Marantz SR7500 teardown

Рет қаралды 18,454

3 жыл бұрын

My Patreon:
/ bored_tech
Marantz SR7500 FEATURES
MULTICHANNEL SURROUND
THX Surround EX
DTS 5.1 / -ES / 96/24
Dolby Digital / Dolby Digital-EX
DPL / DPL II / DPL IIx
Circle Surround II
Virtual Surround
Multi-Channel Stereo
Re-EQ
Headphone Surround: Dolby Headphones
Auto Surround Mode Detection
SOUND ENHANCEMENTS
Current Feedback Topology
Real full channel power drive (70%)
Discrete Amplification (All)
Pure Direct
Power Transformer: EI
Linear Drive Power Supply (LDPS)
D/A Conversion: 192kHz/24-bit
Digital Signal Processing: 32-bit
Bi-amp drive (5.1 channel setting)
Video Off
High Grade Audio Components
Chassis: Metal
OTHERS
MRAC (Marantz Room Acoustic Corrections)
On Screen Display: main/multiroom
Variable cross over
Front panel cursor control
Video conversion (CVBS-S-Comp)
Line memory (video conversion)
Analogue down mix
Multiroom: multi source
Multiroom zones: 1
Speaker A/B
Lip sync control
Random Tuner pre-sets: 50
RDS: PTY/PS
Auto TV Switching (On/Off)
Discrete RC coding
Software Upgradable (RS-232)
Bi-directional control via RS232C
INPUTS/OUTPUTS
VIDEO
Composite In/Out (incl. monitor out) 5/3
S-Video In/Out (incl. monitor out) 5/3
Component In/Out 4/1
Multi-Room Video Out: CVBS
AUDIO
Analogue In/out 8/4
Digital Optical In/Out 4/1
Digital Coaxial In/Out 3/1
Multi-Room Audio Out
Pre-Amplifier Out (channels) 7.1
Multichannel in channels 7.1
Multi-Channel In
Headphones Out
OTHER
Speaker Terminal: regular screw (all)
Multi-Room Speaker Terminal
Multi-Room D.Bus In/Out
D.Bus In/Out
IR Flasher In: 2
RS232C
DC Triggers 2
AC Outlets (Not for UK Model)
Front Inputs: Audio / Composite / S-Video / Digital (opt)
SPECIFICATIONS
AUDIO SECTION
Power Output (8/4 Ohm RMS) 105/- Watts
D/A Converter: CS4382
Digital Signal Processor: CS494003
Signal to Noise Ratio: 103dB
Frequency Response (Analogue In): 5Hz to 100kHz (+/- 3dB)
Frequency Response (Dig In): 5Hz to 45kHz (+/- 3dB)
Total Harmonic Distortion (THD) 0.05%
Stereo separation 70 dB (kHz)
Input Sensitivity / Impedance 168 mV / 47 kOhms
TUNER SECTION FM
Frequency Range 87.5 - 108.00 MHz
Signal to Noise Ratio (mono/ stereo) 75/70 dB
Distortion (Mono/stereo) 0.2 / 0.3 %
Channel Selectivity +/- 300 kHz / 60 dB
Usable Sensitivity IHF 1.8 uV / 16.4 dBf
Channel Separation 1kHz 45dB
TUNER SECTION AM
Frequency Range 531 - 1602kHz
Signal to Noise Ratio 50dB
Distortion 400Hz, 30%mod 0.5%
Channel Selectivity +/-20kHz 70dB
Usable Sensitivity Loop 400uV
VIDEO SECTION
Input level/impedance 1 Vp-p / 75 ohm
Output level/impedance 1 Vp-p / 75 ohm
Video frequency response 5-30MHz
Component video frequency response 5-80MHz
Signal to Noise Ratio 60
GENERAL
Available colours: Silver/Black
Metal Front Panel
Remote Control: RC1400
System Remote Control: Pre-programmed / Learnable
Detachable Power Cable
Maximum Dimensions (Wx D x H): 440 x 463 x 186.mm
Weight: 14.8 Kg

Пікірлер: 60

@jaume3433 Жыл бұрын

Thank you so much!!!. I was about to throw my sr7500 away when I fortunately came across your comment about the standby PCB. I heated that PCB with a hair dryer, and it woke up! :) (It was entering standby mode on power on, and also showing a "check pow5" error from time to time.)

@boredtech Жыл бұрын

Glad I could help!

@stepangerasimov 3 жыл бұрын

Thank you very much. I am fixing it this month and your video is quite useful for me.

@boredtech 3 жыл бұрын

Great to hear!

@vravikumar9 2 жыл бұрын

Excellent demo Thanos 😉😉

@boredtech 2 жыл бұрын

Thank you very much for watching!

@hermandevreesr762 2 жыл бұрын

Zeer interessante videos en leerrijke Technische uitleg😊😊

@boredtech 2 жыл бұрын

I don't understand what is written here, but I hope it's something positive.

@guangfalu1684 2 жыл бұрын

This is a fantastic video. Thank you so much! My SR8001 receiver has been collecting dust for many years due to the POW5 error (won't start up). I did lots of research and wanted to fix it, but I was afraid of dissembling the receiver. Now I learned how to do that after watching your video. I will give it a try.

@roidroid 2 жыл бұрын

I have same issue 🙁 (POW5). So far I have tried resoldering most solder joints on the the amp board, and (as *this* video suggests) resoldering the standby power board. Still have POW5 error though. There's so many capacitors inside, I thought surely I'd find some bulged caps but so far all the caps seem fine 🤷. If I find a fix I'll post it here. Please post your results here too, ok?

@guangfalu1684 2 жыл бұрын

@@roidroid sure, I will share my findings. In fact, several months ago, I replaced two 5v regulators (KIA 378 RO5P), and it immediately worked for two months. Then the POW5 error came back again. I guess the regulators problem is just a result, but not the root cause. I will dissemble the whole receiver and dig further. Will post my findings here.

@Tegelane5 2 жыл бұрын

@@guangfalu1684 Maybe those regulators need just small radiators? If there was some big error then those regulators would fail in two hours, not two months powered all the time.

@guydivosta4075 Жыл бұрын

@@guangfalu1684 any update by chance?

@arifhussain423 2 жыл бұрын

Excellent video and explanation !

@boredtech Жыл бұрын

Thanks, really appreciate it!

@akhilchandrikandd 5 ай бұрын

Very helpful video, thank you🫲🏻

@boredtech 5 ай бұрын

Glad it was helpful!

@ajitdoss Жыл бұрын

i want lot of video such like this thankyou so much

@boredtech Жыл бұрын

More on the way!

@argentumenimrex3578 3 жыл бұрын

Thanks for the video Enjoy your work. How about a current review of the Marantz SR7200

@boredtech 3 жыл бұрын

Sorry, but not at this moment, next in line is AV8805A then other few videos which are in pre-production stage.

@tomoko4270 2 жыл бұрын

Just got an SR7500 from the thrift, and followed this video to fix the unresponsive front knobs. Much appreciated! Just curious, what did you do about the dim screen? Seems like mine is dimmer in certain areas, but don't know where to start.

@TECHNDJ 3 жыл бұрын

16:57 thats why i use dimmer function right out of the box of my every pioneer receivers. Becoz my earlier yamaha receiver's vfd gone dim after 5 years of usage.

@TECHNDJ 3 жыл бұрын

@Jeremy Kenneth 🙄 irrelevant

@m4nc1n1 3 жыл бұрын

I wish you would have shown it before and after it was cleaned with the shroud off. Still a great video

@boredtech 3 жыл бұрын

Next time!

@deekay2 2 жыл бұрын

Does this model allow you to adjust the bass and treble tone without using the remote control??

@pbsa1979 2 жыл бұрын

Bit surprised there is no active cooling, that would explain why a lot of components are a bit fried... Great stuff.

@boredtech 2 жыл бұрын

Usually Marantz is not using active cooling in their Receivers. Oh, and thanks for watching!

@pbsa1979 2 жыл бұрын

@@boredtech Considering state of the internal components they probably should. I thought that most mid/ high end receivers would have active cooling, mine certainly do. Thanks for making this video's, fascinating how this stuff is put together.

@roidroid 2 жыл бұрын

If they had active cooling, they could put a filter on the fan inlet and eliminate the dust problem. Oh well.

@tech78o32 3 жыл бұрын

Very interesting... Are you going to reassemble it?

@boredtech 3 жыл бұрын

It’s already reassembled. And it’s even no spare parts left 🤣🤣🤣

@adilozcan2067 2 жыл бұрын

Do you think this amplifier will still work with only analog in and speaker out boards and everything else is removed? I already have one 7500 but want to use two 7500's to make a 7 zone multiroom amplifier in 1 casing. I want to remove all other components as all I need is analog in and speaker out.

@boredtech 2 жыл бұрын

I had similar thoughts. But it won’t work without main cpu which controls boot up sequence. I believe that you can find off the shelve controller PCB and program it. But do you really want to invest so much effort?

@stepangerasimov 3 жыл бұрын

Hello. What do you think I should change caps in amp? Are they bad? I have changed caps in power psb, the were bulged.

@boredtech 3 жыл бұрын

It's hard to advise something without knowing all the details. But if you think that yours capacitors doesn't looking right, you should find someone who can take a professional look at your amplifier.

@stepangerasimov 3 жыл бұрын

Thank you. Do you know the brand of blue caps?

@philvale5724 Жыл бұрын

Hi, just been looking for some info on SR7500 and came across you territorial on this device, I’d like to try and use it as a power-amp as my power amp stopped working, I at the moment I cannot afford to have it fitted, I have a NAD 314 preamp. Which I would like to plug it in to the back of the SR 7500 , After all that my question is where would you recommend plugging into in what channel I want to use the NAD as obviously the premium so I can change between CD tape record phono et cetera, And I’ve just opened the lid up like you have done must be at least two or three mil thick of dust inside it I’m hoping the thing is okay if you can just advise me please about whether to plug in the preamp. Phil from the moulin. Sorry I forgot to mention I living in France and have problems communicating with people in the shops regarding repairs and stuff like that.

@boredtech Жыл бұрын

I used my Marantz SR7500 as an amplifier (selecting the 7.1 input mode). It worked fine, the only problem was the volume control, as I had to adjust the volume on my AV7705 and on SR7500, that was a bit annoying as my remote control was messing with the volume of both units at the same time. But if you will use NAD as the preamp it shouldn't be a problem.

@philvale5724 Жыл бұрын

@@boredtech Hi 👋, I have not tried the remote yet needs new Batteries, Since I have sent you a message I have wide the NAD into it and it seems to work fine apart from it does get quite hot so I’ve got a small cooling fan sitting on the top suck in the air out now seems to run a lot better. I did however open it up and I was surprised about the amount of dust that was inside it it must’ve been nearly 3 to 4 mil thick so I got my trusty air compressor and blew all the muck out of it I can’t believe how much was in there, I think it was a good job I did it otherwise I believe that could’ve caught on fire, I have been looking at Roksan K3 and NAD C298, Hopefully Santa will drop one of these down the chimney at Christmas to time for me, thank you for your reply and hope. Phil from the moulin France.

@TheThang999 Жыл бұрын

I have this same unit, Unfortunately, it is in protected mode whenever the volume is tuned high with or without speakers. Is there a way to bysspa that protection relay? Many thanks,

@boredtech Жыл бұрын

What is the impedance of your speakers? Is it below 6 ohms?

@grocerylist 2 жыл бұрын

Sad this doesn't have the full copper chassis like some of the earlier 2000 era AVRs.

@roidroid 2 жыл бұрын

They made the chassis out of COPPER? That's nuts, sounds needlessly expensive.

@AngelMartinez-ot6oz 8 ай бұрын

because my marantz sr - 7500 doesn't turn on it doesn't do anything I'm waiting for a response

@MrLaskez99 2 жыл бұрын

Hello! Can you tell me what rating bears the fuse on STANDBY board (F801), mine has blown and I'm not sure what rating it was, as I'm suspecting someone put the wrong rating fuse. Thanks!

@MrLaskez99 2 жыл бұрын

fuse at 22:11 on standby board

@roidroid 2 жыл бұрын

@@MrLaskez99 it says on the PCB in the video, you can read it. When I take my fuse out to look at it, it says T5A L 250V

@CrashCarson14 3 жыл бұрын

What are the 2 amps per channel do?

@boredtech 3 жыл бұрын

I'm not sure If I can understand your question.

@roidroid 2 жыл бұрын

It might be to enable the output to be bipolar: both positive and negative voltage. (Instead of just positive & GND)

@amjadali-tv3si 3 жыл бұрын

I have yamaha rx v583. An "internal error" message is appearing. What went wrong ?

@boredtech 3 жыл бұрын

Hi, thanks for your comment, unfortunately I never came across with any of Yamaha products. Try to find official technical support telephone or email on Yamaha website.

@amjadali-tv3si 3 жыл бұрын

@@boredtech yes contacted and they replied it DSP board required replacement and demand a heft amount so got new Aventage series AV receiver. Thanks 😊

@Yiannis2112 3 жыл бұрын

@@amjadali-tv3si You should have given it to a decent technician around your area. Official service shops are full of nonsense 7 out of 10 times, they charge crazy money, it takes them weeks and you will never know what they fixed compared to what they said was wrong. Plus the postage back and forth. I'm amazed people seem to be so stuck with the official service solution.