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Triple ARP Explorer I Synthesizer Repair – Synthchaser #157

I’ve got 3 broken ARP Explorer I synthesizers, and I show you my approach to repairing and restoring them. The ARP Explorer I (Model 2900) was ARP’s first non-preset single oscillator synthesizer, pre-dating the Axxe and the Solus. It includes the same 4027-1 Voltage Controlled Oscillator module found in the ARP 2600, and the same 4034 Moog Ladder Filter Voltage Controlled Filter module found in the ARP Pro Soloist.

  • Strain Relief Bushing Pulling Tool: https://amzn.to/3EE74fy
  • My desoldering tool: https://amzn.to/3PikaEf
  • Deoxit needle applicator: https://amzn.to/3PgiAT5
  • Deoxit pot cleaner: https://amzn.to/3sUGX1r
  • My oscilloscope: https://amzn.to/3rm6b8d

00:00 Intro to the Explorer I

05:10 Look Inside / Disassembly

12:13 Keybeds

13:35 Circuit Boards Depopulating & Cleaning

16:38 Cleaning Switches & Rotary Pots

21:24 Capacitors, ICs & Sliders

27:37 Bench Testing, Repair & Calibration