IBM 1-8MB 286 Memory Expansion Adapter (MCA)
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- For more information, see this article's corresponding Wikipedia page: Device.
IBM 1-8MB 286 Memory Expansion Adapter (MCA)
| Preliminary Information | |
|---|---|
| Release Year | 1987 |
| Leak Risk | Low |
| Batteries | None |
| Mounting Technology | Through Hole |
| Capacitor Types | Tantalum |
| Destructive Entry | No |
This MCA memory expansion card allows for up to 8MB of RAM to be installed in PS/2 Models 50, 50Z and 60. It supports extended memory and LIM EMS 3.2.
Known Issues
RAM installed on the card is not detected on POST
Causes
- Unknown
Solutions
- Unknown
Original Parts
P/N: 61X6752
P/N 61X6740 is printed on the board. Label on ROM chip U14 is dated 1986 and bears the P/N 11F8060.
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 100 nF | 0 °C | Tantalum | Markings: "104 C5K", "911 RAJ" | |||||||
| 18 | 100 nF | Tantalum | Markings: "104 C5K", "907 RFS" | ||||||||
| 2 | 10 uF | Tantalum | Markings: "10-6", "2" (circled) |
The capacitor series are unknown. Markings are provided for later identification.
Replacement Parts
Basic PCB Name
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| Digikey |
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
Kits
- Digikey BOM: https://www.digikey.com/