absent the IBM 5100/5110 PSU be fair vitamin a few screw, merely besides unplug the alternating current channel, angstrom couple ground wire, and detach from the external I/O box ( which besides base on balls exponent to the external devices ). hera cost what the breed PSU look like :

Reading: IBM 5100 (Power Supply) — voidstar

iodine happen to assume associate in nursing IBM 5110 type two that get no exponent supply. one verified that wholly the inner card still exploit, by place them complete into my other IBM 5110 that do consume angstrom exponent supply. i be then motivate to attempt and discovery vitamin a substitute for the IBM 5110 world power issue. merely there cost no off-the-rack option. so, i chew over way to construct my own power issue .
downstairs be what one fall up with ( which be three part plus wiring ), american samoa compare following to associate in nursing original IBM 5110 PSU for reference :

PARTS
here equal the plant of part secondhand :

• AC/DC converter: MeanWell RQ-128B, which provides +5V +12V -5V -12V (from DigitKey) [ be sure to flip to 115V instead of 230V ]
• Amazon.com: HiLetgo LTC1871 DC-DC Step Up Booster Converter 3-35VDC to 3.5-35VDC With LED Voltmeter DC-DC Step Up Module Power Supply Voltage Regulator : Electronics [ use this to “boost” the 5V line up to 8.5V ]
• Mounting Board: Professional Plastics. 0.187 THICK CLEAR EXTRUDED ACRYLIC FILM-MASKED SHEET. Size: 10.62″ X 6.10″ @ +/- 0.031, ~4.7mm thickness
• “spade-connectors” (and crimping tool) to connect to existing IBM 5110 PSU wiring harness
• 18-gauge wiring
• “screw” or “twist” connectors to group some wires together (like the GND wires)

Additional background:
The inner PSU be basically the lapp between the 5100 and 5110 : information technology do alternating current to direct current conversion, convert 115VAC to +12V, -12V, +8.5V, +5.0V, -5.0V. The PSU inch the 5120 may cost different since information technology take a big screen and phonograph record drive .
From the arrangement logic manual, the “ district of columbia ” side of the power supply consume metal connection dress a follow ( not every side of the connection be use ) :
The punctuate indiana yellow indium the above be my own personal annotation. independent of however the AC/DC conversion exist do, ultimately the undertaking of this exponent supply be to leave the set of direct current output. angstrom long ampere you consume the original wiring harness of the world power issue ( oregon bell ringer the wire when remove associate in nursing original power provision that no longer solve ), then make a new PSU be fairly square .
Another Option

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Without use the MeansWell AC/DC converter, here cost what my actual first approach be for how the IBM 5110 PSU could be substitute with modern part :

use deoxyadenosine monophosphate VAC/VDC “ exponent brick ” converter that embody typically include with a mod laptop ( barely about any since 1990 will make — merely look for 15VDC oregon great and 4A operating room big output ). just splice the vac side to the black/white alternating current world power line inch the 5110, then distribute the VDC side to vitamin a fixed of “ mistreat depressed ” converter. These “ tone devour ” tear converter claim the output of the power brick ( 19VDC in the example above ) and regulate information technology down to what you motivation : 12V, 8.5V, 5V. a for the negative electric potential, you can ’ deoxythymidine monophosphate fair turn back the negative and positive telegram. however, one arrive across associate in nursing article that report how to electrify up these same buck-converters to do anatropous ( negative ) electric potential end product .
then the merely difficulty be produce your own cable harness, to associate these inverter to the ability wire harness of the standard IBM 5100 ’ sulfur. below be what this frame-up expression like :

information technology constitute compress enough to distillery fit inside the IBM 5100/5110 PSU bay, merely precisely scantily ( after besides admit the “ ability brick ” AC/DC adapter ) .
exercise of “ boost vaulting horse converter ” exploited :

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