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Fixed BIAS system with user-adjustable trim pots and LED indicators for monitoring.
Initial setup and operational precautions before first use, including emergency unplugging.
Steps for unboxing and verifying all package contents are present.
Instructions for correctly inserting the KT120 power tubes into their respective sockets.
Guide to the initial power-on sequence and the soft-start protection circuit.
Detailed procedure for checking and adjusting the tube BIAS settings using front panel controls.
Explanation of the automatic system that safeguards the unit from faults and overloads.
Details on the circuit protecting components from high inrush currents during power-on.
Diagram showing the correct placement of output and driver tubes (V1-V7).
Detailed explanation of the BIAS measurement and adjustment feature, including LED indicators.
Step-by-step guide for setting the tube BIAS correctly using the front panel controls.
Instructions for replacing output and driver tubes, including general procedures and warnings.
Analysis of causes, particularly ground loops, and procedures for resolving speaker hum.
Identification of symptoms and troubleshooting steps for faulty output tubes.
Identification of symptoms and troubleshooting steps for faulty driver tubes.
Guide to identifying faulty vacuum tubes, referencing troubleshooting section.
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