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Marantz 3250B recapped but no sound from any source

FRANKPIETTE

FRANKPIETTE

Member
Hi all, I received a recapped Marantz 3250B, I tested it on the DBT, it powers on, but I have no sound on both channels. I linked pre-out main in, no sound at all, I tested, Aux., Tape 1, Tuner.

The screwed ground is in place the 2 connectors are plugged. I opened it and checked all solders on the main board and for missing parts. Everything seems ok as for the recap. Does this problem ring a bell to someone?

Tested my test cables and headphones

This one I don’t know where to start diagnostics. Any help would be very appreciated.
 
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What are you using for an amplifier?

You do know that this is a preamp, not an amp, right?
 
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He is probably confused as this series of "control amplifiers" also has speaker switching and speaker outputs on the back, but these are just switched passthroughs.
 
Yes i know it's a console only, i used headphones for the tests i did, yes i have the Service Manual for it. I checked all polarities on the caps that have been changed. I cleaned all pots, sliders, switches with Deoxit.
 
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Sure enough, i came back to the 3250B, i'm sure it was working so fast test, replugged eveything. 1-3250B Pre Out (1 or 2) to AUX on integrated amp. 2-Speakers cables from Int. amp connected to switching speakers set on 3250B 3-Speakers connected to 3250B syst.1 Spk, No shorts on DBT and no sound it powers on that's all. The way it's built i don't know where to start troubleshooting. Any help would be very appreciated. I can hear scratchy Integrated Amp volume pot through that's it...Help! Thanks
 
FRANKPIETTE said:
Sure enough, i came back to the 3250B, i'm sure it was working so fast test, replugged eveything. 1-3250B Pre Out (1 or 2) to AUX on integrated amp. 2-Speakers cables from Int. amp connected to switching speakers set on 3250B 3-Speakers connected to 3250B syst.1 Spk, No shorts on DBT and no sound it powers on that's all. The way it's built i don't know where to start troubleshooting. Any help would be very appreciated. I can hear scratchy Integrated Amp volume pot through that's it...Help! Thanks
Click to expand...
So you want two pre-amps in series?
 
Namlook said:
So you want two pre-amps in series?
Click to expand...
Nope, i don't have an amp. I have a Yamaha A720 to test it only. Should i plug the Pre-out of the 3250B to the Main in (Recceive) of the Yamaha Int. amp. ? Just tried, same results. I hear my scratchy Yamaha volume only tried Aux. and Tuner inputs. Nothing...Thanks
 
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Are you certain those are actual Pre out/Main in jumpers? If they were you should get nothing from the Yamaha volume control. I just searched for photos and saw the "Accessory Send and Receive" connections. That would be a weird way to label Pre out/Main in jumpers! I don't have one nor do I have a manual but I would think that they are more likely a connection for a graphic equalizer or something. Likely tied to the "Tone Bypass" button in some way. Good luck
Cheers........................................Todd
 
Hello Todd, makes sense i shouldn't be hearing the Yamaha volume knob, so it's probably for an EQ only as you suggest.
 

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