DBTEL DB-6568, Руководство по обслуживанию

Страница: 63 / 73

DBTEL Incorporated
DB-6568 Service Manual Level 1 ~ 3
2003.11.13
DBTEL Copyright Reserved
Page 63 of 66
5.6
Troubleshooting procedure
The following table provides some of the typical defects that frequently occur to assist
service/repair technician with malfunction verification and service level determination and
repair guide reference
。
Figure
：
Typical defect/failure analysis and service level.
SYMPTOM 1
：
Mobile cannot power on.
LEVEL PROBABLE CAUSE VERIFICATION AND REMEDY
1
Battery defect
Original battery might have defected or worn
out.
Replace with a new or working battery and
press power switch to check. If handset
functions properly, replace the battery
2
Battery not click into place
Serious deformation of rear housing or wide
gap between rear housing and battery might
have occurred.
Replace the deformed rear housing or void
battery button.
If take actions as above but still cannot improve defection. It may be caused by PCB, this
handset should be transfer to higher service level
。
SYMPTOM 2
：
No display or partially display on LCD
LEVEL PROBABLE CAUSE VERIFICATION AND REMEDY
2
LCD module defect
Handset might have been dropping or
shocked and causes LCD module broken or
did not function properly due to other causes.
Replace with a good ,working module.
If take actions as above but still cannot improve defect. It may be caused by PCB, this
handset should be transfer to higher service level
。
SYMPTOM 3
：
Ringer malfunction or volume too small
Command
：
#*80#
à
select Ringer test item
LEVEL PROBABLE CAUSE VERIFICATION AND REMEDY