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Ensoniq ESQ-1/SQ-80
Replacement Keys & Parts
Replacement Keys - Parts
Keyboard Service Center


There were two versions of the ESQ-1 made, so you may need to know which version you have in order to get the correct parts. The early metal-case ESQ-1 has a metal front panel, and the 'ESQ-1' logo is directly over the pitch bend and mod wheels. The later plastic-case ESQ-1 has a plastic front panel, and the 'ESQ-1' logo is directly over the lowest notes of the keyboard.


Replacement Keys
These plastic keys will replace broken ones on your keyboard. Most of these replacement keys are used, but in fine condition; some are new. There are two different types of keys used on the ESQ-1 keyboards, so you will need to make sure you order the correct style. With the exception of the Top C note on the 61-note keyboards, 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 (see illustration below).

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

Ensoniq Keyboard Notes

Click below to view keys for:
ESQ-1 (with Style 39W keys*)   ESQ-1 (with Style 41W keys*)
SQ-80 (keys with circular foam pad)   SQ-80 (keys without foam pad)

* The 39W and 41W keys are identical, except for an extra 'foot' on the bottom of the 41W.


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.


View parts for:
ESQ-1, ESQ-M   SQ-80  


ESQ-1, ESQ-M
Ensoniq ESQ-1 AC Receptacle AC line filter/cord receptacle (Part #4015)
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Ensoniq ESQ-1 Battery Battery (with instructions) (Part #4128)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1 or ESQ-M, black (Part #4323)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1 or ESQ-M, gray (Part #4324)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1 or ESQ-M, white (Part #4325)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1, yellow (Part #4326)
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Ensoniq ESQ-1 Button Button, for plastic-case ESQ-1, black (Part #4108)
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Ensoniq ESQ-1 Button Button for plastic-case ESQ-1, gray (Part #4054)
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Ensoniq ESQ-1 Button Button for plastic-case ESQ-1, white (Part #4107)
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Ensoniq ESQ-1 Button Button for plastic-case ESQ-1, yellow (Part #4106)
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Ensoniq ESQ-1 Cartridge Receptacle Cartridge receptacle, with ribbon cable, for metal-case ESQ-1 only (Part #4031)
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Ensoniq ESQ-1 Cartridge Receptacle Cartridge receptacle, with ribbon cable, for plastic-case ESQ-1 only (Part #4056)
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Ensoniq ESQ-1 Contact Spring Holder Contact spring holder, with adjustment screw, for metal-case ESQ-1 and some plastic-case ESQ-1's (Part #4055)
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Ensoniq ESQ-1 Contact Spring Holder Contact spring holder, without adjustment screw, for some plastic-case ESQ-1's (Part #4125)
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Ensoniq ESQ-1 Keypad Board Data entry (keypad) board, metal-case ESQ-1 (Part #4693)
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Ensoniq ESQ-1 Keypad Board Data entry (keypad) board, plastic-case ESQ-1 (Part #4024)
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Ensoniq ESQ-1 Display Bezel Display bezel (Part #4048)
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Ensoniq ESQ-1 Display Board Display board, metal-case ESQ-1 (Part #3785)
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Ensoniq ESQ-1 Display Board Display board, plastic-case ESQ-1 (Part #4057)
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Ensoniq ESQ-1 Display Standoff Display standoff, metal-case ESQ-1 (Part #4788)
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Ensoniq ESQ-1 Display Standoff Display standoff, plastic-case ESQ-1 (Part #4362)
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Ensoniq ESQ-1 End Cap End cap, left, for metal-case ESQ-1 (Part #4881)
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Ensoniq ESQ-1 End Cap End cap, right, for metal-case ESQ-1 (Part #2776)
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Ensoniq ESQ-1 Fuse Holder Fuse holder (Part #4014)
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Ensoniq ESQ-1 EPROM Chips IC, OS ver 3.5 EPROMs (Part #ESQEPR)
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Ensoniq Keyboard Controller Chip IC, 138065002B keyboard controller (Part #3144)
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Ensoniq ESQ-1 Multiplexer Chip IC, 4051 multiplexer (Part #4319)
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Ensoniq ESQ-1 Q Chip IC, 5503000101 Q-chip (Part #4040)
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Ensoniq ESQ-1 Q Chip IC, 5503000301 Q-chip (Part #4789)
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Integrated Circuit IC, 74LS00 quad gate (Part #3429)
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Integrated Circuit IC, 74LS04 hex inverter (Part #3147)
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Integrated Circuit IC, 74LS245 bus transceiver (Part #3395)
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Integrated Circuit IC, 74LS373 flip-flop (Part #3051)
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Integrated Circuit IC, 74LS377 octal flip-flop (Part #5213)
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Integrated Circuit IC, 74LS74 dual flip-flop (Part #3396)
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Integrated Circuit IC, CEM3360 VCA chip (Part #4063)
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Ensoniq ESQ-1 Curtis 3379 Signal Processor Chip IC, CEM3379 signal processor (Part #4064)
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Ensoniq ESQ-1 Processor Chip IC, MC68B09EP microprocessor (Part #4042)
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Ensoniq ESQ-1 UART Chip IC, SCN2681A dual UART (Part #4065)
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Ensoniq ESQ-1 S/H Multiplex Chip IC, SSM2300 S/H multiplexer (Part #4045)
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Ensoniq Display Driver Chip IC, TL4810AN display driver (Part #4332)
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Ensoniq ESQ-1 Key Bushing Key bushing, for metal-case ESQ-1 (Part #4344)
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Ensoniq ESQ-1 Key Contact Spring Key contact spring (Part #4126)
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Ensoniq Key Contact Springs Key contact springs, package of 10 (Part #4126X)
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Ensoniq ESQ-1 Key Spring Key return spring (Part #KEYSPH)
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Ensoniq ESQ-1 Keybed Chassis Keybed chassis, plastic-case ESQ-1 (Part #4880)
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Ensoniq ESQ-1 Main Board Main board, metal-case ESQ-1 (Part #4694)
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Ensoniq ESQ-1 Main Board Main board, plastic-case ESQ-1 (Part #4113)
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Ensoniq ESQ-1 Phone Jack Nut Nut for 1/4-inch phone jack, metal-case ESQ-1 or ESQ-M (Part #4123)
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Ensoniq ESQ-1 Phone Jack Nut Nut for 1/4-inch phone jack, plastic-case ESQ-1 (Part #4061)
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Ensoniq ESQ-1 Phone Jack Phone jack, plastic-case ESQ-1 or ESQ-M Outputs, Tape In & Out, Seq Ft Sw (Part #4177)
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Ensoniq ESQ-1 Phone Jack Phone jack, metal-case ESQ-1, for all except CV Pedal (Part #4546)
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Ensoniq ESQ-1 Phone Jack Phone jack, CV Pedal (Part #4178)
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Ensoniq Phone Jack Phone jack, plastic-case ESQ-1 Sustain (Part #4334)
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Ensoniq ESQ-1 Pitch/Mod Wheel Pitch bend/mod wheel (plastic wheel only) (Part #4098)
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Ensoniq ESQ-1 Pitch/Mod Wheel Assembly Pitch bend/mod wheel assembly (Part #4035)
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Ensoniq ESQ-1 Pitch Bend/Mod Wheel Panel Pitch bend/mod wheel panel, metal-case ESQ-1 (Part #4036)
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Ensoniq ESQ-1 Pitch Bend/Mod Wheel Panel Pitch bend/mod wheel panel, plastic-case ESQ-1 (Part #5031)
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Ensoniq ESQ-1 Pitch/Mod Wheel Potentiometer Potentiometer, for pitch/mod wheel (Part #4510)
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Ensoniq ESQ-1 Power Cord Power cord (Part #PC)
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Ensoniq ESQ-1 Power Supply Power supply, for some metal-case ESQ-1's (Part #4626)
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Ensoniq ESQ-1 Power Supply Power supply, for some metal-case ESQ-1's (Part #4886)
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Ensoniq ESQ-1 Power Supply Power supply, for plastic-case ESQ-1 (Part #4058)
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Ensoniq ESQ-1 Power Switch Power switch (Part #4020)
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Ensoniq ESQ-1 Tact Switch Pushbutton microswitch (Part #4004)
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Ensoniq ESQ-1 Ribbon Cable Ribbon cable, display board to data entry board, all ESQ-1's (Part #4029)
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Ensoniq ESQ-1 Ribbon Cable Ribbon cable, main board to keyboard, for metal-case ESQ-1 (Part #4627)
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Ensoniq ESQ-1 Ribbon Cable Ribbon cable, main board to keyboard, 26-inch, for some plastic-case ESQ-1's (Part #4363)
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Ensoniq ESQ-1 Ribbon Cable Ribbon cable, main board to keyboard, 13-inch, for some plastic-case ESQ-1's (Part #4060)
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Ensoniq ESQ-1 Rubber Foot Rubber foot, for plastic-case and some metal-case ESQ-1's (Part #4021)
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Ensoniq ESQ-1 Rubber Foot Rubber foot, for some metal-case ESQ-1's (Part #4373)
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Ensoniq Rubber Stop Rubber stop, for pitch or mod wheel (Part #4606)
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Ensoniq ESQ-1 Plus Panel Screws Screws, package of 4, for front panel of some ESQ-1's (Part #3382)
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Ensoniq ESQ-1 Panel Screws Screws, package of 5, for front panel of some ESQ-1's (Part #3240)
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Ensoniq ESQ-1 Keybed Screws Screws, package of 10, for keybed (bottom panel) (Part #3850)
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Ensoniq Screws Screws, package of 10, for main board, display board, data entry board (Part #2141)
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Ensoniq ESQ-1 Sequencer Expander Cartridge Sequencer expander cartridge, 10,000-note (Part #SQX10)
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Ensoniq ESQ-1 Sequencer Expander Cartridge Sequencer expander cartridge, 20,000-note (Part #SQX20)
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Ensoniq ESQ-1 Sequencer Expander Cover Plate Sequencer expander cover plate, metal-case ESQ-1 (Part #4766)
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Ensoniq ESQ-1 Sequencer Expander Cover Plate Sequencer expander cover plate, plastic-case ESQ-1 (Part #4112)
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Ensoniq ESQ-1 Slider Escutcheon Slider escutcheon, metal-case ESQ-1 or ESQ-M (Part #4787)
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Ensoniq ESQ-1 Slider Knob Slider knob (Part #4022)
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Ensoniq ESQ-1 Volume/Data Slider Slide potentiometer, for Volume or Data (Part #4005)
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Ensoniq ESQ-1 Pitch Bend Spring Spring, for pitch bend wheel (Part #4028)
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Ensoniq ESQ-1 Transformer Transformer, 1450000301, for some plastic-case and some metal-case ESQ-1's (Part #4066)
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Ensoniq ESQ-1 Transformer Transformer, 1450000502, for some plastic-case ESQ-1's (Part #4340)
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Ensoniq ESQ-1 Transformer Transformer, for some metal-case ESQ-1's (Part #4887)
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Voltage Regulator Voltage regulator, 7805 (Part #2256)
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SQ-80
Ensoniq SQ-80 AC Receptacle AC line filter/cord receptacle (Part #4015)
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Ensoniq SQ-80 Battery Battery (with instructions) (Part #4861)
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Ensoniq SQ-80 Button Button, dark gray (Part #4051)
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Ensoniq SQ-80 Button Button, light gray (Part #4863)
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Ensoniq SQ-80 Button Button, red (Part #4864)
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Ensoniq SQ-80 Button Button, teal (Part #4865)
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Ensoniq SQ-80 Cartridge Receptacle Cartridge receptacle, with ribbon cable (Part #4031)
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Ensoniq ESQ-1 Display Board Display board (Part #4369)
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Ensoniq SQ-80 Disk Drive Disk drive (Part #4202)
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Ensoniq SQ-80 Disk Drive Faceplate Disk drive faceplate, black, for mounting Sony 420-2 drive in tall opening (Part #4003)
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Ensoniq SQ-80 Display Bezel Display bezel (Part #4048)
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Ensoniq SQ-80 Display Standoff Display standoff (Part #4683)
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Ensoniq SQ-80 Fuse Holder Fuse holder (Part #4014)
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Ensoniq SQ-80 EPROM Chips IC, OS ver 1.80 EPROMs (Part #SQ80EP)
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Integrated Circuit IC, 1772 disk drive controller (Part #4584)
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Integrated Circuit IC, 4028 decoder (Part #1945)
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Integrated Circuit IC, 4051 multiplexer (Part #4319)
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Ensoniq Q-Chip IC, 5503000301 Q-chip (Part #4789)
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Integrated Circuit IC, 6N138 optocoupler (Part #2892)
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Integrated Circuit IC, 7406 hex inverter (Part #3392)
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Integrated Circuit IC, 7407 hex buffer/driver (Part #3397)
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Integrated Circuit IC, 74LS00 quad gate (Part #3429)
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Integrated Circuit IC, 74LS04 hex inverter (Part #3147)
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Integrated Circuit IC, 74LS377 octal flip-flop (Part #5213)
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Integrated Circuit IC, 74LS74 dual flip-flop (Part #3396)
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Integrated Circuit IC, CEM3360 VCA chip (Part #4063)
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Integrated Circuit IC, CEM3379 signal processor (Part #4064)
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Integrated Circuit IC, D43256AC memory chip (Part #4337)
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Integrated Circuit IC, LM311 comparator (Part #2560)
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Integrated Circuit IC, SCN2681A dual UART (Part #4065)
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Integrated Circuit IC, SSM2300 S/H multiplexer (Part #4045)
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Integrated Circuit IC, TL081 op amp (Part #4260)
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Integrated Circuit IC, TL084CN op amp (Part #4192)
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Integrated Circuit IC, TL4810AN display driver (Part #4332)
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Ensoniq SQ-80 Key Bushing Key bushing (Part #4344)
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Ensoniq SQ-80 Key Spring Key return spring (Part #KEYSP1)
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Ensoniq SQ-80 Keybed Chassis Keybed chassis (Part #4696)
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Ensoniq SQ-80 Keyboard Coil Boards Keyboard coil boards, joined with ribbon cable (Part #4695)
Some SQ-80's use coil boards joined together with a soldered ribbon cable.

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Ensoniq SQ-80 Keyboard Coil Board Keyboard coil board, lower (Part #4371)
Some SQ-80's use two separate coil boards which join together with a brown connector.

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Ensoniq SQ-80 Keyboard Coil Board Keyboard coil board, upper (Part #4372)
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Ensoniq SQ-80 Keyboard Rebuild Kit Keyboard rebuild kit - eliminate the SQ-80's clacky keys! (Part #SQ80KC)
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Ensoniq SQ-80 KPC Board KPC circuit board (Part #4264)
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Ensoniq SQ-80 Main Board Main board (Part #4477)
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Ensoniq MIDI Jack MIDI jack (Part #5085)
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Ensoniq SQ-80 Phone Jack Nut Nut for 1/4-inch phone jack (Part #4061)
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Ensoniq SQ-80 Phone Jack Phone jack, for Left/Phones output (Part #4177)
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Ensoniq SQ-80 Phone Jack Phone jack, for Right/Mono output (Part #3089)
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Ensoniq SQ-80 Phone Jack Phone jack, for Sustain and Sequencer Ft Sw, Tape Out, Tape In (Part #4334)
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Ensoniq ESQ-1 Phone Jack Phone jack, for CV Pedal only (Part #4178)
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Ensoniq SQ-80 Pitch Bend/Mod Wheel Pitch bend/mod wheel (plastic wheel only) (Part #4098)
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Ensoniq SQ-80 Pitch/Mod Wheel Assembly Pitch bend/mod wheel assembly (Part #4035)
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Ensoniq SQ-80 Pitch/Mod Wheel Potentiometer Potentiometer, for pitch/mod wheel (Part #4510)
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Ensoniq SQ-80 Power Cord Power cord (Part #PC)
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Ensoniq SQ-80 Power Supply Board Power supply board (Part #4077)
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Ensoniq SQ-80 Power Switch Power switch (Part #4020)
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Ensoniq SQ-80 Tact Switch Pushbutton microswitch (Part #4004)
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Ensoniq SQ-80 Ribbon Cable Ribbon cable, main board to floppy drive (Part #4084)
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Ensoniq SQ-80 Ribbon Cable Ribbon cable, main board to keyboard (Part #4089)
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Ensoniq SQ-80 Rubber Foot Rubber foot (Part #4021)
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Ensoniq Rubber Stop Rubber stop, for pitch or mod wheel (Part #4606)
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Ensoniq SQ-80 Panel Screws Screws, package of 5, for SQ-80 front panel without brass inserts (Part #3240)
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Ensoniq SQ-80 Panel Screws Screws, package of 4, for SQ-80 front panel with brass inserts (Part #3382)
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Ensoniq Screws Screws, package of 4, for pitch bend/mod wheel panel (bottom panel) (Part #2198)
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Ensoniq SQ-80 Keybed Screws Screws, package of 10, for keybed (bottom panel) (Part #3292)
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Ensoniq Screws Screws, package of 10, for main board, display board (plastic-case ESQ-1 only) (Part #2141)
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Ensoniq SQ-80 Slider Knob Slider knob, plastic (Part #4022)
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Ensoniq SQ-80 Volume/Data Slider Slide potentiometer, for Volume or Data (Part #4005)
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Ensoniq SQ-80 Pitch Bend Spring Spring, for pitch bend wheel (Part #4028)
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Ensoniq SQ-80 Transformer Transformer (Part #4340)
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Voltage Regulator Voltage regulator, 7805 (Part #2256)
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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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