I have a Marantz PM-17SA. This model should be close to the PM-15S1. The sound from left channel is small and distorted after using for 7 years. Sometimes after run it for few hours, the sound becomes normal. I try to repair it by myself, but I don't have this kind of experience before. I get the service manual, and check the schematic of PM-17SA. I apply a 1KHz sine wave input with I-POD and measure the preamp output and main out with an oscilloscope. I do not hook up the speakers. The preamp output of both channels looks good. But at the main out, the waveforms between left and right has little difference. The left channel looks distorted at the rising crossover point, and some high frequency noise appears at maximum amplitude. Can anyone give me some suggestions for next step? Is this problem possible coming from the electrolytic capacitors on the power amp PCB? Replace these electrolytic capacitors might solve the problem? Thank you.
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Re: Sound from left channel is small and distorted.
The distortion might be caused by a resistor. The loss of volume could be the capacitors, but you could try injecting signals into the transistors to see if any has gone. They can cause the distortion and loss of signal. If you apply a soldering iron to any part it will heat up quicker, or you could also use a hairdryer for the whole thing. You can also get a freeze spray that cools things that have heat sensitive faults (available from electronic parts shops).
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Is the amp otherwise functional? If not- check to make sure the speakers are hooked up and not shorted.
If it is functional and on AM or FM mode, it may just be the station signal is not adequately centered so part of the carrier is not being detected by the PLL and the between station muting is kicking in.
Hi, i don't really understand why you want to connect an amplifier to an amplifer. Might be that you want to get a louder volume or ?don't know.
I don't think there is any need for you too connect marantz ki17 amp to a power am. Both do the same work, but might have different watts. So you will need to check what you want to connect with the amplifier first and check the watts that can carry it without interference from the amplifier.
Goo day sir, the T on the fuse has nothing to do on you marantz fuse blowing up, chances are you amplifier is shorted, check you IC amplifier/power transistor for shorts. Check also your speaker impedance. usually they are 8 ohms. You can use a technician's multitester device to check the impeadance. An imbalance or mismatch speaker can cause a fuse to blow and destroy your amplifier. hope this helps.
There really is no point in connecting the two components with an optical (=digital) cable, if you didn't want to use the SA-15s DAC- and analog output section you might aswell have bo bought the chiepest one you could find...
To get better sound than the SA-15s analog outputs can provide, you would have to spend a load of money (not as much as for the SA-15 but quite a bit) on a DAC - and the DAC would only work with CDs, you would still have to use the SA-15s analog outputs to listen to SACDs.
So in conclusion: -Use the SA-15s analog outputs
-If you have other digital sources that you want to use - if you care about their sound quality - you can sell/return the SA-15s, buy the chiepest CD-Player you find (only look and feel matter) and spend the rest on a good DAC. (note: SACDs won't play on this setup)
I'm using a PM-15S1 with a DAC (Apogee Mini DAC, Studio-Equipment, nominal price ~1000$, got mine 2nd hand for 400€ ) myself. A DAC is usually the better choice over an expensive CD-Player - especially if you've got other digital sources (PC, ...) - but you'll probably lose a lot of money if you sell the SA-15, so think about it (IF you're still thinking about it, I realise that your question is 8 months old...)
anyway... have fun with the PM-15, it sure is beauty
the input selector switches if they are dirty can make the amplifier sound like it has a blown channel.
compare voltages from the left and right channel and make sure they are identical as well as the power supply,typically + and - 65vdc .check the regulators for the pream,they run panel lights off the same circuit + - 14vdc
Marantz SR 5200/6200 lost audio or crackling on left or right channel except in mode s-direct is now fixed ! The root cause is a defective inegrated circuit on DSP board (the one with digital inputs). To fix it change the chip CS4391 by a new one or better by the improved version CS4392. On my device a capacitor was cut close to this IC : replace one 1uF after changing the IC. For any question search me with my callsing "F5RCT"; i have a spare IC for the one who is able to change it ! I'm amateur radio and engineer