Josh: Added Capacitor_Replacement_Guides category

2026-02-11T15:12:21Z

Added Capacitor_Replacement_Guides category

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			[[Category:Capacitor_Replacement_Guides]]

Josh: Created IIvi capacitor guide

2026-02-09T11:32:47Z

Created IIvi capacitor guide

New page

The '''Macintosh IIvi''' logic board contains surface-mount electrolytic capacitors that leak after 30+ years. This guide provides capacitor specifications and replacement procedures.

The IIvi, [[Macintosh IIvx]], and [[Performa 600]] share the same logic board design, so capacitor specifications are identical.<ref>{{cite web |url=https://recapamac.com.au/macintosh-iivi/ |title=Macintosh IIvi |publisher=Recap-a-Mac |access-date=2026-02-09}}</ref>

== Why Recap? ==

Electrolytic capacitors contain liquid or gel electrolyte that leaks over time. The leaked electrolyte is:
* '''Conductive''' — creates short circuits between traces
* '''Corrosive''' — destroys copper traces and attacks solder joints

Proactive recapping prevents irreversible damage.

== Logic Board Capacitors ==

The IIvi/IIvx/Performa 600 logic board contains SMD electrolytic and axial capacitors:<ref>{{cite web |url=https://recapamac.com.au/macintosh-iivi/ |title=Macintosh IIvi |publisher=Recap-a-Mac |access-date=2026-02-09}}</ref><ref>{{cite web |url=https://console5.com/store/macintosh-iivx-iivi-performa-600-smd-tantalum-and-axial-main-pcb-cap-kit.html |title=Macintosh IIvx / IIvi / Performa 600 Cap Kit |publisher=Console5 |access-date=2026-02-09}}</ref>

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:80%; text-align:center;"
|+ '''IIvi/IIvx/Performa 600 Logic Board Capacitors'''
|-
! Capacitance !! Voltage !! Qty !! Package !! Recommended Replacement
|-
| 47 µF || 16V || 6 || SMD electrolytic || KEMET T491D476K016AT (tantalum)
|-
| 220 µF || 16V || 2 || Axial electrolytic || Vishay MAL213825221E3
|}

[[File:Mac_IIvi_Recap_Guide.jpg|center|thumb|600px|Macintosh IIvi logic board capacitor locations. Source: Recap-a-Mac]]

=== Replacement Options ===

'''Tantalum (recommended for SMD):'''
* Solid electrolyte — cannot leak
* Available from Mouser, Digi-Key
* Note: stripe marks positive terminal (opposite of electrolytic)

'''Axial electrolytic:'''
* Use 105°C rated, low-ESR types
* Match original footprint
* Stripe marks negative terminal

== Power Supply Capacitors ==

The IIvi uses a 230W power supply shared with the IIci, IIcx, IIvx, Performa 600, Centris 650, and Quadra 700. Power supply capacitors vary by manufacturer (Sony, Astec, Delta).<ref>{{cite web |url=https://68kmla.org/forums/topic/59718-compact-desktop-power-supply-capacitor-lists-by-make-and-model/ |title=Compact Desktop Power Supply Capacitor Lists |publisher=68kMLA |access-date=2026-02-09}}</ref>

Consult the specific power supply label for capacitor values. Common values include high-voltage primary capacitors (200V–400V) and secondary filter capacitors.

'''Warning:''' Power supplies contain high-voltage capacitors. Discharge before servicing.

== Tools Required ==

* Soldering iron with fine tip (for SMD) and chisel tip (for axial)
* Hot air rework station (optional but helpful for SMD)
* Solder (60/40 or 63/37, 0.5-0.8mm)
* Flux (no-clean or rosin)
* Solder wick and desoldering pump
* Isopropyl alcohol (>90%) and brushes
* Multimeter
* Safety glasses

== Removal Procedure ==

=== SMD Capacitors ===
# Apply flux to capacitor terminals
# Heat one terminal while gently tilting the capacitor
# Alternate terminals until capacitor releases
# Or use hot air at 350-380°C

=== Axial Capacitors ===
# Heat one lead while applying gentle pressure
# Remove solder with wick or pump
# Repeat for second lead
# Remove capacitor

== Cleaning ==

After removal:
# Remove all electrolyte residue with isopropyl alcohol
# Inspect traces for corrosion
# Check continuity on damaged-looking traces
# Repair with conductive pen or jumper wire if needed

== Installation ==

=== Polarity ===
'''Critical:''' Capacitors are polarized. Installing backwards causes:
* Electrolytic: bulging, popping, or fire
* Tantalum: short circuit, fire

'''SMD electrolytic:''' stripe marks negative
'''Tantalum:''' stripe marks positive
'''Axial electrolytic:''' stripe marks negative

=== Soldering ===
# Tin one pad
# Position capacitor (verify polarity)
# Tack one terminal
# Solder second terminal
# Reflow first terminal
# Clean flux residue

== Testing ==

Before reassembly:
# Visual inspection — verify all polarities
# Continuity test — check for shorts
# Power-on test — verify startup chime and operation

== Purchasing Kits ==

Pre-made kits available from:
* Console5 (console5.com)
* Various eBay sellers

== References ==
<references />

== Related Pages ==
* [[Macintosh IIvi]]
* [[Macintosh IIvi General Maintenance]]
* [[Macintosh IIvi Troubleshooting]]
* [[Macintosh IIvx Capacitor Replacement Guide]]

[[Category:Apple Vintage Computers]]
[[Category:Apple Capacitor Guides]]

Macintosh IIvi Capacitor Replacement Guide - Revision history

Josh: Added Capacitor_Replacement_Guides category

Josh: Created IIvi capacitor guide