Question about Marantz SR8500 Receiver

2 Answers

I have a Marantz SR-8500 receiver that just clicks.

I have a Marantz SR-8500 receiver. When powered on, it just clicks. I am a hobbyist, but I have repaired many receivers and amps over the last few years. However, I'm stumped on this one and would like some expert advice. Here are the readings and facts so far:
* It looks like the CPU is forcing the receiver into standby every second or so (_standby voltage to power board alternates between 5v and 0v. as measured on the ribon wire),
* the clicking relay is on the standby board, there is no display when relay is clicking EXCEPT when multi button is pushed, then clicking stops and I can see display, change sources for multiroom, etc.
* in no case can I get the receiver to go into service mode (normal or multi room mode)
* _PA_Fail, _PL_Fail and _Heat_Det all measure 4.9v as measured from the ribbon wire on the power board.

Any help would be greatly appreciated.

Posted by on

  • sjdaud Apr 26, 2010

    Hi,

    Thanks for the comments. I do have a service manual for this reciever and if you would like me to forward you a copy I'd be more than happy to. I did try to get into service mode several times using the method in the manual, and also tried doing a system reset with no success. I included the voltages because based on my reading of the schematics (which I could be misreading), they seem to be indicating that there there is no fault. It looks to me like if there was a fault with the amp (PA_Fail), the power (PL_Fail) or heat (Heat_det) that a transitor would dump the voltage to ground which would signal the CPU to go into protect mode. Are there other signals that cause the CPU to go to protect? Also, this seems to be a fairly common problem with these receivers (this and and the SR7500 are for the most part the same), but I have not found anyone yet that has pinpointed where the problem could be. Could this be related the 'Check POW5' error that others have seen? I don't get that error, but is that because I don't have a display? I apologize for the many questions, but I've been looking that this for quite a while.

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,768 Answers

1. You will need the schematic to check the proper voltage that feed the regulator and sound chip, usually an 8 pin long pack on the the board.
You can do a Google search for the ESI. You may be able to download the full schematic there and or get the information for you unit service manual.

Posted on Apr 26, 2010

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Marantz Master
  • 19,396 Answers

Hi.

Re:"* It looks like the CPU is forcing the receiver into standby every second or so (_standby voltage to power board alternates between 5v and 0v. as measured on the ribon wire), * the clicking relay is on the standby board, there is no display when relay is clicking"

That is standard protect mode. When a problem, like a wrong voltage or a short is detected from CPU, the system is forced to standby. The clicking noise is the safety switch forced by CPU every tot seconds. there will be no operations apart standby when in protect mode. The CPU higher voltages get shut down to prevent further damage, only low +5V is kept on to show the diagnostic protect mode. The clicking is just a signal that there is a fault, and not the fault itself.

Re:"EXCEPT when multi button is pushed, then clicking stops and I can see display"

That is a better hint on what the fault could be. On multi room different speakers are used. start checking speakers connection, focus on the speakers that are eventually not used in multi room.

If speakers connections are OK, concentrate on terminal block (input output) circuits, chck the surround mode selector. Testing is mainly done at component level, ensuring that there are no shorts to chassis, cold solder joints (broken ternminal contacts), or faulty components in this areas.

Since the fault is not ocurring when in multi room mode, you can for example exclude circuits like power supply transformer and video board (if present), that are not affected from changing to multi room mode.

If there is no error in there the following troubleshooting will be on the complex audio section (from preamps to power amp final and terminal).

About not getting into service mode, that would be quite unusual. When a marantz is on protect, it still goes in service mode and displays PROTECT at start.
I do not have the manual for SR8500, but you can follow instructions on how to get in service mode from page 32 on the manual for SR4400, uploaded here.


Posted on Apr 26, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Marantz SR-7200 volume -29dB blinking


Check Speaker connections at BOTH ends and double check to see that they are on the right terminals.

If you need a manual . the Marantz site will have one . PLus they may have FAQ notes for that receiver

Cheers

Mar 01, 2014 | Marantz SR-7200 Receiver

Tip

Marantz SR-7200 reset


This was documented on the Marantz website briefly a year ago and is no longer available. My SR-7200 develops "click/pop" problems and a reset cures it of these issues.

While powered "off," on the front panel, press: A/D + FP +Dimmer (3 buttons) and power the unit on.

This reverts to original (out of box) settings. You then must reprogram input sources, speaker setup, levels and radio stations.

on Oct 03, 2011 | Marantz SR-7200 Receiver

1 Answer

Is it worth fixing a marantz sr5002?


if it's a blown amp channel, might cost around $150 to repair

Nov 21, 2013 | Marantz SR-7200 Receiver

2 Answers

Marantz SR-14 EX 5.1 Channels Receiver fuses.


Changing the type of fuses in your receiver will not change your sound quality at all.

Jun 07, 2012 | Audio Players & Recorders

1 Answer

Marantz sr5600 reciever click and goes to blinking standby


I have the same problem. Earlier it got sorted out itself and now it has started coming up again.

Feb 26, 2012 | Marantz SR-5600 Receiver

1 Answer

I have a Marantz SR-5600 surround Receiver. It has been shutting off the volume at various intervals recently. When I attempt to turn it back on a display reads " Check POW5


The POW5 fault indication means that the 5Volt power supply grid is not OK. The unit needs to be repaired by a professional repair engineer. No user servicable parts inside.

Jul 19, 2010 | Marantz SR-5600 Receiver

2 Answers

What is the error POW 5 on a marantz sr 7500


I have a POW 5 failure on a marantz sr 7500. Anybody know how to fix?

Jun 02, 2009 | Marantz SR-7400 Receiver

1 Answer

Replacement power cable


Dose not matter use one with 3 holes as you put it,it will work ok.

CABLE GUY.

Apr 18, 2009 | Marantz SR-4400 Receiver

Not finding what you are looking for?
Marantz SR8500 Receiver Logo

Related Topics:

457 people viewed this question

Ask a Question

Usually answered in minutes!

Top Marantz Audio Players & Recorders Experts

The Knight
The Knight

Level 3 Expert

75571 Answers

 Grubhead
Grubhead

Level 3 Expert

5484 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Marantz Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...