Inventec FLY DS400 Operating and maintenance instructions

DG12BT(FLY DS400)_Maintenance Instruction
Prepared by : Tan, Hong Yun
Approved by : Zhang, Guo-Pei
Date: 2008-07-12

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TABLE OF CONTENTS
No power on
No power on (sub-module)
Shut off automatically
Death halt
No charge
Quantity of electricity faulty detection
No display
LED NG (on the LCD)
LED NG (on the keyboard)
Key NG
No ring
No receiving voice
No sending voice or the voice is small
No vibration
Card inefficacy ((Main module)
Card inefficacy ((Sub-module)
Camera inefficacy
Bluetooth inefficacy
TF card inefficacy

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Battery CONN
FM area
Antenna
(sub-module)
FLASH
(sub-module)
Socket of PIN card
(main module)
Antenna
( Main module)
Socket of PIN card &
TF card (sub-module)
CPU
(sub-module) Earphone CONN
Crystal
(sub-module)
Adapter CONN
RF transceiver
(sub-module)
BT area
Camera CONN
Ring Chip RF PA (sub-module)

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Transceiver
(main module)
Receiver
FLASH
(main module)
K/B CONN
RF PA
(main module)
LCD
Power supply chip
CPU
(main module)

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Check whether the
battery voltage is
higher than 3.5V Charge the battery
N
Y
Check whether the battery
and the key pad of J501 is
oxidized or there is
anything else on it
Y
N
Wipe off the thing
or clean the key pad
Check whether the
connection of K/B &
M/B is OK
Y
N
Reassemble
the K/B
Take out the LCD and
SPK, Check whether it is
powered on
Cross-testing the
LCD&SPK,
Change the defective
Y
N
A
¾No power on
No power on

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Check whether
D501,R548(10K) is
broken
N
Y
Replace a earthed
capacitor corresponding to
the defective pin, Check
whether it is OK
N
Change D501,R548
Change U501
Check whether the
output frequency of
X100 is 32.768K
Y
N
Connect with the battery,
press “NO” key, check
whether the output voltage
of U501 is normal
Y
N
C509:1.8V, the capacitor: C509;
C511:2.8V, the capacitor: C511:
C528:2.8V, the capacitor: C528;
C527:2.8V, the capacitor: C527;
C530:2.8V, the capacitor: C530;
C505:1.5V, the capacitor: C505.
Change X100,
C100,C101
Check whether the
output voltage of U5
pin3 is 0.58V around
Y
Change U5,C33,L8
Change the
CPU(U100) OK
Change the
FLASH(U903) of the
main module, check
whether it is OK
N
Check whether U5
pin4 has an voltage
of 2.8V around
Y
N
Change U501
N
A

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R548
R502 R504
R505 R506
R507 R508

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¾No power on (sub-module)
No power on
(sub-module)
Check whether
RG106,RG107(47K),
QG101 is broken
Y
N
Check whether there is
anyone in CG120-
CG127 broken
N
Change RG106,
RG107,QG101
D/L the latest edition
(both main &sub module),
Check whether it is OK
N
Check whether the
output frequency of
XG100 is 32.768K
Y
NChange XG100,
CG114,CG113
YChange the defective
YOK
B

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Replace with the
programming FLASH
(UG200) of sub-module,
check whether it is OK
Change the CPU
(U100)
of main module
OK
Check whether the
output frequency of
XG5 is 26M
N
Y
N
Change XG5
Change the CPU
(UG100) of sub-module,
check whether it is OK
N
B

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Shut off
automatically
Replace with a
good battery, Check
whether the
primary cell is broken.
Y
N
Change the battery
Check whether the
rubber, used to fix the
battery, is lost or at the
other location
Y
N
Reassemble the
rubber
Check whether the battery
and the key pad of J501 is
oxidized or there is
anything else on them
Y
N
Wipe off the thing
or clean the key pad
D/L the latest edition,
Check whether it is OK YOK
N
C
¾Shut off automatically

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Check whether the
battery connector ‘J501’ is
void-welded or broken
Y
N
Re-weld or
change J501
Check whether X100
output frequency is
32.768K exactly
N
Y
ChangeX100,
C100,C101
OK
Refer to the maintenance
method of ‘No power on’
Check whether the
connection of CN601
&K/B FPC is OK,FPC is
void-welded
Y
NReassemble the K/B
Or change the FPC
Check whether there
is any pin of the
connector ‘CN601’
( M/B &K/B) broken
YChange CN601
N
C

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Death halt
Replace with a good
battery, Check whether
the primary cell is broken
Y
N
Change the battery
Check whether the
problem is resulted
from ‘KEY NG’
Y
N
Clean the K/B,
reassemble or change
the metal dome
Check whether the
problem is resulted
from the LCD itself
Y
N
Change the LCD
D/L the latest edition,
Check whether it is OK YOK
N
D
¾Dead halt

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N
Y
Replacing with the
programming FLASH of
the main module, check
whether it is OK
N
OK
Refer to the servicing
method of ‘No power on’
Check whether the
connection of CN601
&K/B FPC is OK,FPC is
void-welded
Y
NReassemble or
change the FPC
Check whether there is
any pin of the connector
‘CN601’ ( M/B &K/B)
broken
YChange CN601
Check whether the
output frequency of
X100 is 32.768 exactly Re-weld or change
X100,C100,C101
N
D

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No charge
Replace with a
good battery, Check
whether the
primary cell is broken.
Y
N
Change the battery
Replace with a good
adaptor, Check
whether the primary
adaptor is broken
Y
N
Change the adaptor
Check whether the
battery connector ‘J501’
is oxidized or is broken
Y
N
Clean or
change J501
Check whether the
connector ‘CN602’ is
void-welded or
broken
Re-weld or
change CN602
N
Y
E
¾No charge

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Change U501, check
whether it is OK
Y
N
Check whether there
is anyone broken of
R505~R508(100K)
N
Y
Change the defective
Plug in, Check whether
it has an voltage of 1V
between R502 and
R504
N
Y
Change R502(24K),
R504(100K)
Check whether there
is anyone broken of
Q501,R510
N
Change Q501,
R510(0ohm)
Change the
CPU(U100) of
the main module
OK
E

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Quantity of electricity
faulty detection
Change U501, check
whether it is OK
N
OK
Check whether there is
anyone broken of R505-
R508(100K)
Y
N
Change the battery
Change the CPU
Replace with a
good battery, Check
whether the
primary cell is broken.
Y
N
Change the battery
¾Quantity of electricity faulty detection