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#1
Posted to rec.audio.pro
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Radar 24 Problem
All was working fine and then the output went close to zilch in level
with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? --- This email has been checked for viruses by AVG. http://www.avg.com |
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#2
Posted to rec.audio.pro
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Radar 24 Problem
On 3/7/2017 6:46 PM, Rick Ruskin wrote:
All was working fine and then the output went close to zilch in level with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? Clock gone haywire? Maybe accidentally switched to the wrong word clock source? -- For a good time, call http://mikeriversaudio.wordpress.com |
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#3
Posted to rec.audio.pro
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Radar 24 Problem
On Tuesday, March 7, 2017 at 5:46:03 PM UTC-6, Rick Ruskin wrote:
All was working fine and then the output went close to zilch in level with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? If you have a scope, you can check and see where the oscillation is. Don't forget to look st the supply rails. By the way, what frequency is the oscillation? Peace, Paul |
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#4
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
All was working fine and then the output went close to zilch in level with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? When 24 seemingly independent channels all have the same problem, look at the power supply. First check rail voltages. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#5
Posted to rec.audio.pro
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Radar 24 Problem
On Tue, 7 Mar 2017 19:15:31 -0500, Mike Rivers
wrote: On 3/7/2017 6:46 PM, Rick Ruskin wrote: All was working fine and then the output went close to zilch in level with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? Clock gone haywire? Maybe accidentally switched to the wrong word clock source? Definitely not that. |
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#6
Posted to rec.audio.pro
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Radar 24 Problem
On Tue, 7 Mar 2017 16:28:46 -0800 (PST), PStamler
wrote: On Tuesday, March 7, 2017 at 5:46:03 PM UTC-6, Rick Ruskin wrote: All was working fine and then the output went close to zilch in level with distortion on all channels. This is with pre-recorded and incoming signals. The analog input meters also show an oscillation from somewhere. ADAT input meters show incoming do not show the oscillation. Any ideas as to what I should be looking for? If you have a scope, you can check and see where the oscillation is. Don't forget to look st the supply rails. By the way, what frequency is the oscillation? Peace, Paul I had a scope but it died last week. As did my MX2424 before that. Now the RADAR has gone dowm. I hope it is as simple as the power supply. Getting it checked out on a friend's bench later this week. Good thing I still have a working HD24. |
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#7
Posted to rec.audio.pro
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Radar 24 Problem
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#8
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
I had a scope but it died last week. As did my MX2424 before that. Fix the scope first. Now the RADAR has gone dowm. I hope it is as simple as the power supply. Getting it checked out on a friend's bench later this week. Well, the bad news is that the power supply on th RADAR isn't exactly simple.... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#9
Posted to rec.audio.pro
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Radar 24 Problem
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#10
Posted to rec.audio.pro
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Radar 24 Problem
I had a scope but it died last week. As did my MX2424 before that.
Now the RADAR has gone dowm. That's a lot of equipment mortality. Can you borrow a recording line-voltage monitor? Peace, Paul |
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#11
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
On 7 Mar 2017 22:13:44 -0500, (Scott Dorsey) wrote: Well, the bad news is that the power supply on th RADAR isn't exactly simple.... What's different/complicated about it? As I recall, it's got switchers with filtering and linear regulation all together to keep the weight and noise down at the same time. It's not horrible like an ATX supply, but I remember it as not being straightforward. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#12
Posted to rec.audio.pro
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Radar 24 Problem
On 3/8/2017 8:56 AM, Scott Dorsey wrote:
Well, the bad news is that the power supply on th RADAR isn't exactly simple.... As I recall, it's got switchers with filtering and linear regulation all together to keep the weight and noise down at the same time. It's not horrible like an ATX supply, but I remember it as not being straightforward. Yeah, but you can buy a replacement ATX supply for $20 or so. I've never seen inside a RADAR so I don't know what voltages and type of connectors it uses. It could be easy to replace, or require an expensive original part (if IZ even still has any). But before worrying about what the power supply actually is, it should be determined first that it's actually the problem. It could be just a pesky electrolytic capacitor on a board somewhere, maybe even one that's knocking the clock out of kilter. -- For a good time, call http://mikeriversaudio.wordpress.com |
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#13
Posted to rec.audio.pro
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Radar 24 Problem
Here's what we discovered: The power supply measures fine at the
conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR |
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#14
Posted to rec.audio.pro
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Radar 24 Problem
On Thursday, March 9, 2017 at 6:42:39 PM UTC-6, Rick Ruskin wrote:
Here's what we discovered: The power supply measures fine at the conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR Shorted bypass capacitor? And did you find what was oscillating? Peace, Paul |
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#15
Posted to rec.audio.pro
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Radar 24 Problem
On Thu, 9 Mar 2017 17:29:07 -0800 (PST), PStamler
wrote: On Thursday, March 9, 2017 at 6:42:39 PM UTC-6, Rick Ruskin wrote: Here's what we discovered: The power supply measures fine at the conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR Shorted bypass capacitor? And did you find what was oscillating? Peace, Paul Don't know yet. I just got the info as to how to remove the cards. There is quite a bit in the way and the path to removing that stuff requires a roadmap. Going to tackle it tomorrow. RR |
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#16
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
On Thu, 9 Mar 2017 17:29:07 -0800 (PST), PStamler wrote: On Thursday, March 9, 2017 at 6:42:39 PM UTC-6, Rick Ruskin wrote: Here's what we discovered: The power supply measures fine at the conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR Shorted bypass capacitor? And did you find what was oscillating? Peace, Paul Don't know yet. I just got the info as to how to remove the cards. There is quite a bit in the way and the path to removing that stuff requires a roadmap. Going to tackle it tomorrow. RR Good hunting. -- Les Cargill |
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#17
Posted to rec.audio.pro
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Radar 24 Problem
On Fri, 10 Mar 2017 18:01:02 -0600, Les Cargill
wrote: Rick Ruskin wrote: On Thu, 9 Mar 2017 17:29:07 -0800 (PST), PStamler wrote: On Thursday, March 9, 2017 at 6:42:39 PM UTC-6, Rick Ruskin wrote: Here's what we discovered: The power supply measures fine at the conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR Shorted bypass capacitor? And did you find what was oscillating? Peace, Paul Don't know yet. I just got the info as to how to remove the cards. There is quite a bit in the way and the path to removing that stuff requires a roadmap. Going to tackle it tomorrow. RR Good hunting. The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Buttoned it up with the remaining 16 channels but some other problems arouse. IZ support recommended going back in and reseating everything and resetting the CMOS. Will deal with this over the weekend. If I get it running, I'll send the bad card in for repair and get back to full strength. --- This email has been checked for viruses by AVG. http://www.avg.com |
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#18
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Do these burn marks happen to occur in a place where a tantalum capacitor used to be? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#19
Posted to rec.audio.pro
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Radar 24 Problem
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#20
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
On 10 Mar 2017 21:55:36 -0500, (Scott Dorsey) wrote: Rick Ruskin wrote: The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Do these burn marks happen to occur in a place where a tantalum capacitor used to be? Not that I could tell. Sending it back for repair. Certain kinds of failures tend to happen in clusters, so find out what actually failed from the factory guys so you know if you need to do any pre-emptive maintenance elsewhere. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#21
Posted to rec.audio.pro
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Radar 24 Problem
On 10/03/2017 2:41 PM, Rick Ruskin wrote:
On Thu, 9 Mar 2017 17:29:07 -0800 (PST), PStamler wrote: On Thursday, March 9, 2017 at 6:42:39 PM UTC-6, Rick Ruskin wrote: Here's what we discovered: The power supply measures fine at the conncector but loses the +18 when mated to the board. The assumption is that there is a failure on 1 or more of the analog cards dragging the supply down. Hopefully we will find the culprit(s) tomorrow. RR Shorted bypass capacitor? And did you find what was oscillating? Peace, Paul Don't know yet. I just got the info as to how to remove the cards. There is quite a bit in the way and the path to removing that stuff requires a roadmap. Going to tackle it tomorrow. RR Hopefully it will be visually obvious which the component is that is dragging the rail down. Else see if you can narrow it down by isolating sections by halves - hopefully you can do that without cutting tracks. If it is a bypass electrolytic (the most likely culprit) possibly worth the effort of making a 'project' out of replacing all similar caps on the power rails. geoff |
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#22
Posted to rec.audio.pro
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Radar 24 Problem
On Sun, 12 Mar 2017 13:17:14 +1300, geoff
wrote: Snip Hopefully it will be visually obvious which the component is that is dragging the rail down. Else see if you can narrow it down by isolating sections by halves - hopefully you can do that without cutting tracks. If it is a bypass electrolytic (the most likely culprit) possibly worth the effort of making a 'project' out of replacing all similar caps on the power rails. geoff You must have missed this: The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Buttoned it up with the remaining 16 channels but some other problems arouse. IZ support recommended going back in and reseating everything and resetting the CMOS. Will deal with this over the weekend. If I get it running, I'll send the bad card in for repair and get back to full strength. RR --- This email has been checked for viruses by AVG. http://www.avg.com |
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#23
Posted to rec.audio.pro
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Radar 24 Problem
On 13/03/2017 6:34 a.m., Rick Ruskin wrote:
On Sun, 12 Mar 2017 13:17:14 +1300, geoff wrote: Snip Hopefully it will be visually obvious which the component is that is dragging the rail down. Else see if you can narrow it down by isolating sections by halves - hopefully you can do that without cutting tracks. If it is a bypass electrolytic (the most likely culprit) possibly worth the effort of making a 'project' out of replacing all similar caps on the power rails. geoff You must have missed this: The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Buttoned it up with the remaining 16 channels but some other problems arouse. IZ support recommended going back in and reseating everything and resetting the CMOS. Will deal with this over the weekend. If I get it running, I'll send the bad card in for repair and get back to full strength. RR --- This email has been checked for viruses by AVG. http://www.avg.com Yeah - been away a week . Catching up. g. |
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#24
Posted to rec.audio.pro
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Radar 24 Problem
On Sunday, March 12, 2017 at 4:46:47 PM UTC-4, geoff wrote:
On 13/03/2017 6:34 a.m., Rick Ruskin wrote: On Sun, 12 Mar 2017 13:17:14 +1300, geoff wrote: Snip Hopefully it will be visually obvious which the component is that is dragging the rail down. Else see if you can narrow it down by isolating sections by halves - hopefully you can do that without cutting tracks. If it is a bypass electrolytic (the most likely culprit) possibly worth the effort of making a 'project' out of replacing all similar caps on the power rails. geoff You must have missed this: The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Buttoned it up with the remaining 16 channels but some other problems arouse. IZ support recommended going back in and reseating everything and resetting the CMOS. Will deal with this over the weekend. If I get it running, I'll send the bad card in for repair and get back to full strength. RR --- This email has been checked for viruses by AVG. http://www.avg.com Yeah - been away a week . Catching up. A Ton of new post here, so I can understand!!  Jack g. |
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#25
Posted to rec.audio.pro
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Radar 24 Problem
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#26
Posted to rec.audio.pro
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Radar 24 Problem
On Sat, 11 Mar 2017 01:55:34 +0000 (UTC), Rick Ruskin
wrote: snip The analog i/o card for channels 9-16 went south. Burn marks next to U5 IC. Buttoned it up with the remaining 16 channels but some other problems arouse. IZ support recommended going back in and reseating everything and resetting the CMOS. Will deal with this over the weekend. If I get it running, I'll send the bad card in for repair and get back to full strength. --- Resetting the CMOS did the trick. Remaining 16 channels are behaving as designed. RR --- This email has been checked for viruses by AVG. http://www.avg.com |
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#27
Posted to rec.audio.pro
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Radar 24 Problem
On 3/13/2017 5:04 PM, Rick Ruskin wrote:
Resetting the CMOS did the trick. Remaining 16 channels are behaving as designed. That's pretty good news. After all, 16 tracks should be enough for anybody.  -- For a good time, call http://mikeriversaudio.wordpress.com |
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#28
Posted to rec.audio.pro
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Radar 24 Problem
On Mon, 13 Mar 2017 17:27:46 -0400, Mike Rivers
wrote: On 3/13/2017 5:04 PM, Rick Ruskin wrote: Resetting the CMOS did the trick. Remaining 16 channels are behaving as designed. That's pretty good news. After all, 16 tracks should be enough for anybody. Most of the time but not always. RR --- This email has been checked for viruses by AVG. http://www.avg.com |
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#29
Posted to rec.audio.pro
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Radar 24 Problem
Rick Ruskin wrote:
On Mon, 13 Mar 2017 17:27:46 -0400, Mike Rivers wrote: On 3/13/2017 5:04 PM, Rick Ruskin wrote: Resetting the CMOS did the trick. Remaining 16 channels are behaving as designed. That's pretty good news. After all, 16 tracks should be enough for anybody. Most of the time but not always. I don't see what you have to complain about. All 16 sound the same, you don't have to put bass on track 1 because the gap is opening up... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#31
Posted to rec.audio.pro
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Radar 24 Problem
"Mike Rivers" wrote in message
news  On 3/13/2017 5:04 PM, Rick Ruskin wrote: Resetting the CMOS did the trick. Remaining 16 channels are behaving as designed. That's pretty good news. After all, 16 tracks should be enough for anybody. I know you're used to sixteen or more. Sorry, we only have eight. |
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Linear Mode
