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Osborne 1 Capacitor Replacement Guide
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== Recapping Procedure == # '''Unplug and discharge''' โ Disconnect from mains and allow several minutes for capacitors to discharge. For safety, short large power supply capacitors with a resistor before handling. # '''Disassemble''' โ Remove the rear case screws and gently lift off the case. Disconnect the keyboard and CRT cables, labelling if needed. # '''Remove logic and power supply boards''' โ Take care with the CRT and high-voltage areas. # '''Desolder old capacitors''' โ Use a temperature-controlled iron (350โ375โฏยฐC) and desoldering braid or pump. Take care not to lift PCB pads, especially on older fibreglass boards. # '''Clean pads and inspect for damage''' โ Remove any leaked electrolyte with isopropyl alcohol and a soft brush. # '''Install new capacitors''' โ Observe polarity (long lead = positive). Match lead spacing and keep replacement cans as low-profile as possible to avoid mechanical interference. # '''Check work''' โ Inspect for solder bridges, correct orientation, and clean joints. # '''Reassemble and test''' โ Refit boards, reconnect all cables, and power up via a current-limited supply or with a fused mains lead.
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