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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 30 May 2020, 10:20 
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barberon wrote:
Hello.
I have DVL-919E with no power. After power on red light is blinking every 2-3 seconds. And nothing more.
Anybody face this problem ? I think that problem with c111 (big Nichicon capacitor). I want to replace it.


How do you know it's that cap? Is it bulging or leaking? I would at least get an esr meter to test before swapping in random caps.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 30 May 2020, 11:15 
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odotb3 wrote:
How do you know it's that cap? Is it bulging or leaking? I would at least get an esr meter to test before swapping in random caps.


It's my decision based on similar cases, that i studied. But i want more information about this case, because those cases was not with dvl-919e.
20 years old - capacity may significantly reduсed. And c111 more than others affects on voltage drop.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 30 May 2020, 12:57 
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barberon wrote:
odotb3 wrote:
How do you know it's that cap? Is it bulging or leaking? I would at least get an esr meter to test before swapping in random caps.


It's my decision based on similar cases, that i studied. But i want more information about this case, because those cases was not with dvl-919e.
20 years old - capacity may significantly reduсed. And c111 more than others affects on voltage drop.


Have you actually tested the voltages? Do you have an esr meter to test the caps? I have no experience in fixing this machine but basic trouble-shooting methods can still be followed.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 30 May 2020, 13:31 
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odotb3 wrote:
barberon wrote:
odotb3 wrote:
Have you actually tested the voltages? Do you have an esr meter to test the caps? I have no experience in fixing this machine but basic trouble-shooting methods can still be followed.


Unfortunately i have no esr meter. And testing of voltage on circuit board is seems to be a problem for me because of player construction.
I can only extract power circuit board and plug in 220v, but without load voltage may be ok.
I think that blinking every 2-3 sec red power led indirectly tells about low capacity of c111, but not sure for 100%.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 30 May 2020, 14:59 
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So.... desolder the cap. Get an esr meter and test it. No point just guessing. Hopefully someone knows what the exact fault is and can guide you.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 16 Sep 2020, 21:43 
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Add me to the list, except mine is a DVL-91. I've pulled the board and testing as best as I can with a multimeter, but I really don't know what I'm doing. Watching videos and trying to figure out how to identify the problem component(s). Anyone want to help a rookie out?
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 16 Sep 2020, 23:24 
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The DVL-91 has arc suppression unlike the DVL-919. Check your fuse and if blown clip one leg of D105.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 17 Sep 2020, 03:31 
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The fuse is not blown. I verified with a multimeter and made the measurement with it outside the board.

No apparent bulging of any of the capacitors on the power board. There is brown discoloration and crusty stuff at the pins of IC411.

cplusplus wrote:
The DVL-91 has arc suppression unlike the DVL-919. Check your fuse and if blown clip one leg of D105.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 17 Sep 2020, 15:58 
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I need to correct myself on saying the DVL-919 does not have arc suppression. The North American model does and uses the same power supply as the DVL-91.

Attached is the schematic of VWR-1286

Either way, that is the easy fix. The more experienced members might know of other particular problematic parts of this board. Also this should be of interest: [DVL-909] Won't power on


Attachments:
VWR-1286.jpg
VWR-1286.jpg [ 301.39 KiB | Viewed 1530 times ]


Last edited by cplusplus on 18 Sep 2020, 20:04, edited 1 time in total.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 17 Sep 2020, 16:08 
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Thank you for your help. Is the easy fix you refer to in your post the clipping of on leg of D-105? Would removing it accomplish the same thing?

quote="cplusplus"]I need to correct myself on saying the DVL-919 does not have arc suppression. The North American model does uses the same power supply as the DVL-91.

Attached is the schematic of VWR-1286

Either way, that is the easy fix. The more experienced members might know of other particular problematic parts of this board. Also this should be of interest: [DVL-909] Won't power on[/quote]
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 17 Sep 2020, 20:02 
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chente wrote:
Thank you for your help. Is the easy fix you refer to in you post the clipping of on leg of D-105? Would removing it accomplish the same thing?


Yes, but since you verified that your fuse is good, this shouldn't be the issue.

You can start by checking output voltages and tracing backwards, checking the other fuses, etc but if you aren't familiar debugging switching power supplies I'd just give replacing C116 a shot. I'd also recommend recapping the board (if you have decent soldering skills) since you already have it out and are going to have to order at least one.

Attached is the location of C116 mentioned in the above linked post.


Attachments:
VWR1286_C116.jpg
VWR1286_C116.jpg [ 383.88 KiB | Viewed 1518 times ]
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 18 Sep 2020, 23:49 
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I'm looking through the service manual and can't identify which capacitors are used in the power board. I can read some of them on the board but there are several other ones that don't have the rating on them. The service manual has a list under the various components but are not listed under the power board section (Page 66). Not sure what to buy. Am I missing it somehow?
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 19 Sep 2020, 00:25 
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The values will be on the capacitors themselves. Only look at the aluminum electrolytic capacitors. You will see markings like 400v 1uf 85C. You just need to match the voltage (V) and microfarads (uF) and make sure the height and width of the replacement capacitors fit. I'd use 105C (this is the temperature rating in celsius) on the primary side of the power supply (i.e. C111, C116, etc).

I recommend Nichicon capacitors and you can order them from Digikey or Mouser.

This will hopefully fix the problem, but even if it doesn't this will still beneficial.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 19 Sep 2020, 00:36 
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Thanks. Yeah, I can match those. So no need to replace the blue ones shown in your photo above. Those were the ones I couldn't identify.

cplusplus wrote:
The values will be on the capacitors themselves. Only look at the aluminum electrolytic capacitors. You will see markings like 400v 1uf 85C. You just need to match the voltage (V) and microfarads (uF) and make sure the height and width of the replacement capacitors fit. I'd use 105C (this is the temperature rating in celsius) on the primary side of the power supply (i.e. C111, C116, etc).

I recommend Nichicon capacitors and you can order them from Digikey or Mouser.

This will hopefully fix the problem, but even if it doesn't this will still beneficial.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 19 Sep 2020, 01:20 
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chente wrote:
So no need to replace the blue ones shown in your photo above.

Correct. Only other issue should be ensuring that you insert the replacements correctly since they are polar. The stripe on the board and capacitor indicates it is negative. Additionally if you are not decent at soldering, you might want to see if there is someone local who could recap this for you. There are probably a lot of video tutorials though you could look at.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 21 Oct 2020, 23:05 
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Finally got around to recapping my player and sadly still no power. This was my first time desoldering and soldering so I'm going to pull the board and recheck it.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 21 Oct 2020, 23:37 
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Need to make sure you matched the uF and voltage and they are turned the right way (they are polar like batteries). And of course make sure the solder joints are good.

If you have a multimeter you need to see where the voltage stops.
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 22 Oct 2020, 00:00 
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There are several pico fuses which look like resistors sprinkled around the power supply board. Any of these could be blown. You can't see it with the naked eye, you have to check for connectivity between the poles with a meter. P213, P612, P214, P511, P311
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 22 Oct 2020, 00:30 
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Can I do that with a multimeter while they are installed?

blam1 wrote:
There are several pico fuses which look like resistors sprinkled around the power supply board. Any of these could be blown. You can't see it with the naked eye, you have to check for connectivity between the poles with a meter. P213, P612, P214, P511, P311
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 Post subject: Re: [DVL-919] RD/RA No Power
PostPosted: 22 Oct 2020, 01:08 
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chente wrote:
Can I do that with a multimeter while they are installed?

Yep.
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