There are no shorts on the db9 pins. I will send you a pdf schematic of the T42. I use a Fluke digital meter.
If all else fails desolder the wires and start again. page 47 and 55
Do me favor and ohm out your working DB-9 to see if there are any shorts between any two pins that may not be service affecting. I picked up shorts on many of the max chips leads prior to doing any soldering and i didnt use flux yet, my bad but in my defense i was doing it on the dashboard of my truck on my lunch break, soldering iron plugged into 70W inverter :-)
On that schematic, i dont know where the lines go to once they leave the chip. Potential designed shorts on mobo?
There are no shorts on the db9 pins. I will send you a pdf schematic of the T42. I use a Fluke digital meter.
If all else fails desolder the wires and start again. page 47 and 55
Last edited by malch; 8th May, 2014 at 02:13 AM.
I have a T40 but ill look again this weekend under some good
Iight and some 5X goggles, thanks. I have no solder or flux on it now. Will tone out max chip leads onboard and report. Pretty much the entire left side 15-28 had continuity between each other as i recall but ill test again.
Last edited by pishta; 9th May, 2014 at 01:09 AM.
After further review, and using sharper probes, i determined i had no shorts off my max chip and was able to wire 5 thin leads out of a keyboard cable onto the docking traces under the tape to a db9 socket that i installed in place of the vga port. I took the entire ribbon cable out from the socket of the vga port and found out this actually cured my cdrom issue of not reading discs of all things! The 5 wires braided together just fit the channel where the vga ribbon went but i had to clip the small piece of plastic that was at the end of the plastic frame next to the screw hole for clearance. The tape lays over my solder joints and the battery keeps the tape down. Very successful modification. I am suprised IBM did not offer a serial port here as an option as they would have the ability to use the vga ribbon socket as a 'versatile' socket depending on what ribbon cable you used as the vga and serial are close enough physically to fit in the frame under the hinge
Big thanks to Malch for the docking port pinouts and the attention to this thread.
Last edited by pishta; 12th May, 2014 at 07:21 PM.
Hello, what kind of soldering tool have you guys used to make this job done? I am using a soldering device for electronics with a micro tip, but the PCB is still soo freaking small! Man, everyone who has successfully finished this is a soldering master to me. I am exceptionally curious about the guy who claims that has done this during his lunch break on a dash board of his truck!!
Any advice appreciated.
geser is the Master Solder Technician. Here is a site that will help. http://www.aes.org/sections/pnw/solder/tools.htm
You have to use a soldering iron with replaceable tips. You need a conical with a very sharp tip.
As for the truck, ask pishta.
Last edited by malch; 17th December, 2015 at 07:51 PM.
my boss has finished the job today, after all. we used a home-made soldering station with a sharp tip, RS-232 w/ wires from a scrap PC and lot of patience. Here are few pictures from that T42. We're going to try it out tomorrow.
Greetings from Czech republic
DSC02768.JPGDSC02773.JPGDSC02776.JPG
123qwe123qwe (9th October, 2019), arasss1979 (7th July, 2018), fdyg (4th February, 2017)
Thanks!
hello if someone of you know whether after this transformation to connect the car for gas installations is still needed interface and whether it is enough to just lead 2 cables RXD and TXD sorry for language
help does not work for me, please
Last edited by arasss1979; 7th July, 2018 at 01:09 PM.
nobody knows
only I need the same rxd and txd to connect to the lpg control panel I have led these cables here ... and here the stairs start because something is not working and I do not know if this is how it should be. after connecting these two cables in the hyper terminal, an echo arises as I turn on the program from the lpg installation, the connector 2 rxd and txd cables that pops up already connected to the program but after all I did not connect to the installation ..
secondly, when connected via the lpg installation interface it is the same with nothing working
I am asking for a hint where to look for a mistake
nobody knows nothing
Anybody confirmed it to work without any issues?
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