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Ensoniq ESQ-1/SQ-80
Replacement Keys & Parts
Replacement Keys - Parts

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.

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 look nearly 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
	AC line filter/cord receptacle (Part #4015) View details for this product
	Battery (with instructions) (Part #4128) View details for this product
	Button, for metal-case ESQ-1 or ESQ-M, black (Part #4323) View details for this product
	Button, for metal-case ESQ-1 or ESQ-M, gray (Part #4324) View details for this product
	Button, for metal-case ESQ-1 or ESQ-M, white (Part #4325) View details for this product
	Button, for metal-case ESQ-1, yellow (Part #4326) View details for this product
	Button, for plastic-case ESQ-1, black (Part #4108) View details for this product
	Button for plastic-case ESQ-1, gray (Part #4054) View details for this product
	Button for plastic-case ESQ-1, white (Part #4107) View details for this product
	Button for plastic-case ESQ-1, yellow (Part #4106) View details for this product
	Cartridge receptacle, with ribbon cable, for metal-case ESQ-1 only (Part #4031) View details for this product
	Cartridge receptacle, with ribbon cable, for plastic-case ESQ-1 only (Part #4056) View details for this product
	Contact spring holder, with adjustment screw, for metal-case ESQ-1 and some plastic-case ESQ-1's (Part #4055) View details for this product
	Contact spring holder, without adjustment screw, for some plastic-case ESQ-1's (Part #4125) View details for this product
	Data entry (keypad) board, metal-case ESQ-1 (Part #4693) View details for this product
	Data entry (keypad) board, plastic-case ESQ-1 (Part #4024) View details for this product
	Display bezel (Part #4048) View details for this product
	Display board, metal-case ESQ-1 (Part #3785) View details for this product
	Display board, plastic-case ESQ-1 (Part #4057) View details for this product
	Display standoff, metal-case ESQ-1 (Part #4788) View details for this product
	Display standoff, plastic-case ESQ-1 (Part #4362) View details for this product
	End cap, left, for metal-case ESQ-1 (Part #4881) View details for this product
	End cap, right, for metal-case ESQ-1 (Part #2776) View details for this product
	Fuse holder (Part #4014) View details for this product
	IC, OS ver 3.5 EPROMs (Part #ESQEPR) View details for this product
	IC, 138065002B keyboard controller (Part #3144) View details for this product
	IC, 4051 multiplexer (Part #4319) View details for this product
	IC, 5503000101 Q-chip (Part #4040) View details for this product
	IC, 5503000301 Q-chip (Part #4789) View details for this product
	IC, 74LS00 quad gate (Part #3429) View details for this product
	IC, 74LS04 hex inverter (Part #3147) View details for this product
	IC, 74LS245 bus transceiver (Part #3395) View details for this product
	IC, 74LS373 flip-flop (Part #3051) View details for this product
	IC, 74LS377 octal flip-flop (Part #5213) View details for this product
	IC, 74LS74 dual flip-flop (Part #3396) View details for this product
	IC, CEM3360 VCA chip (Part #4063) View details for this product
	IC, CEM3379 signal processor (Part #4064) View details for this product
	IC, MC68B09EP microprocessor (Part #4042) View details for this product
	IC, SCN2681A dual UART (Part #4065) View details for this product
	IC, SSM2300 S/H multiplexer (Part #4045) View details for this product
	IC, TL4810AN display driver (Part #4332) View details for this product
	Key bushing, for metal-case ESQ-1 (Part #4344) View details for this product
	Key contact spring (Part #4126) View details for this product
	Key contact springs, package of 10 (Part #4126X) View details for this product
	Key return spring (Part #KEYSPH) View details for this product
	Keybed chassis, plastic-case ESQ-1 (Part #4880) View details for this product
	Main board, metal-case ESQ-1 (Part #4694) View details for this product
	Main board, plastic-case ESQ-1 (Part #4113) View details for this product
	Memory cartridge, EEPROM (Part #ESQRAM) View details for this product
	Nut for 1/4-inch phone jack, metal-case ESQ-1 or ESQ-M (Part #4123) View details for this product
	Nut for 1/4-inch phone jack, plastic-case ESQ-1 (Part #4061) View details for this product
	Phone jack, plastic-case ESQ-1 or ESQ-M Outputs, Tape In & Out, Seq Ft Sw (Part #4177) View details for this product
	Phone jack, metal-case ESQ-1, for all except CV Pedal (Part #4546) View details for this product
	Phone jack, CV Pedal (Part #4178) View details for this product
	Phone jack, plastic-case ESQ-1 Sustain (Part #4334) View details for this product
	Pitch bend/mod wheel (plastic wheel only) (Part #4098) View details for this product
	Pitch bend/mod wheel assembly (Part #4035) View details for this product
	Pitch bend/mod wheel panel, metal-case ESQ-1 (Part #4036) View details for this product
	Pitch bend/mod wheel panel, plastic-case ESQ-1 (Part #5031) View details for this product
	Potentiometer, for pitch/mod wheel (Part #4510) View details for this product
	Power cord (Part #PC) View details for this product
	Power supply, for some metal-case ESQ-1's (Part #4626) View details for this product
	Power supply, for some metal-case ESQ-1's (Part #4886) View details for this product
	Power supply, for plastic-case ESQ-1 (Part #4058) View details for this product
	Power switch (Part #4020) View details for this product
	Pushbutton tact switch (Part #4004) View details for this product
	Pushbutton tact switches, pkg of 10 (Part #4004X) View details for this product
	Ribbon cable, display board to data entry board, all ESQ-1's (Part #4029) View details for this product
	Ribbon cable, main board to keyboard, for metal-case ESQ-1 (Part #4627) View details for this product
	Ribbon cable, main board to keyboard, 26-inch, for some plastic-case ESQ-1's (Part #4363) View details for this product
	Ribbon cable, main board to keyboard, 13-inch, for some plastic-case ESQ-1's (Part #4060) View details for this product
	Rubber foot, for plastic-case and some metal-case ESQ-1's (Part #4021) View details for this product
	Rubber foot, for some metal-case ESQ-1's (Part #4373) View details for this product
	Rubber stop, for pitch or mod wheel (Part #4606) View details for this product
	Screws, package of 4, for front panel of some ESQ-1's (Part #3382) View details for this product
	Screws, package of 5, for front panel of some ESQ-1's (Part #3240) View details for this product
	Screws, package of 10, for keybed (bottom panel) (Part #3850) View details for this product
	Screws, package of 10, for main board, display board, data entry board (Part #2141) View details for this product
	Sequencer expander cartridge, 10,000-note (Part #SQX10) View details for this product
	Sequencer expander cartridge, 20,000-note (Part #SQX20) View details for this product
	Sequencer expander cover plate, metal-case ESQ-1 (Part #4766) View details for this product
	Sequencer expander cover plate, plastic-case ESQ-1 (Part #4112) View details for this product
	Slider escutcheon, metal-case ESQ-1 or ESQ-M (Part #4787) View details for this product
	Slider knob (Part #4022) View details for this product
	Slide potentiometer, for Volume or Data (Part #4005) View details for this product
	Spring, for pitch bend wheel (Part #4028) View details for this product
	Transformer, 1450000301, for some plastic-case and some metal-case ESQ-1's (Part #4066) View details for this product
	Transformer, 1450000502, for some plastic-case ESQ-1's (Part #4340) View details for this product
	Transformer, for some metal-case ESQ-1's (Part #4887) View details for this product
	Transistor, 2SB834 (Part #2577) View details for this product
	Transistor, D880 (Part #2955) View details for this product
	Transistor, MJE172G (Part #7151) View details for this product
	Voltage regulator, 7805 (Part #2256) View details for this product

SQ-80
	AC line filter/cord receptacle (Part #4015) View details for this product
	Battery (with instructions) (Part #4861) View details for this product
	Button, dark gray (Part #4051) View details for this product
	Button, light gray (Part #4863) View details for this product
	Button, red (Part #4864) View details for this product
	Button, teal (Part #4865) View details for this product
	Cartridge receptacle, with ribbon cable (Part #4031) View details for this product
	Display board (Part #4369) View details for this product
	Disk drive (Part #4202) View details for this product
	Disk drive faceplate, black, for mounting Sony 420-2 drive in tall opening (Part #4003) View details for this product
	Display bezel (Part #4048) View details for this product
	Display standoff (Part #4683) View details for this product
	Fuse holder (Part #4014) View details for this product
	IC, OS ver 1.80 EPROMs (Part #SQ80EP) View details for this product
	IC, 1772 disk drive controller (Part #4584) View details for this product
	IC, 4028 decoder (Part #1945) View details for this product
	IC, 4051 multiplexer (Part #4319) View details for this product
	IC, 5503000301 Q-chip (Part #4789) View details for this product
	IC, 6N138 optocoupler (Part #2892) View details for this product
	IC, 7406 hex inverter (Part #3392) View details for this product
	IC, 7407 hex buffer/driver (Part #3397) View details for this product
	IC, 74LS00 quad gate (Part #3429) View details for this product
	IC, 74LS04 hex inverter (Part #3147) View details for this product
	IC, 74LS377 octal flip-flop (Part #5213) View details for this product
	IC, 74LS74 dual flip-flop (Part #3396) View details for this product
	IC, CEM3360 VCA chip (Part #4063) View details for this product
	IC, CEM3379 signal processor (Part #4064) View details for this product
	IC, D43256AC memory chip (Part #4337) View details for this product
	IC, LM311 comparator (Part #2560) View details for this product
	IC, SCN2681A dual UART (Part #4065) View details for this product
	IC, SSM2300 S/H multiplexer (Part #4045) View details for this product
	IC, TL081 op amp (Part #4260) View details for this product
	IC, TL084CN op amp (Part #4192) View details for this product
	IC, TL4810AN display driver (Part #4332) View details for this product
	Key bushing (Part #4344) View details for this product
	Key return spring (Part #KEYSP1) View details for this product
	Keybed chassis (Part #4696) View details for this product
	Keyboard coil boards, joined with ribbon cable (Part #4695) Some SQ-80's use coil boards joined together with a soldered ribbon cable. View details for this product
	Keyboard coil board, lower (Part #4371) Some SQ-80's use two separate coil boards which join together with a brown connector. View details for this product
	Keyboard coil board, upper (Part #4372) View details for this product
	Keyboard rebuild kit - eliminate the SQ-80's clacky keys! (Part #SQ80KC) View details for this product
	KPC circuit board (Part #4264) View details for this product
	Main board (Part #4477) View details for this product
	MIDI jack (Part #5085) View details for this product
	Nut for 1/4-inch phone jack (Part #4061) View details for this product
	Phone jack, for Left/Phones output (Part #4177) View details for this product
	Phone jack, for Right/Mono output (Part #3089) View details for this product
	Phone jack, for Sustain and Sequencer Ft Sw, Tape Out, Tape In (Part #4334) View details for this product
	Phone jack, for CV Pedal only (Part #4178) View details for this product
	Pitch bend/mod wheel (plastic wheel only) (Part #4098) View details for this product
	Pitch bend/mod wheel assembly (Part #4035) View details for this product
	Potentiometer, for pitch/mod wheel (Part #4510) View details for this product
	Power cord (Part #PC) View details for this product
	Power supply board (Part #4077) View details for this product
	Power switch (Part #4020) View details for this product
	Pushbutton tact switch (Part #4004) View details for this product
	Pushbutton tact switches, pkg of 10 (Part #4004X) View details for this product
	Ribbon cable, main board to floppy drive (Part #4084) View details for this product
	Ribbon cable, main board to keyboard (Part #4089) View details for this product
	Rubber foot (Part #4021) View details for this product
	Rubber stop, for pitch or mod wheel (Part #4606) View details for this product
	Screws, package of 5, for SQ-80 front panel without brass inserts (Part #3240) View details for this product
	Screws, package of 4, for SQ-80 front panel with brass inserts (Part #3382) View details for this product
	Screws, package of 4, for pitch bend/mod wheel panel (bottom panel) (Part #2198) View details for this product
	Screws, package of 10, for keybed (bottom panel) (Part #3292) View details for this product
	Screws, package of 10, for main board, display board (plastic-case ESQ-1 only) (Part #2141) View details for this product
	Slider knob, plastic (Part #4022) View details for this product
	Slide potentiometer, for Volume or Data (Part #4005) View details for this product
	Spring, for pitch bend wheel (Part #4028) View details for this product
	Transformer (Part #4340) View details for this product
	Voltage regulator, 7805 (Part #2256) View details for this product
	Voltage regulator, 7812 (Part #1861) View details for this product
	Voltage regulator, 7912 (Part #1739) View details for this product

 

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