I haven't been following the threads on bad MIS carts too much, but I guess another problem is getting the chips to register when inserting a MIS-filled cart or a CFS. After a few e-mails and phone calls to Bob Zeiss, and my own chip blowing experiences I thought I'd relate a solution, in the event it is what's happening to folks. It isn't documented in the CFS instructions and only briefly touched upon on the MIS site buried in the FAq's or somewhere obsucure: It's probable that the MIS chips can get permanently messed up when installed, due to the fact that they make contact with the 1280 connector "live" and both the 1280 and the chip get confused. I found the following greatly reduces getting a "bad" chip... 1) With the old carts to be removed still in place, make sure the head is not in the cart change position ( press orange button to send carts to right parking position) and press off button. Wait a few seconds for things to settle and UNPLUG printer. Wait one minute. 2) With a small screwdriver or your finger press down on the white post that is on the left front side of head, which locks it in place. This releases the head. As the post is held down slide the head over to the left all the way. 3) If you have an anti-static wrist strap, wear it. If not, just before you pick up the cart(s), touch ground (CPU case, water pipe, etc). Static charge can zap chips. Remove old carts and install new ones. Make sure they are firmly seated, even 1/32 inch too high can misalign chip with connector. 4) Gently move head back to parking position to the right with hand. The post will not lock into place. 5) Plug in printer. Then turn on. The white post should push up into position. If you still get a red light turn off printer and unplug for one minute, then turn back on. 6) If you still can't get printer to function, the chip was bad before you installed cart or the tines of 1280 connector are bent. A bit of a pain really, but with MIS chips I get fewer DOA's this way. Jim H.
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Curing bad 1280 MIS chips
2002-09-01 by jimhayes361
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