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General| Type | Stereo Power Amplifier |
|---|---|
| Frequency Response | 5Hz to 50kHz |
| Input Sensitivity | 1V |
| Input Impedance | 10k ohms |
| Weight | 8.5 kg |
| Gain | 29dB |
| Signal to Noise Ratio | >100dB |
| Damping Factor | >100 |
Details the three versions of the LK2 amplifier: LK260, LK275, and LK280.
Methods to identify LK2 versions, including visual cues and serial numbers.
Visual comparison of PCAS 003 and PCAS 020 boards for identification.
Outlines responsibilities for Linn retailers and distributors regarding repairs.
Information on discontinued parts and Linn's support policy.
Guidance on navigating the manual, fault tables, and glossary.
Emphasizes proper mains connection and earthing for safety and function.
Cautionary note about the presence of lethal voltages inside the unit, advising against touching live parts.
Advice on locating the unit away from RF sources, heat, and humidity.
Guidelines for safe handling, anti-static precautions, and unit care.
Detailed instructions for safely removing the amplifier boards from the unit.
Procedures for detaching heatsinks from the circuit boards.
Instructions for re-attaching heatsinks and aligning components correctly.
Completing the re-assembly, refitting boards, sleeve, and performing a full test.
Guidance on common fault-finding strategies and avoiding typical pitfalls.
Advice on testing transistors and other components using an ohmmeter.
Symptoms like dead LED, no function, and causes like blown fuses or faulty leads.
Addresses intermittent operation, distortion, or poor sound quality.
Covers scenarios where only one amplifier channel fails to operate.
Troubleshooting a faulty power switch preventing unit shutdown.
Discusses causes such as wrong fuse type, mains surges, or voltage issues.
Addresses persistent fuse blowing due to transformer, rectifier, or capacitor issues.
Covers issues of no audio output from one or both channels, or tripping.
Explains the purpose and function of the channel protection circuitry.
Procedures for resetting the trip function after a shutdown event.
Identifies external system issues or internal amplifier faults causing continuous tripping.
Addresses symptoms of poor audio quality, distortion, or crackling noise.
Diagnosing DC voltage presence at the output terminals and related faults.
Key information, safety warnings, and handling advice for modifications.
Lists fault symptoms, affected units, required tools, and parts.
Step-by-step guide for dismantling, modifying, and re-assembling the amplifier.
