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Products for Oberheim
Matrix 12 and Xpander
Manuals - Replacement Keys - Parts
Keyboard Service Center


Manuals
This is a comb-bound printed manual, NOS (new old stock) from Oberheim. While these are what Oberheim shipped with the keyboards, they are double-sided photocopied pages - not offset printed like most new manuals.
 
Oberheim Matrix-12 Owner's Manual (Part #M12MAN) $26.95


Replacement Keys
These plastic keys will replace broken ones on your keyboard. With the exception of the Top C note, all keys from octave to octave are identical, and all black keys within a given style are identical. In other words, a B note in the lowest octave uses the same key as a B note in any other octave. But the highest C note is different from the other C notes.

If you do not know the note names, on the 61-note keyboard shown below (OB-8, OB-Xa, etc.), the white keys from the bottom (left side) up are: C, D, E, F, G, A, B, and then the sequence repeats.

Oberheim Keyboard Notes

Click below to view keys for:
Matrix-12


Parts
We stock both new and used parts; the individual item descriptions will specify whether a part is NEW or USED. All used electronic parts are tested and guaranteed working. This listing reflects our current inventory and is updated daily, so if a part is shown with a "Buy" button, we should have it in stock.

If a part is shown as Out of Stock, then we do not have it, and in most cases, we don't know when or even if we might have it again. Your best bet is to simply check back on our site occasionally. If a part is not listed on our site, then we do not carry that part. We can no longer research or special order parts that are not listed here, and we just don't have time to answer questions about parts that we don't carry.

We want to help you get the parts you need, but please do not ask us to help diagnose problems with your equipment. We simply don't have the resources to do this, and it is just not practical to diagnose repair issues without being able to test the equipment in person.


Matrix 12, Xpander
Oberheim AC Socket AC socket/line filter (Part #4015)
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Oberheim Battery Battery (Part #4128)
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Oberheim Matrix Repair Part Clip for keyboard contact board, nylon, Matrix 12 (Part #4348)
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Oberheim Matrix Bubble Contact Strip Contact strip, single note, Matrix 12 (Part #4529)
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Oberheim Matrix Bubble Contact Strip Contact strip, 5-note, Matrix 12 (Part #4528)
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Oberheim Matrix Bubble Contact Strip Contact strip, 7-note, Matrix 12 (Part #4527)
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Diode Diode, 1N759 (Part #2876)
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Diode Diode, 1N4148 (Part #3788)
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Diode Diode, 1N4935 (Part #5711)
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Oberheim Display Board Display board, unpopulated, for Xpander (Part #5278)
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Oberheim Xpander Encoder Kit Encoder kit (Part #3466)
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Oberheim Xpander End Panel End panel, for Xpander (Part #5101)
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Fuse Holder Fuse holder (Part #3629)
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Integrated Circuit IC, 4012 dual-input NAND gate (Part #1783)
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Oberheim Matrix IC IC, 4016 quad analog switch (Part #3302)
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Integrated Circuit IC, 4027 dual flip-flop (Part #1263)
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Integrated Circuit IC, 4028 decoder (Part #1945)
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Oberheim Matrix IC IC, 4030 quad exclusive OR gate (Part #3303)
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Integrated Circuit IC, 4051 multiplexer (Part #4319)
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Integrated Circuit IC, 4053 multiplexer switch (Part #3413)
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Oberheim Xpander IC IC, 4503 tri-state hex buffer (Part #3045)
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Integrated Circuit IC, 68B50P ACIA chip (Part #1742)
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Integrated Circuit IC, 6N138 optocoupler (Part #2892)
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Integrated Circuit IC, 74C32N quad 2-input OR gate (Part #2971)
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Integrated Circuit IC, 74HC174 flip-flop (Part #4267)
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Integrated Circuit IC, 74HC32 quad logic gate (Part #5246)
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Oberheim Matrix Quad Gate Chip IC, 74LS00 quad gate (Part #3429)
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Integrated Circuit IC, 74LS02 quad NOR gate (Part #1757)
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Integrated Circuit IC, 74LS04 hex inverter (Part #3147)
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Oberheim Matrix IC IC, 74LS08 quad gate (Part #3394)
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Integrated Circuit IC, 74LS138 decoder/demultiplexer (Part #3251)
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Integrated Circuit IC, 74LS139 decoder/demultiplexer (Part #4263)
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Integrated Circuit IC, 74LS14N hex Schmitt trigger (Part #4420)
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Integrated Circuit IC, 74LS174 flip-flop (Part #3149)
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Integrated Circuit IC, 74LS244 buffer/line driver (Part #3424)
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Integrated Circuit IC, 74LS245 bus transceiver (Part #3395)
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Integrated Circuit IC, 74LS273 flip-flop (Part #4214)
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Integrated Circuit IC, 74LS32 quad gate (Part #4262)
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Integrated Circuit IC, 74LS367 buffer/line driver (Part #4224)
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Integrated Circuit IC, 74LS374 flip-flop (Part #4215)
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Integrated Circuit IC, 74LS393 dual binary counter (Part #5225)
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Integrated Circuit IC, 74LS42 monostable multivibrator (Part #4190)
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Integrated Circuit IC, 74LS74 dual flip-flop (Part #3396)
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Integrated Circuit IC, 74S00N quad gate (Part #4259)
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Integrated Circuit IC, 74S32N quad gate (Part #4185)
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Integrated Circuit IC, 7523JN 8-bit D/A converter (Part #5183)
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Integrated Circuit IC, ADC0804 A/D converter (Part #2710)
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Integrated Circuit IC, CEM3320 filter (Part #3717)
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Integrated Circuit IC, CEM3372 VCF/VCA (Part #1832)
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Integrated Circuit IC, CEM3374 VCO (Part #2887)
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Integrated Circuit IC, LM301 op amp (Part #3300)
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Integrated Circuit IC, LM311 comparator (Part #2560)
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Integrated Circuit IC, TL072 op amp (Part #3388)
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Integrated Circuit IC, TL074 op amp (Part #3714)
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Integrated Circuit IC, TL081 op amp (Part #4260)
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Integrated Circuit IC, TL082 op amp (Part #3423)
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Integrated Circuit IC, TL084 op amp (Part #4192)
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Oberheim Key Bushing Key bushing, Matrix 12 (Part #3216)
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Oberheim Matrix 6 Key Return Spring Key return spring, Matrix 12 (Part #KEYSP9)
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Oberheim Keyboard Contact Boards Keyboard contact boards, Matrix 12 (Part #3204)
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Oberheim MIDI Jack MIDI jack (Part #5085)
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Oberheim Panel Bushing Panel bushing, for encoders (Part #3571)
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Oberheim Panel Switch Panel switch, black (Part #2847)
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Oberheim Panel Switch Panel switches, pkg of 10 (Part #2847X)
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Oberheim Panel Switch Panel switch, black, with numeral '1' (Part #2904)
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Oberheim Panel Switch Panel switch, black, with numeral '2' (Part #2931)
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Oberheim Panel Switch Panel switch, black, with numeral '3' (Part #2901)
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Oberheim Panel Switch Panel switch, black, with numeral '6' (Part #2905)
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Oberheim Panel Switch Panel switch, black, with numeral '8' (Part #2927)
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Oberheim Panel Switch Panel switch, black, with numeral '9' (Part #2912)
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Oberheim Panel Switch Panel switch, red, for Store (Part #2888)
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Oberheim Phone Jack Phone jack, for Audio Outs, Gates, Chain Advance, Trigger (Part #1988)
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Oberheim Phone Jack Phone jack, for CV and Pedal Inputs (Part #4989)
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Oberheim Phone Jack Phone jack, mini, for Cassette In/Out (Part #7446)
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Oberheim Matrix Power Cord Power cord (Part #PC)
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Oberheim Power Supply Board Power supply board, unpopulated, Xpander only (Part #5359)
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Oberheim Processor Board Processor board, unpopulated, Matrix 12 only (Part #5361)
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Oberheim Processor Board Processor board, unpopulated, Xpander only (Part #5360)
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Oberheim Rubber Foot Rubber foot, for Matrix 12 (Part #1936)
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Transistor Transistor, 2N3904 (Part #5176)
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Transistor Transistor, 5172 (Part #3295)
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Transistor Transistor, IRF531 (Part #7445)
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Oberheim Voice Board Voice board, unpopulated (Part #5283)
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Voltage Regulator Voltage regulator, 7905 (Part #2255)
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Voltage Regulator Voltage regulator, 7812 (Part #1861)
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Voltage Regulator Voltage regulator, 7912 (Part #1739)
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