FLY DS400 Schematic

DG12BT(FLY DS400)_Maintenance Instruction

Prepared by : Tan, Hong Yun
Approved by : Zhang, Guo-Pei
Date: 2008-07-12

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

Innovating Customer Value

Inventec Confidential

 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

2

Innovating Customer Value

Antenna
( Main module)

Adapter CONN

Socket of PIN card
(main module)

(sub-module)

CPU

Battery CONN

FM area

BT area

Earphone CONN

Camera CONN

Antenna

(sub-module)

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Socket of PIN card &
TF card (sub-module)

FLASH
(sub-module)

Crystal
(sub-module)

RF transceiver

(sub-module)

Ring Chip RF PA (sub-module)

3

Innovating Customer Value

RF PA

(main module)

K/B CONN

CPU

(main module)

FLASH

(main module)

LCD

Receiver

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Transceiver
(main module)

Power supply chip

4

¾No power on

Innovating Customer Value

No power on

Check whether the

battery voltage is

higher than 3.5V

Y

Check whether the battery
and the key pad of J501 is

oxidized or there is

anything else on it

N

Check whether the

connection of K/B &

M/B is OK

N

Take out the LCD and

SPK, Check whether it is

powered on

N

Y

Y

Y

Charge the battery

Wipe off the thing

or clean the key pad

Reassemble

the K/B

Cross-testing the

LCD&SPK,

Change the defective

Inventec Confidential

N

A

5

Innovating Customer Value

A

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.

Check whether

D501,R548(10K) is

broken

N

Connect with the battery,

press “NO” key, check

whether the output voltage

of U501 is normal

Y

Check whether the

output frequency of

X100 is 32.768K

Y

Check whether the

output voltage of U5

pin3 is 0.58V around

Y

Change the

FLASH(U903) of the

main module, check

whether it is OK

Y

N

N

N

Change D501,R548

Replace a earthed

capacitor corresponding to

the defective pin, Check

whether it is OK

Change X100,

C100,C101

Check whether U5

pin4 has an voltage

of 2.8V around

N

N

Y

Change U501

Change U5,C33,L8

Change U501

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N

Change the

CPU(U100)

OK

6

R502 R504

Innovating Customer Value

R548

Inventec Confidential

R505 R506

R507

R508

7

Innovating Customer Value

Inventec Confidential

8

¾No power on (sub-module)

Innovating Customer Value

No power on

(sub-module)

D/L the latest edition

(both main &sub module),

Check whether it is OK

N

Check wheth e r

RG106,RG107(47K),

QG101 is broken

N

Check whether there is

anyone in CG120-

CG127 broken

N

Check whether the

output frequency of

XG100 is 32.768K

Y

Y

Y

Y

N

Change the defective

OK

Change RG106,

RG107,QG101

Change XG100,

CG114,CG113

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B

9

Innovating Customer Value

B

Check whether the

output frequency of

XG5 is 26M

Y

Replace with the

programming FLASH

(UG200) of sub-module,

check whether it is OK

N

Change the CPU

(UG100) of sub-module,

check whether it is OK

N

N

Change XG5

Inventec Confidential

Change the CPU

(U100)

of main module

OK

10

Innovating Customer Value

Inventec Confidential

11

Innovating Customer Value

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12

¾Shut off automatically

Innovating Customer Value

Shut off

automatically

D/L the latest edition,

Check whether it is OK

N

Replace with a

good battery, Check

whether the

primary cell is broken.

N

Check whether the

rubber, used to fix the

battery, is lost or at the

other location

N

Check whether the battery
and the key pad of J501 is

oxidized or there is

anything else on them

Y

Y

Change the battery

Y

Y

Reassemble the

Wipe off the thing

or clean the key pad

OK

rubber

Inventec Confidential

N

C

13

Innovating Customer Value

C

Check whether the

battery connector ‘J501’ is

void-welded or broken

N

Check whether the

connection of CN601

&K/B FPC is OK,FPC is

void-welded

Y

Check whether there

is any pin of the

connector ‘CN601’

( M/B &K/B) broken

N

Check whether X100

output frequency is

32.768K exactly

Y

N

Y

N

Re-weld or

change J501

Reassemble the K/B

Or change the FPC

Change CN601

ChangeX100,

C100,C101

Inventec Confidential

Y

Refer to the maintenance

method of ‘No power on’

OK

14

Innovating Customer Value

Inventec Confidential

15

¾Dead halt

Innovating Customer Value

Death halt

D/L the latest edition,

Check whether it is OK

N

Replace with a good

battery, Check whether

the primary cell is broken

N

Check whether the
problem is resulted

from ‘KEY NG’

N

Check whether the
problem is resulted
from the LCD itself

Y

Y

Y

Y

Change the battery

reassemble or change

OK

Clean the K/B,
the metal dome

Change the LCD

Inventec Confidential

N

D

16

Innovating Customer Value

D

Check whether the

output frequency of

X100 is 32.768 exactly

Y

Check whether the

connection of CN601

&K/B FPC is OK,FPC is

void-welded

Y

Check whether there is

any pin of the connector

‘CN601’ ( M/B &K/B)

broken

N

Replacing with the
programming FLASH of
the main module, check

whether it is OK

N

Re-weld or change

X100,C100,C101

N

Y

Reassemble or

change the FPC

Change CN601

Inventec Confidential

N

Refer to the servicing

method of ‘No power on’

OK

17

¾No charge

No charge

Replace with a

good battery, Check

whether the

primary cell is broken.

N

Replace with a good

adaptor, Check

whether the primary

adaptor is broken

N

Innovating Customer Value

Y

Y

Change the battery

Change the adaptor

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Check whether the

battery connector ‘J501’

is oxidized or is broken

N

Check whether the

connector ‘CN602’ is

void-welded or

broken

N

E

Y

Y

Clean or

change J501

Re-weld or

change CN602

18

E

Plug in, Check whether

it has an voltage of 1V

between R502 and

R504

Y

Innovating Customer Value

N

Change R502(24K),

R504(100K)

Check whether there

is anyone broken of

R505~R508(100K)

Y

Check whether there

is anyone broken of

Q501,R510

N

Change U501, check

whether it is OK

N

Change the

CPU(U100) of

the main module

N

Y

Change the defective

Change Q501,

R510(0ohm)

Inventec Confidential

OK

19

¾Quantity of electricity faulty detection

Quantity of electricity

faulty detection

Replace with a

good battery, Check

whether the

primary cell is broken.

Innovating Customer Value

Y

N

Change the battery

Inventec Confidential

Check whether there is

anyone broken of R505-

R508(100K)

N

Change U501, check

whether it is OK

N

Change the CPU

OK

Y

Change the battery

20

¾No display

Innovating Customer Value

No display

Check whether changing
the LCD driver can solve

the problem

N

D/L the latest edition,

Check whether it is

OK

N

Check whether the

LCD is weakly

welded or broken

N

Check whether

R602(0ohm) is broken

Y

Y

Y

Y

Change and

save the driver

OK

Re-weld or

change the LCD

Change R602

Inventec Confidential

N

Change the CPU

Of the main module

OK

21

Innovating Customer Value

Inventec Confidential

22

¾LED NG (on the LCD)

Innovating Customer Value

LED NG (LCD)

Check whether the

LCD is broken

N

Check whether

L501,L502 are broken

N

When normally

backlighting, check

whether the voltage of

Q502 pin3 is at the

high level

N

Check whether there is

anyone broken of

R539,R537,R540,

R541

N

Y

Y

Y

Y

Change the LCD

Change L501,L502

Change Q502,D502

Change the defective

Inventec Confidential

Change U501,

check whether it is

OK

N

Change the CPU

of the main module

OK

23

Innovating Customer Value

Inventec Confidential

24

¾LED NG (on the key board)

Innovating Customer Value

LED NG (key)

Checking method：Cross-
testing the two sides of
LED by Multimeter ,
gearing to the short circuit,
if the LED is on at one
direction, it shows good.

Check whether there
is anything (or Mylar)

on the key

N

Check whether the

LED of the K/B is
weakly welded or

broken

N

Check whether the

connection of CN601

&K/B FPC is OK,FPC is

void-welded

Y

Check whether there is

any pin of the connector

‘CN601’ ( M/B &K/B)

broken

N

Y

Y

N

Y

Clean or wipe off

Re-weld or

change the LED

Reassemble the K/B

Or change the FPC

Change CN601

the thing

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F

25

Innovating Customer Value

F

Check whether the

resistor beside th e

LED is broken

N

Check whether the

voltage at R620 is at

the high level(1V))

N

Change the CPU

Of the main module

OK

Y

Y

Change the resistor

Check R620,

R619,Q602

Inventec Confidential

26

¾Key NG

Innovating Customer Value

KEY NG

Check whether there is

anything oxidized or

smudge on the key pad

N

Check whether the

metal dome is oxidized

or broken

N

Check whether the

connection of CN601

&K/B FPC is OK,FPC

is void-welded

Y

Check whether there is

any pin of the connector

‘CN601’ ( M/B &K/B)

broken

N

Y

cleaning the key pad

With YC336

Y

N

Y

Change the

metal dome

Reassemble the K/B

Or change the FPC

Change CN601

Inventec Confidential

G

27

Innovating Customer Value

G

Check whether the

side-key is NG

N

Check whether there

is anyone broken of

D605-D618

N

Change the CPU

Of the main module

OK

Y

Chang the side-key FPC

Or the side-key metal dome

Y

Change the defective

Inventec Confidential

28

¾No ring

Innovating Customer Value

No ring

Checking method：testing
the resistance of the SPK
by Multimeter, gearing to
the resistance, the
resistance of it is 8ohm
normally

D/L the latest edition,

Check whether it is OK

N

Check whether the

SPK is void-welded

or broken

N

Check whether it

has an output

voltage of 1.8V at

U404 pin5,8

N

Check whether is has

an output voltage of

1.8V at U404 pin3,4

Y

Y

Y

Y

N

Check L405,L406

OK

Re-weld or

change the SPK

Check R422,R421,

R431,C421,C431

Inventec Confidential

H

29

Innovating Customer Value

H

Check whether the

voltage at U404 pin1 is

at the high level

N

Check whether

R423(20K) is broken

N

Change the CPU

Of the main module

OK

Y

Y

Change U404

Change R423

Inventec Confidential

30

Innovating Customer Value

Inventec Confidential

31

¾No receiving voice

Innovating Customer Value

No receiving voice

Checking method：testing
the resistance of the REC
by multimeter, gearing to
the resistance, the
resistance of it is 30ohm
around

D/L the latest edition,

Check whether it is OK

N

Check whether the

REC is void- welded

or broken

N

Check whether

L412,L413 are broken

N

Change U407,U406,
U408,check whether

it is OK

Y

Y

Change the REC

Y

Check L412,L413

OK

Re-weld or

Inventec Confidential

N

Change the CPU

Of the main module

OK

32

Innovating Customer Value

Inventec Confidential

33

¾No sending voice or the voice is small

No sending voice

or a small voice

Innovating Customer Value

Checking method：
testing the resistance of
the MIC by multimeter,
gearing to the resistance,
the positive resistance of
it is 1K, the opposite is

0.8K around in general.

D/L the latest edition,

Check whether it is

OK

N

Check whether the MIC

rubber is broken or

displacement

N

Check whether the

MIC is weakly welded

or broken

N

Check whether there is

anyone broken of

R400,R432(1K),

R405,R406(1.5K)

Y

Y

Reassemble or change

Y

change the MIC

Y

Change the defective

OK

the MIC rubber

Re-weld or

Inventec Confidential

N

I

34

Innovating Customer Value

I

Check whether there is

anyone broken of

C402,C403,L401,L402

N

Change U400,U401,

check whether it is OK

N

Change the CPU

of the main module

OK

Y

Change the defective

Inventec Confidential

35

Innovating Customer Value

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36

¾No vibration

Innovating Customer Value

No vibration

Checking method：testing
the resistance of the motor
by multimeter, gearing to
the resistance, the
resistance of it is 22ohm in
general

D/L the latest edition,

Check whether it is OK

N

Check whether the

motor is locked by

displacement

N

Check whether the

motor is broken

N

Entering test mode,

Check whether it has an

voltage of 1V at R526

Y

Y

Y

Y

Change the motor

Check R533(1K),

OK

Reassemble

the motor

Q503,D500

Inventec Confidential

N

Change the CPU

Of the main module

OK

37

Innovating Customer Value

Inventec Confidential

38

¾Card inefficacy (Main module)

Innovating Customer Value

Card inefficacy

D/L the latest edition,

check whether it is OK

N

Check whether the
SIM card is broken

N

Check whether the

socket ‘J602’ is void-

welded or broken

N

Change U501,

Check whether it is OK

Y

Y

Change the SIM card

Y

Re-weld or

change J602

OK

Inventec Confidential

N

Change the CPU

Of the main module

OK

39

¾Card inefficacy (Sub-module)

Innovating Customer Value

Card inefficacy

D/L the latest edition,

check whether it is OK

N

Check whether the
SIM card is broken

N

Check whether the

socket ‘J601’ is void-

welded or broken

N

Check whether there

is anyone broken of

D619-D622

N

Y

Y

Y

Y

Change the

SIM card

Re-weld or

change J601

Change the defective

OK

Inventec Confidential

Change the CPU

Of the sub-module

OK

40

Innovating Customer Value

Inventec Confidential

41

¾Camera inefficacy

Innovating Customer Value

Camera NG

Check whether the

camera is broken

N

Check whether the

connector ‘CN701’ is

broken

N

Check whether U702

pin1 has an voltage of

2.8V,pin3 has 1.5V

Y

Check whether
R701,R703 are

broken

N

Y

Change the Camera

Y

N

Y

Change CN701

Check whether the

voltage at U702 pin4,6 is

the high level

Change R701,R703

Y

Change U702

更换主模CPU

Inventec Confidential

Change the CPU

Of the main module

OK

42

Innovating Customer Value

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43

Innovating Customer Value

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44

¾Bluetooth inefficacy

Innovating Customer Value

BT NG

D/L the latest edition,

check whether it is OK

N

Check whether the

BT antenna is

touched well

Y

Check whether

J301 is void-

welded or broken

N

Check whether

BPF301,L302 are void-

welded or broken

Y

N

Y

Y

Reassemble the

OK

antenna

Change J301

Change

BPF301,L302

Inventec Confidential

N

J

45

J

Enable the BT function,

check whether is has an

voltage of 2.8V at R525

Y

Innovating Customer Value

Change U501

N

N

Check whether
R525(0ohm) is

broken

Y

Change R525

Check whether

X301 has an output

frequency of 26M

Y

Change U301, check

whether it is OK

Change the CPU

Of the main module

OK

N

Change

X301，C309，C310

Inventec Confidential

46

Innovating Customer Value

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47

Innovating Customer Value

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48

Innovating Customer Value

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49

¾TF card inefficacy

Innovating Customer Value

TF NG

D/L the latest edition,

check whether it is OK

N

Check whether the

socket ‘J601’ is void-

welded or broken

N

Check whether it

has an voltage of

2.8V at R530

N

Change U501,

check whether it is

OK

Y

Y

N

OK

Change J601

Change R530

Inventec Confidential

N

Change the CPU

Of the main module

OK

50