Hi,
I have been using Yamaha RX-V667 without an issue for few years.Recently it started to enter protection mode after playing for 15-20 mins.Till that time it works perfectly.
Short History-
Few days back while watching movie, there was some distortion in center speaker for few minutes.It became ok but next day humming sound appeared in center, That also went off and I could watch full movie without issue.There was never distortion there after.
But recently it started to go in protection mode after playback of 15 to 20 mins. Neither it was hot nor its speaker wire issue.I referred service manual and tried to cancel Protection circuit but it didn't. As per manual, excess current cannot cancel it but history is stored in IC chip.
So I disconnected main power and entered into P2 for history and found that
" P2-1
1st PS1 value 3 "
Manual says that normal values is between "37-141"
Now I need to know what can be this issue?
What does that low PS1 value indicates?
Service manual doesnt tell about that.
Kindly help me regarding it.
Thanks.
I have been using Yamaha RX-V667 without an issue for few years.Recently it started to enter protection mode after playing for 15-20 mins.Till that time it works perfectly.
Short History-
Few days back while watching movie, there was some distortion in center speaker for few minutes.It became ok but next day humming sound appeared in center, That also went off and I could watch full movie without issue.There was never distortion there after.
But recently it started to go in protection mode after playback of 15 to 20 mins. Neither it was hot nor its speaker wire issue.I referred service manual and tried to cancel Protection circuit but it didn't. As per manual, excess current cannot cancel it but history is stored in IC chip.
So I disconnected main power and entered into P2 for history and found that
" P2-1
1st PS1 value 3 "
Manual says that normal values is between "37-141"
An externally hosted image should be here but it was not working when we last tested it.
Now I need to know what can be this issue?
What does that low PS1 value indicates?
Service manual doesnt tell about that.
Kindly help me regarding it.
Thanks.
refer to service manual to disengage protection and check the secondary power supply rails regulators.+7ve reg I think faults in this unit KIA IC
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You can buy the service manual from Yamaha. They usually are very reasonable with their pricing. The service manual is a go/no-go item for your repair.
-Chris
-Chris
Just need guideline.
Whats the correct way to test AVR?
All circuits boards attached or can detach HDMI board?
The issue is HDMI board covers 2/3 area on top of amplifier section and hardly I can peep in.If I detach HDMI board, protection circuit will be cut off and may turning on AVR can damage it further?
Whats the correct way to test AVR?
All circuits boards attached or can detach HDMI board?
The issue is HDMI board covers 2/3 area on top of amplifier section and hardly I can peep in.If I detach HDMI board, protection circuit will be cut off and may turning on AVR can damage it further?
An externally hosted image should be here but it was not working when we last tested it.
Yes,I have already and self diagnosis gave me that error.But manual do not tell what it means.
Download sm-RXV667_HTR6063_RXA700[1].pdf from Sendspace.com - send big files the easy way
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welcome to my world!
you have to keep HDMI board connected to check unit..it has system control functions also...on second thought I would take to good Yamaha repairer..there is a way to check voltages in service position but can be dangerous for novice repairers
you have to keep HDMI board connected to check unit..it has system control functions also...on second thought I would take to good Yamaha repairer..there is a way to check voltages in service position but can be dangerous for novice repairers
Hi deadpool,
Very good advice, especially with this one. It is a bit much for someone starting out, and a PITA for experienced service people.
-Chris
Very good advice, especially with this one. It is a bit much for someone starting out, and a PITA for experienced service people.
-Chris
yeah Yamaha are great to work in some respects...all the answers needed are in their manuals...I'm glad I get to see plenty to repair so am used to working on them
If it was an old skool stereo yamaha amp I would give out more fault finding tips
If it was an old skool stereo yamaha amp I would give out more fault finding tips
Well l can just roll over HDMI board with ribben cable attached to it to check inside.Those flat cables are connected to psu and poweramp section.The have junction of an lC which is part of protection circuit.
Can l try that way?
Only analog connectiors on left side board will be detached.
Can l try that way?
Only analog connectiors on left side board will be detached.
First of all, is it still under warranty? If so, have them repair it. If not, i suggest you read up on how to fix it or talk with the peeps here.
Second of all, does this issue occur without the center speaker plugged in? If so, does it happen without any surround speakers (Just stereo FL and FR speaker only) connected? It might just be an issue with the speaker(s) itself. Try using different ones to see if anything changes when you swap out the speakers that cause the problem with anything else. (try speakers starting from lowest impedance that you can connect to the amp, to highest allowed to connect to amp)
Its not under warranty.
I played only 2 channels without center and surround,still it shuts off.Also connected only center and it happened again.
So l guess its not a single channel issue.Also when it plays 15mins, there is no distortion in any speaker.
I played only 2 channels without center and surround,still it shuts off.Also connected only center and it happened again.
So l guess its not a single channel issue.Also when it plays 15mins, there is no distortion in any speaker.
Hi spirovious,
If you had 1/2 a chance of repairing this - even with our help, I would be pushing you in that direction. I used to do Yamaha warranty, for 15 years until I sold my business in 1998. So I saw the beginnings of these type of receivers. What I learned was that the manual is required to service one. I also learned that these are fiddly to work on. I'm hoping that Yamaha is at least marking component designations on the component side of the PCB. They didn't use to, and that made the job that much more difficult because you had to waste time tracing components to the semiconductor they connected to for any chance at identifying it for sure.
You have the manual, but test equipment and experience might be the issue here.
-Chris
If you had 1/2 a chance of repairing this - even with our help, I would be pushing you in that direction. I used to do Yamaha warranty, for 15 years until I sold my business in 1998. So I saw the beginnings of these type of receivers. What I learned was that the manual is required to service one. I also learned that these are fiddly to work on. I'm hoping that Yamaha is at least marking component designations on the component side of the PCB. They didn't use to, and that made the job that much more difficult because you had to waste time tracing components to the semiconductor they connected to for any chance at identifying it for sure.
You have the manual, but test equipment and experience might be the issue here.
-Chris
Completely agree and will check any good technician near me. As you said,without any good equipment,its will be hard for even good technician too.I am afraid that any general service man will create new issue in AVR.
Meanwhile Yamaha Singapore service center has email me quotation.
Assessment charge $60
Technical charge $120
Digital pcb $620
Main pcb $340
Power pcb $280
Total: SGD1420.00
Its double the price I got AVR.🙂
Are you sure it's not overheating? Try attaching a fan to it's top vent right above or near the heatsink (or bottom vent if there is one and if you can point the fan underneath directly at the heatsink) with double sided tape (you're only doing it temporarily) and see if that fixes it.
Hi,
I was looking at you error PS1 and looking in the schematic for PS1 signal found that there is a signal PS1_PRT in page 19 and from the page 19 goes to page 12. This signal goes to a bridge that provide the regulated 3.3 volts . It is possible it does not have to nothing to do with the PS1 display error but when it fail you can check the voltage 3.3 volts and the voltage at the bridge. This is in page 19. In page 12 it goes to a Pull/down resistor and a analog chip.
I was looking at you error PS1 and looking in the schematic for PS1 signal found that there is a signal PS1_PRT in page 19 and from the page 19 goes to page 12. This signal goes to a bridge that provide the regulated 3.3 volts . It is possible it does not have to nothing to do with the PS1 display error but when it fail you can check the voltage 3.3 volts and the voltage at the bridge. This is in page 19. In page 12 it goes to a Pull/down resistor and a analog chip.
lol gee they quote everything, thats ridiculous...as I said in my 1st post its most likely the +7 reg..PS1 monitors this rail also...
Its not overheating issue as l always checked everytime it shuts down.lts hardly warm.
This AVR is compact and psu section is under large analog AV board.lt runs till speaker out and all check points are underneath.I need to read manual properly before l remove it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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Sounds like the Yamaha service people no longer troubleshoot, only change boards until it works. That isn't what I would call "service". Any idiot could do this. It looks more like a quote for insurance, they quote high so insurance would replace the receiver with a new unit.
spirovious, what equipment do you have?
-Chris
spirovious, what equipment do you have?
-Chris
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