Equipment information

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

These manuals are available for the above equipment:

Manual Type Service Manual SequentialCirquits-10946-Manual-Page-1-Picture
Pages 28
Size 5.99 Mbytes (6278393 Bytes)
Language english
Revision
Manual-ID/Number TM420A
Date 01 July 1985
Quality Scanned document, all readable.
Upload date
MD5 a69a4f895dcb3ced3d894b5e438c3c47
Downloads 87 since 07 August 2018
Information
	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
SequentialCirquits-10946-Manual-Page-1-Picture


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