London bound
New Member
It’s not a fault with the train. If anything it’s a design fault with the iPad. I had the same in the office today.
Then why did the train manager tell me that it was a known fault with the train when I spoke with him?
It’s not a fault with the train. If anything it’s a design fault with the iPad. I had the same in the office today.
And I’m not having this problem as I write now on another (older) LNER train??Then why did the train manager tell me that it was a known fault with the train when I spoke with him?
Had this problem today on an LNER Azuma going to Kings Cross. My Apple iPad went haywire with the keypad inserting untapped letters,etc. when it was charging. Not an issue when I unplugged it. Trouble was that my battery was low. Was told by the train manager that this is a known fault with these new trains.
Will be avoiding LNER Azuma train services for the time being.
Apple do have form on poor RF and EMC design.It’s not a fault with the train. If anything it’s a design fault with the iPad. I had the same in the office today.
Apple do have form on poor RF and EMC design.
Leakage inductance has been around since double-insulated device standards were introduced back in the mid-'70s. More recently double-insulated devices tensd to use high-frequency switch-mode power supplies which also reduces leakage inductance but increases leakage capacitance that can allow a small ac current to flow out to the device. The fact that the chargers have non-conducting plugs confirms that they are Class II devices, (i.e. double insulated), and as Bantzamen says, conductive surfaces on devices powered under Class II conditions have a strange vibration/tingle feel when stroked. The quick way to check is to grip the surface firmly with one hand and stroke it with the other hand, (preferably with the back rather than the palm or fingers). No tingle will then be felt unless the gripping hand is removed.
The current is quite safe for normal use*, it is normally a few tens of microamps (250 micro Amps max), and the open circuit voltage can be up to 50% of the line voltage (230v ac nominally).
So the touchscreen has to be tolerant of this superimposed voltage which will be present between the nominally grounded human finger and the screen. With most touchscreens now being capacitive, the internal scanning voltages will be swamped by this external voltage unless sufficient immunity is designed in.
* there are much more stringent requirements for medical devices
The issues only happen when train is operating in electric mode, when in diesel there is no issue.
The issues only happen when train is operating in electric mode, when in diesel there is no issue.
I'm sure this was discussed on the now closed GWR Class 800 thread and I noted that it only seems to be an issue when operating in electric mode?
This isn’t my experience. In electric mode there is a problem, in diesel mode everything is ok.
This happens on no other class of train. I’m writing this onboard a Pendolino with my phone charging as I type. I wouldn’t be able to do this if I was on an IEP in electric mode.
Don't quite understand your 1st paragraph reply, you agree with what I say?
Apologies - a typo on my part
Original post corrected.
Then why did the train manager tell me that it was a known fault with the train when I spoke with him?
And I’m not having this problem as I write now on another (older) LNER train??
Certain XC Voyagers have started doing this to me with my iPhone. First noticed it on 800s though. Proper Apple charger (albeit an iPad one) and cable used.
Thanks for that knowledgeable response AM9 (+ other contributors) however as an ordinary train user I think you are grabbing the wrong end of the stick. There are a large number of Apple product users in this country and reading some of the other contributions on this thread this might also be a problem with other manufacturers products also. I am generally using the trains to head to London and back on LNER but I also go by train elsewhere in the country. At this point in the 21st century I expect to get a decent Wi-Fi and mobile signal wherever I go and to be able to charge up my device, not as an optional extra or only sometimes but every time as part of the standard train service.
Fed up with my experience yesterday and not knowing how to communicate directly with LNER or Hitachi I happened to find this UK rail forum on which to vent my frustration! I was able to do this on board an older LNER train while my iPad was plugged in getting charged with no difficulties. LNER are in the process of modernising their fleet with Azuma trains but as I made clear I shall avoiding these trains in future, while it remains an option, till this issue is dealt with. I do not have it in for LNER or these Hitachi trains. I just want to get a decent travel experience. I’m hoping that in clarifying this here it might hopefully get the attention of the appropriate decision makers in LNER and Hitachi to get this sorted. After all the train manager told me it was a known problem when I reported my difficulties to him. As it happens, earlier this year I went on a group tour around the Hitachi factory in County Durham and was very impressed (my interest was not so much trains but the manufacturing/assembly process). It is providing great jobs in a part of the country that badly needs them and I wish them much success .... but please sort out this glitch!!
So I think that it's a bad combination between Hitachi charging and iPhones,
It's an issue with all iDevices and earthing, but not with most other manufacturers. It happens to me when using an iPhone or iPad on a cheap charger. I originally thought it was a fault when I first bought an iPad and took it to the Apple Store, where they demonstrated that it doesn't happen when using an Apple charger.
I'd personally call it bad design on Apple's part.
Way too simplistic. I use a "proper" Apple charger and have this happen on IETs. Never on anything, or anywhere, else. I'd put that down as firmly Hitachi's fault. Just something else I hate about the infernal boxes of rubbish they have inflicted on us, and one more reason to not use the train for long distance journeys.It's an issue with all iDevices and earthing, but not with most other manufacturers. It happens to me when using an iPhone or iPad on a cheap charger. I originally thought it was a fault when I first bought an iPad and took it to the Apple Store, where they demonstrated that it doesn't happen when using an Apple charger.
I'd personally call it bad design on Apple's part.
Apart from power bank, is there any other user solution?
Why do people plug their devices into random public USB sockets? Do they want their devices to be attacked? Charge a trusted charger and charge off that.
With both the current is return to the running rails, but the earthing arrangements are different:This is also an issue on the Class 395 Javlins on South eastern high speed.
But curiosity: not on 750DC third rail after Ashford (to Dover in this case.) Only on the 25kV OHLE from Ashford to London.
Is the power source running through a different transformer to the pax 230v sockets when on 750DC?
I'd assume the earth arrangements for the train don't change between the two sources, still back to the running rails?
I do. Screen still doesn’t work on Hitachi’s rubbish when I’m plugged in.Why do people plug their devices into random public USB sockets? Do they want their devices to be attacked? Charge a trusted charger and charge off that.