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Roland U-20 Service Manual

Roland U-20
29 pages
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Roland U-20 Specifications

General IconGeneral
TypeDigital Synthesizer
Sound EngineLA Synthesis
Number of Keys61
Multitimbral8 parts
ROM2 MB
ControllersPitch Bend, Modulation Wheel
MIDIIn, Out, Thru
Release Date1989
Presets128
Dimensions1000 x 300 x 100 mm
EffectsChorus
OutputsL/Mono, R, Headphones
KeyboardVelocity Sensitive

Summary

Specifications

Keyboard Specifications

Details keyboard features like notes, velocity sensitivity, and channel aftertouch.

Sound Generator Specifications

Specifies sound generation capabilities, including simultaneous notes and sound patch details.

Internal Memory Specifications

Lists internal memory contents for setups, patches, chord sets, and timbres.

RAM Card Specifications

Outlines specifications for RAM Card (M-256E) contents like setups, patches, and timbres.

Exploded View

Keyboard Exploded View

Detailed diagram showing the exploded view of the keyboard assembly and its parts.

Key Removal Procedure

Step-by-step guide on how to safely remove a key from the keyboard mechanism.

Parts List

Wiring Diagrams

Block Diagram

Test Mode

Key and Button Test

Comprehensive test for all keyboard keys and front panel buttons, including velocity.

Memory Initialization

Resets temporary settings to factory defaults without affecting stored data.

Factory Data Load

Procedure to load factory preset data into the unit, often used after battery replacement.

Program ROM Replacement

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