DBTEL DB-6568, Руководство по обслуживанию

Страница: 67 / 73

DBTEL Incorporated
DB-6568 Service Manual Level 1 ~ 3
2003.11.13
DBTEL Copyright Reserved
Page 67 of 66
SYMPTOM 11
：
After insert SIM card into handset, display still asking to insert a SIM card.
LEVEL PROBABLE CAUSE VERIFICATION AND REMEDY
1
SIM Card defect
The SIM card is being used by user might
not function well.
Insert a working SIM Card into handset and
test it with the normal operation to ensure
that it operates properly.
Recommend user to contact with the Network
Operator for necessary solution.
2
Screws are loosely secured
Screws might have not been tightened
securely onto the front and rear housing.
Ensure there is no wide gap between front
and rear housing preventing the SIM Card
contact with SIM card holder.
Tighten the loosen screws or replace with
new screws if they are worn.
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
。