Samsung SGH-E105 Service Manual

GSM TELEPHONE

SGH-E105

Manual

SERVICE

GSM TELEPHONE CONTENTS

1. Specification

2. Exploded Views and Parts List

3. Electrical Parts List

4. Flow Chart of Troubleshooting

5. Block Diagrams

6. PCB Diagrams

2. SGH-E105 Exploded View and its Parts list

1. Cellular phone Exploded View

10

1

2

11

18

19

12

13

14

15

16

17

3

4

5

7

8

9

6

20

21

22

2-1

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5. SGH-E105 Block Diagrams

1. RF Solution Block Diagram

Antenna

GSM:925MHz~960MHz

RF

FILTER

PCS:1930MHz~1990MHz

FEM

CSP1093

L

PGA

N

A

PGA

ADC

ADC

CHANNEL

FILTER

PGA

PGA

I

DAC

Q

DAC

TRIDENT

DSP16000

100KHz

1/2

SI4201

SI4200

SERIAL DATA
INTERFACE

BASE
BAND

GSM:890MHz~915MHz

PAM

PCS:1850MHz~1910MHz

TX VCO

RF

PLL

DET

SI4133T

IF

PLL

CLK

I

ARM7TDMI

Q

TCVCXO

13MHz

AFC

TXPOWER

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UI

AUDIO

SGH-E105 Block Diagrams

2. Base Band Solution Block Diagram

IRDA

RS232

GPIO

SIM I/O

X-TAL

32.768 KHz

ARM

JTAG/ICE

TRIDENT

ACC

PPI
(Programmable
Peripheral I/O)

SMART

CARD

RTC

JTAG/ICE

POWER

(DC/DC, CHARGER)

DSP16000

ARM7TDMI

EMI

IO
RWN
AB(8:0)
DB(15:0)
INT1
IRQx
PAx
RSTB

DSPJTAG

LCD
KEYBOARD

X-TAL
13MHz

IO
RWN
AB(8:0)
DB(15:0)
INT1
IRQx
PAx
RSTB

JTAG

CSP1093

<RF DRIVER>

TX I/Q
RX I/Q
TXP
SERCK
SERLE
SERDA
OCTL

DAICK
DAIRN
DAIDO
DAIDI

DAI

TXIP
TXIN
TXQP
TXQN
RXIP
RXIN
RXQP
RXQN
SERCK
SERLE
SERDA
RXOVL
TXP
OCTL

RF SOLUTION

-RFIC

-PAM

MCP

128M FLASH

16M SRAM

Memory Part

AUDIO PART

AUDIO

LCD

MOTOR

B'D to B'D Connector

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4. SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams

1.Baseband

1. Power ON

'Power On' does not

work

Check the current

consumtion more than

100mA

YES

Check the

Vbat(battery+O)

Voltage more than

3.3V

YES

Check the pin

15 of U100 is more

than 2.8V

YES

U100 pin 46,39

=2.8V

NO

NO

NO

NO

Download again

Charge the Battery

Check U100 and C113

Check C114 and C116

YES

U100 pin 13

=1.8V

YES

Checktheclocksignal

at

pin4 of U800

Freq=13MHz ?

Vrms°√300mV ?

Vpp is around

900mVpp

YES

'Power On' does not

work

END

NO

NO

Check C112

Check the clock generation circuit

(related to OSC801 and U800)

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SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams

2. Initial

Initial Failure

Check the signal at the

pin28ofU100is

"High" when the phone

is boot on

YES

Check the pin 22 of

U100 is "High"

YES

Check the pin 4 of

OSC801 is around 2.8V

YES

Check and resolder LCD connector CN200

if there is solder bridhe between the pins

YES

END

NO

NO

NO

Check U100

Check the U700

Check the soldered status of

OSC801, R803, U100

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3. Sim Part

SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams

Phone can't access SIM card

Check the pin 1 of CN100.

Voltage = 3V?

YES

Check the SIM

connector's (CN100)

connector's to SIM card

YES

Check the circuit around CN100 input

circuitry

YES

Check the circuit around U601 output

and voltage supply circuitry

YES

END

NO

NO

NO

NO

Check the circuit related to

resolder or change CN100

Check the related circuit of

Check the related circuit of

U100

CN100

U601 and U100

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