Note: A lot of equipment comes in various versions. Do not take this parts list as gospel; your equipment may very well differ. Aside from the obvious variances in model numbers and/or revisions, there may also be additional errors, typos, omissions, and straight-up mistakes.
Any work performed using this list as a guide is strictly at your own risk.
In general, when replacing electrolytic capacitors on power supplies, 105 degree, low-ESR/high-ripple capacitor types are advisable. Although they are going into music equipment, audio grade brands/models like Nichicon Muse are not optimal choices for power supply maintenance.
Here are some good PSU-ready electrolytic capacitors, ranked in typical order of preference:
Panasonic FM
Panasonic FC / Nichicon HE
Nichicon PW
Selecting a higher voltage capacitor (if that’s all that can be obtained) is almost always okay, but the capacitance must be the same as the OEM component. Most of these vintage PCBs have enough extra space that the physical size of the capacitors is not of paramount concern.
E-mu Emax (PSU – Model PS-430 [Y.K. Systems, made in Korea])
** Other PSU models will differ!! **
Voltages: P1 = -12v, P2 = +12v, P3 = GND, P4 = +5v
Fuse: 250v 2A [glass]
Zener Diodes
ZD1: not connected
ZD2: 5.6v Zener
Silicon Controlled Rectifier / Thyristor
SCR: S0506L, 6A OnState/IT(rms), 3.8A IT(avg), 50v VDRM, 1.5v VGT, 1.6v VTM, 6A ITM, TO220AB package (non-sensitive gate) [Teccor/Littelfuse]
** SCR, ZD2, and the glass fuse compose a “crowbar” protection circuit designed to protect the EMAX analog/digital boards **
Electrolytic Capacitors (radial)
C6/C7: 200v 100uF (85 degree) [Samyoung, high voltage!]; try 647-UPS2D101MHD (x2)
** Should be replaced simultaneously as a pair **
C11: 50v 22uF KM (105 degree) [black & tiny]; try 667-EEU-FM1H220
C16: 16v 1000uF (85 degree); try 667-EEU-FM1C102
C19: 6.3v 2200uF (85 degree); try 667-EEU-FM0J222L
C21: 16v 470uF (85 degree); ; try 667-EEU-FM1C471L
[Samyoung CERX, tall & orange, 105 degree]
C15/C17/C18: 10v 1000uF; try 667-EEU-FM1A102L (x3) or 647-UHE1A102MPD6 (x3)
C20: 25v 470uF; try 667-EEU-FM1E471L
Polyester/Mylar (Poly) Capacitors
C1/C4/C5: MTK (Metallized Polyester type), 0.1uF 250v (1% tolerance)
C9: 104k, 0.1uF 630v (10% tolerance)
Ceramic Capacitors
C12: 104, 0.1uF
Rectifier Diode Bridge
D1: PBP205, bridge rectifier diode (2A, 600v, silicon) [Diotec]; try RS205L [Rectron] or NTE169 [NTE Semiconductors] or 2KBP06M-E4 [Vishay]
NPN Transistors
Q1: TIP50, NPN Silicon Transistor (5v emitter-base) [PEKOR]; try STMicroelectronics TIP50 or Fairchild TIP50
Q2: MJE13007A, NPN Silicon Bipolar Power Transistor (9v emitter-base) [PEKOR, large & thick heatsink]; try MJE13007G [ON Semiconductor]
Voltage Regulators
Q6: UA7812, 78xx series +12v output [Texas Instruments]; try 595-UA7812CKCT [TI]
Opto-isolator/Photocoupler
PC1: CQY80n [Vishay]
Roland D50
PSU Electrolytic Capacitors
C7/C8: 2200uF 35v; try Nichicon UHE1V222MHD (x2)
C6: 6800uF 25v; try Nichicon UPS1E682MHD
C15/C18: 47uF 25v; try Panasonic EEU-FM1E470B (x2)
C9: 47uF 16v; try Nichicon UKL1C470KEDANA
C11: 1uF 50v; try Nichicon UKL1H010KDDANA
Ensoniq Mirage
PSU Electrolytic Capacitors
C16: 1000uF, 25v; try PANASONIC EEU-FM1E102
C7/12/14/15: 10uF, 35v; try NICHICON UPW1V100MDD6 (x4)
C10/20: 3300uF, 25v; try NICHICON UHE1E332MHD (x2)
C6/C17: 4700uF, 16v; try NICHICON UHE1C472MHD6 (x2)
PSU Voltage Regulators
7908 [-8v, Fairchild]; try Fairchild LM7908CT
7812c [+12v, Motorola]; try Fairchild LM7812CT
UA7805c [+5, TI]; try TI UA7805CKCS (x2!)
Ensoniq ESQm
Large PSU Electrolytic Capacitors
C1/C8: 3300uF, 35V; try Nichicon UHE1V332MHD (x2)
C17/C18: 4700uF, 16V; try Nichicon UHE1C472MHD6 (x2)
Small PSU Electrolytic Capacitors
C3/C6: 10uF, 35v; ; try 647-UPW1V100MDD (x2)
C11/C13: 470uF, 63V; try Nichicon UHE1J471MHD6 (x2)
C15: 22uF, 16v; try UKL1C220KDDANA
Battery & Sled/Holder
CR123A 3V 1400mAh backup battery; try 658-CR123A
Holder; try 534-1051
Ensoniq ESQ1
** The ESQ1 differs from the ESQm!! **
Large PSU Electrolytic Capacitors
C1/C8: 3300uF, 25V
C17/C18: 4700uF, 16V; try Nichicon UHE1C472MHD6 (x2)
Small PSU Electrolytic Capacitors
C12: 220uF, 35V; try Panasonic EEU-FM1V221
C10: 100uF, 35V; try Nichicon UPM1V101MPD
C11/C13: 470uF, 63V; try Nichicon UHE1J471MHD6 (x2)
Yamaha TX16W
PSU Electrolytic Capacitors
47uF, 50v (x2); try Nichicon UKL1H470KPDANA
1uF, 50v (x1); try Nichicon 647-UTT1H010MDD
100uF, 200v (x2); try 647-UPS2D101MHD
1000uF, 50v (x2); try UHE1H102MHD3
2200uF, 10v (x2); try UHE1A222MHD3
1000uF, 16v (x1); try Panasonic EEU-FM1C102
470uF, 16v (x2); try Panasonic EEU-FM1C471L
Input Board Electrolytic Capacitors
10uF, 16v (x5); try Nichicon UPS1C100MDD
470uF, 6.3v (x2); try Nichicon UHV0J471MED
Casio CZ-101 / CZ-1000
DC Power Jack
(3-pin, switched type); try RAPC722X or KLDX-0202-A
Thump Eliminator Relay (SPDT 1C-style, subminiature 6-pin, through-hole/PCB, 5VDC signal relay)
OMRON G2E-187P-H-B (DC5V); try NTE R21-5D2-5/6 or HONGFA HFD41-05
Supercapacitor
NEC FZ0H473Z (5.5v, 47,000uF/0.047F); try Elna DHL-5R5D473T
Tri-state Buffer
Texas Instruments 74HC241; try 595-CD74HC241E
Electrolytic Capacitors (M4152-MA2M PCB)
3.3uF, 50v (x3); try Panasonic EEU-FC1H3R3
100uF, 6.3v; try Nichicon UVZ0J101MDD
100uF, 16v (x2); try Nichicon UKL1C101KPDANA
330uF, 16v; try Panasonic EEU-FM1C331
47uF, 16v (x2); try Nichicon UKL1C470KEDANA
1000uF, 6.3v (x2); try Panasonic EEU-FM0J102
2200uF, 16v; try Panasonic EEU-FM1C222
1uF, 50v; try Nichicon 647-UTT1H010MDD
10uF, 16v; try Nichicon UPS1C100MDD
22uF, 10v; try Nichicon 647-UPW1A220MDD
0.22uF, 50v; try Nichicon USP1HR22MDD
** This is an unusual bi-polar (no polarity) style capacitor. **
Electrolytic Capacitors (M4152-MA1M PCB)
1000uF, 6.3v (x2); try Panasonic EEU-FM0J102
47uF, 6.3v (x4); try Nichicon UVZ0J470MDD
330uF, 6.3v; try Panasonic EEU-FM0J331
470uF, 6.3v (x2); try Nichicon UVZ0J471MED
100uF, 6.3v; try Nichicon UVZ0J101MDD
3.3uF, 50v; try Panasonic EEU-FC1H3R3
1uF, 50v; try Nichicon 647-UTT1H010MDD
Casio RZ-1
Sample Tone Knobs
10K Pots, straight side exit terminals; try Bourns 3310C-101-103L
** These are adequate but not quite a perfect alignment. Two 0.125″/3.18mm flat-shaft knobs are also recommended for aesthetics. **
Battery Holder
CR2032 Coin Battery Holder/Clip; try 122-7520-GR
Relays
** The RZ-1 contains two similar yet different relays. **
OMRON G2E-187P-H-M 5VDC (mainboard); try NTE R21-5D2-5/6 or HONGFA HFD41-05
OMRON G2VN 237 PL 5VDC (fader board); try OMRON G5V-2-DC5
MT Jack Cable (as an external connector, *NOT* an internal jack replacement)
8-pin DIN male connector, try Kobiconn (171-0278)
PSU Electrolytic Capacitors
16V 4700uf; try Nichicon UHE1C472MHD
50v 4.7uf; try Nichicon UHE1H4R7MDD or Panasonic EEU-FC1H4R7
50V 1uf; try Nichicon UKL1H010KDDANA
50V 3.3uf; try Panasonic EEU-FC1H3R3
10V 220uf (x2); try Panasonic FM EEU-FM1A221
16V 47uf (x2); try Nichicon UKL1C470KEDANA
6.3V 470uf (x2); try Nichicon UVZ0J471MED
Larger Electrolytic Capacitors (on mainboard)
6.3V 470uf (x4), try Nichicon UVZ0J471MED
Fuses: 250V 0.5A and 125V 2A
Sockets (optional)
Numerous ICs can use DIP-28 sockets (2.54mm x 15.24mm) when being replaced; try 3M 4828-6000-CP
Yamaha SPX1000
PSU Electrolytic Capacitors (radial)
C19/20/21/22: 330uF 25v; try 647-UHE1E331MPD6 (x4)
C23/24: 1000uF 10V; try 647-UHE1A102MPD6 (x2)
C11 (largest): 100uF 200v; try 647-UPS2D101MHD
C33 (smallest): 1uF 50v; try 647-UTT1H010MDD
Diodes (axial)
D6/D7: 11DQ06, Vishay schottky rectifier diodes — 60v,1.1A; try SB160-E3/54 (x2)
D8: 31DF1, Vishay fast recovery diode; try STTH302RL
Roland JX8P
PSU Electrolytic Capacitors
C1/2: 35V 4700uf, try Nichicon UPW1V472MHD (x2)
C3: 25V 6800uf, try Nichicon UPW1E682MHD
C4: 50V 1uf, try Nichicon UKL1H010KDDANA
C5/8/9: 16v 100uf, try Nichicon UKL1C101KPDANA (x3)
L/M/H Output Level and/or Memory Protect Switch
10-pin (2×5), 3-way horizontal/right-angle slide switch [SSP323-9PS, Alps]
** This is nearly impossible to find a drop-in replacement for. **
Ensoniq EPS16+ Rack
PSU Electrolytic Capacitors
C2/10/11/13: 63V 10uF (small); try Nichicon UPW1J100MDD (x4)
C7/12: 63V 470uF (medium), try Nichicon UHE1J471MHD6 (x2)
C3/17/18: 25V 4700uF (large), try Nichicon UHE1E472MHD (x3)
C6/5: 50V 3300uF (jumbo), try Panasonic ECA-1HHG332 (x2)
Floppy Controller
VLSI VL1772-02PC; replace with same or WD1772
DIP28 caddy/socket, 2.54mm x 15.24mm (optional); try 3M 4828-6000-CP
Frontier Tango24
PSU / AC Power Adapter
The large stock external brick-style power adapter can be replaced with a Wearnes WDS 050120 or an MG Electronics MGT-1250. Use a 2.1mm x 5mm barrel jack connector, MG Electronics MGW321MM is a convenient match with the MGT-1250.
** The power supply needs to be about 10VAC, 4A. It is NOT a DC adapter which is what makes it such an unusual and hard-to-find piece! **
Ensoniq DP/2
The power supply uses an odd combination of +5V, +12V and -12V. A traditional ATX computer power supply is relatively easy to modify into a compatible PSU for the DP/2, but must be tricked into powering on and is noisier than the stock PSU because of the fan. A better option is a generic/Meanwell T-30B triple output PSU with a male DIN-6 cable attached.
Battery Holder
CR2032 Coin Battery Holder/Clip; try 122-7520-GR