$39.99 Buy It Now or Best Offer
free,30-Day Returns
Seller Store usart009
(137) 100.0%,
Location: Tampa, Florida
Ships to: US,
Item: 146143247193
Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Marantz:Marantz
Compatible Model:2385, 2500
MPN:MZ-CAP-1
This kit is designed to replace both dual electrolytic capacitors used in the Marantz 2385 and 2500 with four modern-production, Kemet ALS80-A-DF series screw-in capacitors (sold separately). A custom capacitor mounting board attaches to the Marantz via four pre-existing screw holes. Wiring is done from the bottom of the unit and is made easier by the use of robust wiring turrets. Footprints are provided for installing the bleeder resistors on the circuit board, but they can also be left where they are and attached to the wiring turrets. The mounting board itself is manufactured with double-sided 2 ounce copper and large copper pours to ensure very low impedance connections to the turrets, a 2.4 mm thick FR-4 laminate to reduce board flex, and a gold finish. Note that the listing installation photos are of the previous revision of this board. The new revision fits the same but has a few minor improvements. Includes one capacitor mounting board, the necessary board mounting hardware, 16 AWG wire for making the ground connections, an installation guide. New capacitors and capacitor screws are not included; please refer to the section titled “What You Will Need” below: What You Will Need The mounting board was designed to fit four Kemet ALS80A822DF100, an 8200 uF/100 V screw-in capacitor with M5-0.8 threads. These do not ship with the necessary screws, so you will also need eight M5-0.8 x 12 mm machine screws with head diameter 11 mm or less (e.g. McMaster-Carr 90403A868). The dimensions of the Kemet capacitors are 36 mm diameter, 107 mm height, 12.80 mm CTC mounting stud spacing. I recommend using this specific part (or one in the same family, ALS80-A-DF). If you need to select a different capacitor, there are some important caveats listed below:- Make sure the capacitor diameter does not exceed 36 mm and the height does not exceed 107 mm, otherwise the capacitors may not fit on the board or inside the unit- Make sure the screw stud spacing is 12.80 mm and the thread type is no larger than M5-0.8, otherwise the screws may not fit through the holes in the board- Make sure the rubber plug for the capacitor’s pressure relief vent aligns with the hole on the mounting board. You may need to drill new holes if the orientation of your capacitor’s positive and negative terminals differs- This kit includes a set of spacer boards for each Kemet ALS80-A-DF style capacitor that account for the length of the mounting studs to reduce mechanical stress on the mounting board. If you select different capacitors that have long mounting studs, the included spacers may not fit If you have any doubts about the fitment of your choice of replacement capacitors, feel free to send me a message. You will need the usual tools and equipment involved in servicing stereo equipment (pliers, wire cutters, variable temperature soldering iron, multimeter, etc.) This kit requires some skill and experience to install, so if you are not thoroughly familiar with repairing electronics at the component level, please have a qualified service center install it for you. Note that due to the slight increase in capacitance with the Kemet 8200uF capacitors compared to the original parts, you may wish to replace the original bridge rectifiers with parts capable of handling higher continuous and peak surge currents due to the increase in power-on inrush current. For reference, the Marantz 2500 schematic indicates that it uses two S5VB40 bridge rectifiers, which are rated for 6 A continuous current (when bolted to a heat sink, i.e. the chassis), 200 A peak surge forward current, and 600 V maximum reverse voltage. The 2385 uses two S5VB20, which have the same current ratings but are rated for 200 V maximum reverse voltage. Installation An install guide is included with the unit, but is also briefly listed below:- Take pictures or make diagrams of the color codes that were used to wire up the original capacitors in your unit- Remove the original capacitors and mounting brackets. Try to save as much wire length as possible- Install the four included threaded standoffs to the Marantz subchassis with the included hex nuts- Place all turrets on the “Turret Side” of the board. Flip the board over and crimp them with snub nose pliers so that they are mechanically secure, then solder them in place- Place five of the included spacer boards over the mounting studs of each capacitor. Make sure the third hole on the spacers all align with the cap’s pressure relief vent- Mount the screw-in capacitors on the “Capacitor Side” of the board. Silkscreen references are included on the board to indicate polarity; be sure to triple check that they are installed correctly!- If you want to install the two bleeder resistors on the mounting board, do so at this time. Place them on the “Capacitor Side” of the board. Per the original Marantz schematic, they connect from the negative rails to ground- Mount the assembled board in place with the four included screws- Turn the unit upside down. All of the wiring turrets can be seen through the two round holes in the bottom of the chassis. After confirming the color codes with the diagram or pictures taken at the beginning, strip back each wire about 1/4″, insert them into the center holes of their respective turrets (or wrap them around the turrets), and solder them in place. The turrets labeled V+ on the board’s silkscreen corresponds to the positive rail, V- corresponds to the negative rail, and GND corresponds to ground. If you are leaving the bleeder resistors in place rather than moving them onto the board, they can be wrapped around the V- turrets and soldered in place.- Triple check your wiring. If you are replacing the bridge rectifiers with parts capable of handling higher continuous and peak currents, do so now. I recommend powering the unit up slowly with a dim bulb tester and variac while monitoring the supply voltages to confirm that everything is working as expected.- Enjoy! Parts Included – One capacitor mounting board (2.4 mm thick TG150 FR-4, 2 oz. copper, green solder mask, immersion gold finish)- Twenty capacitor spacers (5 per capacitor) designed for Kemet ALS80-A-DF series caps- Twelve wiring turrets- Four #6-32 x 3/8″ male to female threaded hex standoffs- Four #6-32 machine screws and nuts- Four 3″ lengths of 16 AWG wire (for connecting the grounds of each capacitor bank)- Step-by-step installation guide Special thanks to the eBay users who provided feedback on the previous revision of this kit.
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