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Doc. No.
DOC-00045404 REV.
Issued Date
2008/08/18
Revised Date
2008/08/15
A01
Doc. Title
SkyWriter Service Manual
Page
46 of 83
HTC confidential
© 2008 HTC CORPORATION. ALL RIGHTS RESERVED.····························································
TOTAL 83 PAGE NO. 46
宏達國際電子股份有限公司
HTC Corporation
Chapter 7 Trouble Shooting Guide
7.1 Identify reported failure symptom before repair
Before attempt repairing the unit, make sure the type of reported failure could be clearly reproduced;
otherwise, check with the customer or distributor once again to identify the problem correctly. The
following are failure symptoms that are typical by misjudgment.
No. Item
Possibility
Main Battery low power exhausted.
While Back Light is turned OFF, the surrounding lighting will be reflected on the
panel and in a dim location; it looks like the unit is turned OFF.
1
No Power even the power
button is pressed
According to the Power Management settings, the units will be switched OFF
automatically.
The battery life depends on the devices being used in SD Card Slot, and
frequency of use of the Backlight. These functions consume a lot of energy.
2
Battery discharges quickly
Operating with front light ON, or using high-energy consumption devices such as
SD Memory Card will drain out the battery pack faster.
Using AC adapter that is NOT supplied with the unit.
3
Battery cannot be charged
Charging the battery while operating the unit with heavy loadings could cause the
temperature inside the unit to build up which could cause the unit stop charging.
At this moment, the LED indicator will flash Yellow to notify user that the charging
has been stopped. Or the temperature is extremely low will also stop charging.
Since the extreme high or low temperature will cause the battery to discharge
quickly, it has been designed to cut battery charge below TBD
℃
and above
TBD
℃
to protect the battery pack.
4
Cannot make
communications via mobile
phones through exclusive
cable.
If the unit could pass the test with Loop back Interface card, the possibility of unit
malfunction becomes low. Then the following items could be the reason of
problem such as location, timing, signal strength, service provider’s mixed up, or
problem with the mobile itself. Or could be incompatibility issue.
Card is not being pre-formatted.
Micro SD card has been switched to Write Protect mode.
5
Cannot use Micro SD
Memory Card
Card is not inserted completely or bad contact between connector contacts.