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Re: B speaker doesnot get on.
Switch fiorst your A speakers to B. see if nothing is changed and the speakers connected to B still doesnt work.
The switch for the speakers could not be cleaned my friend. it is a microtac switch only sending a small signal to the relay circuit to activate the speaker relay. but still good chance of microswitch malfunction since set A is working, no problem with your amp.
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Re: B speaker doesnot get on.
Apply a good contact cleaner in this button and press it many times.confirm good connection between amplifier output and speaker b.connect speaker A insted of speaker B if it is working the problem will be in cabel and speaker B if not the problem in your amp output stage.
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Hi i dont know if you found your solution but you can solve this on your own. on the front there is two buttons you have to press and hold in standby mode. The "Level settings"button and the "speaker 1" button. when you do that you reset the firmware.
Can you please tell me exactly how you have the receiver wired. What I need is, for example, the left front speaker is wired to what? Do you have more than one speaker wired to to the same speaker terminal? For more information, or if you would like to inquire about having your Sony repaired, please visit my website at audioserviceclinic.com. By the way, I was a Sony Factory Authorized Service Center for over 30 years. Thank you.
This "protection" mechanism is causing your speakers to go silent. Check the back of your receiver for loose/disconnected or shorted wires. Your receiver may have a TEST button that will tell you whether there's a problem with your connections.
After having checked/reconnected all speaker wires, run the test by pressing the button. Sound will come from each of the speakers, usually clockwise and go round all speakers until you press the button again.
Should there be a problem, the display will tell you whether the polarity is wrong, there's no connection, etc. If the messages don't make sense to you, go to your user's manual for an explanation.
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
check your interconnection cables-check volume control not in low level-no mute button or switch is pressed-check your input selector for right selection.-if you have speaker button confirm it is pressed.
please check first your input source and confirm it is ok.-check speaker button is pressed(if you have one)-speaker cables are connected firmly-from amp side and speaker side-check mute button(also if you have one)is not pressed.-make reset for your system(power off and on). if all above can not fix your problem you have to ask for help from service center.
please check all speakers cables for short circuit-disconnect all speaker-put volume low-wait and observe it if no shut down -go to next step-connect your speaker one by one until you find the bad one,start with speaker cable(try another good cable) and then speaker.if shut down happened again while you connect nothing to your system you will have inside problem and ask for service center to fix it.
Hi There DEKCAT
Its very unusual for both channels to blow......
I suspect that there is a blown power fuse inside the case......
There are fuses sometime located on the outside rear of the case and these can be easily checked to determine if they are blown..If you find one is blown please replace with the corrrect rated fuse,..... its current rating wil be on a small label on the case outside rear. like 1.0amp, or 1.5amp etc...
If you need to go inside the case please ensure the power plug is removed from the wall socket first.
You will find small glass fuses in the DC power supply feeds and probably one of these has blown, once again replace with the correct rated fuse.
Im not sure if your amplifier is a FET type or a large 32-40 pin IC type as if these are blown you will need a service person to do the replacement...
Please note there is a small relay that clicks 20seconds after turn on at the switch....if this click is not happening then there is problems with the timer circuit or the relay itself...
This relay controls the output to the speakers and as such stops all the sound output if its not working...so the first thing is to check all fuses, if they are OK then check the Relay operations....