Editing Atari 600XL General Maintenance (section)

== Power Supply ==
The Atari 600XL uses an external '''regulated +5V DC''' power supply (Atari part number CO61982), the same unit used by the [[Atari 800XL]]. The power supply connects via a barrel connector on the rear of the unit.

=== Power Supply Specifications ===
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{| class="wikitable styled-table" style="width:60%; text-align:center;"
|+'''Original Power Supply Specifications'''
|-
! Parameter !! Value
|-
| '''Output Voltage''' || +5V DC (regulated)
|-
| '''Output Current''' || 1.5A (maximum)
|-
| '''Connector''' || 5.5mm barrel, centre-positive
|-
| '''Atari Part Number''' || CO61982
|}

=== Power Supply Maintenance ===
* '''Inspect the barrel connector''' regularly for signs of corrosion, discolouration, or loose fit. A poor connection can cause intermittent power delivery, leading to erratic behaviour or data corruption.
* '''Check the power cable''' for fraying, cracking, or damage to the insulation. The original Atari power supplies are now over 40 years old and the cables may have become brittle.
* '''Measure the output voltage''' with a multimeter before connecting to the computer. The output should read between +4.9V and +5.1V DC under no load. Voltages outside this range indicate a failing power supply.
* '''Consider a modern replacement''' power supply. The original units may have degraded electrolytic capacitors that affect voltage regulation. Modern switchmode replacements rated at +5V DC, 2A or greater are recommended.

{{Warning|'''Never use an unregulated power supply with the Atari 600XL.''' The system has no onboard voltage regulator for the main +5V rail. An unregulated supply may deliver voltage significantly above +5V, which can permanently damage the CPU and custom chips.}}