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The Good, the Bad and the Intermittent
Part 6 – Dealing with it
Occasionally I wonder what would happen if every one
of our 1900+ clients had video problems at the same time. All of the
service shops in the country could not handle the demand. The fact that
video gear on the whole is really very dependable explains why that
scenario never happens. Kudos to the manufacturers for producing such
quality gear.
Video equipment is made of thousands of components
that are held together with solder, screws, friction, adhesives, and all
sorts of means. Together they take an image from a lens, scan it,
convert it to an electrical signal, process it, and record it. Added to
that video image is time-code information and audio. If you have a
chance, just look at the usual two volume service manuals with hundreds
of pages of operational, mechanical and electrical alignment, mechanical
service information, circuit diagrams, block diagrams, exploded views of
parts, parts lists and lists of required tools and jigs. A quick look at
these and you can understand the incredible engineering marvels these
units are.
To show the extent of our camera service, I have
categorized our repair business below for 2004:
* 6% of repair invoices for presale and prepurchase
check-ups.
* 42% of repair invoices for annual or periodic maintenance.
* 49% of invoices of gear that required repair.
* 3% of invoices for gear with intermittent problems.
Camera set-ups are not included in the above
statistics because they are not considered repairs, but instead
improvements in picture quality. A poor quality picture is most often
due to lack of proper initial camera set-up. More about that in upcoming
articles.
As you can see, the percentages of identifiable
problems are a lot higher than the intermittent ones. However, when you
face those intermittents, the problems can actually be a lot worse. You
and I would most likely agree that a known failure is better that an
intermittent one. When a unit fails you repair or replace it and go on
with your shoot. With intermittent problems, you live in the fear of the
unknown. Will that video I just recorded be any good or not? There is
nothing worse that not trusting you gear. Your livelihood depends upon
the reliability of your equipment.
What do we do about intermittent problems? We take
them very seriously. We first start with getting as much information as
possible about the circumstances leading up to the problem. Was there a
camera or deck warning? What warning was given? RF, servo or error code
number? What were the conditions? High temperature or humidity? Could
bad tape be the problem? Could power source be a problem? Did the unit
in question recently take a hit or fall? (This information can save us a
lot of time in trouble-shooting because we know enough to look for
internal damage) Whas is the age of the unit? Could it be suffering from
the Attack of the Killer Capacitors?
Did you see the problem in the viewfinder during the
bad recording or was it only discovered by the editor weeks after the
shoot? If that is the case, did any other later shoots have problems?
Often we find head clogs that come and go and are not a deck-related
problem at all. VTR heads don’t clog themselves, tape, along with
operating conditions, does.
As many of you whom I have dealt with in the past
know, it is very important to get the actual tape that exhibited the
problem. This tape is the evidence that often leads to resolution of the
problem. We once received a tape with several lines of video missing
resulting in a client that refused to pay the shooter for the job, even
though this was only one bad tape out of several. Upon evaluation of the
tape stock, we found that there was a metal burr on the exit tape guide
inside the tape cassette. This burr was scraping off the oxide as the
tape was recording. With no oxide on that part of tape the result was
missing lines of video. Who supplied the tape stock? The client, of
course. Our videographer got paid for the shoot.
Repairs are pretty straight forward, the
intermittents are not. We will spend phone time with our existing
clients to help them troubleshoot their equipment before they ever ship
it to us. Too often we receive the gear in working condition with no
signs of the problem they had. As with anything mechanical, if a unit
has not been serviced for some time there are usually other maintenance
items that may not have contributed to the problem, but should be taken
care of.
Our procedure is to attempt to recreate the problem
first. We try to duplicate the conditions the crew had as a start. Did
the problem happen when first fired up or was it after five hours of
operation? We heat, cool, shake, or do whatever it takes. As I mentioned
in a previous newsletter on this subject, we have even created a
Florida Room using a small bathroom with a heater and humidifier to
recreate summer humidity conditions. Just this week we ramped it up into
a Guam Room with worse conditions than Florida, to recreate an
intermittent viewfinder problem. We also consult our problems and
solutions database, which was built from our experience performing
10,000+ repairs. Unfortunately, we are sometimes unable to get the unit
to fail.
There is time pressure to get the gear back in
service, which also works against the troubleshooting process. It can
take a week or longer of spot checking equipment to see the failure
happen. The whole procedure is hard on everyone involved.
How do you pay for such service? I doubt you would
find any independent service center that would perform such a service
with a flat rate. Consider a Betacamcorder that has an intermittent
problem with the CCD block. The quick solution for some service centers
is to tell you they need to replace it. It could cost in excess of
$15,000 for a refurbished one. We’ve had more than one occasion where a
client was told, after a brief examination, that he would need a new or
refurbished block , then sent it to us for a second opinion, only to
find out that we were able to trace it to a poor connection, or a
component on its way out. We take whatever time is needed in trouble
shooting, but generally charge a fraction of the true cost for the time
spent trying to recreate the problem. We do charge a minimum charge to
cover our base expenses. Like any other business, we have to take the
‘bad’ intermittent work with the ‘good’ repairs. Hopefully the client
will reevaluate his unit and keep using it himself until it finally
fails consistently and he replaces it. Or he may choose to continue
working it to a point that he can again trust it or just use it as a
back-up.
It is prudent to question the reliability of aged
gear anyway. Older video equipment should be checked for proper
operation on a regular basis, say weekly, to insure maximum reliability.
We occasionally get calls from clients who’ve had a failure a year after
last use. They assume that because it wasn’t used that everything will
work. They forget about the aging issue of components such as rubber
belts and capacitors. These components fail more from lack of use than
actual use!
The moral to this story is that you must be diligent
in your operation and maintenance of your video equipment. All video
gear requires some care to keep up to spec and operate properly. Proper
maintenance helps minimize future problems, and periodic ‘exercise’ or
use of older gear helps increase the reliability and trust factor.
I sincerely hope that this series has been, and will
continue to be helpful to you during the "trying" times of intermittent
problems.
Take care,
Roger
For a complete list of equipment we repair, including
Betacam SP, DVCAM, DVCPRO, DVCPROHD, & DV, check out our
service page at:
www.macievideo.com/broadcast.htm
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