Psion Revo Plus
 | |
| A Revo alongside an Ericsson MC218 — the rebadged Series 5mx — showing the size difference between the two EPOC machines | |
| Specifications | |
|---|---|
| Developer | Psion Teklogix |
| Manufacturer | Psion Teklogix |
| Type | Clamshell palmtop / PDA |
| Released | 2000 |
| Discontinued | 2003 |
| CPU | ARM710T @ 36 MHz |
| Memory | 8 MB ROM; 16 MB RAM |
| Storage | Internal RAM disk only — no CompactFlash slot |
| Display | 480 × 160 monochrome LCD, 16 greyscales, resistive touchscreen, no backlight |
| Sound | Speaker |
| Dimensions | 157 mm × 79 mm × 17 mm |
| Weight | 200 g |
| OS / Firmware | Symbian (EPOC32) Release 5 |
| Predecessor | Psion Revo |
| Model no. | Rebadged for the United States and Canada as the Diamond Mako |
The Psion Revo Plus is the upgraded Revo: 16 MB of RAM instead of 8 MB, a larger battery, and — importantly for anyone repairing one — a fix for the loose-battery problem that afflicted the original.[1]
Everything else is a Revo: the same 36 MHz ARM710T, the same 480 × 160 screen with no backlight, no card slot, the same 157 × 79 × 17 mm case at 200 g, and the same two internal NiMH AAA cells.[1][2]
The whole of Psion Revo applies to this machine. This page records what is different.
What changed
[edit | edit source]| Change | Detail |
|---|---|
| RAM | 16 MB, doubled from 8 MB |
| Battery | Larger than the Revo's |
| Battery retention | Fixed. The original Revo suffers from batteries coming loose and unplugging inside the case; this was corrected on the Plus |
| Rebadge | Sold in the United States and Canada by SONICblue as the Diamond Mako |
The RAM increase is the headline, but the battery retention fix is the one that matters for restoration. On an original Revo, a machine that intermittently dies or refuses to charge may simply have its battery connector working loose inside the case — a failure mode the Plus does not share.[1]
Batteries
[edit | edit source]Still two internal NiMH AAA cells, still soldered to a connector, still sealed under the nameplate, and still not user-replaceable.[1][3]
The same rules apply as on the Revo:
- NiMH cells only, because of how the charging circuit works.[1]
- Do not charge when the battery is already above about 80 % — the charge termination depends on a thermal change around that level, and missing it leads to overcharging. This caution applies to both Revo models.[1]
- After a replacement and hard reset, charge uninterrupted from 0 % to 100 % so the hardware can recalibrate.[1]
The full procedure is on Psion Revo Battery Replacement, which covers the Revo, the Revo Plus and the Diamond Mako together.[3]
General maintenance
[edit | edit source]Troubleshooting
[edit | edit source]Battery replacement
[edit | edit source]See also
[edit | edit source]References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "Psion Revo", Wikipedia. Source for the Revo Plus's RAM and battery differences, the fix for the loose-battery problem, the Diamond Mako rebadge, and the battery, charging and recalibration behaviour shared with the Revo.
- ↑ 2.0 2.1 "Psion 3mx, Psion 5, Psion 5mx, Psion Revo and Psion Revo Plus specifications", netogram.com. Source for the Revo Plus ROM and RAM sizes, dimensions, weight, interfaces, docking station, battery type and power adapter rating.
- ↑ 3.0 3.1 David Savery, "Psion Revo/Diamond Mako Disassembly & Battery Replacement", R3UK, 2004. Source for the disassembly and battery replacement procedure, which covers the Revo, the Revo Plus and the Diamond Mako.