 radio stations in the tuner's memory. Maintenance and Troubleshooting 표지 2008.11.18 2:54 PM 페이지 1 - Harman Kardon harman kardon avr 51 user manual 134 upd
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