Hi Kevs:
Last time you asked this question, I suggested that perhaps the printer was
getting too hot. Small laser printers can suffer from over-heating if you
keep them running continuously.
However, the weird symbols suggest that the problem here is a "Buffer
Overrun".
You should discuss this with Brother. Ask them if they have a facility in
their printer driver to "Clear memory per page". That resets the printer
memory at the beginning of making up each page of the image.
If that switch is available, it might ‹ no guarantees ‹ cure the problem.
It will also make the printer run a lot slower, because it has to stop to
make up each page from scratch each time, instead of being able to re-use
common content such as fonts.
Other than that: Bob's suggestion is worth investigating. It could be that
your USB cable can't pump enough data to keep the printer's buffer full (a
"buffer underrun").
One of the little-known characteristics of USB is that it is a
bandwidth-sharing system. It has a fixed data speed, which it divides up
among all the devices plugged in at the time.
What they DON'T tell you is that there are four "standard" speeds for a USB
connection. As you plug each device in, the USB controller asks it what
speed it wants. It then ‹ and this is the important part ‹ slows down the
whole USB bus to the speed requested by the slowest device connected.
The other thing to realise is that a computer normally has only ONE USB
controller for each PAIR of USB ports. In my case, I have two USB
connections to this computer, so chances are there is only one USB
controller on the motherboard. This is significant because the thing that
slows down is the Controller, not the piece of wire.
So if I plug a device with low data demand (say, a mouse...) into one of my
USB ports, and a device with high data demand (say, a printer...) into the
other ‹ chances are the printer could have the exact same problem you are
seeing. Running at the slow USB speed, there is a chance that the printer
simply can't suck enough data out of the computer to keep up.
If you have a keyboard and mouse plugged in by USB, try unplugging
everything except the printer when you are running these jobs.
Hope this helps
I still trying to get my head around this.
ON a previous thread, some people gave some good tips, but I still don't get
it.
I'm printing from Word a single page document to my Brother laser BW
printer.
I would often like to print 100+ copies.
But whenever I do anything even over 30. 40+ copies what happens is first
bunch come out ok, and then things freeze up, and the sheets start coming
out with bizarre symbols.
Thanks
Kevs
OS 10.4.11
Office 2004
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John McGhie, Consultant Technical Writer
McGhie Information Engineering Pty Ltd
http://jgmcghie.fastmail.com.au/
Nhulunbuy, Northern Territory, Australia
+61 4 1209 1410, mailto:
[email protected]