IBM 5100 Troubleshooting Guide: Difference between revisions

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# If self-tests pass, run the Customer Acceptance Test cartridge.

# Cross-reference any check-stop code against MAP document 1608314.

== Architecture ==

The IBM 5100 is built around the IBM '''PALM''' (Program All Logic in Microcode) 16-bit processor, with its operating environment (APL and/or BASIC) held in microcode "read-only storage" (ROS). It is not PC-compatible and predates the IBM PC, so PC diagnostics do not apply — use the routines in the IBM Maintenance Information manual.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>

== Power supply ==

This machine uses the internal PSU that converts 115 V AC to the system rails. Confirm every rail (the 5100/5110-type supply produces '''+12 V, −12 V, +8.5 V, +5.0 V and −5.0 V''') before chasing logic faults. Ageing electrolytics are the usual failure — recap and re-check the rails.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>

== Storage and display ==

The 5100 stores data on a quarter-inch '''DC300 tape cartridge''' and has a small built-in CRT (with a 16/64-character switch). Mechanisms need cleaning and belt/roller service; the IBM Maintenance Information manuals (on Bitsavers) give the full disassembly, adjustment and diagnostic procedures.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>

== References ==

== Related Pages ==

@@ Line 141: / Line 141: @@
 # If self-tests pass, run the Customer Acceptance Test cartridge.
 # Cross-reference any check-stop code against MAP document 1608314.
+== Architecture ==
+The IBM 5100 is built around the IBM '''PALM''' (Program All Logic in Microcode) 16-bit processor, with its operating environment (APL and/or BASIC) held in microcode "read-only storage" (ROS). It is not PC-compatible and predates the IBM PC, so PC diagnostics do not apply — use the routines in the IBM Maintenance Information manual.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>
+== Power supply ==
+This machine uses the internal PSU that converts 115 V AC to the system rails. Confirm every rail (the 5100/5110-type supply produces '''+12 V, −12 V, +8.5 V, +5.0 V and −5.0 V''') before chasing logic faults. Ageing electrolytics are the usual failure — recap and re-check the rails.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>
+== Storage and display ==
+The 5100 stores data on a quarter-inch '''DC300 tape cartridge''' and has a small built-in CRT (with a 16/64-character switch). Mechanisms need cleaning and belt/roller service; the IBM Maintenance Information manuals (on Bitsavers) give the full disassembly, adjustment and diagnostic procedures.<ref name="ibm51">[https://voidstar.blog/ibm-5100-power-supply/ IBM 5100 Power Supply], voidstar; [https://en.wikipedia.org/wiki/IBM_PALM_processor IBM PALM processor], Wikipedia; and the IBM 5110/5120 Maintenance Information manuals on [https://bitsavers.org/pdf/ibm/ Bitsavers]. Source for the PALM architecture, the five-rail PSU, and the 5120 dual power supplies.</ref>
+== References ==
+<references />
 == Related Pages ==