Editing Atari Portfolio Capacitor Replacement Guide (section)

== Capacitor List ==

The following table lists the electrolytic capacitors found on the Atari Portfolio main board. Due to PCB revision variations, exact reference designators may differ slightly between units. '''Always verify values against your specific board before ordering replacements.'''

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table"
|+ Atari Portfolio Electrolytic Capacitor List
|-
! Ref. !! Value !! Voltage Rating !! Type !! Location / Function
|-
| C1 || 100 µF || 10V || Electrolytic (SMD or through-hole) || Main power input filter — smooths battery/adapter supply
|-
| C2 || 47 µF || 10V || Electrolytic (SMD) || Secondary power filter — post-regulator decoupling
|-
| C3 || 10 µF || 16V || Electrolytic (SMD) || Voltage regulator output filter
|-
| C4 || 4.7 µF || 25V || Electrolytic (SMD) || LCD bias charge pump — negative voltage generator input
|-
| C5 || 4.7 µF || 25V || Electrolytic (SMD) || LCD bias charge pump — negative voltage generator output
|-
| C6 || 1 µF || 50V || Electrolytic (SMD) || LCD bias filter capacitor
|-
| C7 || 0.47 F (470 mF) || 5.5V || Supercapacitor (through-hole) || Memory backup — maintains RAM during battery changes (~1–2 minutes hold time)
|}

'''Note:''' In addition to the electrolytic capacitors listed above, the board contains numerous small ceramic capacitors (typically 100 nF / 0.1 µF) for decoupling. These rarely fail but should be inspected if unexplained instability occurs.