Editing Psion Revo

{{Infobox computer
| name         = Psion Revo
| image        = [[File:Psion Revo.jpg|250px]]
| caption      = A Psion Revo
| developer    = Psion
| manufacturer = Psion
| type         = Clamshell palmtop / PDA
| release_date = November 1999
| discontinued = 2003
| cpu          = ARM710T @ 36.864 MHz
| memory       = 8 MB RAM; 8 MB ROM
| storage      = Internal RAM disk only; no memory card slot
| display      = 480 × 160 greyscale LCD with reflective backing, touch-sensitive; no backlight
| sound        = Loudspeaker, ½ W 8 Ω
| dimensions   = 157 mm × 79 mm × 18 mm
| weight       = 200 g
| power        = 2 × internal AAA NiMH rechargeable cells (650 mAh); 6 V DC mains adaptor
| os           = EPOC Release 5 (Symbian)
| predecessor  = [[Psion Series 5mx]]
| successor    = Conan (prototype, never released)
| model        = [[Psion Revo Plus]]; Diamond Mako; Chinese-market 618C and 618S
}}
The '''Psion Revo''' is a clamshell palmtop computer released by Psion in November 1999. It runs EPOC Release 5 on the same 36 MHz ARM710T processor as the [[Psion Series 5mx]] and runs the same software, in a case of 157 × 79 × 18 mm weighing 200 g, against the 5mx's 354 g.<ref name="wprevo" /><ref name="revohb" /> Compared with the Series 5 and 5mx, the Revo has a smaller 480 × 160 screen, no memory card slot, no backlight, and two internal rechargeable NiMH cells in place of user-replaceable AA batteries.<ref name="wprevo" /><ref name="revohb" />

== History ==

The Revo was launched in November 1999 with 8 MB of RAM, and was followed by the [[Psion Revo Plus]] with 16 MB and a larger battery. SONICblue sold the Revo Plus in the United States and Canada as the Diamond Mako, and Psion and Enfour made two Chinese-market versions, the 618C (traditional characters) and 618S (simplified characters).<ref name="wprevo" />

A successor, codenamed Conan, was close to completion when Psion left the consumer PDA market. It ran EPOC Release 6 and was to have Bluetooth and a backlight, although Bluetooth did not work in the development builds.<ref name="wprevo" />

The OpenPsion project (formerly PsiLinux) ports Linux to Psion machines including the Revo, and Revol is a version of OpenPsion optimised for the Revo.<ref name="wprevo" />

== Specifications ==

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:70%; text-align:left;"
|+'''Psion Revo specification'''<ref name="revohb" />
! Item !! Specification
|-
| Processor || 32-bit ARM710T core, 36.864 MHz
|-
| ROM || 8 MB (Psion's handbook gives 8 MB or 16 MB depending on model)
|-
| RAM || 8 MB (16 MB on the [[Psion Revo Plus|Revo Plus]])
|-
| Display || 480 × 160 greyscale, reflective backing, 125 × 48 mm viewing area; touch-sensitive, with 9 program icons and 5 command icons beside the screen. No backlight.
|-
| Keyboard || 53-key QWERTY
|-
| Sound || Loudspeaker, ½ W, 8 Ω
|-
| Storage || Internal RAM disk; no memory card slot
|-
| Communications || RS-232-compatible serial link through the docking station, up to 115,200 baud; infrared
|-
| Batteries || Two internal AAA NiMH rechargeable cells, 650 mAh
|-
| Mains adaptor || 6 V DC ±10 %, 500 mA
|-
| Size and weight || 157 × 79 × 18 mm, 200 g
|-
| Operating temperature || +5 °C to +40 °C
|-
| Storage temperature || −10 °C to +40 °C
|-
| Operating system || EPOC Release 5
|}

The Revo is software-compatible with the 5mx and has office and communications programs in ROM. Other programs are installed from a desktop computer through the docking station.<ref name="wprevo" />

== Battery and charging ==

The Revo's two AAA NiMH cells are inside the case under the lid nameplate, not in a battery compartment. They are charged from Psion's 6 V mains adaptor, either through the docking station or through the power socket at the rear of the machine.<ref name="revohb" /><ref name="r3uk" />

Charging, as Psion describes it:<ref name="revohb" />

* The Revo fast-charges to 85 % in about 1½ hours from empty, with the red light below the Esc key lit, then trickle-charges with the red light off.
* The first charge, and the first charge after a hard reset, should be a full one, which can take up to 6 hours. It sets up the battery gauge.
* Once fully charged, the Revo does not start charging again until it is disconnected from the adaptor and reconnected.
* A full charge gives typically 12 hours of continuous use. Switched off, the Revo uses about 1 % of its charge per day and keeps its data for up to 6 weeks. When the battery has run down there is enough left to keep the data for about 2 weeks.

The charge controller finds its calibration point by detecting a thermal change in the cells at about 84 % of indicated capacity. Kevin Millican's charging notes advise against putting a Revo on charge above about 84 %, because the charger may then fail to drop to trickle charge; any level between 10 % and 80 % is fine.<ref name="millican" /> The cells are NiMH, and nothing else is recommended as a replacement.<ref name="wprevo" />

A small number of 8 MB Revos had battery packs whose cells were a loose fit and could shake loose, resetting the machine and losing all data. Psion's fix was to replace the undersize cells and glue the new ones in place.<ref name="millican" /> On older machines the battery connection cable can wear and develop a high resistance, which switches the machine off under heavy load even with the gauge above 50 %.<ref name="millican" />

The replacement procedure, including the full recalibration charge afterwards, is on the [[Psion Revo Battery Replacement]] page.

== Backlight pads ==

The Revo has no backlight. R3UK's David Savery, taking apart his Revo Plus, found pads marked EL+ and EL− under black tape on the screen PCB, but measured no voltage across them, AC or DC, with the machine on or after pressing Fn+Space, the Series 5 backlight key combination.<ref name="r3uk" />

== Documentation ==

* ''Psion Revo Handbook'', version 1.1, February 2000 ([[:File:Psion Revo Handbook (February 2000).pdf|PDF]]): Psion's user guide, with the charging instructions, care and safety, troubleshooting and reset procedures, and the specification.<ref name="revohb" />
* Psion published no service manual or schematic for the Revo.

== General maintenance ==
{{Main|Psion Revo General Maintenance}}

Cleaning, charging practice and storage. See the [[Psion Revo General Maintenance]] guide.

== Troubleshooting ==
{{Main|Psion Revo Troubleshooting Guide}}

Charging and battery faults, resets and other symptoms. See the [[Psion Revo Troubleshooting Guide]].

== Battery replacement ==
{{Main|Psion Revo Battery Replacement}}

Opening the case under the nameplate and replacing the two AAA cells. See [[Psion Revo Battery Replacement]].

== Related pages ==

* [[Psion Revo General Maintenance]]
* [[Psion Revo Troubleshooting Guide]]
* [[Psion Revo Battery Replacement]]
* [[Psion Revo Plus]]
* [[Psion Series 5mx]]
* [[Psion Series 5]]
* [[Battery Refurbishment]]

== References ==

<references>
<ref name="revohb">Psion Computers PLC, ''Psion Revo Handbook'', version 1.1, February 2000, part no. 6070 0001 01: "Getting started" (pp. 14–18), "Care & safety" (pp. 196–198), "Troubleshooting" (pp. 200–203) and "Specification" (p. 206). Hosted on this wiki as [[:File:Psion Revo Handbook (February 2000).pdf]].</ref>
<ref name="wprevo">[https://en.wikipedia.org/wiki/Psion_Revo "Psion Revo"], Wikipedia.</ref>
<ref name="r3uk">David Savery, [https://www.r3uk.com/index.php/tech-tips/34-disassembly-guides/3-psion-revodiamond-mako-disassembly-and-battery-replacement "Psion Revo/Diamond Mako Disassembly & Battery Replacement"], R3UK, 9 August 2004.</ref>
<ref name="millican">Kevin Millican, [https://www.millican.info/oldsite/revobats.htm "Revo Battery Information"], 25 May 2003.</ref>
</references>

{{Navbox-Psion}}

[[Category:Psion]]