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Equipment information:

Drum -- Sequential Circuits 420 TOM

Sequential Circuits
Model: 420 TOM
Date: 1985
Category: Professional music equipment
Group: Drum
Description: Digital Drum Machine

These manuals for the SequentialCirquits 420 TOM Drum
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Service Manual -- Sequential Circuits -- 420 TOM

Manual Type: Service Manual SequentialCirquits-10946-Manual-Page-1-Picture
Pages: 28
Size: 5.99 Mbytes (6278393 Bytes)
Language: english
Manual-ID/Number: TM420A
Date: 01 July 1985
Quality: Scanned document, all readable.
Upload date:
Downloads: 67 since 07 August 2018

SYSTEM/CHASSIS 0.1 Abnormal Power-on Indications 0.1 Updates 0-1 TOM 1_5 Software Update 0.1 Cassette Interface 0.1 Memory Loss 0.1 Figure 0.1 Location of Reset Modification 0.2 Figure 0.2 Original ROM Decoding Circuit 0.3 Figure 0.3 Original Reset Circuit 0A Expansion 0.5 Mechanical Disassembly/Reassembly 0.5 Functional Description 0.6 Main Operating System 0.6 Sound-Generating System 0.6 Hardware Description 0.7 Non-designated Components 0.7 1 PCBS 1 AND 2 1.1 Schematics for PCBs 1 and 2 Sheet A 1-3 Sheet B 1.^ Sheet C 1-5 Designator map, PCB 1 1.6 Hardware Description 1.7 Integrated Circuits 1.7 Other Components 1.17 Non-designated Components 1.19

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These manuals are for personal use only.

These documentations are only intended for qualified technicians who are aware of the respective safety regulations.

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