Re: Wanted: HP Laserjet 4
A+ for all the input. If I can't get a low page count LJ 4 or a small stack of them (refurb one plus parts), a newer one, I.E. 8150DN is probably the answer. There is one on the place of all things, low page count. A drive, though. Too many items ruined by common carriers. I try to pick up anything of weight that has some intrinsic value.
Calling the cops on the real estate droid wouldn't do much. OTOH, calling the broker (her boss) sounds like a solution. He's going to lose the big commission.
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Re: Wanted: HP Laserjet 4
One thing you might look at while considering color printers: is it
telling on me?
Modern color printers put a pattern of yellow dots on the printed
page as mandated
by the government.?? These dots encode things like the printer
model, serial number,
and IP address.?? Older printers do not do this.?? Here is a list of
printers that do and
do not put these tracking dots on the page.
Pete.
On 7/12/2017 9:02 PM, Bob Albert
bob91343@... [hp_agilent_equipment] wrote:
toggle quoted message
Show quoted text
?
Norm,?
thanks for the insights on the printer.? I will keep it,
as it's my only duplex unit (not counting my daughter's
unit).? I may pick your brain regarding MRO supplies if
any are needed in the future.? I do weigh the cost of
the supplies against just using a single sided printer
and spending more on paper.? Or I may bite the bullet
and buy one of the newer color laser jobs for around
$200.
Bob
On
Wednesday, July 12, 2017 4:45 PM, "John Griessen
john@... [hp_agilent_equipment]"
wrote:
On 07/12/2017 03:56 PM, Dave
McGuire Mcguire@...
[hp_agilent_equipment] wrote:
> Personally, I use HP's older
enterprise-grade printers, like the
> 8150DN (mono) and 8550DN (color
I had an 8550dn for? a good while, but the
toners went up? up up in price so I figured
it was in obsolete mode.? Now I use a 4700n
color with good results.
I had a nice 5si, but the plastic frame doing
the engage and latch
of print drawers cracked on two of them and I
sent them to the crusher.
4050tn is OK, but not nearly as robust as the
5si, (until the plastic cracking death happened)
So sad.
--
John Griessen -- building lab gear for
biologists
Ecosensory? Austin TX? ecosensory.com
------------------------------------
Posted by: John Griessen < john@...>
------------------------------------
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Re: Wanted: HP Laserjet 4
Norm,? thanks for the insights on the printer.? I will keep it, as it's my only duplex unit (not counting my daughter's unit).? I may pick your brain regarding MRO supplies if any are needed in the future.? I do weigh the cost of the supplies against just using a single sided printer and spending more on paper.? Or I may bite the bullet and buy one of the newer color laser jobs for around $200.
Bob
On Wednesday, July 12, 2017 4:45 PM, "John Griessen john@... [hp_agilent_equipment]" On 07/12/2017 03:56 PM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote: > Personally, I use HP's older enterprise-grade printers, like the > 8150DN (mono) and 8550DN (color I had an 8550dn for? a good while, but the toners went up? up up in price so I figured it was in obsolete mode.? Now I use a 4700n color with good results. I had a nice 5si, but the plastic frame doing the engage and latch of print drawers cracked on two of them and I sent them to the crusher. 4050tn is OK, but not nearly as robust as the 5si, (until the plastic cracking death happened) So sad. -- John Griessen -- building lab gear for biologists Ecosensory? Austin TX? ecosensory.com ------------------------------------ Posted by: John Griessen < john@...>
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Re: HP 9000 300 & HP-HIL keyboard
Hi Paul,
Good to hear that my info on the connectors from Apr 5 was useful.
For further info, see pages 2-6, 2-7 of:
Apparently, there are some (minor?) differences between the original HP connectors vs. the AMP/TE in terms of color and strength of the keying ridges.?
I'm curious as to what you used to crimp the connectors.
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Re: Wanted: HP Laserjet 4
On 07/12/2017 03:56 PM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote: Personally, I use HP's older enterprise-grade printers, like the
8150DN (mono) and 8550DN (color I had an 8550dn for a good while, but the toners went up up up in price so I figured it was in obsolete mode. Now I use a 4700n color with good results. I had a nice 5si, but the plastic frame doing the engage and latch of print drawers cracked on two of them and I sent them to the crusher. 4050tn is OK, but not nearly as robust as the 5si, (until the plastic cracking death happened) So sad. -- John Griessen -- building lab gear for biologists Ecosensory Austin TX ecosensory.com
|
Re: Wanted: HP Laserjet 4
On 07/12/2017 03:20 PM, Norm n3ykf
normanlizeth@... [hp_agilent_equipment] wrote:
?
Title says it all. Reasonalbe page count, please. Must be
working.
Will pick up in the northeast.
Have jetdirect cards, so that is not necessary.
Norman J McSweyn
Would you accept a LaserJet 2200D with a JetDirect card, all in
working condition, including at least one--maybe two--HP96A
carrtidges?? I replaced this working printer because of
a network problem that was not its fault. It work s fine. On eastern
Long Island. I will not ship. Free for pickup with the extra HP
toner.
Reply to (dmcgarrett)? (at) (optonline) (.) (net)
|
Re: Replace Neon NE-2 with Zener in 141T PSU?
G'day Folks,
I cheated as I had removed the board several times before and didn't want that hassle
any more.
Snip the neon as close to the bulb envelope as possible and solder the zener(s) and resistor
to the left over wires. Keep the polarity of the zener in mind!
On both my units , that solution has been working for in excess of 5 years.
Cheers
Arie
VK3DBF
--------------------------------------------
|
Re: HP 9000 300 & HP-HIL keyboard
Hi All
?
A big thank you to the author of the
posting below
?
The two part numbers appear to be the
exact connectors for the HP-HIL keyboard
Please not the plug is not the same at
both Ends of the lead ?
?infect one has a letter A in the moulding?
and the other has a letter ?E in the moulding
?
and the ones ordered also have the letter A
?and letter E? and appear identical
cost less than? ? 5 each including free
delivery to the UK
for orders over? ?33
?
order placed? 12 o¡¯clock Sunday and arrived
today Wednesday? in the? UK
?only 3 days
?
Exultant service?? Paul B
?
From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 05 April 2017 16:45
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re:
HP 9000 300 & HP-HIL keyboard
?
?
The TE Connectivity AMP Connectors 1-1761184-1 and 5-1761184-1 seem to
match the HP-HIL cable connectors.
Where 1-1761184-1 has the "A" key for the One-Dot cable end
and 5-1761184-1 has the "E" key for the Two-Dot cable end.
These appear to be a stocked item at Digikey and likely similar:
Mouser, Arrow, etc.
Other manufacturer may be using the same SDL, Plug Modular Connector 4
Positions Position Shielded Crimp connectors for products other than HP-HIL.
I happened to have an IBM Point of Sale LCD Display that uses the
"A" keyed connector for it's receptacles/cables though it likely uses
RS-485 vs. HP-HIL. similar to:?
I tried the "A" (One-Dot) end of an HP-HIL in the receptacle
of the LCD display and it made good electrical contact and mechanically
latched. ?The IBM SDL cable that I have has "A" connectors on
both ends and it has a different pinout than the HP-HIL cable. ?Still,
similar IBM POS cables might be used for the "A" end of HP-HIL cable
or by remapping the the wiring and hacking the "A" key to fit in a
"E" receptacle.
I provide this to add to the discussion and possibly stimulate others
research/evaluation. ?I make no claims to suitability/accuracy/etc. I
don't represent any of the vendors. ?
I thought I had an HP-HIL keyboard that I might use to help develop a
"real" PS/2 to HP-HIL converter, but it was an HP PS/2 keyboard with
modular cables. ?Also, my plan use for my logic analyzer with HP-HIL is as
spare parts for a newer logic analyzer with PS/2. ?So, my converter plans
are suspended.?
No virus found in this message.
Checked by AVG -
Version: 2016.0.8012 / Virus Database: 4769/14245 - Release Date: 04/05/17
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141T reference replacement
Yes you can replace the ZZ1000 [equivalent] neon reference tube in the 141T power supply with a zener. Although this solves the fuse blowing problem, the temperature coeficient of voltage of the power supplies [plural - because this is the reference voltage for 4 supply rails] is degraded, because zener diodes have a high TC at these voltages.. In practice you might not be bothered by this. I did this with my 141T, and it`s still doing just fine. Hoping this is of interest......................................................................................................................Don Collie ZL4GX
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Re: Wanted: HP Laserjet 4
On 07/12/2017 05:45 PM, Andrew Hakman andrew.hakman@... [hp_agilent_equipment] wrote: I think these printers are all good because they use Cannon print
engines (aka, 90% of the printer) - hp basically put plastic cases on
them, and maybe wrote some of the firmware (but maybe not). The engines typically provide video and control interfaces...HP writes *all* of the firmware and designs the control board. This has been the case since the very first Canon CX engine, a.k.a. HP LaserJet Series I, a.k.a. Canon LBP-8. HP added the whole top of the printer. The LJ4, and the 4000 series (4000, 4050, 4100 etc) are basically just
new versions of the same printer with faster cpus in them, so they print
faster. Typically rock solid printers, and you can get them for ~$50,
with astonishingly low page counts if you know where to look. I know the
4200 has a notorious problem with some gears in the fuser - stay away
from those. The 11x17 multifunction office units of the same era as the
4200 seem to also have some issues - they sound like they're dying every
time it runs the engine, but yet they still print. I very much like the 4000 series printers as well. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Replace Neon NE-2 with Zener in 141T PSU?
I have not compared this supply but remember it was discussed some earlier time in the past few years. <<<
Old one - "neon tube" stabilized (pdf-page 35): 141T Display.pdf New one - zenerdiode stabilized (pdf-page 10..12): 141T_changes.pdf <<<
Hope it helps! Dennis -------------------------------------------- On Wed, 7/12/17, 'Alan Melia' Alan.Melia@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Subject: Re: [hp_agilent_equipment] Replace Neon NE-2 with Zener in 141T PSU? To: hp_agilent_equipment@... Date: Wednesday, July 12, 2017, 4:48 PM I have that circuit out in front of me trouble shooting that 100v supply on anothe system. My thought is that a 62v "zener" is not close enough to the 82v neon. You need another 20v?"zener" in series to make up the difference. R118 only has a swing of about 9v so not enough to make up for the lower voltage.?The 5.6k would deffinitely need increasing as the 62v?zener will be dissipating 400mW. Good luck taking that pcb out is not a job to be undertaken lightly!! ? Alan G3NYK ----- Original Message ----- From: w7qed@... [hp_agilent_equipment] To: hp_agilent_equipment@... Sent: Wednesday, July 12, 2017 8:12 PM Subject: [hp_agilent_equipment] Replace Neon NE-2 with Zener in 141T PSU? Hi All, I have recently acquired an HP-141T with the 8554B and 8552B plugins. Over the past month, the fuses in the plugins have blown three times. I've heard this can be an indication of an issue with the display section's PSU.? Looking at the schematic and the board I have, I appear to have the older revision which uses neon lamps as a voltage reference. The lamp in my PSU board is pretty black looking -- that may be normal, I don't know. At any rate, I wonder if I can replace the V1 neon with a 62 volt zener diode? Part number?2EZ62D5/TR8CT-ND from digikey, for example? I think any difference in the absolute level could be trimmed out using the +100V adjust pot. The biasing for the neon is a 5.6k resistor, I think that would work ok for the zener, but I could change it presumably.&n bsp; Thoughts?? Thanks, --E
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Re: Wanted: HP Laserjet 4
I think these printers are all good because they use Cannon print engines (aka, 90% of the printer) - hp basically put plastic cases on them, and maybe wrote some of the firmware (but maybe not).
The LJ4, and the 4000 series (4000, 4050, 4100 etc) are basically just new versions of the same printer with faster cpus in them, so they print faster. Typically rock solid printers, and you can get them for ~$50, with astonishingly low page counts if you know where to look. I know the 4200 has a notorious problem with some gears in the fuser - stay away from those. The 11x17 multifunction office units of the same era as the 4200 seem to also have some issues - they sound like they're dying every time it runs the engine, but yet they still print.
Anyone happen to know where to get (or have) a reasonably priced transfer unit for a CLJ 5500?
?
I'd get a 4050 or 4100. These printers are REAL workhorses, has parallel
port, network port, lots of memory, duplex option, cartridge for 15000
prints, can use 2/3 paper drawers and the whole works. I have some here and
just can't let it go. Usually locks up a solenoid on paper pickup assembly,
but after fix (I have a video on youtube with hundreds of thousands of views
describing the repair but in portuguese) it wil work **forever**. I do love
this printer <3
---
----- Original Message -----
From: "Norm n3ykf normanlizeth@... [hp_agilent_equipment]"
<hp_agilent_equipment@yahoogroups.com>
To: <hp_agilent_equipment@yahoogroups.com>
Sent: Wednesday, July 12, 2017 5:20 PM
Subject: [hp_agilent_equipment] Wanted: HP Laserjet 4
Title says it all. Reasonalbe page count, please. Must be working.
Will pick up in the northeast.
Have jetdirect cards, so that is not necessary.
Norman J McSweyn
---
Este e-mail foi verificado quanto a v??rus pelo AVG.
|
Re: Replace Neon NE-2 with Zener in 141T PSU?
Hello Gang,
First of all, I am not sponsored. But for such small orders, one or two parts and shit, use Arrow. Free shipping on literally everything.even to Slovakia. Just beware of customs...
Tam
--
With best regards
Tam Hanna
---
NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please
subscribe to my new YouTube channel ->
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Show quoted text
On July 12, 2017 11:13:00 PM CEST, "w7qed@... [hp_agilent_equipment]" wrote:
?
Hi Gary, Denis, Ed, and Alan,
You are all correct, I read the value wrong. My printed schematic looks poor on paper!
Ok, so an 82 volt zener (or equivalent) would do the trick.?
Yes, that "bulb" does look rather large, perhaps an inch long or so.?
I will order a few from digikey next time I place an order.?
Thanks all,
--E
|
Re: Replace Neon NE-2 with Zener in 141T PSU?
Here's an example:
If you make a replacement circuit that provides the same or close enough shunt regulator specs, it should drop in OK? without changing anything else. I think you can perform the surgery all from the component side without removing the PS board.
One nice thing about using a modern reference circuit is that the voltage won't overshoot. I'm convinced that many 141 failures were caused by temporary over-voltage while the gas tube had to reach striking voltage - significantly higher than running voltage.
Ed
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Re: Wanted: HP Laserjet 4
I'd get a 4050 or 4100. These printers are REAL workhorses, has parallel port, network port, lots of memory, duplex option, cartridge for 15000 prints, can use 2/3 paper drawers and the whole works. I have some here and just can't let it go. Usually locks up a solenoid on paper pickup assembly, but after fix (I have a video on youtube with hundreds of thousands of views describing the repair but in portuguese) it wil work **forever**. I do love this printer <3
---
toggle quoted message
Show quoted text
----- Original Message -----
From: "Norm n3ykf normanlizeth@... [hp_agilent_equipment]" <hp_agilent_equipment@...>
To: <hp_agilent_equipment@...>
Sent: Wednesday, July 12, 2017 5:20 PM
Subject: [hp_agilent_equipment] Wanted: HP Laserjet 4
Title says it all. Reasonalbe page count, please. Must be working.
Will pick up in the northeast.
Have jetdirect cards, so that is not necessary.
Norman J McSweyn
---
Este e-mail foi verificado quanto a v??rus pelo AVG.
|
Re: Wanted: HP Laserjet 4
The rated monthly page duty cycle of the 8100 series is higher than
the total life expectancy of many consumer-grade printers. I LOLed :D
|
Re: Wanted: HP Laserjet 4
On 07/12/2017 05:08 PM, Norm n3ykf normanlizeth@... [hp_agilent_equipment] wrote: I'll keep your suggestions in mind. Some pieces of gear were made better
and because of it, lasted longer. Looking for exactly what you're
describing. Yes. I love my big non-cheap-consumer-crap printers. We put them through far less abuse here than most big companies (but far more than most individuals) and they don't even break a sweat. Only reason I'm staying with the legacy product is I still have one (in
the moving truck, stored) and plenty of toner and parts. That's a good situation to be in. :-) Real estate droid (listing agent) stole mine at the old house. Can you
say "cancel my contract"? Wow...! Sounds more to me like "call the cops!" Missed a free 8150N. Oh, that sucks. :-( -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: Replace Neon NE-2 with Zener in 141T PSU?
Hi Gary, Denis, Ed, and Alan,
You are all correct, I read the value wrong. My printed schematic looks poor on paper!
Ok, so an 82 volt zener (or equivalent) would do the trick.?
Yes, that "bulb" does look rather large, perhaps an inch long or so.?
I will order a few from digikey next time I place an order.?
Thanks all,
--E
|
Re: Wanted: HP Laserjet 4
Dave,
I'll keep your suggestions in mind. Some pieces of gear were made better and because of it, lasted longer. Looking for exactly what you're describing. Only reason I'm staying with the legacy product is I still have one (in the moving truck, stored) and plenty of toner and parts.
Real estate droid (listing agent) stole mine at the old house. Can you say "cancel my contract"?
Missed a free 8150N.
Thanks, Norm n3ykf
?
On 07/12/2017 04:45 PM, Norm n3ykf normanlizeth@...
[hp_agilent_equipment] wrote:
> HP used to make awesome printers. Now? Just plastic junk. Send a wally
> world special 100 pages? It croaks.
Their non-consumer printers are still top notch, but if you're not
prepared to drop $4,000 on one, forget it.
Personally, I use HP's older enterprise-grade printers, like the
8150DN (mono) and 8550DN (color). They are indestructible,
maintainable, and trivial to get supplies for. And 11x17 support,
duplexing, and 32 pages per minute is really, really nice.
The rated monthly page duty cycle of the 8100 series is higher than
the total life expectancy of many consumer-grade printers.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Replace Neon NE-2 with Zener in 141T PSU?
I have two 141¡¯s. One with the infamous VR tube, which consistently blows
fuses on the IF¡¯s, and one with a more recent power supply. I¡¯ve not used the
older unit in years, but I have purchased a zener, in case I ever get back to
that unit.
?
The zener came from digikey - 1N5375BGOS-ND
?
It¡¯s an 82 volt, 5W zener.
?
Gary Appel
toggle quoted message
Show quoted text
Sent: Wednesday, July 12, 2017 9:12 AM
Subject: [hp_agilent_equipment] Replace Neon NE-2 with Zener in 141T
PSU?
?
?
Hi All,
I have recently acquired an HP-141T with the 8554B and 8552B plugins.
Over the past month, the fuses in the plugins have blown three times. I've heard
this can be an indication of an issue with the display section's PSU.
Looking at the schematic and the board I have, I appear to have the
older revision which uses neon lamps as a voltage reference. The lamp in my PSU
board is pretty black looking -- that may be normal, I don't know.
At any rate, I wonder if I can replace the V1 neon with a 62 volt zener
diode? Part number 2EZ62D5/TR8CT-ND
from digikey, for example? I think any difference in the absolute level could be
trimmed out using the +100V adjust pot. The biasing for the neon is a 5.6k
resistor, I think that would work ok for the zener, but I could change it
presumably.
Thoughts?
Thanks,
--E
?
|
Paul Bicknell
Dave McGuire
Alexandre Souza