mbeck@ai.mit.edu (Mark Becker) (10/09/90)
Hello. I don't quite believe my luck.. or non-luck. I've been given an HP LaserJet II. And, no, it doesn't work. (The giver wanted an LJ-III and didn't want to bother having the LJ-II repaired). I can turn the unit on.. Can hear the motors move. The front panel lights go on normally and the display says "05 SELF TEST". It gets through that okay.. then the display says, "02 WARMING UP". And it sits there, "WARMING UP". Never seems to come out of it. The room lights on that line dim occasionally from a high current draw. They return to full brightness after a second or two.. which makes me think the printer electronics are protecting something. I turn the machine off, stick my hand in there, and the fuser area is dead cold. The front panel lights do not re-light. The best I've done is measure continuity through the fuser heating element (using an ohmmeter).. but beyond that, I'm stuck. I have no ideas where to peer next inside this beast. Before I telephone HP Service (ouch), can anyone suggest a possible course of action? Possibly something simple died that I can easily fix? Maybe a blown fuse in the power supply going to the thermal regulator on the fuser? Suggestions for other tests would be appreciated. It would be nice to get it running... Regards, Mark mbeck@ai.mit.edu
wolfgang@wsrcc.uucp (Wolfgang S. Rupprecht) (10/11/90)
mbeck@ai.mit.edu (Mark Becker) writes: >I've been given an HP LaserJet II. And, no, it doesn't work. >I can turn the unit on.. Can hear the motors move. The front panel >lights go on normally and the display says "05 SELF TEST". It gets >through that okay.. then the display says, "02 WARMING UP". >And it sits there, "WARMING UP". Never seems to come out of it. The >room lights on that line dim occasionally from a high current draw. ^^^^^^^^^^^^^^^^^^ >They return to full brightness after a second or two.. which makes me >think the printer electronics are protecting something. >I turn the machine off, stick my hand in there, and the fuser area is >dead cold. The last sentence says it all. Just leave the "cold" off. The fuser sounds fused. ;-) Measure the DC resistance. Also check the resistance of the heater connections to the fuser/LJ-II case. Now call HP and find out what the correct values for both should be. HP might also sell the service manuals. Probably a nice thing to have. -wolfgang -- Wolfgang Rupprecht uunet!{nancy,usaos,media!ka3ovk}!wsrcc!wolfgang Snail Mail Address: Box 6524, Alexandria, VA 22306-0524
henry@zoo.toronto.edu (Henry Spencer) (10/12/90)
In article <1990Oct11.152443.3345@wsrcc.uucp> wolfgang@wsrcc.uucp (Wolfgang S. Rupprecht) writes: >... Measure the DC resistance. Also check the >resistance of the heater connections to the fuser/LJ-II case. Now >call HP and find out what the correct values for both should be. HP >might also sell the service manuals. Probably a nice thing to have. Unfortunately, the service manuals for the LJ2 are a great step down from the ones for the original LJ series. The LJ2 manual is a guide to replacing whole subassemblies, rather than detailed down-in-the-wires troubleshooting information. HP will probably just quote a price on replacing the entire fusing assembly, several hundred bucks worth. -- "...the i860 is a wonderful source | Henry Spencer at U of Toronto Zoology of thesis topics." --Preston Briggs | henry@zoo.toronto.edu utzoo!henry
scotta@hpcuhd.HP.COM (Scott Anderson) (10/13/90)
> Now > call HP and find out what the correct values for both should be. HP > might also sell the service manuals. According to my old 8/88 Version of the Documentation Index, here's some numbers for you... HP Part Number Description Price 33440-90904 HP 33440A Laser Printer Service Manual $49.00 33440-90906 HP 33440A Laserjet Series II Printer CE Hnbk $8.50 These can be ordered through HP's Direct Marketing (800-538-8787). I believe you can also get a copy of the Documentation Index from them. Scott Anderson An RTEsian and proud of it... Hewlett-Packard Data Systems Operation scotta@cup.hp.com 11000 Wolfe Rd. MS 42UN 408-447-5219 Cupertino, CA 95014
amichiel@rodan.acs.syr.edu (Allen J Michielsen) (10/13/90)
In article <1990Oct12.152921.12345@zoo.toronto.edu> henry@zoo.toronto.edu (Henr >In article <1990Oct11.152443.3345@wsrcc.uucp> wolfgang@wsrcc.uucp (Wolfgang S. >>... Measure the DC resistance. Also check the >>resistance of the heater connections to the fuser/LJ-II case. > >...the service manuals for the LJ2 are a great step down from the ones for >the original LJ series. The LJ2 manual is a guide to...{parts swapping}.... If you have a set for the original LJ, what are the numbers in question ? I would doubt if they would change by a factor 10 or more which would probably be needed to dim the room lights. al -- Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University InterNet: amichiel@rodan.acs.syr.edu amichiel@sunrise.acs.syr.edu Bitnet: AMICHIEL@SUNRISE
scotta@hpcuhd.HP.COM (Scott Anderson) (10/16/90)
> If you have a set for the original LJ, what are the numbers in question ?
02686-90913 2686A C.E. Handbook $5.00
02686-90920 2686A/D Laserjet Service Manual $29.00
Ah, it's so nice to have such an important role in these discussions. :-)
Scott Anderson
An RTEsian and proud of it... Hewlett-Packard
Data Systems Operation
scotta@cup.hp.com 11000 Wolfe Rd. MS 42UN
408-447-5219 Cupertino, CA 95014henry@zoo.toronto.edu (Henry Spencer) (10/16/90)
In article <1990Oct13.142200.4154@rodan.acs.syr.edu> amichiel@rodan.acs.syr.edu (Allen J Michielsen) writes: >If you have a set for the original LJ, what are the numbers in question ? LJ1 troubleshooting procedures say that heater bulb resistance ought to be 1-5 ohms cold (if I'm reading the Japlish correctly). -- "...the i860 is a wonderful source | Henry Spencer at U of Toronto Zoology of thesis topics." --Preston Briggs | henry@zoo.toronto.edu utzoo!henry