Digital BW, The Print

Jim,

Thanks so much for the detailed explanation.  I was not doing it the 
way you are suggesting and will give it a go.  I didn't know about 
the buffer memory problem....My only point of confusion is I don't 
see any white post to depress.  Do I have to remove the screws 
holding down the top cover to get to it?


Bill Agee



At 3:21 PM +0000 10/24/02, jim hayes wrote:
>--- In DigitalBlackandWhiteThePrint@y..., Bill Agee <billagee@r...>
>wrote:
>
>>
>>  Any suggestions would be helpful.  I have tried pulling the plug
>>  while the head is on the left side and being loaded, just to avoid
>>  any shorting out of the chip...doesn't seem to make any difference
>>  one way or another.
>>
>>  feeling electronically challenged tonight,
>>
>>  Bill Agee
>>  --
>
>The procedure that Bob Zeiss outlined to me was to first turn printer
>off with the off button. Unplug printer. Then push down on white post
>locking the head and slide it by hand to the left. Install cart. Slide
>by hand back to right. Plug in. Turn on.
>
>I was afraid to mess with the white post at first so I did what you
>did...send the printhead over to left under power and simply unplug. I
>also blew out a set of chips or two this way. When I did it exactly as
>Bob had outlined it above, I can't say I had 100% sucess, but it
>seemed more reliable.
>
>The other thing I do is use a static wrist strap when I install chips.
>And Bob says only to use finger presure to press them on as the small
>board may otherwise be mechanically stressed. The holes on the newer
>chips are enlarged a bit so they fit on the pegs better than they did
>six months ago. If the chip is too loose however, it should either be
>glued on or not used. I have had problems with glue coming close to
>messing up the printer contacts, so I avoid it.
>
>I use the QB7 chip resetter which allows me to reset the chip after I
>have pressed it on with my finger. Other resetters reset the chip
>before it is installed which I don't like. From the time I install the
>chip to when the cart is put in printer, I also try to keep the chip
>from getting close to sources of static charge like plastic bags, etc.
>Putting cart in a anti-static bag is a neat idea.
>
>And some chips are just plain DOA, so I keep extras around and order
>free replacements when I find one.
>
>Also, reading the instruction sheet for the f-16 chip resetter is
>instructional. Although it deals with another kind of resetter
>entirely, it talks about turning printer off and unplugging for one
>minute and trying a reset again. Apparently there is memory retension
>in the printer buffer which needs up to a minute to clear itself with
>power unplugged.
>
>BTW it's not "shorting" of the chip AFAIK. It's the fact that the
>printer has a buffer memory of the last chip it had in it. When a new
>chip is in suddenly it doesn't match and the buffer on the printer and
>the buffer on the chip get confused...the chip memory permanently. The
>printer than has to have it's memory cleared by being turned off FIRST
>and then possibly unplugging for up to a minute. This does not seem to
>be as big a problem with an Epson cart, I can usually just pop them in
>under power. I've speculated on installing the chips off real Epson
>carts on the MIS carts and seeing how they work, but I have to use up
>a cart first<g>.
>
>There is one situation where it is a physical electrical contact
>problem and not a buffer data problem...if cart is not firmly seated
>within 1/32 inch, it also causes a red light problem.
>Jim H.
>
>
>
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-- 

bill agee studio
capistrano beach, ca / laguna beach, ca

http://www.redsilver.com