> Anyone have the manual, or at least have some idea what "50
> SERVICE" means I need to do?
"50 SERVICE" means the fuser is not up to temperature. This is
usually one of three things, the fuser element, the thernal
cutout or the fuser power supply has failed.
The element and the cutout can be measured with a VOM and should
be < 20 ohms. The easiest way to test the PSU is to swap it with
a known good one if you have one.
There is a power on timer that takes a long time to discharge so
it can take turning the printer off for 20 minutes to clear this
fault.
Lee.
Looking for 1Mx8 EPROMs (27C080 or 27C801)
Eric Smith eric at brouhaha.com
<mailto:cctalk%40classiccmp.org?Subject=Looking%20for%201Mx8%20EPROMs%20%282
7C080%20or%2027C801%29&In-Reply-To=001501c8c898%24e7331d10%24a903a8c0%40andr
ewdesktop>
Sat Jun 7 13:22:24 CDT 2008
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________________________________
Andrew wrote:
> If anyone can help out or knows a low cost supplier of 1Mx8 EPROMs, I
They're not at all hard to find, e.g.,
http://www.unicornelectronics.com/IC/EPROM.html
-----REPLY-----
Hi Eric, Thanks for the reply!
Yes, finding new 1Mx8 EPROMs is not difficult but that isn't what I am
asking about.
They only cost about $10 new and are an excellent value, IMO.
However, I am trying to find some low cost *used* EPROM parts to help out
some homebrew SBC builders.
The N8VEM SBC homebrew computer I designed uses the 27C080 or 27C801 for its
boot device/block device/ROM drive.
I'd like to keep the costs as low as possible and am trying to keep the
EPROM at or below $5 each.
OTPs are an option but they are less desireable than the reuseable parts
with UV windows.
As it turns out, most of the people requesting the PCB for building their
own homebrew computer are also requesting the EPROM.
It rather surprised me as I thought more people would have their own EPROM
programmers and erasers.
I have a limited quantity of the 1Mx8 EPROMs on hand but not very many.
At the rate they are going out with the PCBs, I will exhaust my stock
quickly -- long before I run out of PCBs.
In retrospect, that is probably bad planning on my part this is an amateur
project and I am not a professional businessman.
I found a few more 1Mx8 EPROMs on eBay but that doesn't really solve the
problem.
What I need is the 1Mx8 EPROM equivalent to this website:
http://epromman.com/
I have purchased bulk used EPROMs from "Mr. EPROMMAN" before and they are an
excellent value.
Unfortunately, he doesn't carry the 1Mx8 parts. :-/
Thanks in advance if anyone can help.
Andrew Lynch
Finally, a classic computer question involving insects. If you're dealing
with insects and probably arachnids as well, a small chunk of no-pest strip
should rapidly kill them. I'd enclose the machine in a plastic bag to
concentrate the fumes. Rural King has it. Cheers, John R.
--
I am using the free version of SPAMfighter for private users.
It has removed 129 spam emails to date.
Paying users do not have this message in their emails.
Get the free SPAMfighter here: http://www.spamfighter.com/len
Would you happen to have a manual for unit# TRS9200BBDED (EECO UNIT#)
even a pdf file would work.
Thanks,
Raquel L. Garcia
Electronics Purchasing
PSI Repair Services, Inc.
raquel.garcia at psi-corp.com <mailto:raquel.garcia at psi-corp.com>
734-853-5222 ph.
734-853-5038 fx.
> Date: Mon, 09 Jun 2008 07:55:03 +0100
> From: Gordon JC Pearce
> I can recommend the Freecom Musicpal too, especially with the most
> recent firmware update (unless there's been one since I updated last
> month).
I wound up getting an HP E-PC cheap, disconnecting the CD-ROM drive
and subsituting a CF card for the hard drive (no swap partition). I
can run Linux on it and even use it as a router without drinking a
lot of power. While other devices like the Musicpal may be better
candidates, the PC box gives me the most flexibility.
Cheers,
Chuck
Andrew et al,
For some time I've seen these extremely cheap PC diagnostics cards posted on
ebay
Search www.ebay.com for pc diagnostic isa
and you get something like this
http://cgi.ebay.com/PCI-USB-LPT-Analyzer-Diagnostic-POST-Test-Cards-ISA-PC_…
How about somebody get the ISA version of such a card and see if it's at all
useful.
I suppose it might be able to help you fault find a seemingle dead system
though I am somewhat suspicious.
Regards marcus.
--
marcus bennett amouses at gmail.com
I know this is off-topic, but I'm looking for suggestions and a
solution may involve a "vintage" box. If you feel that discussion of
this on-list isn't appropriate, please email me privately.
Here's my situation. I like to listen to web-based radio and I
transmit an FM signal so that I can listen on any FM radio. It works
very well and I'm happy with that aspect.
However, the system doing this is an old built-like-a-tank 500MHz P3
Compaq Deskpro box running RedHat somehing-or-the other (it's been so
long since I've upgraded it that I don't remember) 24x7. I'd like
something that drinks less power. Interface to the web is via
100BaseT copper. Station switching is accomplished via a simple
shell script and initiated via telnet.
My current thought is that I could pick up something like an HP e-PC
and equip it with a CF hard drive. But a 1.7GHz CPU again seems like
overkill for a very limited application.
Does anyone have any other low-power ideas? Note that most of the
streams I listen to are RA, not MP3.
Thanks!
Chuck
I'm searching for a source of a DRAM memory IC that would have the
following specs:
20-pin DIP DRAM memory chips
(16) 1meg x 4-bit dips make up a bank of 8mb.
Should be 60-ns
Fast Page Mode
non-parity
An example would be Toshiba TC514400AP-60.
Other manufacturers might use the following base part numbers:
Fujitsu MB : 814400
Goldstar GM : 71C4400
Hitachi HM : 514400
Hyundai HY : 514400
Micron MT : 4C4001
Mitsubishi M5M: 44400
Any idea where I could find these would be appreciated.
I'm even up to pulling the DRAM from some old boards, if I can find
someplace that has boards that contain these chips. Maybe an old
printer buffer memory card or something. Certain Epson ActionLaser
printers contained the correct chips.
There's some surface mount versions that won't work, and there's also a
26/20-pin version that won't work. These incorrect dips would have
20-pins, but are laid out in a 26-pin configuration with 10 pins on each
side, separated by a small (3-pin) gap on either side. These seem
popular, but unfortunately, they won't work!
Thanks!
Keith
One can also purchase (very inexpensively) 32 pin DIP-to-PLCC
adapters to enable one to use the still-abundant 1 and 2 Mbit Flash
chips used on PC motherboards. Many of these things have boot block
protection, another big plus if you're worried about inadvertently
destroying the contents. The adapter allows them to programmed in
your favorite ZIF-equipped programmer, if you don't want to enable in-
circuit programming.
FWIW,
Chuck
