Comments on: Making Standard SIMM s Work / Memory Upgrade on the HP LaserJet 6MP / 5MP http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/ Eclectic Commentary on Technology & Business by Dennis Little Wed, 25 Jan 2012 18:33:15 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: Dennis Little http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-77661 Dennis Little Wed, 25 Jan 2012 18:33:15 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-77661 Hi Mark, Thanks for taking the time to write and let us know that this trick worked for your LaserJet 4M Plus. You are welcome and happy printing! -Dennis Hi Mark,

Thanks for taking the time to write and let us know that this trick worked for your LaserJet 4M Plus. You are welcome and happy printing!

-Dennis

]]> By: Mark Robson http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-77660 Mark Robson Wed, 25 Jan 2012 18:26:37 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-77660 Hi Dennis May I add my thanks to you for this article Mine is a Laserjet 4 M plus (old but tough) and two sticks of 16 meg 72 pin memory from ebay. Sure enough it did not work just gave a 53.00.02 fault. By adding the correct links all now fine, printer recognises memory and works a treat. Thanks again. Mark. Hi Dennis
May I add my thanks to you for this article
Mine is a Laserjet 4 M plus (old but tough) and two sticks of 16 meg 72 pin memory from ebay.
Sure enough it did not work just gave a 53.00.02 fault.
By adding the correct links all now fine, printer recognises memory and works a treat.
Thanks again.
Mark.

]]> By: Dennis Little http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-75901 Dennis Little Wed, 11 Jan 2012 22:02:29 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-75901 Hi Greg, It has been 8 years since I last did this and posted about it, but let me see if I can offer some hints. ;) 1) I am unsure if your RAM (60 ns) is going to work. For some reason, I have noted here that only 70 ns or SLOWER RAM will work for the LaserJet; 60 ns is going to be 10 ns FASTER than 70 ns and that may be a problem. 2) Assuming the 60 ns stuff will work though, the next step is that you need to measure for continuity on pin 72 to any of the other pins 67-70. If you do find continuity there already, you may already have presence detect RAM; stick it in the printer and see if it works. 3) The "2/32 MB 70 ns" refers to the type and quantity of chips on the stick of RAM that you have. Figuring this out can sometimes be accomplished by looking for coding and typing in the model number printed on the RAM stick, searching Google for the specs. Then follow the chart accordingly. If you are not able to find you particular RAM listed online (I could not find mine, for instance), you may have to play a game of testing each possibility given in the jumper chart. If the printer does not recognize the RAM or show the full amount you have upgraded with, that is not the correct jumper setting. I know I had to do a little experimentation with mine to narrow down what memory chips I was working with. Best of luck! -Dennis Hi Greg,

It has been 8 years since I last did this and posted about it, but let me see if I can offer some hints. ;)

1) I am unsure if your RAM (60 ns) is going to work. For some reason, I have noted here that only 70 ns or SLOWER RAM will work for the LaserJet; 60 ns is going to be 10 ns FASTER than 70 ns and that may be a problem.

2) Assuming the 60 ns stuff will work though, the next step is that you need to measure for continuity on pin 72 to any of the other pins 67-70. If you do find continuity there already, you may already have presence detect RAM; stick it in the printer and see if it works.

3) The “2/32 MB 70 ns” refers to the type and quantity of chips on the stick of RAM that you have. Figuring this out can sometimes be accomplished by looking for coding and typing in the model number printed on the RAM stick, searching Google for the specs. Then follow the chart accordingly.

If you are not able to find you particular RAM listed online (I could not find mine, for instance), you may have to play a game of testing each possibility given in the jumper chart. If the printer does not recognize the RAM or show the full amount you have upgraded with, that is not the correct jumper setting. I know I had to do a little experimentation with mine to narrow down what memory chips I was working with.

Best of luck!

-Dennis

]]> By: Greg Ellis http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-75893 Greg Ellis Wed, 11 Jan 2012 20:30:58 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-75893 Hi Dennis, Thanks for this valuable information. I do wish to keep using my 5MP for as long as it will last mechanically. I'm a little unclear on the jumper coding in the SIMM presence detect chart above. I have two 16Mbyte SIMMs, each has the jumper pads available for pins 67-72. (They are 60nS devices, but I am not too worried about that.) Do I use the "2/32 MB 70nS" config, and solder accordingly on both of the SIMMs? I believe this to be the case, but I am not sure. Thank you so much. Greg Hi Dennis,
Thanks for this valuable information. I do wish to keep using my 5MP for as long as it will last mechanically. I’m a little unclear on the jumper coding in the SIMM presence detect chart above. I have two 16Mbyte SIMMs, each has the jumper pads available for pins 67-72. (They are 60nS devices, but I am not too worried about that.) Do I use the “2/32 MB 70nS” config, and solder accordingly on both of the SIMMs? I believe this to be the case, but I am not sure.

Thank you so much.

Greg

]]> By: Dennis Little http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-64458 Dennis Little Tue, 18 Oct 2011 17:16:45 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-64458 Hi Jim, glad to hear that my information was a help to you. Enjoy and thank you for letting me know we have another successful operation out there! Hi Jim, glad to hear that my information was a help to you. Enjoy and thank you for letting me know we have another successful operation out there!

]]> By: Jim C. http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-64456 Jim C. Tue, 18 Oct 2011 17:08:30 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-64456 Purchased 32MB 70nS SIMM modules advertised as compatible with HP LaserJet printers. Sure enough, they didn't work. Fortunately I found this site and tested the SIMMs with an ohmmeter. Pin 68 was shorted to pin 72 but pin 69 was not. A quick solder bridge later, both sticks went back in the printer and it immediately recognized them as 32MB RAM. Purchased 32MB 70nS SIMM modules advertised as compatible with HP LaserJet printers. Sure enough, they didn’t work. Fortunately I found this site and tested the SIMMs with an ohmmeter. Pin 68 was shorted to pin 72 but pin 69 was not. A quick solder bridge later, both sticks went back in the printer and it immediately recognized them as 32MB RAM.

]]> By: Joris F. http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-47579 Joris F. Mon, 13 Jun 2011 20:14:54 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-47579 Thanks to this clear write up I just successfully installed 2x 8MB Compaq EDO SIMMs in a LJ 4 plus. I didn't even have to use wires with these SIMMs. They had some "non-connected connections" between the last few pins and pin 72. So I just had to apply a drop of tin to connect pin 69 with pin 72. Thanks to this clear write up I just successfully installed 2x 8MB Compaq EDO SIMMs in a LJ 4 plus.

I didn’t even have to use wires with these SIMMs. They had some “non-connected connections” between the last few pins and pin 72. So I just had to apply a drop of tin to connect pin 69 with pin 72.

]]> By: Dennis Little http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-41673 Dennis Little Fri, 22 Apr 2011 15:39:12 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-41673 Hi Cory, glad you were able to get it to work! Hi Cory, glad you were able to get it to work!

]]> By: Cory http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-41639 Cory Fri, 22 Apr 2011 07:34:40 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-41639 Thank you, thank you, thank you. You saved me $700.00. The memory just went bad on my HP Laserjet 5Si and after purchasing 3 different 72-pin SIMMs (none of them worked), I was about to throw the printer out and go buy another one. After hours of searching I ran across this article, jumpered the pins and WOW!!! it works!! Thanks a million! Thank you, thank you, thank you. You saved me $700.00. The memory just went bad on my HP Laserjet 5Si and after purchasing 3 different 72-pin SIMMs (none of them worked), I was about to throw the printer out and go buy another one. After hours of searching I ran across this article, jumpered the pins and WOW!!! it works!! Thanks a million!

]]> By: mita http://www.keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/comment-page-1/#comment-41077 mita Sat, 16 Apr 2011 19:58:15 +0000 http://keycruncher.com/blog/2003/12/14/making-standard-simm-s-work-memory-upgrade-on-the-hp-laserjet-6mp-5mp/#comment-41077 I have HP-6MP and I bought new 16Mb SIMM RAM, installed it as recomended, but my printer not see added memory modul. What can I need to do. I have HP-6MP and I bought new 16Mb SIMM RAM, installed it as recomended, but my printer not see added memory modul.
What can I need to do.

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