Question about Sharp Office Equipment & Supplies

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Sharp AL-1540CS stays in warm-up/powersave-recover mode forever. Powersave indicator flashes and the internal fan runs indefinitely. Power recycling has no effect. Took TD and drum out, inspected, reinstalled, then got error code CH. Cleared that by recycling pwr, then got code L-1 (no I did not touch the scanner lock) - cleared that. Then most recently got F-5. Tested scanner lamp... ok. Now it is back to continuous warm-up with intermittent drains on power (lights dim every min. or so). WTF??

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  • Curtis Hatcher
    Curtis Hatcher Jul 28, 2009

    Figured it would probably be an electronic problem with a board or component since the codes were intermittent, random, etc. Can you be more specific? .... I reviewed avail parts for the unit on www.precisionroller.com and don't see anything related to system/mother boards. The only replaceable parts (that they list) related to power are:



    1. FUSER - Thermistor (~$40)

    2. FUSER - Thermofuse/Thermostat (~$51)



    Then the entire fuser assembly of course ($192!). Will keep checking for replacement boards or transformer... Thanks for the help too...

  • Curtis Hatcher
    Curtis Hatcher Aug 29, 2009

    Thanks for your post on my Sharp -- I actually read it earlier in the month but haven't had a chance until today to take the machine apart and inspect more closely. Following the model-specific Service Manual, I've gained access to the PWB's and am also able to pretty closely check out the other indiv. components without having to actually get into the laser unit. In a nutshell, I cleaned, lubed, and detached/reattached & tightened everything according to the procs in the svc manual. Put everything back together and powered back up earlier this morning: There are no error codes showing at all now (which is good because it might help narrow down the faulty compnent). The unit simply sits permanently in warm-up mode, running the cooling fan (installed on the laserunit/fuser) and flashes the Power-Save indicator. It does allow me to enter tech mode by pressing the appropriate button-combo -- and I can check the scanner lightbar and perform the other tests successfully. The last detail I'll mention is this: When I press the green COPY button, the LED (on the button itself) begins flashing as well.

  • Curtis Hatcher
    Curtis Hatcher Aug 29, 2009

    Here's the latest -- Using the Sharp Service Manual, I removed the appropriate panels on the cabinet and was able to inspect indiv components pretty closely. I followed the procedures in the manual and thoroughly cleaned, lubed, re-attached, and tightened. Toner cartridge FEELS about half full and drum/fuser good-to-go. Since the initial power-up and multiple recycles, NO error codes whatsoever have appeared -- which sounds good because it might help narrow down the faulty component (PWB?). Here is what happens: The unit begins the usual warm-up process, running the cooling fan in the back, brushing its teeth and shaving, etc. However, it will not complete the warm-up process (which ironically is how I begin most work days). --- The fan runs continuously and the PowerSave icon/indicator FLASHES non-stop. I AM able to access the tech functions (using the clear + dark/light button combo) and successfully ran a few tests (illuminating the scanner light-bar, for example). The only detail worth mentioning is that when I press the green COPY button, the LED (on the COPY button) begins flashing as well. So both the COPY button LED and the Powersave LED flash continuously and the unit will stay this way indefinitely. One more detail that may not be important (or it may be The Key): The surrounding light fixtures and lamps dim briefly, repeating every 30 secs or so. It's not a total brown-out or anything, just the copier eating more amps like it would during a normal warm-up --- except it repeats over and over again... Might be significant (?)

  • Curtis Hatcher
    Curtis Hatcher May 13, 2010

    Apologies for the 27-year delay in addressing the AL-1540CS... I haven't closed the issue because I still want to fix the machine. I know it's an older unit but it has had a VERY easy life - was used the initial couple of years after purchase as a branch office MFP (mainly copying) and saw an average of maybe a dozen pages a week during that time, with occasional high usage at the first of each month when the user made 200 to 300 (separate) copies over a weekend copying notes/forms during the invoicing cycle -- which means that the optics have been ridden hard and put away wet... now that I'm thinking back. Anyway, the machine would be used as my personal MFP and is a perfect fit for my needs and anticipated usage, which would be a fair qty of b&w doc scanning during a neverending paper-to-binary archiving project; also maybe a few prints a week - like 3 pages. After all, why buy the 1650 or whatever is out now for $600 or $700 when I can spend way less money and drive myself closer and closer to suicide at the same time? BOTTOM Line: (1) Cost of parts totaling more than $250 will justify a new equip purchase; (2) The cost of my own time is not a factor b/c this is an after-hours project (one of many) that I enjoy b/c I like building and fixing things that use electricity (and I do low voltage voice/data installs as a contract tech 2nd job gig so I can use an oscilliscope); (3) Would hate to send the unit to the graveyard when it was a screw that needed to be tightened -- which is why I'll try the suggestion from MNfisherman (#2) ASAP! Thanks to all and will rate & conclude this show within the next 4 or 5 years... (I mean days... sorry).

  • Curtis Hatcher
    Curtis Hatcher May 13, 2010

    Forgot to mention on the last update: dusted everything w/compressed air etc etc, set the unit on flat work surface dressed back up in all its proper clothing -- including a new freshly installed toner cartrdge AND drum unit (all oem), then held breath and powered on. Nothing happened. Plugged the AC cord in. Tried it again. Warm-up is on with flashing LED indicator (as before) but now it is no longer indefinite -- it quieted down after a period of time approx 5 mins or so - not significnt - and after it was done displaying an image of a large middle finger, it settled on a single code: L-1. No further action from this point other than AC disconnect and moving the unit back outside near the woodpile where it's been stored (ignore that last part about the woodpile).

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4 Answers

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  • Master
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You need to firmly push upwards on the door handle until it snaps upwards, then you can simply pull in straight out.
If the handle was loose, you can tighten a screw inside the handle.
To replace the handle, line-up the screw with the slot in the clip that's on the door, push in, and then slide the handle downwards.

Posted on Aug 30, 2009

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  • Expert
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Use some air in a can to clean by the fan and all areas that you can reach. Unplug and let cool for 10 minuets. Make sure you have it on a flat surface so the unit can breath.

Posted on Aug 29, 2009

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  • Sharp Master
  • 19,396 Answers

I think two of the codes may be related, in that case replacing the mainboard located on the left rear side of the machine won't help.

To start L-1 is not necessarily the scanner lock. It just indicate feeding did not complete. It can be caused by a fault or misplacement of the optical group, or by a problem with the scanner position sensor.
CH is door open, and may have been incidental.
error F-5 is copy lamp lightning abnormality. When the lamp is working, this is a very unusual fault. The lamp may have low intensity or intensity too high.
This would be a difficult case to troubleshoot. The tech will probably read error codes again, then decide to change lamp or sensor, or test the lamp inverter with an oscilloscope.

Naturally it can also be the mainboard, but if it keeps returning codes related to optical group, then it is unlikely the main pcb.

This may be a difficult repair.

Better ordering parts from an authorized distributor: Sharp Authorized Parts Distributors.

If this comment had been helpful, do not forget to provide feedback.

Thanks.

G.

Posted on Jul 28, 2009

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  • Master
  • 2,559 Answers

Sounds like the transformer on the power board is going bad.

Posted on Jul 27, 2009

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