====== Apple Extended Keyboard II ======

<WRAP wfix right>

|  **Apple Extended Keyboard II**  ||
| {{ :keyboard:asie-aekii-1.jpg?300 |An AEKII}} ||
| **Switch** | [[switch:alps_skcm_tan|Alps SKCM Salmon]] \\ [[switch:alps_skcm_ivory|Alps SKCM Ivory]] \\ [[switch:alps_skcm_white_ivory|Alps SKCM White Ivory]] \\ [[switch:alps_skcl_lock|Alps SKCL Lock]] |
| **Sense method** | Metal contact |
| **Protocol** | ADB |
| **Keycaps** | [[terminology:dye_sublimation|Dye-sub PBT]] |

</WRAP>

The **Apple Extended Keyboard II** was introduced by Apple in 1990 to replace it's predecessor, the [[Apple Extended Keyboard]].

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==== Construction & Changes ====

=== Case & Internals ===

The case is divided into two halves, a top and bottom-case, as well as the internal assembly. The top-case is secured by a single screw positioned at the back.

Compared to its predecessor, the [[Apple Extended Keyboard]], the keyboard has had a few notable changes in terms of case design:

  * The case has a curvy "S" shape to the side, rather than the single upwards swoop on the [[Apple Extended Keyboard]].
  * The Apple logo is located at the top-left, rather than on the bottom-left.
  * The keyboard features a slider on the back which extends a single plastic foot which runs along most of the length of the keyboard. This allows the keyboard to be tilted, an uncommon feature among Apple keyboards.

=== Switches ===

The **Apple Extended Keyboard II** initially came equipped with [[switch:alps_skcm_tan|Alps SKCM Salmon]] on US-made units before switching to dampened switches during the 28th week of 1990. Units made in the US or Mexico with dampened switches will include an 🅂 symbol on one or both rear labels. All units made in Ireland (ISO-layout) come equipped with dampened switches. [[switch:alps_skcm_ivory|Alps SKCM Ivory]] switches were used up until early 1995 when they were replaced by [[switch:alps_skcm_white_ivory|Alps SKCM White Ivory]].

The Caps Lock key always uses a [[switch:alps_skcl_lock|Alps SKCL Lock]] latching switch.

=== Switch Identification ===

Date of manufacture can be determined from the serial number sticker on the rear. For units manufactured in the US, the format **APywwxxx%MO312** is used, where:

  * **y** is the last digit of the year
  * **ww** is the week number
  * **xxx** is an alphanumeric serial

For example: **AP0112EL%MO312** would be from the 11th week of 1990.

Switch type can be inferred from date of manufacture and other information present on the rear labels:

  * [[switch:alps_skcm_tan|Alps SKCM Salmon]] switches are found in models manufactured in U.S.A. with ©1989 or ©1990 with no 🅂 symbol present and a serial number indicating manufacture no later than week 28 of 1990.
  * [[switch:alps_skcm_ivory|Alps SKCM Ivory]] switches are found in models manufactured in Ireland with ©1989 or models manufactured in U.S.A. with ©1990 and an 🅂 symbol present on one or both rear labels.
  * [[switch:alps_skcm_white_ivory|Alps SKCM White Ivory]] switches are found in models manufactured in U.S.A., Mexico, or Ireland with ©1995.

=== Keycaps ===

The keycaps are made primarily from PBT plastic except for the spacebar, which was made in ABS plastic. They boast a unique profile exclusive to Apple keyboards of that era, such as the [[Apple Standard Keyboard]] and [[Apple Extended Keyboard]].

However, unique to the **Apple Extended Keyboard II**, the "Power" keycap has flat profile. This differs from its predecessor, which had the same profile as all the other keycaps in its row.

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===== Gallery =====

== Apple Extended Keyboard II (M3501B, UK) ==

  * FCC ID: BCGM3501
  * Made in Ireland

<gallery> 
keyboard:asie-aekii-1.jpg
keyboard:asie-aekii-2.jpg
keyboard:asie-aekii-3.jpg
keyboard:asie-aekii-4.jpg
</gallery>

== Apple Extended Keyboard II (M3501, US) ==

  * FCC ID: BCGM3501
  * Made in U.S.A. ©1990
  * [[switch:alps_skcm_tan|Alps SKCM Salmon]] switches

<gallery> 
keyboard:apple_aekii-us.jpg
keyboard:apple_aekii-us_labels.jpg
keyboard:apple_aekii-us_switch.jpg
</gallery>

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{{tag>keyboard:sense-contact keyboard:protocol-adb keyboard:oem-alps keyboard:oem-apple protocol-adb keyboard:keycaps-dyesub}}