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Marantz Integrated volume pot wiring?

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Posted on June 13, 2020 at 11:30:19
evang
Audiophile

Posts: 5
Location: hella east bay
Joined: June 13, 2020



Fixing a Marantz 1150 integrated, got it missing the volume pot and power switch. I'm very new to amp repairs and find the marantz schematic a bit confusing. I've got three pairs of sheilded wires, one yellow one orange and one red. plus two single wires, orange and yellow. red pair comes from balance, orange pair from the board with the filters, yellow from the adjoining board beneath that. Orange and yellow single wires from jh20 and jh24. Anyone remember where they go, probably save me alot of head scratching and doing it wrong. Thanks in advance!





 

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RE: Marantz Integrated volume pot wiring?, posted on June 14, 2020 at 03:01:22
Uncle Mike
Audiophile

Posts: 3199
Location: Southeastern Pa.
Joined: June 20, 2003
I'm not familiar with that model but there is hope and maybe getting you to the right place is best.
The on/off button is an something you could work around until you decide if you really need it as you'll probably have to source one from a donor unit.
The volume pot you would need to find a suitable replacement physically for size but the resistance and taper.
You will find a service manual with schematic and parts list at HIFI Engine. You will need to register to download.
Ask your question again at the Vintage Aslylum to get responses. Not to send you away but you might want to ask at Audio Karma if you hadn't already found it. Those guys are more attune to the nuance and because Marantz, like many, shared parts across models they might know the volume pot you would need.
https://audiokarma.org/forums/index.php?forums/marantz-audio.134/
It sucks to get old. It really sucks to get old and bitter.

 

RE: Marantz Integrated volume pot wiring?, posted on June 14, 2020 at 13:04:20
airtime
Audiophile

Posts: 10667
Location: Arizona
Joined: February 4, 2003
IF the wires are hanging in space, you're going to have to trace them back to some point that matches the schematic. From there you can figure out what leg it goes to on the VC. Honestly, I don't remember them being color coded??

 

RE: Marantz Integrated volume pot wiring?, posted on June 14, 2020 at 15:28:41
evang
Audiophile

Posts: 5
Location: hella east bay
Joined: June 13, 2020



Thanks, for the help guys. Okay, I think i'm getting it maybe someone can look this over and tell me if they see any problemsI wasnt really sure which lugs to use for which. i whent with power supply to center lugs, ground to outside tone to other side, loudness to bottom taps.

Orange and yellow singles go to the loudness taps, Doesn't matter which? one pair of lugs front and back is for ground, the middle pair is for jh 22 and 21 from the yellow wire, the final pair is for je 01 and 02 from the orange wire, how does that sound? I don't know where the balance comes in but maybe it is attached to the same lug as jh21 and 22 so that it is always synced with the volume?

 

RE: Marantz Integrated volume pot wiring?, posted on June 14, 2020 at 15:30:12
evang
Audiophile

Posts: 5
Location: hella east bay
Joined: June 13, 2020



wiring diagram

 

RE: Marantz Integrated volume pot wiring?, posted on June 14, 2020 at 15:39:02
evang
Audiophile

Posts: 5
Location: hella east bay
Joined: June 13, 2020
Okay I think the diagram has the balance going to the loudness taps

 

RE: Marantz Integrated volume pot wiring?, posted on July 19, 2020 at 22:36:09
JURB
Audiophile

Posts: 1845
Location: North Ohio
Joined: May 29, 2016
No. It goes through the main tone and whatever, and the balance is likely hooked to the input, which are the taps on the clockwise side. The middle taps will go mainly to the loudness button. The bottom taps are of course ground.

I might have the power switch laying around. I could be talked into selling it cheap because many class AB amps I have in use usually just stay on all the time.

 

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