I did something to my Marantz 2270 that I'd like to share. At the very beginning of this project, I modified my Power Amplifier Boards (P750) and 2270 chassis by adding connectors to the boards and chassis so that I can easily connect or disconnect the Power Amplifier Boards from my 2270 receiver chassis. There are major benefits to adding these connectors: 1) From a completely assembled 2270, with the connectors, I can disassemble and remove both Power Amplifier Boards in less than 5 minutes! 2) With the connectors, I can easily connect a board, power it up and test it without having to reinstall it! 3) Adding the connectors makes servicing the 2270 relatively pain free.
Here are some pictures of the connectors that I used. Note the boards still have their original Marantz parts on them:
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If you are interested in adding the connectors I used, below is a picture of the connector packaging that includes the brand and sku#:
View attachment 1005312
You'll need 16 gauge wire in 6 colors: Red, White, Blue, Green, Yellow and Black. AutoZone has the perfect 16 gauge wire for this application. Their 16 gauge wire is not stiff like so many others. The AutoZone links for 30 foot rolls are:
Red -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/163444_0_0
White -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/768395_0_0
Blue -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/163410_0_0
Green -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/150807_0_0
Yellow -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/163428_0_0
Black -
http://www.autozone.com/miscellaneo...-wire/electrical-wire-primary-wire/163451_0_0
Marantz built my 2270 with 18 gauge wire. I don't know if this was standard practice, but I like using the thicker 16 gauge. The 16 gauge wire just simply has better conducting capability than the 18 gauge and it worked extremely well for me.
Regarding the connectors, the connector contacts have crimp tabs. I used the crimp tabs and then soldered the wire, which resulted in really solid wire connections to the contacts.
If someone else has worked on your 2270, expect that you'll need to rewire a part of the chassis' power lines because you'll find that the previous person had burned too much insulation exposing wires and/or created very tight wire connections by cutting wires too short and re-soldered them to their terminals anyway.
If done properly, it will take you about 2 hours to make the necessary modifications to add the connectors.
If you are not very experienced in electronics and soldering or don't know what you are doing...do not attempt to do this or anything else in this thread. Hire a professional!
Good luck all...please feel free to comment.
Phil