Question about Marantz Audio Players & Recorders
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Marantz PM-34 Problem
The part that you speak of is called the emitter stabilizer resistor. It is common to the output pair on one channel. You will find that the large "output" transistors mounted to the heat sink either side of this resistor will most probably be faulty.
Best not to run the amp at all whilst in this condition.
To be sure that you have an effective repair, you will need to change both these parts, and also the "driver" transistors that connect to the outputs. They too are in symmetrical positions close to the the output transistors. You should also check that the 3 legged resistor you mentioned is measuring its correct value, and check all other low value resistors in the output stage area to that channel.
If you are not familiar with repairing this sort of equipment, perhaps you can find a repair guy with some experience on audio equipment, then this work should be all he needs to do to repair the amp. I would also ask him to "blanket resolder" the output/bias stages and power regulator stages in the amp as problems with heat stressed cracked/failed soldering and dry joints often cause these amps to blow the output transistors.
BE SURE THAT THE CORRECT PARTS ONLY are used for the repairs. Different transistors could cause future problems with the amp. The parts can be obtained relatively easily from a marantz distributor(we can find one in a country near to you). OR if you can give me the markings to each of the parts you need, I can provide you with an international source to get them from.
The amp is decent HiFi, and worth repair. Happy to provide you any assitance I can, Good Luck
Posted on Nov 03, 2008
SOURCE: marantz pm 7200 integ.amplifier
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
Posted on Jan 05, 2009
hmmm. Let's start by swapping the wires you are using for your speakers. Double check the wire connections first, then take the left and place iton the right and vice versa.
Posted on May 05, 2009
SOURCE: Marantz PM-48 connecting to TV
look on the back of the TV and there should be L/R audio outputs (white & red), connect this to a spare input of your amp via a connecting lead eg. AUX or any other input except PHONO.
hope this helps.
Posted on Jul 02, 2010
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