|
|||||||||
|
Thread Tools | Search this Thread |
June 1st, 2005, 10:10 AM | #16 |
Regular Crew
Join Date: Feb 2005
Location: Kingston, Ontario
Posts: 96
|
Me ( Sorry Rob)
Hey everyone, just to clear Rob from the blame. It was I who said the comment about connecting while off. You can believe what you want. I have been a computer tech for about 10 years. Of that time I've experienced problems similar to the problems encountered with the firewire connection stated above. Fire wire is designed to work the way you have stated "in theory". I totally agree. However if things aren't properly grounded ( sometimes even if they are) you can run the risk of distributing a static charge to a device or a firewire port. Is it rare.. absolutely, but it does happen. If the device is off during connection it reduces this risk of affecting that device. It's just my 2 cents worth. Sorry if I offended anyone. Cheers
|
June 1st, 2005, 07:04 PM | #17 |
Trustee
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
|
I would agree with Darrin. While it SHOULD be safe to do hot plugging/unplugging with firewire, there is still some risk that can be avoided totally just by switching off the devices. The connectors are well designed but not foolproof, and it is possible to short power or signal pins to the metal shell of the mating connector if you are not careful.
Richard |
June 1st, 2005, 08:16 PM | #18 |
Regular Crew
Join Date: Mar 2005
Location: Kirkland, WA
Posts: 191
|
So, now I know...
I've been on a trip the last couple days and have had some time to think about this.
First off, in the "Eeek.." posting mentioned earlier, I mentioned that Canon tech service mentioned a "bent pin" in my camera's 1394 port. I used this as my assumption that the camera was the problem, which is why I went merrily along and plugged it into a computer that was probably to blame. "Damn..." I think, if they had just pointed me to the possibility of the computer being at blame, a lot of problems could have been avoided. The 1394 port it was connected to was Mother Board based, not an extra card, and the MOBO is a fairly new, quality board. (Gigabyte ) Thanks for many of your replys, and I'll answer some of them here. As noted earlier, the act of hot plugging and switching the camera is moot...I never attempted plugging the camera in "hot", instead, it was always in the off position when plugging the 1394 into it. The computer is grounded, with a three wire (positive, neutral, ground) connection, and that was not a problem...Also, it was surge protected as well. What I've learned from the posts I've gotten here, and others that I've read elsewhere, is that 1394 seems to be a fragile monster, and it can get really ticked off and eat your equipment, without warning, if it wants to. (i.e. It's cheap!) So, that said, does anyone have any ideas on how to test a 1394 to see if it's bad, or about to be bad? (more) |
June 1st, 2005, 08:17 PM | #19 |
Major Player
Join Date: Sep 2004
Location: Maryland, USA
Posts: 382
|
Ever try installing/replacing with a new firewire card? So far it seems the only common failure point is the port itself as everything else has been swapped on some level.
__________________
PAL shooter in NTSC territory |
June 1st, 2005, 08:23 PM | #20 |
Regular Crew
Join Date: Mar 2005
Location: Kirkland, WA
Posts: 191
|
New playback gear
Continued...
This next part could almost be a new thread...I really believe the best way out of this mess is to buy equipment that would act as the playback medium for the tapes. This way, if I fry that, it won't be as expensive. That said, if I got an inexpensive digital camera, would it properly reflect the images in the camera. That is, would it properly send 24P, 16X9, 30P, etc., and would the quality be the same. (I know that digital is all 1's and 0's, and while all 1's and 0's are created equally, some 1's and 0's are more equal than others!!! Whew!!! That was Orwellian!) Kidding aside, I have heard that there are quality issues and other issues with using other/cheaper or older digital cameras or playback devices with the XL2 DV tape. Any thoughts? |
June 1st, 2005, 08:24 PM | #21 |
Regular Crew
Join Date: Mar 2005
Location: Kirkland, WA
Posts: 191
|
Patrick...Yeah, I got a new 1394 card, tried it and nothing...Also, tried a 1394 on another computer. Nothing
Bill |
June 1st, 2005, 10:17 PM | #22 |
Tourist
Join Date: Jun 2005
Posts: 2
|
I thought I should chime in regarding the frying of Firewire ports on cameras by computers. Two years ago we had the firewire port on both of our DV cameras go bad in the same week, and we're all but convinced that they were fried by one of our Mirrored Drive Door Powermacs. We had the motherboard checked by Apple and they found nothing wrong with it, but if I remember correctly they replaced it anyhow. We haven't had any problems since, but that Powermac has since been retired as an office computer, and doesn't get any cameras connected to it. So I would definitely say it's possible, it happens, and it's an expensive and rare issue.
|
June 2nd, 2005, 04:58 AM | #23 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
|
Patrick: I have to respectfully disagree with you.
Let me try to explain to you what I think: 1. why would/does anyone care what the standard says? A lot of things are being said that turn out to be not true in the real world. It is fine that the standard supports connecting devices that are powered on, but that is no garantuee both the cable and connector are 100% to spec (some manufacturing can result in slight changes from 100% spec!) 2. what problem is it to turn of the camera if this can possibly save it from harm? I've yet to hear of a camera that does not work if it is connected powered down and then turned on 3. so in this light I (and a lot of others) find it okay to use the word "wise". Whether or not you want to call it a "wive's tale". And yes, I am using my "power" as a wrangler to tell everyone to turn there camera off before connecting and disconnecting it. I don't want more people to blow their ports! We have had TONS (at least 25, but probably more) users here who've had busted firewire ports. Whether or not the "standard allows" for this to happen or not is of no real concern to me (or the people with blown ports), now is it? It's not like this problem is just happening now. It has been going on for a long time. We are just instructing people to be safe, no harm in that. Okay, with that I would like to end this discussion on what to do or not to do. Both points of view have been clearly explained and everybody can read them and form their own opinion on the matter. I'm going to "excersize" my role as wrangler to get us back on track after this if needed. Thanks in advance for contuining with the original topic of the thread!
__________________
Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge | Lady X Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors |
June 2nd, 2005, 08:44 AM | #24 | |
Tourist
Join Date: Jun 2005
Posts: 2
|
Quote:
Matthew Cockrell Matthew Cockrell |
|
June 3rd, 2005, 02:52 AM | #25 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
|
Good tip Matthew, always good to try and reset everything back to basics!
__________________
Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge | Lady X Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors |
June 3rd, 2005, 08:57 AM | #26 |
Regular Crew
Join Date: Mar 2005
Location: Kirkland, WA
Posts: 191
|
Hmmm. Will do. It's worth a try.
|
June 3rd, 2005, 01:24 PM | #27 |
Regular Crew
Join Date: Oct 2004
Location: Cambridge, UK
Posts: 57
|
Frying Firewire?
Hi.
I work in a camera shop here in the Uk and recently had a customer bring in a camcorder that he swore had 100v 'live' on the chassis. So we sent it to out repairers. I soon got a phone call form the engineer about it. It seems that because the power cable for the transformer is not earthed (it’s just a two-pin connection) you get a 'floating voltage' through the unit that might show up on a meter. He also told me they regularly have blown firewire sockets on camcorders because of this. He said that one way round this camera-to-computer hot swapping is to use the camera on battery power. I know this is not always practical, and as I am not electrically minded I might have got the techno-speak wrong but I always transfer my footage using battery as I normally shoot very small lengths each time. Hope this might help a little. Regards, Oliver. |
| ||||||
|
Thread Tools | Search this Thread |
|