HP500 Designjet defies repair

[Guest]

Svc call on an HP DJ500 plotter with a broken/shredded belt. Order belt, replace meticulously per HP repair manual. Power up, get a 21:10 error. Reinspect work, order and replace service station (brand new HP OEM). Still 21:10, upgrade firmware to A.04.02 (the latest) successfully. Still 21:10. Go into service mode & read error log. From top to bottom:

21:10 (service station)
79:04 (firmware error)
21:10 (ss 1st report of)
86:01 (carriage movement)
62:03 (I/O thru parallel port) ??
79:04 (f/w error)
86:01 (carriage movement, tied to belt shred?)
79:04 (f/w error)

On normal powerup, menu button displays severe error 0x3010002 task: tmech line 796

Did I somehow introduce the 21:10 error? Should I disassemble the ss and right carriage end to see if I missed something?

Did I get a bad service station replacement?

Anybody?

Thanks.

[fixthecopier]

I can not think of anything you would have touched that would cause that error from just changing a belt. I would doubt that you got a bad service station. Revisit the plugs on the main board and reseat them, check the fuse on the board, if it has one.

[Simons]

If you call HP support they will tell you that belt changes in this POS can crap out values stored on the motherboard. Only fix is to REPLACE THE MOTHERBOARD. YES you better believe it. Been there and done that. Never again. Refer to factory trained designjet person next time. Not worth the trouble!

[JustManuals]

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Paul@justmanuals.com

[cheapcookies]

If you call HP support they will tell you that belt changes in this POS can crap out values stored on the motherboard. Only fix is to REPLACE THE MOTHERBOARD

What values get crapped out, is there a way to clear or reset them, and will clearing the EEROM do anything for me?

If I do buy a new motherboard (what did you pay?), is there a procedure to setting it up with values, etc?

Thanks,

-cc

[fixthecopier]

HP has a user friendly forum with a lot of old time plotter techs. Try to go there and ask.

[jeff33]

Remove the right cover turn the SS gears to release the carriage move the carriage near the other end. Turn on the plotter. The service station should find its home position. If it don't move, I would check to see that you didn't put it in on a bind check all the wiring replace the power supply. I have replaced a lot of belts and have never taken out a Emod, so I wouldn't worry about that. Most of the time these plotters are an ease fix, and yes I am a HP certified Tech

[cheapcookies]

Remove the right cover turn the SS gears to release the carriage move the carriage near the other end. Turn on the plotter. The service station should find its home position. If it don't move, I would check to see that you didn't put it in on a bind check all the wiring replace the power supply

I revisited this plotter this am. Cleaned the encoder strip, checked all wiring (appears normal). Took the old SS and held it in my hand (not attached to plotter except with wiring) rolled the gears to move the pads out and plugged it in. The SS makes a short motor noise but does NOT retract the pads to home. Tried same with the other SS, same deal: It does NOT return home. Short motor noise.

What did you mean by the power supply?

Should I disassemble it to the point where I was before when I replaced the belt?

[fixthecopier]

If it did not do it before you worked on it, take it back down to where you started and do it again. Sometimes you see something you missed. Power supply will be close to where the plug in is.

[cheapcookies]

Power supply will be close to where the plug in is

What I meant was, why do you suspect the PS as being bad?

-cc

[fixthecopier]

jeff33 will have to respond to that, I have only replaced 1 power supply on a plotter and it was dead. I have learned from experience that if it did not do it before I touched it, go back and check it all again. I really think you should check out the HP forum for plotters. I have got some good help there.