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PS/2 and other IBM computers batteries

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michel
Sujet du message : PS/2 and other IBM computers batteries
Publié : 14 mai 2006 22:51
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PC Rétro : IBMPS2 mod85-DOS 6.22 - Windows 3.11 fwg
 
Here's a interesting document about PS/2 and other IBM computers batteries: http://www.tavi.co.uk/ps2pages/battery.html
Bob Eager a écrit :
All PS/2s use a battery, to power the CMOS memory that holds configuration information, and to run the internal date-and-time clock. This page summarises the different kinds of batteries in use, and gives the occasional hint on obtaining or fitting them.

Machines use batteries as follows; click on the FRU number for more information on that particular item:

PS/2 model name     Model number     Battery FRU     Battery type
  Model 25-286                8525              8509237        RTC module
  Model 25SX                   8525              33F8354        3v coin cell
  Model 30-286                8530              8509237        RTC module
  Model 33 (E)                 9533              33F8354        3v coin cell
  Model 35                      8535              8509237        RTC module
  Model 40                      8540              8509237        RTC module
  Model 50/50Z               8550              72X8498        6v pack
  Model 55SX                  8555              8509237        RTC module
  Model 56                      8556              33F8354        3v coin cell
  Model 56                      9556              33F8354        3v coin cell
  Model 57                      8557              33F8354        3v coin cell
  Model 57                      9557              33F8354        3v coin cell
  Model 60                      8560              72X8498        6v pack
  Model 65SX                  8565              8509237        RTC module
  Model 70                      8570              72X8498        6v pack
  P70 Portable                 8573              72X8498        6v pack
  P75 Portable                 8573              64F9987        6v pack
  Model 76                      9576              33F8354        3v coin cell
  Model 77                      9577              33F8354        3v coin cell
  Model 80                      8580              72X8498        6v pack
  Model 90                      8590              33F8354        3v coin cell
  Server 85                     9585              33F8354        3v coin cell
  Model 95                      8595              33F8354        3v coin cell
  Server 95                     9595              33F8354        3v coin cell
  Server 95A                   9595A             33F8354       3v coin cell
  PC Server 500               86XX              33F8354        3v coin cell


FRU 33F8354

[ img ]
This is a conventional coin-shaped 3 volt lithium cell; typical cost is about $3-$5. Equivalents are:

Duracell     Ever Ready    Panasonic     Varta       Sony
 DL2032       ECR2032       CR2032     CR2032    CR2032


FRU 64F9987

[ img ] [ img ]
This consists of two conventional coin-shaped 3 volt lithium cells soldered to a small circuit board, attached to a 5cm red & black cable with a battery connector at the other end. A plastic hood covers the two cells. Currently, there is no known direct equivalent.
The lithium cells are 3 volt coin cells with two solder tags on one side. Typical cost is about $4-$9 each. Equivalents are:

Panasonic      Sony
 CR2477      CR2477

An alternate approach is to use an AT-style battery pack, or anything else that will fit inside the case! AT replacement battery packs are rated at 6.0 volts, and generally contain a resistor which prevents charging and controls the voltage. They come with attached wires, a 4 pin connector and velcro mount, and fit nicely in the battery/speaker cavity. The velcro can be used to attach it to the bottom surface so that it doesn't move. The header pinout is correct, and even has the plug in the second hole to correctly polarize the header. Cost is around $15.


FRU 72X8498

[ img ]
This is a 6 volt two-cell lithium pack. The original IBM ones are usually yellow, with black ends. Replacements are available as camera batteries; typical cost is about $10-$15. Equivalents are:

Duracell       Ever Ready        Panasonic        Kodak        Varta       Ray-O-Vac       Sanyo
 DL223A        EL223AP             CR-P2         K223LA       VL223          PC223          CR-P2


FRU 8509237

[ img ]
This is a Dallas self-contained CMOS RAM module with integral real-time clock and battery. The entire module must be replaced. The Dallas part number is DS1287, but this part is now obsolete. According to the Dallas Semiconductor data book, the DS1287 can be replaced by the DS12887 (the latter is pin compatible but has more RAM).

The DS12887 is not Year 2000 compliant, but of course PS/2s are compliant except that a manual reset of the date is required at the start of the year 2000. Do not be tempted to use the Year 2000 compliant upgrade to the DS12887, which is designated the DS12C887; it uses the century byte differently to a PS/2 and will apparently not work.

The DS1287 can also be replaced by the DS1287A, and the DS12887 by the DS12887A; the only difference in each case is that the part with the 'A' suffix has a pin which can be used to clear the RAM; this pin is unused on PS/2s.

Typical cost is $10-$15. Equivalents are:

   Dallas             Odin              BenchMarq
 DS12887      OEC12C887         BQ3287MT
DS12887A     OEC12887A        BQ3287AMT


Dernière modification par michel le 15 mai 2006 19:11, modifié 1 fois.

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michel
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Publié : 15 mai 2006 19:12
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Fixed error :D


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