Dismantle sequence for Amicroe AMI-TT4 Tablet

http://www.fixya.com/motorcycles/t22870448-battery_not_charging_amicroe_ami_tt4

The mains charger for the Amicroe 10" Tablet is prone to failure. It is because of faulty manufacture of the DC power plug that inserts into the tablet (on the end of the charger output cable). I have dismantled the moulded plug and found that one of the internal lugs become open circuit during flexing of the plug. I have had 3 of these chargers fail within 12months of tablet purchase. Amicroe Australia will replace them under warranty. I suspect that the genuine replacement chargers have the same manufacturing fault.

Hi click on settings scroll down to. ABOUT TABLET. click this on & u should c system update...click it on .... cheers

2 possible solutions to look at.

1) Ensure that the power adaptor is the correct polarity. Ideally you should use a Casio power supply rather than a generic one. For Casio the centre pin must be - Negative. Many power supplies have + as the centre pin, this is therefore like connecting the batteries up backward - IT MAY DAMAGE YOU KEYBOARD

2) The socket on the keyboard where the adaptor plugs in is prone to breaking and coming loose from the circuit board Looks something like picture below ( maybe grey ) This can often be diagnosed by holding the power adaptor plug where you clip it into the keyboard and moving it at the same time as turning on. If you get any lights the socket is faulty and will heed to be replaced. If you post the model number I can advise on socket needed.

3) More serious internal damage possibly as a use of wrong power supply ( see note 1 )

Good luck in tracking the fault.

The mains charger for the Amicroe 10" Tablet is prone to failure. It is because of faulty manufacture of the DC power plug that inserts into the tablet (on the end of the charger output cable). I have dismantled the moulded plug and found that one of the internal lugs become open circuit during flexing of the plug. I have had 3 of these chargers fail within 12months of tablet purchase. Amicroe Australia will replace them under warranty. I suspect that the genuine replacement chargers have the same manufacturing fault.
One solution is to cut off the plug and solder on a new, better quality plug. But, so far I have not found a suitable separate plug available for purchase anywhere. However, I found a new charger on eBay here: http://www.ebay.com.au/itm/9V-AU-Wall-Charger-Amicroe-TouchTAB-IV-9-7-TABLET-PC-AMI-TT4-AC-Adapter-Power-/301137488216?

The fact that the LED's also go on/off points to a power supply fault.
First check the mains power plug for the power-pack, as if it's supplied by 2-pin 2 amp type, the adapter contacts could be loose.
If not this, or directly into speaker, check DC socket, or a cracked internal board track or dry solder-joint.

Hello,

Have you tried to replace the lamp? A good source of supply is at www.victoryglass.com
If the lamp is ok then trace out the cables that supply the lamp back to the jukebox power supply. It could be a dry joint (cold joint in the USA) on the connection pins on the board. It could also be a problem with the lampholder.

Regards
Alan Hood
ami-man
UK

Hello rudy691,

Check out the the phono connections from the Decoder through to the amplifier to make sure all the connections are seated correctly.

The Decoder boards were subject to dry joints around the phono sockets and power regulators on the board. Check out for any cracking around these soldered joints.

I would also look for dry joints (called cold joints in the USA) on the connections on the amplifier.

Regards
Alan Hood
ami-man
UK

Hello,

You say you do not have the digital display lite up, have you checked all of the breakers on the power supply?
If not do so. Rowe Ami jukeboxes are very prone to dry joints (cold joints in the USA) this is cracking around the soldered pin on the connections to the boards.
If you can solder correctly then check out the printed circuit board on the power supply. I would retest and see if the display now lights after correcting a fault on the power supply.
If that has not made any difference then proceed to the Mechanism Control Board and the Central Control Computer (CCC) and check again for dry joints.

If you can not solder with any confidence then send in your boards to a Rowe Ami specialist for testing/repair.

Regards
Alan Hood
ami-man
UK

The power socket may have dry solder on its joints, If you are not a technician, get this fixed by the service centre.

Hello,

I take it that the jukebox accepts selections when you type them in. Also that you have tried selecting the A side and the B side records.
Is the switch on the CCC (Central Control Computer) set to Record it should not be set to Video.

Rowe Ami jukeboxes are very pone to dry (cold in the USA) joints.
If you can solder then the following items need to checked for dry joints.

Power Supply PCB (printed circuit board)
CCC
Mechanism Control Board

When taking out the plugs pull on the plugs (not the wires)
Look on the soldered side where the connectors pins are fitted for any cracking around the soldered joint ( this is the sign of a dry joint).
Resolder any suspect joints on all of the boards and refit into the jukebox and test.

If this does not cure the problem then the boards will be needed to be sent to a Rowe Ami specalist, I am one of these in the UK.

Regards
Alan Hood
ami-man
UK