All systems function correctly but there is no sound from the speakers. Radio tuner, CD player, phono deck, tape deck all work, but no sound output.

If your turn table has a magnetic cartridge it will not work,Becuase the ner recievers are not equip with a phono preamp, They are equip to only use a crystal or ceramic cartridge in the turn table.

I can't even find a reliable picture of the amp but it's not rocket science.

The Tuner output goes to, say, FM or Aux on the am, anything BUT Phono, which is ONLY for a turntable.

The EQ output goes to the first available Tape In; Input Comes from the same Tape Out. Select that tape function to engage it in line with any source and the downstream electronics (second tape, tone, volume, speakers).

The tape deck output goes to Tape In; Input comes from Tape Out. If there is not a second tape loop on the amp, nest the Tape Deck into the EQ's Tape loop. They always have at least one to replace the one they use. Select THAT tape function to engage it in line with any source and the downstream electronics.

Don't run anything but a TURNTABLE through Phono. That's the only labeled input that's literal. Use any other Line Level input for the CD.

If you don't have anything connected to the Tape loop, use the Tape In connectors.

your phono outputs are a whole diff ball of wax than aux or tape etc, whole diff signal, all that they should run to is phono in on the receiver. You are using the cd recorder as a tape deck more or less, so use tape out to line in on the tdk, and tape in from tdk output. so..when spinning record, you have receiver set on phono, and the tdk should also be receiving that signal, to playback you would hit tape monitor button on the receiver and hear what the tdk has done, or is doing.

hi,, please check your RCA cable...or replace it possible...

Dear Sushant,    I do not think your use of an equalizer has caused any problems.  I will explain the proper use of the source/direct button.  This button's function is to monitor the output of a recorder connected to the record outputs of your amp.  When this button is pressed on the sound going to the speakers comes direct from the "source" (cd, radio tuner, phonograph etc.) when in the off position you can monitor the recording of whatever source is being recorded via the tape deck.  This switch must be off to record through the amps record outputs.    To test this, put a blank tape in the tape deck, choose the source as phono and place the dec in record/pause.  With the source direct button pressed on you should hear a change in volume when moving the amp's volume knob only.  When source direct is off you will be able to hear the output of the tape deck, so adjusting the tape deck's record level will also affect the volume coming out of the speakers.  more record level in/ more level out.!    Below is copied from page 9 of your user operation manual for Marantz's explanation of the source/direct button. 
best of wishes, Michael Mittelsdorf

Yes, it is a little tricky...

1) CD Changer (output) -> CD input on Amp

this is tricky... this will allow you to record to your tape deck, and control the sound via the EQ:
2) Tape Deck (tape out / recout) -> TAPE PLAYBACK on EQ
3) Tape RecOut on EQ -> Tape 1 Playback on Amp
4) Amp Tape 1 RecOut -> Tape Deck Playback / Input / RecIn
in essence, your creating a loop starting from the tape deck, going to the eq, then to the amp, then back to the tape deck to record.

Your EQ has another set of LINE IN and LINE OUT - use the second Tape 2 on the amp to create another loop. This will
allow you to control the EQ for any of the other sources.
5) LINE IN on EQ -> Tape 2 RecOut
6) Tape 2 Playback on Amp -> LINE OUT on EQ

5) Radio Tuner (output) -> Tuner input on Amp
6) DVD/VCR Combo Output -> AV/AUX on Amp

7) PC Computer... you don't have room for this. You can either use the PHONO input, and you'll have to purchase a Line Level Phono Converter
or, get a Y cable and split the signal and share with some other source.

Hope this helps.

- OPTiC
www.djproaudio.com
www.repairny.com

As far as I know, you need to press Record button to record from external source. If you press Dub, it will start Dubbing from Tape-A to Tape-B. You might be need to press Record and later press Pause or Play to start recording.

As the majority is working ok and the audio section is likely to be shared with the tape, cd and tuner, the problem is most likely to be the switching to the record deck, the phono cartridge or the wiring or connections between the cartridge and amplifier.

I suggest you dust off your trusty multimeter and begin at the cartridge and work towards the amplifier.

Considering the price range of the system it is unlikely the tone arm will be fitted with a magnetic cartridge and most likely a piezo or ceramic cartridge will be fitted. If the arm is dropped onto the stylus of this type of cartridge the piezo crystal can easily be broken, often resulting in a much reduced output or no output at all. A typical output would be 500 mV to 1 volt...

OK, this is pretty easy to do. First connect your leads from the component outputs(i.e., tape, cd, phono, etc) to the recievers corresponding input for the device. Then connect the recievers outputs to your equalizer, if it is a seperate eq. Then the outputs of that to your amplifier, then your speakers to that. Be sure all of your wires are connected with the proper polarity. These instructions may be a little different for your exact setup but basically follow the same order minus any device you dont have.