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Wednesday
Feb212018

Replacing a PURE Evoke Flow Display

Update 31st March 2018 - Display no longer sold

Since writing this article I have been informed that the supply of displays finally dried up - the source was shipping untested units and Adrian at AJSDyno was suddenly getting a 75% failure rate, so he's finally had to abandon selling these displays. We decided to leave my photo sequence up for anyone who manages to get hold of a replacement in the future, but as Adrian says, sadly it's the end of an era! AW


In 2008 I received a PURE Evoke Flow DAB/ Internet radio as a birthday gift and this cherished radio receiver had been on duty ever since as a portable Internet tuner (thanks to a Chargepak rechargeable battery), doubling as a bedside radio with dual alarms and wireless remote control.  The radio recharged overnight ready for a busy day ahead, seated on my desk. The PURE Evoke Flow opened up a new world of online streaming radio with integral services such as Pure Sounds (rainfall, babbling brooks, breaking waves etc.) and BBC Listen Again, both of which, sadly, have long since been discontinued and are greatly missed.

PURE was launched back in 2001 by the higher-end VideoLogic division of UK graphics chipmaker Imagination Technologies. This was at a time when DAB radio was emerging as an exciting new radio standard and PURE was being positioned as a premium consumer brand. Imagination hit hard times and the PURE brand itself was sold off in 2016. Imagination’s major customer Apple also pulled the plug, deciding to make its own graphics chips instead, and a bitter trade dispute followed. Imagination was snapped up by a Chinese/ US private equity firm in 2017. The PURE brand still lives on, thanks to Austrian financial backers.

A Display of PURE Genius

One of the PURE Evoke Flow’s finest features was its yellow OLED graphics display which needed no backlight and had much greater clarity, luminance and viewing angle than an ordinary LCD did. As every Evoke Flow owner doubtless knows by now, unfortunately the display would fade after a few years (say six or more) as its organic element deteriorated until the display blanked out altogether, rendering the radio nearly useless.

Sad to say, the same fate befell my own radio and I have searched in vain for a replacement display for several years. Spares became unobtainable once RS Components discontinued the Bolymin 128 x 64 pixel BL12864KERNH$​ (Stock No. 668-6124). I failed to find any foreign source that would ship a single replacement display.  Reluctantly, mid 2017 my PURE Evoke Flowe was replaced by a Medion 2.1 tabletop DAB/ LAN radio, which has a colour LCD, IR remote, and built-in stereo speakers and woofer, with an app. able to control the basics from a smartphone. The radio is excellent but it already seems to have been discontinued by Medion.

New OLED Display for PURE Evoke Flow, Avanti, Evoke-1S.

The search for a new display having defeated me (and I don’t give up easily), in 2018 I was really delighted to learn that an enterprising individual has managed to source and import replacement yellow OLED displays that fit the PURE Evoke Flow, Avanti Flow and Evoke-1S Marshall, PURE's guitar amp style DAB radio.

I feared it might be too good to be true but, sure enough, after placing an order online with the UK seller AJSDyno a small carton soon arrived containing a new display for my ten year old radio. Perfect! Next was a learning curve to figure out how to fit the new part, so here’s my photo sequence and instructions to help those wanting to replace their displays with minimum fuss.

Only basic tools are needed but a lot of ‘sympathy’ and some dexterity when handling delicate parts is also required: allow yourself half an hour of quality time and work carefully, don’t rush things and you should be fine.

DIY Instructions to replace a PURE Evoke Flow OLED

Unplug the radio from its a.c. adaptor and if a Chargepak battery pack is fitted, remove it. The display is accessed from the rear of the radio, which is secured by six Philips screws, so start by removing them.

Remove 6 x Philips screws holding in the rear panel [click to see]... and swing the panel out, as if it's hinged on the left hand sideThe rear panel can be gently prised out with a plastic spudger or similar tool, swinging it gently out from the right and allow it to rest on the worktop. It carries the main board and some interwiring. Note how some wires and ribbons hook the mainboard to the SnoozeHandle, loudspeaker, front panel controls and the Imagination Technologies display controller.

The rear panel resting on the workbench. Take care not to strain the taut blue wire (SnoozeHandle PCB)A word of warning,

THE SINGLE WIRE (ARROWED) CONNECTING THE SNOOZEHANDLE IS QUITE TAUT. IT IS SOLDERED AT BOTH ENDS AND CANNOT BE DISCONNECTED WITHOUT DESOLDERING IT. TAKE CARE NOT TO TUG OR STRAIN THIS WIRE OR THE TINY PCB CONNECTING THE SNOOZE HANDLE MAY BE DAMAGED!

So ensure you don’t strain this wire.  You can easily pull the two-pin loudspeaker wire connection off the main board. This frees up things to give more access to the innards.

The main front panel connection cable (a silver ribbon, 15mm wide) is quite sturdy and simply slides out of its PCB connector embedded in the front panel on the left, so note which way round the blue ‘pull tab’ goes and pull the ribbon wire gently out. (You can choose to leave this connected if you have the dexterity to work around it, but you may find it slips out accidentally anyway.)

Main board resting on the worktop, display PCB arrowedThe OLED display ribbon in situ, note pins 1-22 markedThe OLED display connects using a flexible printed circuit board ribbon. The connector is probably hidden under some masking tape which can be removed.

Showing how the connector latches must be disengaged before disconnecting the ribbonDO NOT PULL THE RIBBON OUT! It’s numbered 1 and 22 to show the polarity of the flexible cable. Look closely at how the OLED ribbon is seated in the connector, which has a black plastic clamp to secure it in place.

Use a pointed tool or maybe a fingernail to slide out the retaining latch at both endsA pointed plastic tool (or your fingernails) must be used to slide the black plastic clamp outwards to the edge of the PCB. It’s effectively just one latch with two handles on the end that pop out evenly about 2mm, and then gently slide out the display’s flexible ribbon.

Then remove the flexible ribbon from the connectorThe rear of the OLED plastic housing is detached by removing four small Philips screws.

The four Philips screws (circled) are removed nextYour display is probably screened with adhesive copper foil stuck to it. The display is merely stuck with double sided tape around the edges of the display. It is easy to gently pry it off using a plastic spudger tool and it will come away.

Carefully pry the display away off the adhesive border

I FOUND THE NEW DISPLAY NEEDS TO BE STUCK ON ‘UPSIDE DOWN’ COMPARED WITH THE OLD ONE, TO ALIGN THE 1-22 PINOUTS OF THE PCB CONNECTOR.

The new display from AJSDyno - when fitted, the ribbon sprouts from along the TOP edgeClean the window if necessary with eg a little Isopropanol. Unpeel the clear protection poly film off the new display.  The OLED can be applied and stuck down, aligning it in the radio's display window as best you can, with the flat flexible ribbon sprouting out of the TOP, doubled over downwards towards the controller PCB so the 1-22 pinout markings are visible on the ribbon as before. The old adhesive should still be strong enough but you'll be able to lift and reposition the display if necessary.

The replacement display from AJSDyno, fitted in place. Re-assembly, as they famously say, is the reverse of the above. Pass the OLED ribbon through the slot in the black plastic housing and screw down with 4 Philips screws.

To re-connect the OLED to the PCB, you must ensure the black plastic latches are STILL OUT by a few millimetres then gently slide the connector ribbon in as far as it will go. You'll know it's right when the bare copper conductors on the end of the flexible ribbon disappear into the housing, after which it can't go any further. Gently but firmly slide the black plastic latches inwards again to clamp the ribbon evenly in place.

If necessary, re-insert the silver front panel ribbon, the right way round, into its own connector ensuring the flat ribbon is even and flush with the connector.

Reconnect the loudspeaker and close up the housing by 'swinging it back into' the case, starting at the left-hand (telescopic aerial) side, always taking care not to strain the blue SnoozeHandle wire, then screw the rear back onto the housing.

Powered up and working again! [click to see]The radio can then be powered up and tested.  Mine worked immediately,  even after all this time it remembered the settings and found my LAN again. The remote control worked again too with new batteries (remember there is a 'Hardware Bind' button in the remote, to pair it that way if needed). Surprisingly, my radio then updated its firmware over Wi-fi to V5.1.The display active/ standby brightness can be dimmed via the Options menu if it is too bright.

LEGACY LINK : Replacement Evoke Flow OLED Display from AJSDyno

Part no longer available as at 31st March 2018

Reader Comments (13)

Great writeup Alan!

February 24, 2018 at 11:32 | Unregistered CommenterAJS

I found this by completing a Google search- It's a great write up which has helped me bring my radio back to its best.

Always good to be able to repair something !

Thanks to Alan.

March 19, 2018 at 22:34 | Unregistered CommenterAndy Moore

It always good to get some information to avoid doing a repair like this "in the dark."

This guide is very comprehensive and well put together and gives the repairer really useful tips.

I hate to throw away usable equipment and thanks to this guide my radio is now back, no longer obsolete.

Good work Alan.

March 24, 2018 at 21:57 | Unregistered CommenterJoseph Gulaiczuk

Thanks for the write up, Alan and AJSDyno for sourcing the screens, I just fitted mine and now I can see again!!

March 25, 2018 at 13:26 | Unregistered CommenterMi

Superb - £20 and 50mins effort (while watching TV) - good as new!

March 28, 2018 at 17:07 | Unregistered CommenterBrizzle_H

Update 31st March 2018 - Display no longer sold

Since writing this article I have been informed that the supply of displays finally dried up - the source was shipping untested units and Adrian at AJSDyno was suddenly getting a 75% failure rate, so he's finally had to abandon selling these displays. We decided to leave my photo sequence up for anyone who manages to get hold of a replacement in the future, but as Adrian says, sadly it's the end of an era!

March 31, 2018 at 14:15 | Registered CommenterAlan W

Thanks for this page and the information! I managed to get my display changed out just before this recent bad news! Thank you!

April 20, 2018 at 5:31 | Unregistered CommenterChris

Could this be a new source for replacements?

https://www.alibaba.com/product-detail/2-7-inch-128x64-12864-SSD1305_60671545961.html

April 27, 2018 at 12:22 | Unregistered CommenterAlex

I'm told that despite what their advert says they can only supply the less bright ones now [= borderline failures], so it looks like it's already been investigated and found unsuitable. Oh well.

April 28, 2018 at 19:15 | Registered CommenterAlan W

Thanks ! Tried ebay, got one of the slightly duller displays for 12.50 ,arrived the next day that - and your great instructions did the business! THANKS!

June 5, 2018 at 22:00 | Unregistered CommenterRory Shearer

I have managed to find a supplier on ebay at:
https://www.ebay.co.uk/itm/123124202257
and thanks to Alan`s excellent instructions I have managed to replace the OLED which now works like it did when the radio was new.
There the good news ends, because I seem to have damaged the connector for the 2-pin loudspeaker wire and now I can only listen to the radio through headphones. Any advice in solving this new problem would be greatly appreciated.

June 8, 2018 at 16:55 | Unregistered CommenterMike Nye

Mike, without looking at it, it's probably easiest to solder the two speaker wires directly to the two pin header on the board, but it needs some soldering skills, perhaps you know someone who could do that.

June 9, 2018 at 23:48 | Registered CommenterAlan W

Much appreciated! Had been wondering what to do with my Evoke Flow after the display disappeared completely.
Managed to find a spare OLED on eBay for £12.50 + £2.50 p&p.
Although this part is only a half brightness model which means it's a bit dim in full daylight, it lets me use it again which is fantastic!

June 19, 2018 at 12:09 | Unregistered CommenterSimon Denman

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