12 Mar
2005
12 Mar
'05
2:55 p.m.
At 10:04 PM 3/12/05 +0000, you wrote:
Good point. I'd forgotten about that.
That's it. The G printer is the graphics version. I have the manual for
it somewhere. I should dig it out and scan it and post it somewhere. The
2671 is a very under rated printer IMO.
The contacts are formed from little copper tits that seem to be lightly
glued to the cable and I've found that if you WIPE the contact area of the
cable that you will most likely wipe the contacts right off of it. If I
have to clean one I rinse it a LOT and GENTLY blot it.
IIRC the
floppy drives in the IPC are subject to the usual HP >>DS<<
floppy disk problem. The grease on the mechanism dries out and the
They are! It's the usual Sony unit, albeit here without the front panel.
The eject mechanism is the same, and suffers from dried out grease.
One minor thing to be aware of is that when you remove the drive from the
Integral, the eject button and spring are loose in the Integral's front
panel. It's best to take them out before they get lost. mechanism doesn't open all the way and when
the user tries to insert or
remove a disk it tears the top head off of the drive. Examine it closely to
be sure that the mechanism opens COMPLETELY before using it. Or better yet,
go ahead and remove the drive then clean off the old grease and relube it
with a GOOD quality grease that won't harden (I use gun grease).
I find it's best to take the eject mechanism totally apart (it's not that
many parts, really clean the grease off, and put the a slight smear of
grease back on. It may take a little more time now, but replacing and
aligning a head takes a lot longer.
BTW I use a HP 2671 Thermal printer on my IPC
and it seems to work fine.
If that's the one I think it is (thermal printer), I have a 2671G
somewhere. It's quite happy using fax paper....
Annoying story. The 2671 is designed to use 216mm wide paper. I went into
a stationery shop over here, and all the had was 210mm rolls (which is
the European standard). I bought one and found the 2671 would print on
it, but yuu had to get it in just the right place on the chassis or it
would jam. The printhead would catch on the edge of the paper and really
snarl up.
So I made a couple of brass spacers to slip over the ends of the paper
roll spindle to keep it in the right place. Worked fine. I was happy.
Until I went to another branch of the same shop. They had 216mm wide fax
rolls too....
The 9845 built-in thermal printer (I happen to have one in many bits on
my bench [1]) seems to be 216mm wide with a 6mm plastic spacer plate clipped
to the right-hand side, so as to use 210mm wide paper. Since it's a fixed
printhead in that machine (full width of the paper, 560 elements IIRC), I
guess either width works..
I've been wondering, how similar is the printer in the 9845 to the one
in the 2671 and to the optional ones used in the HP-150 and the ones used
in the old HP terminals?
[1] I haev just finished figuring out the PSU. It's quite the most
complicated one I have ever worked on. 2 main choppers (each with 2
transsitors in push-pull), 3 more switching regulators on the LV side, 5
chopper control ICs, overvoltage comparators on all outputs, Eeek. 17 ICs
on the contorl board (including the PIC6xx choppers), 16 transistors on
the main chopper board, and so on...
Eeck! Why does HP always over complicate their PSUs!
The Thinkjet is ok but it leaks and/or dries up
(Usually both!) if you
I have had a few 'normal' Thinkjets in for repair where leaking ink has
corroded and ruined the flexiprint cable that goes from the carriage (and
carries the contacts for the cartridge) to the main PCB. I have never
found a way of repairing this PCB.
On a 'normal' Thinkjet you can raid the part from any other Thinkjet, so
you can, say, use a fairly useless RS232 one to fix an HPIL one, useful
on the HP71, etc.
Yeap. I've been hoarding ThinkJets for that very reason. I used to order
the flex cables for the standard ThinkJets for something like $7 and they
would deliver them overnight via FedEx! I haven't ordered one in years and
I'm told that they're out of them now.
But although the Integral's Thinkjet is electrically
the same, the mechanical layout is different, and the
cables between the
PCB and the mechanism are longer -- including this flexible PCB.
Yeap, I've looked at both cables side by side and they're the same except
the IPC cable is about twice as long. I suppose that if you got desperate
for one for the IPC you could get a good one from a ThinkJet and cut it
apart and solder in an extension in the non-flexing area.
AFAIK
the only place to get one from is another Integral. Do
not leave ink
cartridges in the Integral's printer.
Don't leave cartridges in any ThinkJet printer that you don't use
EVERYDAY IMO!
Joe