May 2021
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Roland BAK-1 GR Guitar Controller

Roland BAK-1 GR Bass Guitar Controller Assembly

Features and Specifications:

  • Divided Pickup #22382613
  • Pre-Amp Board #2292323001
  • Back Panel #22213490
  • 1 Knob (Large) 6 Knobs (Small)
  • Touch Plate (with vinyl wire)
  • Pickup base
  • 24P Connector 2324M-K with Lock Shell 24 L1
  • Jack SG-7713
  • Binding screw M3 x 10 (2), Oval-headed screw 3 x 20 mm (2), Self-tapping screw (flat-headed) (6) 2.6 x 10 mm, flat-headed
  • Washer M3 (4), lock nut M3 (4), Volume Washer (6), Volume Nut (6)
  • Spring 0.6 x 3.2 x 18 mm (2)
  • Shielded wire, Vinyl wire (black)
  • Jack washer
Roland BAK-1 Kit

Introduction to the Roland BAK-1 GR Bass Guitar Controller Assembly:

Roland sought to increase the user base of their guitar synthesizer players with the release of the STK-1, LPK-1 and BAK-1 retrofit kits. Up until this point, the only guitars or basses that worked with the vintage Roland 24-pin synths like the GR-300 or GR-33B were produced by the Fuji Roland partnership.

The BAK-1 is a kit consisting of the electronic components from the Roland G-77 bass guitar synthesizer controller, plus additional knobs, guitar back panel hardware, templates for guitar routing and miscellaneous wiring.

In all my years of searching for vintage Roland GR gear, I have seen only two BAK-1 kits offered for sale on ebay. They are rare.

Links to more information:

Photos:

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Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Roland BAK Roland BAK Roland BAK
Click on any image for larger view.

Videos:

Schematics Repairs - Service Bulletins:

There are no known service bulletins from Roland addressing any BAK-1 problems. The BAK-1 shares the same electronics as the Roland G-77 bass. Download the G-77 service manual (belowe) for BAK-1 schematics.