Acorn Archimedes A4000: Difference between revisions

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== General Maintenance ==

Regular maintenance focuses on thermal management and mechanical components. The internal hard drive requires adequate cooling airflow, making case ventilation cleaning essential. The power supply's switch-mode design generates less heat than linear types but still requires periodic inspection. Battery replacement before leakage prevents motherboard damage. The integrated ARM250 has no socketed components, simplifying maintenance but preventing chip-level repairs.

== Troubleshooting ==

Common faults include hard drive failures manifesting as boot errors or data corruption, power supply problems causing random resets or failure to start, and video output issues often traced to the VGA output circuitry. The integrated ARM250 design means processor, memory controller, or video controller failures require complete chip replacement. IDE interface problems may prevent hard drive detection, usually resolved by cable replacement or controller chip reseating.

== Capacitor Replacement Guide ==

~~Critical capacitors requiring replacement after 30 years include power supply primary capacitors (47µF 400V~~, ~~100µF 200V), secondary filtering (1000µF 16V ×2, 2200µF 10V)~~, and ~~motherboard electrolytics (100µF 16V ×4, 47µF 16V ×6)~~. The switch-mode ~~power supply requires careful handling of high~~-~~voltage components~~. ~~Unlike earlier models,~~ the A4000~~'s two-layer PCB simplifies trace repair if capacitor leakage causes damage~~.

The A4000 main board uses conventional leaded electrolytics with surface-mount ceramic decouplers, and is not affected by the surface-mount electrolyte leakage seen on the [[Acorn Archimedes A5000]], A4 laptop and Risc PC. The recap priorities are the separate cased switch-mode PSU module and any individually aged board electrolytic; exact per-designator values are on the on-wiki [[Acorn A3010, A3020 and A4000 Technical Reference Manual]] circuit diagrams. See the [[Acorn Archimedes A4000 Capacitor Guide]].

== Legacy ==

@@ Line 313: / Line 313: @@
 == General Maintenance ==
-{{Main|Acorn Archimedes A4000 General Maintenance}}
+{{Main|Acorn Archimedes A4000 Maintenance Guide}}
 Regular maintenance focuses on thermal management and mechanical components. The internal hard drive requires adequate cooling airflow, making case ventilation cleaning essential. The power supply's switch-mode design generates less heat than linear types but still requires periodic inspection. Battery replacement before leakage prevents motherboard damage. The integrated ARM250 has no socketed components, simplifying maintenance but preventing chip-level repairs.
 == Troubleshooting ==
-{{Main|Acorn Archimedes A4000 Troubleshooting}}
+{{Main|Acorn Archimedes A4000 Troubleshooting Guide}}
 Common faults include hard drive failures manifesting as boot errors or data corruption, power supply problems causing random resets or failure to start, and video output issues often traced to the VGA output circuitry. The integrated ARM250 design means processor, memory controller, or video controller failures require complete chip replacement. IDE interface problems may prevent hard drive detection, usually resolved by cable replacement or controller chip reseating.
 == Capacitor Replacement Guide ==
-{{Main|Acorn Archimedes A4000 Capacitor Replacement Guide}}
+{{Main|Acorn Archimedes A4000 Capacitor Guide}}
-Critical capacitors requiring replacement after 30 years include power supply primary capacitors (47µF 400V, 100µF 200V), secondary filtering (1000µF 16V ×2, 2200µF 10V), and motherboard electrolytics (100µF 16V ×4, 47µF 16V ×6). The switch-mode power supply requires careful handling of high-voltage components. Unlike earlier models, the A4000's two-layer PCB simplifies trace repair if capacitor leakage causes damage.
+The A4000 main board uses conventional leaded electrolytics with surface-mount ceramic decouplers, and is not affected by the surface-mount electrolyte leakage seen on the [[Acorn Archimedes A5000]], A4 laptop and Risc PC. The recap priorities are the separate cased switch-mode PSU module and any individually aged board electrolytic; exact per-designator values are on the on-wiki [[Acorn A3010, A3020 and A4000 Technical Reference Manual]] circuit diagrams. See the [[Acorn Archimedes A4000 Capacitor Guide]].
 == Legacy ==