Digest for sci.electronics.repair@googlegroups.com - 23 updates in 2 topics

Adrian Caspersz <email@here.invalid>: Jun 25 05:54PM +0100

On 25/06/16 17:28, Emran M. wrote:
> https://www.tradebit.com/usr/manuals4u/pub/9002/118383850_HPLaserJet32003200Mservman01.jpg
 
> The manual is 10 dollars
> https://www.tradebit.com/filedetail.php/118383850-hp-laserjet-3200-3200m-series-service-repair
 
 
https://archive.org/details/printermanual-hp-laserjet-3200-service-manual
 
 
--
Adrian C
Jeff Liebermann <jeffl@cruzio.com>: Jun 25 10:03AM -0700

On Sat, 25 Jun 2016 16:28:32 -0000 (UTC), "Emran M."
 
>That enigma should give me a clue as to what the cause is, but
>I can't think of anything that goes horizontally.
 
Hmmm... 15 year old printer. Is it dirty inside?
 
If it's a thin black line, such streaks are usually caused by the
laser scanner or formatter electronics. Some dust on the rotating
mirror might do the trick (not sure). However, that doesn't quite
match your vague description.
 
The various rollers will leave their footprints, but not as a
continuous line across the page. However, if it's a broad smear, it
can easily be a burnt toner cartridge that was left in the sun, which
then burned the drum. A scorched fuser roller will do much the same
thing. Please heed the advice of others to measure the distance
between the horizontal lines, divide the distance by 2*Pi, which
should yield the diameter of the offending roller.
 
If you want to continue this, I suggest you take a photo of an
offending page, post it to a public photo site, so we can look at it.
Otherwise, make an effort to be more specific than "horizontal
streaks".
 
>The manual is 10 dollars
>https://www.tradebit.com/filedetail.php/118383850-hp-laserjet-3200-3200m-series-service-repair
 
Free service manual:
<http://www.lbrty.com/tech/Manuals_HP/3200sm.pdf>
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
N_Cook <diverse@tcp.co.uk>: Jun 25 06:07PM +0100

On 25/06/2016 17:17, Emran M. wrote:
> means the rollers must be vertical.
 
> Yet, the streaks are horizontal (in the opposite direction
> in which the paper physically moves down through the scanner).
 
In that case the corona wire needs cleaning
Jeff Liebermann <jeffl@cruzio.com>: Jun 25 11:52AM -0700

On Sat, 25 Jun 2016 10:03:32 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:
 
>...measure the distance
>between the horizontal lines, divide the distance by 2*Pi, which
>should yield the diameter of the offending roller.
 
No brain today. Too hot. That should be divide the distance between
the lines by Pi to get the roller diameter.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
"Emran M." <emramm@emramm.com>: Jun 25 08:06PM

On Sat, 25 Jun 2016 10:03:32 -0700, Jeff Liebermann wrote:
 
>>https://www.tradebit.com/filedetail.php/118383850-hp-laserjet-3200-3200m-series-service-repair
 
> Free service manual:
> <http://www.lbrty.com/tech/Manuals_HP/3200sm.pdf>
 
It's not dirty inside as far as I know what to look for.
In fact, it's pretty clean.
 
Here is a scan of a photo that was put in the slot long-side horizontal.
So the scan was vertical. http://i.cubeupload.com/dmSy3Y.jpg
 
Notice that the scan was from the top to the bottom of this picture
(from head to toe) but the "scratch" lines are from side to side (which
is not the direction that the paper moved).
 
There isn't any moving object side to side, is there?
 
(The horizontal scratches are not in the original photo!)
c4urs11 <c4urs11@domain.hidden>: Jun 25 08:51PM

On Sat, 25 Jun 2016 14:44:36 +0000, Emran M. wrote:
 
> How do I get rid of horizontal streaks HP LaserJet 3200m
> copies and scans?
 
Just curious: is the aspect the same whatever scan quality you select?
Scanning speed often changes with resolution.
 
Cheers!
Wade Garrett <wade@cooler.net>: Jun 25 05:08PM -0400

On 6/25/16 10:55 AM, Oren wrote:
 
>> What is the cause and solution for these horizontal streaks?
 
> Does the printer menu have an option to clean and calibrate the print
> heads? I'd try there, first.
 
I don't believe laser printers have print heads.
 
--
A man's rights rest in three boxes: the ballot box, the jury box, and
the cartridge box.
- Frederick Douglas (via @RealJamesWoods)
Tony <lizandtony at orcon dot net dot nz>: Jun 25 04:20PM -0500

>|xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx|
>______________________________________
 
>What is the cause and solution for these horizontal streaks?
For clarification
You are saying this only happens when you are scanning or copying? And
presumably does not happen when you are printing from a computer.
If that is right then this is not a problem with the printung mechanism which
contains several rollers, but it is a problem with the scanning mechanism (and
any rollers in that mechanism are very unlikely to cause this sort of issue).
There is only one thing that you can do and that is locate the scanning glass
and clean it very carefully, an extremely tiny dot of some contaminant (white
out or similar) will cause long sstreaks on the scanner output. If that does
not fix it then it looks like an electronic problem to me and that is probably
not worth trying to repair. The glass is behind the feed cover. I see someone
has directed you to the manual, it will explain how to get at the glass. Window
cleaner will do the trick.
Tony
Tony <lizandtony at orcon dot net dot nz>: Jun 25 05:12PM -0500

Tony <lizandtony at orcon dot net dot nz> wrote:
>has directed you to the manual, it will explain how to get at the glass.
>Window
>cleaner will do the trick.
 
I just read the rest of this thread, and saw the scan you posted. If that is
exactly what the scanner is producing then I have never seen anything like that
and it is not caused by contamination on the scanner glass (because you say the
lines are not in the direction of paper movement in the scanner). It actually
looks like a scan of a photo printed by an inkjet printer that needs the heads
cleaning but I am sure you sent the output of the scanner without any further
processing didn't you?
Tony
clare@snyder.on.ca: Jun 25 10:42PM -0400

On Sat, 25 Jun 2016 17:08:00 -0400, Wade Garrett <wade@cooler.net>
wrote:
 
 
>> Does the printer menu have an option to clean and calibrate the print
>> heads? I'd try there, first.
 
>I don't believe laser printers have print heads.
 
 
Do you get the same streak when you use it as a printer instead of a
copier? If so it is a print engine problem. If not it is a scan engine
problem. Almost 100% of scanning problems that produce a line the
length of the scanned document are caused by a little spot of dirt on
the scanning element - it looks like a class bar across the paper path
- check for a spec of dirt - possibly white-out on the class. Tou
might not be able to see it but you should be able to feel it -
scratch it off and the line will dissappear.
clare@snyder.on.ca: Jun 25 10:45PM -0400

On Sat, 25 Jun 2016 16:20:35 -0500, Tony <lizandtony at orcon dot net
dot nz> wrote:
 
>has directed you to the manual, it will explain how to get at the glass. Window
>cleaner will do the trick.
>Tony
If it happens when printing as well as copying you have a drum
problem Just replace the drum (the space between the lines will be the
circumference of the drum)
"Tony944" <tony@seput.com>: Jun 25 08:15PM -0700

"Tony" wrote in message news:part1of1.1.9hXNAaCDUtmAXg@ue.ph...
 
Tony <lizandtony at orcon dot net dot nz> wrote:
>has directed you to the manual, it will explain how to get at the glass.
>Window
>cleaner will do the trick.
 
I just read the rest of this thread, and saw the scan you posted. If that is
exactly what the scanner is producing then I have never seen anything like
that
and it is not caused by contamination on the scanner glass (because you say
the
lines are not in the direction of paper movement in the scanner). It
actually
looks like a scan of a photo printed by an inkjet printer that needs the
heads
cleaning but I am sure you sent the output of the scanner without any
further
processing didn't you?
Tony
Solution simple buy new one
Tony <lizandtony at orcon dot net dot nz>: Jun 25 10:23PM -0500

> If it happens when printing as well as copying you have a drum
>problem Just replace the drum (the space between the lines will be the
>circumference of the drum)
If it is a printer issue (not the scanning engine) then it MAY be a drum
problem but it may also be fuser or one of two other possible rollers.
Tony
Jeff Liebermann <jeffl@cruzio.com>: Jun 25 08:24PM -0700

On Sat, 25 Jun 2016 20:06:46 -0000 (UTC), "Emran M."
 
>It's not dirty inside as far as I know what to look for.
>In fact, it's pretty clean.
 
Hit the inside of the machine with some compressed air. Ummm...
remove the toner cartridge first. You'll be amazed at what can blow
out of insides. Also, turn it upside down to remove staples and paper
clips.
 
>Here is a scan of a photo that was put in the slot long-side horizontal.
>So the scan was vertical. http://i.cubeupload.com/dmSy3Y.jpg
 
I think that means that your landscape photo moved through the
mechanism lengthwise, or from left to right. Is that correct? I'm
not sure because the landscape photo shows white lines perpendicular
to the stylized lines shown in your original posting. Perhaps it
might be better if you abandon the landscape scan and switch to a more
consistent portrait scan? Extra credit for annotating the JPG to
highlight the problem.
 
>is not the direction that the paper moved).
 
>There isn't any moving object side to side, is there?
 
>(The horizontal scratches are not in the original photo!)
 
I thought it was the horizontal white scratches that you wanted to
eliminated. I don't see any scratches perpendicular to the white
scratches.
 
However, if it is the white scratches that are the problem, the answer
is obvious. You have some dirt, white out, toner, or label glue stuck
to the document scanner window. In the service manual:
 
Go thee unto Pg 226. That's the document scanner assembly on the
front lid (behind the keyboard). The should be a narrow glass window
in the document scanner somewhere. It's usually about 1/4" x 8.5" and
runs along the width of the page. I can't find it in the various
exploded views, but it has to be there. My guess(tm) is that it's
covered with speckles of dirt, crud, dust, white-out, glue, etc. Clean
it and the white streaks should disappear on the scans. Just follow
the paper path during scanning. It should be somewhere along the
path.
 
Another possible cause is that you have light leaking into the
document scanner assembly causing the white streaks. I can't tell
from here where it might be leaking in. Try a scan with the room
lights turned off, or with a cardboard box over the 3200m, and see if
the streaks disappear.
 
Good luck.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Jeff Liebermann <jeffl@cruzio.com>: Jun 25 08:34PM -0700

On Sat, 25 Jun 2016 20:24:27 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:
(...)
 
More:
 
You might want to try calibrating the document scanner:
<http://manualmachine.com/hp/laserjet-3200-all-in-one/195531-service-manual/page:20/>
<http://manualmachine.com/hp/laserjet-3200-all-in-one/195531-service-manual/page:21/>
 
In the document scanner calibration, it proclaims:
 
2 Before recalibrating the document scanner, open the
document scanner and place a page that contains the
black or white lines between the guides, just above
the contact image sensor glass. The black or white
line points to a portion of the glass that requires
extra attention.
 
3 Clean the contact image sensor glass at the point
indicated by the black or white line.
 
6 If the vertical black or white line appears on the
copy of the demonstration page, continue with steps 7
through 13 below.
 
13 Line up the calibration graph with a newly copied
page. If the dip in the calibration graph corresponds
to the black or white line, the contaminant is likely
internal and the contact image sensor assembly should
be replaced.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Micky <NONONObobbyburns1111@gmail.com>: Jun 25 11:38PM -0400

On Sat, 25 Jun 2016 16:16:02 -0000 (UTC), "Emran M."
>> diameter, so their tell marks are different spacings apart.)
 
>But the streaks are horizontal, while the rollers must (by nature)
>be vertical???
 
I thought you put the 11" side first and notebook-sized paper moved 8
1/2 inches. So the rollers would be parallel to the 11" side.
 
I've read all your posts and they all seem to say that, except for
your conclusion that the rollers are vertical. I don't like either
horiz or vert, I don't know what they mean, but I do like parallel or
perpendicult to 11" side.
 
Does your owners manual have a troubleshooting section?
Tony <lizandtony at orcon dot net dot nz>: Jun 25 10:45PM -0500

>horiz or vert, I don't know what they mean, but I do like parallel or
>perpendicult to 11" side.
 
>Does your owners manual have a troubleshooting section?
It is an A4, Letter and limited banner printer. that means that the short edge
(8 1/2") of a sheet enters the printer so that edge is parallel to the rollwers
in the printer.
Tony
clare@snyder.on.ca: Jun 26 12:03AM -0400

On Sat, 25 Jun 2016 22:45:51 -0500, Tony <lizandtony at orcon dot net
dot nz> wrote:
 
>(8 1/2") of a sheet enters the printer so that edge is parallel to the rollwers
>in the printer.
>Tony
Replace the cartridge/drum Assembly. From your clarification of terms
you have a defective or damaged image drum. I've seen likely a hundred
of them with that kind of problem (unable to see your image, but your
keyboard art tells the story)
Tony <lizandtony at orcon dot net dot nz>: Jun 25 11:09PM -0500

>you have a defective or damaged image drum. I've seen likely a hundred
>of them with that kind of problem (unable to see your image, but your
>keyboard art tells the story)
His first post tells us that it only when scanning or copying, later posts
indicate (nearly but slightly unclearly) that it does not happen when printing
from a computer. That makes it a scanner engine problem, and rollers don't
cause scanner quality issues (only feed isues).
Tony
clare@snyder.on.ca: Jun 26 08:50AM -0400

On Sat, 25 Jun 2016 23:09:21 -0500, Tony <lizandtony at orcon dot net
dot nz> wrote:
 
>from a computer. That makes it a scanner engine problem, and rollers don't
>cause scanner quality issues (only feed isues).
>Tony
And scanner problems will only cause streaks in the direction of
paper flow in a sheet feed scanner - and then usually due to dirt on
the glass rod.
 
I believe I am the only poster who gave instructions based on
determining first if it is a printer or scanner issue.
Oren <Oren@127.0.0.1>: Jun 26 06:07AM -0700

On Sat, 25 Jun 2016 17:08:00 -0400, Wade Garrett <wade@cooler.net>
wrote:
 
 
>I don't believe laser printers have print heads.
 
Good catch :-)
jurb6006@gmail.com: Jun 25 09:14PM -0700

>regulators that were usually located INSIDE the alternator housing. >I
>did have some kind of alternator that I installed in 1960 Ford Falcon
>that had an external solid state regulator. "
 
You are mistaken. I come from a car family and know. There were many with the mechanical regulators that had alternators. In fact one of the tests for the regulator was to short the field wire to the battery wire and watch the voltage. (on a VOM !) or you could hear the whine of it. One guy we knew just took a piece of metal and saw if it stuck to the back of the alternator where the shaft was because the way the energized the field caused magnetism there. He troubleshot it between alternator and regulator right then, if it had a field and the alternator was not charging it was the alternator. If it did not have a magnetic field then usually the regulator was bad, or a fusible link somewhere or some shit like that.
 
It was in the 1980s that internal regulators came out, and I didn'5 like them. I liked taking off the cover and loosening the spring to give a hotter charge. I had a 1970 Olds Toronado that took massive current to start because of the settings ad the compression ratio. I had two batteries in it. That is also the car I had the 30 WPC RMS amp into 8 ohms in it. We used to go to the park and we got tired of walking before we could not hear it anymore.
 
You know, an alternator uses a separate set of top diodes in the three phase bridge to regulate. They do not WANT to perfectly regulate the voltage. Even the old externally regulated ones were like that. They wanted the current charging the battery slightly soft.
 
I am from a car family and like Scotty on Star Trek I now more about them than the people who built them. In the old days when you used to put water in your car battery, the voltage may have been like 13.8 with no load. Now, the fucking fuel injectors and everything pull nearly what the starter does. Seriously, I had a car alternator fail and went and got one and did not need a jump start. Fuel injectors pull over an amp apiece and there is usually one of them per cylinder. The computers and all this other shit in them is really starting to pull some juice. I replaced an alternator because my Buick stopped running and I did not need a jump to start. Think about that.
 
Another thing I wll tell you is that if you have an automatic transmission, do not change the fluid. Of course change the filter and then pour the old fluid back in, but you'll prbably have to add a little. Reason ? Chemistry. The seals on your clutches n shit in there have exuded some of their components into the fluid. This reduces the rate at which this happens. You put new fluid in there you are just dissolving the seals.
 
You know, the kit to rebuild a tranny is not that expensive. But then you have to take the thing out ad take it all apart and it is on your kitchen table for two months and your olady leaves you and all this shit. So just don't change the fucking tranny fluid.
 
There are a few other things I can tell you about cars, like rear suspension and how to optimize it. My cousin had a modified car and literally ripped the from bolts out of the front seat.
 
I was an Olds 442, I mean the old ones where "4" meant four speed, they were NOT available with an automatic. But he turned it into a 642, with Edelbrock and three Holleys under the hood. And he got the thing to run do good that he could idle in third gear and then punch it and it wouldn't miss a lick. Any other car would have backfired and stalled, but his just took off.
 
HAHA, the kid (Dom, bore of gangsters) wants me to design variable vale timing for a Ford 460. If this shit happens I need a shit ton of money. I need the engine right in front of me in my garage to measure and figure it out, and now that I have sold both of my lathes I need to job some of the machining out. But then it is probably all talk. Variable valve timing is NOT easy to implement. Even if you get the mechanism ready you have to figure out the curves n shit, and that is math. Ugh. But if he ever comes up with the money and pays me I will take a crack at it.
 
Funny, I mentioned all this to him a few months ago after he smashed his Ford truck. We were talking about "Where do you go from here ?". Then his Father, who is pretty much rich, bought a new truck for the business that has variable valve timing and direct cylinder injection. And we were talking about direct injection, I told hi you have to get injectors like for a diesel, drill a brand new hole in the heads and hope you got the room to do it. And its placement really does matter, you can't just put it anywhere.
 
Engineering is a cool thing and I like doing it when I can, meaning within my abilities. But people in general, laymen I guess is the word, just do not understand that it is not that easy.
 
I know alot of people here understand all that, but remember that there are people out there who can't even hook up a fucking stereo. But most don't care. Go to work, play with the kids and fuck your olady. That is all that is on their minds. Not care about politics or justice and injustice. Just into their own life.
jurb6006@gmail.com: Jun 25 09:16PM -0700

Damn.
 
Sorry I went into that rant, I pretty much forgot the subject..
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