Pioneer VSX-521-k / 821-k / 921-k / 1021-k - Power-On problems? - Page 4 - AVS Forum | Home Theater Discussions And Reviews
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post #91 of 114 Old 02-07-2016, 08:53 AM
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VSX 822 no power

Which fuse is the correct fuse for the VSX 822?
In an earlier message you stated that it was white ceramic.
The fuse inside mine is clear glass a T6.3AL250V, but I bought it used on Amazon, so I wonder if there was a problem and the fuse was replaced incorrectly. My system worked fine mostly. I could not get digital optical to work. One day the power quit, and nothing. Fuses are cheap and easy, but I want to use the correct one.
The T6.3A250V is white ceramic. I am not savvy enough to know the difference it would make if any.
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post #92 of 114 Old 02-21-2016, 07:34 AM
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VSX-521

Has anyone had any luck doing a reset of the system?
I was told by Pioneer support to press "band" and "power" at the same time.
This brings up "reset?" in the display.
Then press the Auto Surround and ALC button at the same time, and then I get "Ok?"

Which seems to be some type of confirmation on if you want to reset the unit.
Pioneer will not answer back my emails, and I'm getting no help on what to do to confirm.
If I put the Auto Surround and the ALC button again, nothing.
Any other button, nothing. Has anyone done this reset, and what I need to confirm?

I'm having a whole bunch of issues with this unit. Sometimes I can not power the unit down, the exact opposite of what I've read here. Even after unplugging the unit and plugging it back in. I can't use the power button to power it down. There are issues with the audio from the TV not coming through. No hiss, or static or anything when the radio tuner is on, just dead.

I bought this unit a few years ago, had to put it in storage for a couple of years since I moved out of the country.
I might have had a few hours of usage out of it prior to putting it in storage.
Now that I'm back, and took it out, its looks like its not working. I'm totally considering never to buy a Pioneer again.
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post #93 of 114 Old 02-21-2016, 08:31 AM
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Quote:
Originally Posted by Codymonster View Post
VSX-521

Has anyone had any luck doing a reset of the system?
I was told by Pioneer support to press "band" and "power" at the same time.
This brings up "reset?" in the display.
Then press the Auto Surround and ALC button at the same time, and then I get "Ok?"

Which seems to be some type of confirmation on if you want to reset the unit.
Hi Codymonster, using the buttons on the receiver
1. Switch receiver into Standby

2. While holding down "Band", press and hold "Standby/On" for about two seconds

3 When you see RESET? appear in the display, press "Auto Surround/Stream Direct"

4. OK? show in the display

5. Press "ALC/Standard Surr" to confirm

6. OK appears in the display to indicate that receiver has been reset to factory settings
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post #94 of 114 Old 02-21-2016, 08:54 AM
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Quote:
Originally Posted by JChin View Post
Hi Codymonster, using the buttons on the receiver
1. Switch receiver into Standby

2. While holding down "Band", press and hold "Standby/On" for about two seconds

3 When you see RESET? appear in the display, press "Auto Surround/Stream Direct"

4. OK? show in the display

5. Press "ALC/Standard Surr" to confirm

6. OK appears in the display to indicate that receiver has been reset to factory settings
Thanks JChin....
Any clue why the unit can not power down? I press the power/standby button.. nothing. Usually you hear the "click" of the unit and it shuts down. But nothing..
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post #95 of 114 Old 03-24-2016, 09:20 PM
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startup problem with my Pioneer VSX-321 reciver

Dear Friends,

I am having a startup problen with my Pioneer home theatre VSX-321 receiver. Everytime I am switching on my receiver it is giving a click sound but there is no display comming. I have tried pressing the standby + the surround as well as sdandby + Band but nothing happned. It is simply not starting up. Please help.
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post #96 of 114 Old 04-14-2016, 03:34 PM
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I fixed the POWEROFF problem with my VSX-305. The main blue relay had a cold solder joint. It's the relay that clicks after powering on. After resoldering the joint it never shut off again.
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post #97 of 114 Old 05-30-2016, 08:32 AM
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Hi,

I have a VSX-522 and have been having the same shutting down right after powering it on ever since I bought it fairly much.
The force power on always worked, but sometimes it would require a few times before it stayed on.
It has never shut down once it powered up properly.
When I looked in the error log, it is all DC errors.
I tried the reset, and this seemed to work for a day maybe - or maybe it was because everything was already on? But it seemed ok.
Next day it started doing the same thing again.

After reading here that someone found it to be a dry solder join I thought it's worth a look, so I took it apart to have a look. I couldn't find any bad joins, but it occurred to me that it seemed to power up ok if it was the first thing powered on, and since I have everything running through hdmi it may be that board. So I disconnected it's daughter boards and flipped it over for a look. All looked fine here as well, so I just put it all back together, and plugged it all back in. Did the reset again, and went through the whole setup procedure and speaker test. I then made sure the tv and ps4 was not allowing any hdmi control etc as well.

It's working perfectly now. I mean I can turn it on and off whether anything else is on or not.

Just thought I would share in case it helps others. I think this hdmi board is quite sensitive, and either wasn't seated properly or reacts badly to hdmi link control.
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post #98 of 114 Old 05-30-2016, 05:32 PM
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Know what? Forget all that up there.
It did work. On, off as many times as I liked, with everything else on or off, yesterday.
Not today. No sir. Gone back to being an annoying pain in the butt. Just took 6 times trying the standby/adv surround before it stayed on.
About ready to throw this receiver in the bin.
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post #99 of 114 Old 06-03-2016, 11:21 AM
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Talking Worked Like a Charm!!

Quote:
Originally Posted by HagisPL View Post
For those who have problem with turning ON Pioneer VSX (like I do) i found another VERY useful key combination
POWER / STANDBY + ADV. SURROUND for 5 sec. - it will restart processor - it is working for me.
 
My VSX420 was shutting down after 3-5 sec after powering it on. Then I use that combination that I found in deep internet
 
I hope that it will help for some of You.
I called the shop where I bought this and a few other repair shops and no one could help me with my Pioneer VSX-43, it just popped one night when I turned it on and it was dead, except for a blue hdmi light. I was about to throw it away because the shop stated there would be a $100.00 bench fee, and then he did not know what it would cost after that. I tried the Power/Standby button + ADV Surround for 5 seconds and it reset. Works perfectly!!

Thank you
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post #100 of 114 Old 07-22-2016, 04:24 PM
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A few months ago my right channel started cutting in and out on my VSX-822-K, I replaced the right channel relay and all seemed ok.
A few days ago (after being out of town for a week) the right channel is not working again, but this time I cannot get it to work. There are no error codes. Could you point me in the direction to test things and find out if the transistors need to be replaced?
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post #101 of 114 Old 12-24-2016, 07:31 AM
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Similar problem here, VSX-1021-K. Randomly started shutting off with MCACC light. Problem grew more frequent until I had to release it 3 or 4 times to get it to start up. Diagnostic mode showed the DC detection counter maxed out.

I pulled the boards and tested all the final transistors for continuity between pins but didn't find anything unusual.

One thing I did notice is that there is continuity between pins 1 and 3 (in both directions) on the D25SC6M diode on the SMPS board. That seems bad to me, but I'm not sure if that would cause the DC detection or not. If anyone has any input I'd love to hear it. Anything else that may have failed to cause the diode to go bad or could the problem be limited to just this one component?




Thanks!
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post #102 of 114 Old 02-04-2017, 10:35 AM
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Power on / Power off problem.

This is going to sound out-of-place in such a hi-tech forum but here goes. I have an old Pioneer receiver which after many years of service developed the power on / power off problem. The solution turned out to be simple. An insect had left a white cocoon in an input.
I cleared it out using a pipe cleaner. While I was at it, I checked all other inputs and outputs for extraneous material. That was the problem. The power up / power down disappeared. I guess it was conductive enough to give the power on diagnostics concern. It took about 5 minutes and well , you never know....
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post #103 of 114 Old 02-19-2017, 09:20 AM
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Vsx-527

Hello Guys,

Same problem overhere, but managed to figure out some more ... Ours is shutting down, only when "cold".

With key-combination "Adv Surround" + "Power-On", it resets it's processor, and it keeps going, even when I shut the receiver down, and back up again some hours later, it goes on without any problem.

Over-night, we always have the same issue. Receiver shuts down again after 3 seconds.

Now,

I put the receiver outside where it is cold. No go, does not want to power on, even with the key-combination described above. Shuts down again !

Did de-assembly of the end-trap of the amp, and put that board in a 60 degrees forced-air oven.
Put that board back into the very cold amp, and ... It started right up !!!
Must be a component (I think an RTC) that is failing !!!!

Any ideas ?
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post #104 of 114 Old 02-24-2017, 01:03 PM
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Quote:
Originally Posted by RacingDuck View Post
Hello Guys,

Same problem overhere, but managed to figure out some more ... Ours is shutting down, only when "cold".

With key-combination "Adv Surround" + "Power-On", it resets it's processor, and it keeps going, even when I shut the receiver down, and back up again some hours later, it goes on without any problem.

Over-night, we always have the same issue. Receiver shuts down again after 3 seconds.

Now,

I put the receiver outside where it is cold. No go, does not want to power on, even with the key-combination described above. Shuts down again !

Did de-assembly of the end-trap of the amp, and put that board in a 60 degrees forced-air oven.
Put that board back into the very cold amp, and ... It started right up !!!
Must be a component (I think an RTC) that is failing !!!!

Any ideas ?

BINGO !!!!!

Found a transistor that was failing when cold. When triggering it with heat before startup, amp was working well. It is a C3206 Y K239 (see picture) in the C(enter)-section of the end-trap.
Bought a SC3206Y from ebay, soldered it instead of the failing-one, and amp is working great now !!!
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post #105 of 114 Old 02-24-2017, 01:07 PM
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Cost ?

6,5 euros
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post #106 of 114 Old 02-25-2017, 04:37 AM
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Quote:
Originally Posted by RacingDuck View Post
BINGO !!!!!

Found a transistor that was failing when cold. When triggering it with heat before startup, amp was working well. It is a C3206 Y K239 (see picture) in the C(enter)-section of the end-trap.
Bought a SC3206Y from ebay, soldered it instead of the failing-one, and amp is working great now !!!
Very interesting. How did you determine that transistor was failing when cold?

Joe Guinan
Fremont, Nebraska
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post #107 of 114 Old 02-25-2017, 06:32 AM
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Quote:
Originally Posted by Spitfirejoe View Post
Very interesting. How did you determine that transistor was failing when cold?
First take the amp somewhere were it is cold and let it coold down. Will not startup / shutdown after 3 seconds.
Reset the amp with Adv Surround / Power-on each time you test.

With a hair-dryer I first heated up some areas of the end-trap, step by step, to make search easier. Every time, I let it cool down again + reset.
I identified the amp did startup perfectly when the 'center'-area was heated a bit.

Next, again, let it cool down + reset each time, en heating the transistors, one by one with a solder-machine for max (!!!!) 5 seconds. This way I identified my broken transistor ...


Note : This might not be the solution to all of you guys, but maybe for 50% ? Let's hope it is you solution too ...
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post #108 of 114 Old 02-25-2017, 11:13 AM
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Quote:
Originally Posted by RacingDuck View Post
First take the amp somewhere were it is cold and let it coold down. Will not startup / shutdown after 3 seconds.
Reset the amp with Adv Surround / Power-on each time you test.

With a hair-dryer I first heated up some areas of the end-trap, step by step, to make search easier. Every time, I let it cool down again + reset.
I identified the amp did startup perfectly when the 'center'-area was heated a bit.

Next, again, let it cool down + reset each time, en heating the transistors, one by one with a solder-machine for max (!!!!) 5 seconds. This way I identified my broken transistor ...


Note : This might not be the solution to all of you guys, but maybe for 50% ? Let's hope it is you solution too ...
Offcourse, I noticed at first that the amp was having troubles to start-up, only when cold. With the reset-key-combination I managed to get it working again before this fix.
When it was "hot", shutting it down, and back up after a while was still working fine. It was only, as an example, overnight, that it had this failure.

Solved by changing this transistor.
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post #109 of 114 Old 03-03-2017, 11:30 PM
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Quote:
Originally Posted by RacingDuck View Post
Offcourse, I noticed at first that the amp was having troubles to start-up, only when cold. With the reset-key-combination I managed to get it working again before this fix.
When it was "hot", shutting it down, and back up after a while was still working fine. It was only, as an example, overnight, that it had this failure.

Solved by changing this transistor.
Hi I have the same unit with the same problem I will have this fix done ASAP hope it works.

Rob
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post #110 of 114 Old 03-04-2017, 09:37 AM
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Quote:
Originally Posted by robbruce View Post
Hi I have the same unit with the same problem I will have this fix done ASAP hope it works.

Rob
Never had this problem, receiver does turn on when turning tv on, strange error, receiver works fine still, VSX-821, I have BestBuy warranty that I have used once to fix faulty HDMI port.
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post #111 of 114 Old 03-05-2017, 04:20 AM
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Quote:
Originally Posted by robbruce View Post
Hi I have the same unit with the same problem I will have this fix done ASAP hope it works.

Rob
Be sure to find the right transistor. Mine was one of the center-speaker. Might be another "channel" !
Keep us informed !
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post #112 of 114 Old 06-13-2017, 02:23 PM
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Quote:
Originally Posted by thx1138a View Post
I'm posting to try to find the common denominator with these models power failure issue. The entire family in this line seems to have the same problem: the power button is pushed - the unit comes on - the unit powers itself off after about 5 seconds.<br><br>
I have read reports (here and elsewhere) of the same issue in the following models:<br><b>2011</b><br>
VSX-421-k (never seen one - maybe EU only model)<br>
VSX-521-k<br>
VSX-821-k<br>
VSX-921-k<br>
VSX-1021-k<br><br><b>2012</b><br>
VSX-522-k<br>
VSX-822-k<br>
VSX-922-k<br>
VSX-1022-k<br><br><b><span style="font-size:16px;"><span style="color:#0000FF;">**EDIT**</span> The final diagnosis would seem to be blown amp transistors. The part numbers appear on the 2nd page.</span></b><br>
__________________________________________________ ____________________<br><br><b>What I know so far...</b><br><br>
- It's not the main fuse. This is located at the top of the "STANDBY ASSEMBLY" in the left rear corner. It should be visible using a flashlight without removing the cover.<br><br>
- The Service Manual ( downloadable from electrotanya ) Lists a error log that can be run (if you're quick) and a reset procedure.<br>
* <span style="text-decoration:underline;">error detection count</span> - (from OFF/STANDBY state) press &amp; hold [PRESET &lt;–] &amp;[ STANDBY/ON] buttons. Release when the unit powers on. each press of [ENTER] key display a protection error count. DC errors / OVERload error / TEMPerature errors<br>
* <span style="text-decoration:underline;">error reset</span>- (from OFF/STANDBY state) press &amp; hold the [ALC/STANDARD SURR] &amp; [STANDBY/ON] buttons. Release when the unit powers on. The unit will display "CLEAR?" press [ENTER] to reset error and error logs. The unit will respond with "OK".<br><br>
- There doesn't seem to be any rhyme or reason to when the failure occurs. Some have had it happen within three months of new - most after warranty is gone. One unlucky individual had it happen while under warranty; had it repaired and it failed in the exact same manner within two months. Some have had it happen on power-on, others after extended use.<br><br>
__________________________________________________ ____________________<br><br><b>What I want to know...</b><br><br>
- Was yours repaired successfuly? If so did the shop tell you what was replaced?<br><br>
- Circumstances of failure? What was going on when it first failed? There might be a rhyme or reason we haven't found yet.<br><br>
__________________________________________________ ___________________<br><br>
A lot of people have had this problem. If we can ID the problem we can keep from getting scammed by a repair shop, or possible repair them ourselves. Not everyone is comfortable with or capable of poking around in the guts of their receiver, but an informed consumer can help save time for a reputable shop to affect a repair.<br><br>
Jim
I am attempting to troubleshoot a used Pioneer VSX-820-K that I purchased that powers itself off after a few seconds.

When I press the [STANDBY/ON] + [<- PRESET] buttons a DC error code is present. I have tried clearing the fault code but it returns.

I removed the amplifier assembly and ohm'd all of the MOSFETS. Most of them ohm out approximately the same and none are shorted. With the amplifier assembly disconnected and removed, the receiver continues to power itself off after a few seconds and also continues to generate an DC error code.

I watched a YouTube video wherein "WaybackTECH" removed the amplifier assembly from the circuit in his VSX820-K, and his unit remained energized after clearing the error and pressing the power button.

Do you have any suggestions of what I might want to check on next? Thank you for any help you can provide.

Thank You
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post #113 of 114 Old 06-13-2017, 02:24 PM
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I am attempting to troubleshoot a used Pioneer VSX-820-K that I purchased that powers itself off after a few seconds.

When I press the [STANDBY/ON] + [<- PRESET] buttons a DC error code is present. I have tried clearing the fault code but it returns.

I removed the amplifier assembly and ohm'd all of the MOSFETS. Most of them ohm out approximately the same and none are shorted. With the amplifier assembly disconnected and removed, the receiver continues to power itself off after a few seconds and also continues to generate an DC error code.

I watched a YouTube video wherein "WaybackTECH" removed the amplifier assembly from the circuit in his VSX820-K, and his unit remained energized after clearing the error and pressing the power button.

Do you have any suggestions of what I might want to check on next? Thank you for any help you can provide.

Thank You
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post #114 of 114 Old 09-06-2017, 04:27 PM
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Emitter Collector reading.

I also have an output problem with a VSX-522. I have disassembled the main amp board and disconnected the leads from the output transistors. I am getting a reading on the diode test between collector and emitter of .52. It is also reading around 1.2 Meg Ohm between these two terminals. This reading is on about half the output transistors the other half give a 0 reading between emitter and collector.

Does this reading mean that the transistor is faulty or is it an acceptable tolerance?

Thanks,

John
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