Saturday, July 19, 2014

Samsung Travel Adapter fakes

Wanted to buy original Samsung Travel Adapter with current rate 2A.
It turns out that is not so simple... because most of them are fakes on market even if sold as super original.

Fake adapters
http://forum.xda-developers.com/showthread.php?t=2622889
http://www.youtube.com/watch?v=wi-b9k-0KfE

Andvanced reading
http://www.righto.com/search/label/power%20supply

One I've ordered via Groupon.
Seller was some local site buy2: Genuine Samsung Charger, proposal was like on this page - http://www.buy2.co.il/o/7cf4afaf-1671-448c-a655-e8aefd5c9b68
I paid 59 NIS and wet to pickup it from Hertzliya.
When I came to the shop, I told that it looks like fake adapter: letters jumping. At home I've checked idle voltage, it was above 5.3V. So I've opened a case at PayPal (as I paid with them). Time passed, no answer from seller, PayPal returned me my money.





The second I bought from eBay, seller neq-trade from Germany. Listing not more exist after I opened a case for fraud item. ~57 NIS with postal delivery.

Look closely to the following pictures


On second picture you can see wry USB port.
And highlights from first one

SIN insted of S/N
Серийныи > Серийный
произ8одства > производста
сдеЛано > СДЕЛАНО

Waiting for an answer from seller.
UPDATE (2014-07-26)
Seller send another picture of adapters he sell, that are also fakes because of wrong text on them.
END OF UPDATE (2014-07-26)

Now, let's look how original label should look like.

1. From Samsung shop in Netanya's Poleg mall, ignore model difference. Costs ~130 NIS (with cable).



2. From Bug electronics shop. Sells in original Samsung packaging, cost 89 NIS.
Perfect text alignment!

Sunday, June 22, 2014

Powerocks Rose Stone 6000

Было: iWalk Extreme 2800, которая выдавала ровно одну зарядку и была подарен сестре.
Особенности:
- ёмкость 2,800 мАч.
- отличные кабели, реально отдающий максимальный ток
- фонарик (использовался 1 раз)
- чехольчик
- вес и размеры

Взял на днях Powerrocks Rose Stone 6000.
Особенности:
- ёмкость 6,000 мАч.
- чехол
- кабель; не модный, но выдаёт честный ток
- возможность заряда 2х устройств одновременно
- прикольная индикация и скрытая кнопка; важно что индикация отключается, а не работает всё время, сохраняя драгоценные миллиамперы :-)
- 1 год гарантии - очень важно, с ебаем заниматься этим не охота.
- цена 140 шек в Ivory
- практически не греется ни при заряде, ни при разряде; металич. корпус

Кубик выдал мне почти 3 полных зарядки от 15% до 100% моего Samsung Galaxy S3.
Ток зарядки совпадает с указанным в паспорте, заряд за 2 часа.


Последняя до 85%.

Индикация ёмкости у обоих - очень не точная.

Единственный косяк, который мне кажется очевидным, это то, что в Айвори распродают старую партию от 2013 года (написано на коробке), т.е. фактическая ёмкость может быть уже меньше заявленной. Но есть гарантия и результат впечатлил.

Wednesday, May 28, 2014

Fuel Trims best ever explanation


Secret of Engine Problem Diagnosis- Fuel Trims Pt.2

Notes for myself.

Inputs:
1. Air: MAP|MAF and Temperature
2. Fuel injectors pulse width.

Engine

Ouputs:
1. O2 sensor
                 
14.7 (air) : 1 (fuel) - stoichiometry
rich at start and wide open throttle

02 sensor: 0.1-0.2V (lean) to 0.8-0.9V (rich)
not functional upto ~700 grad

STFT: immediate response
LTFT: baseline
Range -50% to +50%

Case 1. p0171 - bank1 lean
LTFT=25%, STFT=0% - vacuum leak
on idle, vac leak plays significant role. increase rpm, leak insignificant role, so LTFT should be low.
confirm by propane|carb cleaner in intake, so STFT will fall in response to rich.

Case 2. weak fuel pump, p0171 lean condition
FT can be 0% or bit above. Make load on engine as we need more fuel it will showup.
Increase RPM and see STFT, should increase too as more fuel demand and pump is weak.

Case 3. dirty MAF
Construction: heated wire to constant temperture controlled by PCM. PCM increase voltage to heat up more/less to get to set temp. When more airflow voltage vary. Also uses air temp for calculation.
LTFT around 0%.
Will behave same as in weak fuel pump. Need more inputs like fuel rail pressure or MAF readings as should be by specs.

FT +-5% regular, +-10% within spec. More than that - something wrong.

Exhaust leaks can affect O2 sensor.

Case 4. LTFT -30%. Rich condition. Maybe leaking injector.
After replacement LTFT should be updated initially with ST, later with LT.
If LTFT stays the same, problem not fixed, not injector.

Case 5. p017/4, idle, LTb1: 55%, LTb2: 2%, STb1: 55%, STb2: 0%.
Super lean at bank 1, not a fuel pump as bank 2 is ok. Vacuum hole in bank1? :-)

Also from ScannerDanner - Understanding Short Term and Long Term Fuel Trim

Monday, May 5, 2014

ISO Connector Pins Removal


Recently I was fixing issue with car multimedia system.
The problem was in poor contact in ISO connector. I was need to replace one of them.
But what if you need to reorder pins, remove ones that not in use?
I didn't find perfect guide for that, so I wrote by myself ;-)

All you need is office clip, better from thick (fat) wire.
On left normal clip, right is what you need to do from it.

There are two type of pins: with one (left) or two (right) teeth.
(Btw, left one is better it has split contacts - 4 independent instead of 2. So if you buy, choose same as left ones).

Now, how they sit and hold inside the plastic plug?
I did some awful schematics on top :-)
There is a small tooth or two that hold it in place.

Look close to your connector, try to identify them. You can also put clip inside and feel it.

Ok, how to remove?
Take the prepared clip, but before you insert it, push pin by wire as far as you can (from back to front, left to right) so the tooth will not touch plastic holder. Now, holding it in that position insert the clip easily until it stops.

No push it harder, you should feel by fingers feedback that you pushed the tooth inside.

Last step is while holding clip there pull out pin from the back and your are done!

If you have 2 teeth, follow the same procedure but insert both ends of the clip.

Repeat until you need.
When inserting them back, remember to pull-up lightly teeth (by knife or other tool) so it will hold pin again tightly.

Parking Shade

Не плохое решение для защиты от солнца на парковке у дома.
Видел в Кфар Сабе.