Cold weather & printers

[Ken Leyba]

Just for grins I looked up the operating evironment for a HP Laserjet
4240 and the specs say:

Environmental condition Printing 10? to 32?C (50? to 90?F)
Storage/standby Temperature (printer and print cartridge) 0? to 35?C
(32? to 95?F)

I would look at the specs for your printer and it looks like they are
operating out of spec.  Plus if the temperature varies drastically the
expansion and contraction of components are probably creating havoc. 
I'd have them do something about the environment or tell them that
they cannot expect support for the printers.

Ken

On 12/8/05, Mike Reinehr <cmr at amsent.com> wrote:
> On Thursday 08 December 2005 10:02 am, Vu Pham wrote:
> > > -----Original Message-----
> > > From: linux-users-bounces at linux-sxs.org
> > > [mailto:linux-users-bounces at linux-sxs.org] On Behalf Of Mike Reinehr
> > > Sent: Thursday, December 08, 2005 9:18 AM
> > > To: linux-users at linux-sxs.org
> > > Subject: Re: Cold weather & printers
> > >
> > > On Thursday 08 December 2005 08:10 am, Vu Pham wrote:
> > > > > -----Original Message-----
> > > > > From: linux-users-bounces at linux-sxs.org
> > > > > [mailto:linux-users-bounces at linux-sxs.org] On Behalf Of Net Llama!
> > > > > Sent: Tuesday, December 06, 2005 2:59 PM
> > > > > To: Linux tips and tricks
> > > > > Subject: Re: Cold weather & printers
> > > > >
> > > > > On Tue, 6 Dec 2005, Vu Pham wrote:
> > > > > > Can the cold weather have anything to do with the
> > >
> > > printer problem ?
> > >
> > > > > Most definitely.  Keep in mind that printers need to warm up when
> > > > > first powered on.
> > > >
> > > > It is. This morning it is around 30 F again, and I just got a call
> > > > about the same problem.
> > > >
> > > > Vu
> > >
> > >     Vu,
> > >
> > > Is this a laser printer, and, is it programmed to go into an
> > > energy saving mode after a period of inactivity. If so,
> > > perhaps disabling the energy saving mode, might help.
> >
> > Yes, I tried it but it doesn't help.
> >
> > The tcpdump outsput shows the packets are so cold that they are corrupted
> > <g>. You can see below that the printer sent the Reset back to the server.
> >
> > [root at pepper root]# tcpdump -n -i eth1 host 192.168.248.65
> > tcpdump: listening on eth1
> > 10:06:43.810021 192.168.248.65.jetdirect > 192.168.249.22.48318: R 0:0(0)
> > win 5840
> > 10:07:01.804723 192.168.249.22.48318 > 192.168.248.65.jetdirect: S
> > 869779140:869779140(0) win 5840 <mss 1460,sackOK,timestamp 726552935
> > 0,nop,wscale 0> (DF)
> > 10:07:31.807759 192.168.248.65.jetdirect > 192.168.249.22.48318: R 0:0(0)
> > win 5840
> > 10:09:07.814764 192.168.249.22.48321 > 192.168.248.65.jetdirect: S
> > 1102104625:1102104625(0) win 5840 <mss 1460,sackOK,timestamp 726565536
> > 0,nop,wscale 0> (DF)
> > 10:09:10.814712 192.168.249.22.48321 > 192.168.248.65.jetdirect: S
> > 1102104625:1102104625(0) win 5840 <mss 1460,sackOK,timestamp 726565836
> > 0,nop,wscale 0> (DF)
> > 10:09:16.814714 192.168.249.22.48321 > 192.168.248.65.jetdirect: S
> > 1102104625:1102104625(0) win 5840 <mss 1460,sackOK,timestamp 726566436
> > 0,nop,wscale 0> (DF)
> > 10:09:28.814718 192.168.249.22.48321 > 192.168.248.65.jetdirect: S
> > 1102104625:1102104625(0) win 5840 <mss 1460,sackOK,timestamp 726567636
> > 0,nop,wscale 0> (DF)
> > 10:09:37.816752 192.168.248.65.jetdirect > 192.168.249.22.48321: R 0:0(0)
> > win 5840
> >
> > I thought the temperature could only affect the mechanics part, not the
> > eletronics.
> >
> > Vu
>
>         I don't have any experience with tcpdump so I'm not sure what the above dump
> should be telling me, but within normal extremes I would agree. But this
> still could be a mechanical problem. At these low temperatures, perhaps, the
> Jetdirect circuit card is not making good contact within it's slot. You could
> try unplugging it, cleaning all the contacts well and re-seating it.
> Likewise, any other mechanical connections of electronic components in the
> printer.
>
>         Hey, if you can not locate a heater near the printer you always could wrap it
> in a blanket! ;-)
>
> Cheers!
>
> cmr
>
> --
> Debian 'Sarge': Registered Linux User #241964
>
> "More laws, less justice." -- Marcus Tullius Ciceroca, 42 BC
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--
Ken Leyba
"I think you're the opposite of a paranoid. I think you go around with
the insane delusion that people like you."-Harry Block, Deconstructing
Harry