Marantz SR5001 - Popping sound / vinyl efect

[Christiangb]

I recently bought a SR5001 on ebay but it does not work properly. It only works properly if I use an analog input and activate the pure direct option. If I do not use the pure direct option or I use a digital source I only get a pink noise (I will update audio).

I think it is something to do with the inputs board.

Did any had a similar situation with any other modern Marantz dolby receiver?

Thanks a lot!

[Andrew F. Ali]

Re: Marantz SR5001 - Popping sound / vinyl efect

Weak coupling/de-coupling e-caps...Test and replace e-caps...especially those small ones.

[budm]

Re: Marantz SR5001 - Popping sound / vinyl efect

Service manual:
https://www.manualslib.com/manual/11...-Sr5001-F.html

[Christiangb]

Re: Marantz SR5001 - Popping sound / vinyl efect

Thanks a lot for your answers. I opened the unit and apparently somebody already tried to repair it. There are some transistors replaced (attached image of the input board). All the capacitors looks fine to me, no leaks or inflated.

I will check the transistor reference to get the gates and try to test it with a multimeter. Do I need those transistors to be out of the board? It would be less time consuming if I just replace them. Any other ideas?

I also reset the unit and run all the test in the service manual but no improvement. The unit provides the firmware version,dates and other information info but not about any component malfunction message. This makes me think that the digital is ok.

Thanks in advance

[re-atari]

Re: Marantz SR5001 - Popping sound / vinyl efect

I opened the unit and apparently somebody already tried to repair it. There are some transistors replaced (attached image of the input board). All the capacitors looks fine to me, no leaks or inflated.

These 2 aren't transistors, but LM1117 voltage regulators. The voltages they output are listed on the silkscreen alongside them (+2V5 and +3V3).
Judging from your photo the one on the left has already been replaced. Look at the solder blobs on its legs and tab, and the excess flux around both components. The one on the right looks like it has had its tab resoldered. Check with a multimeter if they output the correct voltage. If so, the problem is somewhere else.

The cap on their right (C196) looks a bit strange to me. The silkscreen shows a much larger footprint than the actual cap has. Judging from the soldering it isn't replaced, though.

It's a game of hope and see if you can get the receiver fixed. You don't know how skilled the previous 'repairman' actually was, and what he has already done (for good or for worse) to the unit. It probably was on Ebay for a good reason in the first place.

re-atari

[Longbow]

Re: Marantz SR5001 - Popping sound / vinyl efect

If I do not use the pure direct option or I use a digital source I only get a pink noise.

Digital functions will all flow through the DSP processing circuitry, where the problem likely resides.

I think it is something to do with the inputs board.

How did you arrive at that theory? If you are getting pink noise and popping when switched to a digital input, your DSP chip(s) are most likely failing. Some careful troubleshooting and a very good understanding of your owner's manual might help you to confirm or deny. All of these submarine control consoles have to be factory reset before anything else. Clicks and pops in all channels? Random? If you are starting a career in electronics, this might be a great project. Otherwise I would trade it for a working unit.

[keeney123]

Re: Marantz SR5001 - Popping sound / vinyl efect

The legs of those electrolytic caps look like they were not solder properly. I think the solder could should come all the way on the top of the board. If it is a multi- layer board that would be critical.

[madan1]

Re: Marantz SR5001 - Popping sound / vinyl efect

What's with the 20mhz crystal? Is it soldered on its pins or has shifted?

[Longbow]

Re: Marantz SR5001 - Popping sound / vinyl efect

Pink noise and popping sounds happen when the captain switches to digital modes. Seems logical to focus on that section and follow signals as far as you can go. Boards like this use plated through vias. They do not rely on the component leads to complete the path from top to bottom.

[keeney123]

Re: Marantz SR5001 - Popping sound / vinyl efect

Pink noise and popping sounds happen when the captain switches to digital modes. Seems logical to focus on that section and follow signals as far as you can go. Boards like this use plated through vias. They do not rely on the component leads to complete the path from top to bottom.

I guess the question of the solder not going all the way through is not the layers are connected to the plated through hole but was the joint hot enough when it was soldered? Which then would cause cold solder joints.

[Christiangb]

Re: Marantz SR5001 - Popping sound / vinyl efect

Thanks a lot for your help!!! The SR5001 unit finally went back to the seller due to the intervention of Paypal.

I already got a second hand SR5500 that works fine by the moment. Its doesn't have hdmi and no HDCD but I will be using it with my computer so no need to use video. I also checked the HDCD releases list and I don't like any of the titles. I already connect my computer with a S/P-DIF 24bit/96Khz digital signal so no big deal with the HDCD.

Again, thanks a lot you all with your ideas and comments. Keep going! this forum is a very strong knowledge exchange community!