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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
With the exception of the Top C note, all keys from octave to octave are identical, and all black keys are identical. If you do not know the note names, you can refer to the diagram below.

ESQ-1's used two types of keys, so you will need to compare yours to our key photo to determine which you need. SQ-80's used two key types also; one type has a round foam pad on the underside of each key, the other does not.

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


Parts
We stock both NEW and USED parts; all used electronic parts are tested and guaranteed working.

This listing reflects our current inventory and is updated in real time. If a part has no Buy button and shows Out of Stock, it is typically out of production and we don't know when or if we might have it again. By including out of stock parts in our listings, we hope to offer customers a more complete and useful resource.

We cannot diagnose repair issues by phone or email. For technical questions, we suggest posting on our Forums, where our techs - as well as other users - can offer help.


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ESQ-1   ESQ-M   SQ-80  


ESQ-1
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, black (Part #4323)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1, gray (Part #4324)
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Ensoniq ESQ-1 Button Button, for metal-case ESQ-1, 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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Integrated Circuit IC, 138065002B keyboard controller (Part #3144)
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Integrated Circuit IC, 4051 multiplexer (Part #4319)
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Integrated Circuit IC, 5503000101 Q-chip (Part #4040)
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Integrated Circuit 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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Integrated Circuit IC, CEM3379 signal processor (Part #4064)
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Integrated Circuit IC, MC68B09EP microprocessor (Part #4042)
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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, 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 Memory Cartridge Memory cartridge, EEPROM (Part #ESQRAM)
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Ensoniq ESQ-1 Phone Jack Nut Nut for 1/4-inch phone jack, metal-case ESQ-1 (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 Outputs, Tape In & Out, Seq Ft Sw (Part #4177)
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Ensoniq Phone Jack Phone jack, plastic-case ESQ-1 Sustain (Part #4334)
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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, for CV Pedal (Part #4178)
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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 tact switch (Part #4004)
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Ensoniq Pushbutton Microswitch Pushbutton tact switches, pkg of 10 (Part #4004X)
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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 (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, metal-case ESQ-1 (Part #4507)
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Ensoniq ESQ-1 Volume/Data Slider Slide potentiometer, for Volume or Data, plastic-case ESQ-1 (Part #4005)
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Ensoniq ESQ-1 Pitch Bend Spring Spring, for pitch bend wheel (Part #4028)
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Spring Stop Ring Spring stop ring (Part #8085)
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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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Transistor Transistor, 2SB834 (Part #2577)
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Transistor Transistor, D880 (Part #2955)
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Transistor Transistor, MJE172G (Part #7151)
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Voltage Regulator Voltage regulator, 7805 (Part #2256)
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ESQ-M
Ensoniq ESQ-M AC Receptacle AC line filter/cord receptacle (Part #4015)
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Ensoniq ESQ-M Battery Battery (with instructions) (Part #4128)
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Ensoniq ESQ-M Button Button, black (Part #4323)
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Ensoniq ESQ-M Button Button, gray (Part #4324)
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Ensoniq ESQ-M Button Button, white (Part #4325)
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Ensoniq ESQ-M Fuse Holder Fuse holder (Part #4014)
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Ensoniq ESQ-M EPROM Chips IC, OS ver 1.1 EPROMs (Part #ESQMOS)
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Integrated Circuit IC, 4051 multiplexer (Part #4319)
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Integrated Circuit IC, 5503000101 Q-chip (Part #4040)
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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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Integrated Circuit IC, CEM3379 signal processor (Part #4064)
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Integrated Circuit IC, MC68B09EP microprocessor (Part #4042)
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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, TL4810AN display driver (Part #4332)
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Ensoniq ESQ-M Memory Cartridge Memory cartridge, EEPROM (Part #ESQRAM)
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Ensoniq ESQ-M Phone Jack Nut Nut for 1/4-inch phone jack (Part #4123)
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Ensoniq ESQ-M Phone Jack Phone jack, for Outputs, Tape In & Out, Seq Ft Sw (Part #4177)
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Ensoniq ESQ-M Phone Jack Phone jack, CV Pedal (Part #4178)
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Ensoniq ESQ-M Power Cord Power cord (Part #PC)
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Ensoniq ESQ-M Power Supply Power supply (Part #2886)
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Ensoniq ESQ-M Power Switch Power switch (Part #4020)
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Ensoniq ESQ-M Tact Switch Pushbutton tact switch (Part #4004)
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Ensoniq Pushbutton Microswitch Pushbutton tact switches, pkg of 10 (Part #4004X)
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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-M Slider Escutcheon Slider escutcheon (Part #4787)
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Ensoniq ESQ-M Slider Knob Slider knob (Part #4022)
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Ensoniq ESQ-M Volume/Data Slider Slide potentiometer, for Volume or Data (Part #4005)
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Transistor Transistor, 2SB834 (Part #2577)
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Transistor Transistor, D880 (Part #2955)
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Transistor Transistor, MJE172G (Part #7151)
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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 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 Board Display board (Part #4369)
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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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Integrated Circuit 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 Key Return Springs Key return springs, pkg of 10 (Part #KEYSP1X)
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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 SQ-80 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 Bend/Mod Wheel Panel Pitch bend/mod wheel panel (Part #4037)
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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 tact switch (Part #4004)
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Ensoniq Pushbutton Microswitch Pushbutton tact switches, pkg of 10 (Part #4004X)
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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 (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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Spring Stop Ring Spring stop ring (Part #8085)
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Ensoniq SQ-80 Transformer Transformer (Part #4340)
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Transistor Transistor, MJE182 (Part #2630)
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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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Voltage Regulator Voltage regulator, LM2925T (Part #2613)
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