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    Re: Howtek 4500 info

    thanks so much! Happy this valuable resource is still available. I'm a perfect example, hardly ever need it, but when I do, can't live without it!
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    Howtek 4500 info

    Hi, haven't posted here in years. Getting my old 4500 up and running again, looking for a service manual. It used to be posted at the High End Scanner Yahoo group, which apparently is no loner...
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    Re: streaks in Imacon scans

    thank you both, I've passed the info on and we'll see where it goes. They did inform him they no longer service that model.
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    streaks in Imacon scans

    I have a friend with a Flextight Precision ll, he has intermittent subtle streaks, much like something I might get with a bad bulb in my drum scanner, or a dirty calibration area in a flatbed. Any...
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    Re: ongoing Howtek 4500 issues

    sorry the history of this attempted repair is long and in too many posts... I have about 1/2 dozen good bulbs I constantly switch out, I'm sure that's not the problems.. also, 702 errors tend to be...
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    Re: ongoing Howtek 4500 issues

    sorry for the delay, I appreciate your interest. I was waiting for a new scsi cable to arrive to eliminate that from the variables, seemed to get lost in transit for about 3 weeks...
    Here is the...
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    Re: ongoing Howtek 4500 issues

    I'll try anything, thanks for your suggestion, unfortunately did not work here.
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    ongoing Howtek 4500 issues

    I have some consistent behavior to report now. It seems anything that initiates drum rotation results in the same problem. The drum moves over from rest position about 6" and begins spinning. It then...
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    Re: DPL users/owners of Howtek/Aztek scanners

    does anyone have a copy of the 4500 service manual? Both copies I have are from the same original, with the bottom half of the page for 6.2 Index adjustment, blacked out from a bad copy machine or...
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    Re: DPL users/owners of Howtek/Aztek scanners

    well, square one still... seems to get stuck on "calibrating... check lumens" then goes to a 702 error. I've reseated all boards, including the small ssc board on the top board. I did not remove it's...
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    Re: DPL users/owners of Howtek/Aztek scanners

    no idea about schematics, and frankly they would only baffle me. I was a service manager for a hi fi manufacturer decades ago, one product used circuit board connectors like this. The vast majority...
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    Re: DPL users/owners of Howtek/Aztek scanners

    thank you so much Ethan! I will definitely try this. Yes the frustration is always the uncertainty of whether or not the real problem was solved or simply jiggled into place for a bit. Thanks again.
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    Re: DPL users/owners of Howtek/Aztek scanners

    Hi Sandy, yes I've gone through all that multiple times now. I have not yet replaced scsi cable or card, I probably will, but I've yet to see any report that that solved issues here or elsewhere....
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    Re: DPL users/owners of Howtek/Aztek scanners

    copying this post to this thread as clearly the most Howtek expertise is here-

    After years I come back a-begging for Howtek advice! My 4500 has intermittent problems that, I assume, have never...
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    Howtek 4500 issues

    After years I come back a-begging for Howtek advice! My 4500 has intermittent problems that, I assume, have never actually been found. It will work flawlessly for days, then simply refuse, throwing...
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    Re: copal no. 3 parts question

    thanks!
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    copal no. 3 parts question

    the small knurled "knob" on the shutter cock lever on a copal 3 I have fell out. I can't identify how it was secured initially, there are no threads. The knob itself, though there is a miniature hole...
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    Re: DPL users/owners of Howtek/Aztek scanners

    I went through a period of 702 and 719 errors some months back, the thread is here if interested-
    http://www.largeformatphotography.info/forum/showthread.php?129367-Howtek-utilities-question
    ...
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    Re: Affordable printer for digital negatives

    ;)
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    Re: Howtek utilities question

    thanks for all your help. I think I'll minimally button things back up and do some more scanning, see how it goes. One last question, am I wrong to think some intermittnaat problem like this is...
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    Re: Howtek utilities question

    I got the error after moving the box and cleaning those connections though. it only stopped when I swapped leads at the VDC and VAA. I don't know, I guess I'll just get back to work...
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    Re: Howtek utilities question

    after swap, ran the HSPS test with no failures in any channel. I let it loop 30 times. Guess I'll swap them back again and see where things are at now. Frustrating.

    OK, after connections were...
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    Re: Howtek utilities question

    OK, after some weeks dealing with actual life, I'm back to this. I cleaned and reconnected the R, G, and B connections at the VDC, and even removed the optical box to do the same there. I still get...
  24. Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    there are many ways to create pixels.. resulting in dpi. Actual resolved detail has a lot to do with aperture as well as making big files. So resolution tests without attention to that setting, as...
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    Re: Howtek utilities question

    thanks Dave, sounds like the earlier suggestion of checking cables and connections, particularly for that supply, would be worth doing.
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    Re: Howtek utilities question

    latest FST results.. all passed repeatedly including PMTs, HVPs failed in green consistently.. not sure what that means... back to the manual after some fresh air...149284149285
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    Re: Howtek utilities question

    thanks all.. alignments checked, lamps, and belts have all been changed out numerous times now. The scanner has not been moved, nor the ac power been changed in any way. I don't use a UPS or any kind...
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    Re: Howtek utilities question

    see attached.. the crosshatch pattern is on the film, an image shot off a monitor (don't ask :). This is a transparency scan. The scanner is also now occasionally throwing up random errors, the 719...
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    Re: Howtek utilities question

    still experiencing occasional occasional 719 and 702 errors, but managing to get some scans done.. New problem today- intermittent green stripes in rotation direction. I seem to recall this discussed...
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    Re: Howtek utilities question

    interesting, as when I began scanning yesterday I got a 702 error.. a new development. I replaced the belt, cleaned and re lubed the screw, and it's working again.
    Possibly related to your point....
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    Re: Howtek utilities question

    for now I need to button this thing up and get a lot of scans done. Thank you for all the input, I've learned a lot and I hope to get back to solving this when things slow down again. Intermittent...
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    Re: Howtek utilities question

    got it, thank you. I will look into the scsi issue, but finding another card will be problematic in the short term. All your other suggestions I will try.
    Interestingly, it works again now, which on...
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    Re: Howtek utilities question

    yes my menu is the same and it passes every test.. the drum position/index test passed also.
    You know, the whole thing is very strange.. it was working perfectly, and it passes all the tests, yet...
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    Re: Howtek utilities question

    here is the screen cap of the PMT test. 148279
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    Re: Howtek utilities question

    AHHHH!!!! I was aware of that option and mine never had it.. sorry I wasted time with that test, I did not realize that's what the IEC was! So back to square one I guess...
    At any rate all boards...
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    Re: Howtek utilities question

    Recap and update-
    This began by the Howtek 4500, during previews, shutting down on at the "check lumens" point, reporting-

    Lamp/Mirror RGB
    error F719

    after the usual lamp replacing etc....
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    Re: Howtek utilities question

    yes I did, I appreciate that offer very much. Let me do the work here, get through the manual suggestions, etc.. exhaust those possibilities first. If I get nowhere I may take you up on that.
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    Re: Howrtek utilities question

    yes thanks, I have plenty of things to look into. The diagnostic was fairly catastrophic, but the main thing is both lamps show as failed, even though they are clearly working, and the light path to...
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    Re: Howrtek utilities question

    I guess the obvious reply is... I don't have a PC? Or do I not get something?
    Anyway, the solution, for anyone else running into this is that they will not work in OS9 running in Classic mode.. you...
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    Howtek utilities question

    I asked this on the scanner list but there are several experienced howtek users here so I'm cross posting. I'm getting this error with my 4500-
    Lamp/Mirror RGB
    error F719
    In focus mode I've check...
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