Re: Anthem MRX500 - no sound. R2A15218FP issue??
So a little bit of an update. I received my JTAG interface today and got everything wired up. While I was connecting to it, I kept getting an error. So I started probing around and noticed that my 3.3V source voltage was dipping down to 0.9V or so.
At first I thought maybe the chinese JTAG clone was not putting out enough power. So I wired up an external 3.3V, and same thing happened, the voltage dipped down to 1.2V or so. So it appears that something is "shorted" or drawing down power that the DSP chip is...
benspawn02
Member
Last Activity: 09-01-2023, 04:01 AM
Joined: 08-11-2023
Location: Prahran
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Ah right ok. No progress on my end so far. I ordered a JTAG interface and will see if I can get anything.Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
How did you manage to retrieve the dump from your marantz dsp flash and subsequently reprogram it?...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
This sounds great but it's a bit beyond my scope. If you don't mind me asking a few questions to guide to see if I can even attempt this. . .
Did you have a particular rig that you had to build? Remove the DSP chip from the board? Anywhere you can point me in reading a how-to?
EDITED:
So after I posted the above, I did a quick Google.
Based on this. . . [url]https://www.riverloopsecurity.com/blog/2021/05/hw-101-jtag/[/url]
I found some info about JTAG and it appears that this TMS...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Just an update.
I tried reflashing the Anthem MRX500 firmware today. However, I cannot seem to make any progress. I am running the recommended USB-Serial adapter (Tripplite Keyspan USA-19HS).
The process is supposed to take around 10 minutes according to the read-me.
Unfortunately the firmware reflash is not verbose and there is very little feedback. However, it states DSP-1 Writing. . . 0KByte and I let it run for a good 30 minutes but still no progress. One of the posts on the owner's...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
I checked the mute by probing pin 51 on the R2A15218FP chip, I believe I read documentation somewhere that logic low means no mute applied. When I probed it, it read 0V. Also when I press the MUTE on the front panel, it still reads 0V and nothing changes. However, when I turn off the AVR from the front panel switch, the AVR goes into standy mode and as soon as the relay clicks, I read 3.3V on the pin.
I am not sure if the MUTE control utilizes this pin or it is achieved via some other method.
...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Yeah that's it then, yeah I set up the correct sources for the modes that I was selecting on the AVR. It isn't an issue of not routing the correct input into the AVR at this stage. But good to be checking the common errors.
There are various listening modes, DTS, Dolby etc. I've gone through all of them. I believe depending on the listening mode, the sound either gets further digitally processed or not. I'm assuming there's a direct mode. . . although I am not entirely sure without technical info from...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Hey mmartell, I am not sure about whether these are factory programmed or gets written during boot. . . There are 2 chips directly beside the DSP chips. They are MX 29LV320DTTI. Would the storage chips be used strictly for the DSP? Shouldn't other errors show up if the DSP chips essentially are reading blanks or corrupt data? Also are these DSP chips just strictly for sound processing?...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Yeah the measurement side of things are fine so far. The only part where I can't really rely on proper measurement is the DATA pin if it's a high frequency PWM or a pulse signal for example.
Yeah, I agree with you there. The block diagram that I found for the chip (assuming it is correct) seem to show that the REC path is always present. However, it is peculiar that the REC signal is no longer present on Tuner input vs Analog Input. I am not sure if the front-end of the chip is working properly or if...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Hey budwich, no worries. Yes, I've tried a few different analog sources as my input to test. I did not try the digital coaxial or optical in as I did not have an optical output source to feed into the AVR.
Yes, previously when this thing was working, when the tuner is not locked in to a station, there would be the radio static sound. Also, I am able to tune to various FM channels so it's evident that the tuner is working. I also traced from the R2A chip back to the tuner board and probed at the input...Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
This is the Multi-Media board that sits below the HDMI board. It connects to the HDMI board via the black Dupont header.
This board houses the Ethernet input, USB, as well as a proprietary Anthem Dock....Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
HDMI board (4 inputs, 1 output) along with the daughterboard that is next to it for the composite video in, component video in, as well as monitor out....Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Additionally not to clutter up the reply above.
Here are more photos of the MCU/DSP board with photos of the underside of the board as well as close up of relevant areas.
I managed to trace the DATA pin (pin 51) on the underside of the board which eventually terminates somewhere near the ARM STM32F MCU....Leave a comment:
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Re: Anthem MRX500 - no sound. R2A15218FP issue??
Thank you for your reply budwich.
The front panel doesn't provide much of any information with an analog input. It appears to be a passive setup without any monitoring/feedback if any input is registered.
I've attached photo of the front panel with input on Analog 4. I set the video to be on HDMI 1 although there is no feed in. I have also tried disabling video input but still there is no difference in terms of sound output to the speakers.
I also attached a photo in FM tuner mode....Leave a comment:
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Anthem MRX500 - no sound. R2A15218FP issue??
Anthem MRX500 - no sound
Dear Electronics Experts:
I have the following problem I am trying to troubleshoot. Unfortunately, I have contacted Anthem themselves and even a local distributer but I am not having much luck. Also, I have scoured the internet and unable to obtain a service manual. The Anthem service rep has also replied that he is unable to provide me with any service documentation. I have performed numerous searches on the internet and cross-referenced a few other AV receiver makers (Denon, Marantz, Onkyo) and found certain similarities to block diagram... -
Re: New Members - please post your introductions here
Hello,
I came across this forum while doing searches for an audio controller. I was formerly a Mechanical Engineer by career but have long switched careers professionally. I still tinker and fix things to reduce landfill waste. Also, I hate to see perfectly good things that are salvageable go to waste.
BenLeave a comment:
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