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ITTSB Blog Specific > ITTSB - Small projects by Kiriakos & User reviews
Nimh charger - Ansmann Energy 16 repair attempt within 2016
Kiriakos GR:
It is known that I am from the ones which they do appreciate Ansmann as this to be one of the few companies devoted at distributing smart battery chargers in Europe.
Up to date I do own most of Ansmann chargers, some came as new, and another as for example the larger Energy 8, I got this as damaged from eBay several years back and I did manage to repair it.
By owning DEREE DE-5000 LCR for several years, I am fully capable replacing any truly damaged electrolytic capacitor among other damaged parts, and finally all my repairs them are close to be called as products refurbishing, due the high quality of my repair work which this truly restore functionality by 100% and also extends product lifecycle for another 4~7 years.
At January 2016 I did managed to discover at eBay and win one damaged Ansmann Energy 16 (first generation product) not the PLUS which this is the latest.
This charger was in my wish list for years, but some how the retail price of 120~130EUR as new, this was looking to me as rather extreme.
Now that I won this Ansmann Energy 16 at a total cost of 9.50EUR + 15EUR shipping, I am truly happy and I look forward repairing this charger too.
Up to date it seems that no one repaired such a charger before, internet looks dry regarding internal PCB pictures or any technical tip about such a repair.
Regarding Ansmann it does makes you wonder of why? In the specific product they did use H-type screws (spanner slotted screw-head) security tampering screws.
Such a stupid selection of screws definably this worked against in the idea of this product to be repaired again.
Either way, I am now ready regarding knowledge and tools about engaging with such a repair.
My Ansmann Energy 16 this has not arrived yet, but I can not hold my self due my excitement and joy, finally I am getting one, and also I would be the first worldwide who will present technical details and repair tips due my Blog.
For now I will add some pictures of this charger regarding of what someone can see externally and later on I will post details of it internals.
Additionally I did manage to get a PDF of this charger, this has it technical drawing and specifications’, this is now a rare find because Ansmann discontinued this product and there is no any more any product page about it.
Either way I going to share this too, at the end of my post.
Kiriakos GR:
My charger arrived today, and luckily this has identical damage at 220V input circuitry as it did have and the Energy 8 model.
Definable this is repairable if you have skills and tools, now I am at the point taking out all PCB's for a more in-depth inspection. 8)
Kiriakos GR:
And now I finally did arrive at the hart of the problem !! ;)
Kiriakos GR:
Ansmann Energy 16 repair a bit of theory.
After examining several capacitors in this circuitry by using my LCR meter I did come down to some thoughts / suggestions to any one planning such a restoration / repair.
This circuitry it is actually twelve charging ports at 1.5v plus another four at 9V.
My findings are that almost all small capacitors at 1.5v charging ports them are totally or partially damaged and away or out of any specifications.
Its one port this have one 105C 47uf 10V (5X11mm) and another one 85C 47uf 10V (5X11mm).
These are made by TREC (Transcend Electrolytic Shenzhen co. LTD) which this is now a dead company.
I did find those capacitors datasheets and all was tested at 120Hz and their resistance this is expressed at tan-delta (Q).
Generally speaking any modern (5X11mm) Nippon Chemi-Con or Rubicon at 47uF 10V 105C this would be a superior solution as replacement.
Rubicon YXF seems to have 4000 hours life cycle compared to many others with 2000 hours or less.
Nippon Chemi-Con series KY this is also a long life capacitor.
Original capacitors part list.
10uF 50V 85C (5X11mm) = four ...........(Suggestion: replace them with Low-ESR 105C 22uF)
47uF 25V 85C (5X11mm) = two ...........(Suggestion: replace them with Low-ESR 105C)
47uF 10V 85C (5X11mm) = twelve ...........(Suggestion: replace them with Low-ESR 105C 25V)
1uF 50V 85C (5X11mm) = two
47uF 10V 105C (5X11mm) = twelve ...........(Suggestion: replace them with Low-ESR 25V)
10uF 400V 85C (13x21) = two ...........(Suggestion: replace them with 22uF 105C)
At the motherboard section there are another four 100uF 25V 85C (6X11).
At my charger I did found and the second TOP223Y sorted, and this raised my repair cost to 11 EUR as sum for two.
I am assuming that this purchase of all capacitors as new by Nichicon this it would raise the sum of the repair cost by another 15EUR (this including shipping).
In my case I did manage to use Japanese used capacitors which I was having at my workshop, and my LCR meter was a huge help at identifying which ones was healthy so them to be reused.
I am now missing few parts so to complete my repair but eventually this Ansmann Energy 16 will get back in action in a few days time.
Something interesting this is that at all TOP223Y diagrams they suggest capacitor this to be 40uF 400V 105C, but such capacitors them have a larger size by few mm but them can not be used inside this Ansmann Energy 16 PCB because there is not enough free space.
My plan and thought this is to attach at the back of the charger one small plastic case and this to storage two 40uF capacitors.
Kiriakos GR:
Few tips regarding Ansmann Energy 16 history (versions).
My own Ansmann Energy 16 according to it date stamp, this is made about 16 September 2002, this is the first batch which have a permanently attached mains power cable.
It does not need much of imagination to speculate that all it electrolytic capacitors them are totally damaged or semi damaged.
Therefore I came to the decision about to replace them all with new ( as you can see in the pictures below).
Those Ansmann Energy 16 with an attachable power cord, them are a fresher batch shown at 2007 or about there.
Either way no matter the production date of the charger, another issue is the quality of the capacitors them self, and also the unknown operation hours of its one charger.
By replacing all capacitors with new, this translates that this charger starts a new second life in your own hands.
In my case I choose to use high quality capacitors all Low-ESR 105C and from the most durable series.
I do consider major success finding stock of Panasonic and Nichicon all of them capable for 5,000hours and even 10,000 hours specification regarding trouble free operation.
By choice I did proceed to few improvements too regarding capacity.
1) All 10uF 50V 85C ( qty 4) them will be replaced by 22uF 50V 105C Panasonic FR series ( 15V line) .
2) All 47uf 10V 85C & 105C (qty 24) will be replaced by 47uF 25V 105C Panasonic FR series (individual charging channels) + qty 2 at the motherboard of major IC's.
3) At the motherboard of major IC's all 100uf 25V (qty 4) them will be replaced by 150uF 25V 105C Panasonic FR series.
4) qty 2 of 400V 10uf 85C them will be replaced by Nichicon 400V 22uF 105C (10,000 Hours) Low ESR KMX series.
And now pictures from the battle zone... ;D ;D 8)
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