Specifications

TP-5700/5800 series Technical Manual 5 - 4
FORCED POWER OFF
In case of serious system halt due to system resources conflict or any reason, the
system could fail to power off through normal means. The Forced Power Off method is
designed for such occasions. With the external power switch defined as power
ON/OFF switch (default status), push down and hold this Power ON/OFF Switch. The
system will be powered off within 10 seconds in this way. Whenever the machine
receives a software command to change the external power switch to ON only, the
forced power off function is disabled for early production of this product series by mid
2003. However, since 2
nd
half 2003, an enhance power off command is provided for
the software programmer to allow forced power off after changing the switch to be ON
only. The enhance forced power off command string is <1B> <00> <00> <00> <00>
<00> <18> <18> and it has to be sent in same way like the ON only switch command.
This enhanced forced power off requires the user to keep the switch pressed for a
longer period between 10 to 20 seconds to function.
In case the system halt situation is so serious that some hardware/firmware
registrations are already confused, this above mentioned forced power off could though
very unlikely still fail. When such situation happens, please remove the external power
input from the adaptor and disconnect the UPS battery for few minutes to reset the
hardware registers.
One example of the need for this forced power off function could happen when
power switch is triggered within 10 seconds of last switching off. It is a common
practice that once the system power is switched off there should be some waiting time
before next switching back on. If the system power is switched off and on in very short
time chances are the system LED could indicate power on status while the system
remains off. In such case, please use the forced power off function to cancel the error
and wait for 10 seconds before switching on again.
UPS BATTERY
The optional UPS battery is a maintenance-free lead-acid battery and is targeted
to support basically the data preservation and smooth running of the system during
intermittent power failure. This battery is not designed for prolonged power support to
the system against power shutdown. That means, when the AC power outage is known