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XBTGT : when turned ON with USB data transfer cable connected to computer, XBTGT can not start up successfully.

Goals and Symptoms

Our quality department informed us that the failure report of XBTGT series.
When XBTGT serie unit is turned ON with your computer connected via the USB data transfer cable,
there may be rare occasions when XBTGT unit does not start up successfully.
As an interim countermeasure, we propose the below restrictions.

?Phenomenon?
When XBTGT series unit is turned ON with your computer connected via the USB data transfer cable,
there may be rare occasions when XBTGT unit does not start up successfully.
(This phenomenon occurs in three out of ten units.
However, it is confirmed that this phenomenon occurs in four out of ten times test with using relevant XBTGT units.)
The front LED of XBTGT unit is turned off the light at the time.
Once XBTGT unit has this phenomenon, XBTGT units is required to be turned off the power supply, and pull out USB data transfer cable, and leave XBTGT units for a minute.
While the USB data transfer cable is connected to XBTGT units, if the power supply is ON or OFF, it is not affect to reboot a units within a few seconds.

?Applicable type?
USB data transfer cable: XBTZG935
Model: XBTGT7340
??????XBTGT6340 XBTGT6330
???? ? XBTGT5230
??? ??XBTGT5340 XBTGT5330
??????XBTGT4340 XBTGT4330 XBTGT4230

Facts and Changes

XBTGT usb data transfer cable download power ON start up connected plugged

Causes and Fixes

?Cause?
Due to the failure of USB data transfer cable’s signal control, the protection circuit of XBTGT units is activated and it is not to start up successfully.

?Countermeasure ( interim)?
As an interim countermeasure, the insertion is attached to the USB data transfer cable.
Be sure to connect the USB data transfer cable with XBTGT unit after XBTGT is turned ON.

If the phenomenon appears, the recovery is possible with the procedure below.
1. With the USB Data Transfer Cable disconnected, turn OFF the XBT GT's power and leave the unit there for about one minute (Clear Error Detection). After that, turn ON the XBTGT’s power.
2. Connect the USB Data Transfer Cable.
Regarding to permanent countermeasure, we will inform you later.

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