Editing Fujitsu FKB4700

{{infobox dkeyboard
| name         = 
| image name   = Fujitsu FKB4700-152.jpg
| pn           = N860-4700-T''nnn''
| fcc          = 
| branding     = 
| manufacturer = [[Fujitsu]]
| switch       = [[Fujitsu Peerless]]
| layouts      = [[ANSI]], [[ISO]]
| features     = 
| interface    = [[AT keyboard interface|AT]], [[PS/2 interface|PS/2]]
| weight       = 
| introduced   = 
| price        = 
| switch mount = 
| rollover     = 
}}

'''FKB4700''' is a fairly common series of [[Fujitsu Peerless]] keyboards from [[Fujitsu]].

==Description==
The [[rubber dome]]s of the FKB4700 are found in two sheets: one for the function key row, and one for the remainder of the keyboard. To account for differing locales and feature sets, the FKB4700 has more trace contacts and domes than is necessary for all variants. Removing the case lid of a UK ISO keyboard reveals the supernumerary trace contacts and domes: this includes three domes below Delete/End/Page Down, and a trace contact for \ when ANSI [[enter key|enter]] is selected.

The switch stabilisers are similar to those on [[IBM Model M]] keyboards, but are not particularly effective, meaning that most stabilised keys need to be struck directly above the switch. The space bar also has a small wire spring that sits on one end; its purpose is not clear, but it may be intended to increase the resistance.

Extremely unusually for a membrane keyboard, the FKB4700 series features integrated [[lock key|lock]] [[LED]]s. This is achieved by mounting the LEDs into the slider shaft plate, and by placing conductive rubber sleeves around the base of the LED pins. This allows the LEDs to make conductive contact with the top membrane without the need to apply solder.

Numbering inside the case suggests that the same case was used for keyboard lines numbered 1000, 4700 and 2931, but the other two product lines do not appear to exist.

==Variants==
In addition to branded and unbranded variants, FKB4700 has also been sold under other brands such as Triumph. The FKB4718 keyboard from Digital (p/n PCXAL-FA) bears the legend "FKB4700 series" and appears to be a rebranded PS/2 version; the plastic moulding of the FKB4718 is slightly different.<ref name="recy-Digital" /> The FKB4718 has been reported to be tactile, despite having the same switch components as any other Peerless keyboard:

:It has Fujitsu Peerless keyswitches. This switch is tactile but some people reported that there's also a clicky variant of it but I'm not so sure about that. Therefore, this one does not give out the "click" sound.<ref name="TradeMe-Digital" />

==Gallery==
The following photographs are from an unbranded '''FKB4700-152''' UK [[ISO]] keyboard with an AT connector. The controller IC is the sole place that the name "Fujitsu" appears; there is not even an FCC ID on the board to prove the manufacturer.

<gallery widths=250 heights=187>
File:Fujitsu FKB4700-152.jpg |Fujitsu FKB4700-152
File:Fujitsu FKB4700-152 -- case lid.jpg|Case lid from below
File:Fujitsu FKB4700-152 -- membrane set.jpg|Typical three-layer membrane set with curved backplate
File:Fujitsu FKB4700-152 -- membrane set close-up.jpg|Close-up of the membranes
File:Fujitsu FKB4700-152 -- membranes and domes.jpg|Membrane layers overlaid with the dome sheets
File:Fujitsu FKB4700-152 -- supernumerary traces and domes.jpg|Supernumerary trace contacts and domes
File:Fujitsu FKB4700-152 -- controller.jpg|Controller IC
File:Fujitsu FKB4700-152 -- num lock integrated LED.jpg|Integrated LED in num lock
File:Fujitsu FKB4700-152 -- LED key with windowed keycap.jpg|Windowed keycap and LED slider variant
File:Fujitsu FKB4700-152 -- LED integrated into slider shaft.jpg|Integrated LED
File:Fujitsu FKB4700-152 -- LED membrane contacts.jpg|Membrane contact tubes for integrated LED, to work around the inability to solder LEDs to membrane sheets
</gallery>

<gallery widths=250 heights=187 caption="Reassembly">
File:Fujitsu FKB4700-152 -- reassembly -- dome sheets.jpg|Dome sheets
File:Fujitsu FKB4700-152 -- reassembly -- membrane sheets.jpg|Membrane sheets
File:Fujitsu FKB4700-152 -- reassembly -- damaged retention lug.jpg|Damaged retention lug
</gallery>

==References==
<references>
<ref name="recy-Digital">RecycledGoods.com — [https://web.archive.org/web/20150414010718/http://www.recycledgoods.com/digital-pcxal-fa-fkb4700-series-keyboard-ps-2.html PCXAL-FA FKB4700 Series Keyboard PS/2] (Wayback Machine)</ref>
<ref name="TradeMe-Digital">Trade Me — [http://www.trademe.co.nz/Browse/Listing.aspx?id=563382480 Digital FKB4700 series vintage mechanical keyboard] {{dead link}}</ref>
</references>

[[Category:Keyboards with Fujitsu Peerless switches]]
[[Category:Fujitsu keyboards]]
[[Category:Keyboards with rubber domes]]
[[Category:List of all keyboards]]