Samsung SGH-E620 User manual

GSM TELEPHONE

SGH-E620

GSM TELEPHONE CONTENTS

1. Specification

2. Flow Chart of Troubleshooting

3. Exploded Views and Parts List

4. Electrical Parts List

5. Block Diagrams

6. PCB Diagrams

1. SGH-E620 Specification

1-1

1-1. GSM General Specification

GSM900

Phase 1

EGSM 900

Phase 2

DCS 1800

Phase 1 PCS1900

Freq. Band

[MHz]

Uplink/Downlink

890~915

935~960

880~915

925~960

1710~1785

1805~1880

1850~1910

1930~1990

ARFCN range 1~124 0~124 &

975~1023 512~885 512~810

Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz

Mod. Bit rate /

Bit Period

270.833kbps

3.692us

270.833kbps

3.692us

270.833kbps

3.692us

270.833kbps

3.692us

Time Slot

Period / 576.9us

4.615ms

576.9us

4.615ms

576.9us

4.615ms

576.9us

4.615ms

Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK

MS Power 33dBm~5dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm

Power Class 5pcl ~ 19pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl

Sensitivity -102dBm -102dBm -100dBm -100dBm

TDMA Mux 8 8 8 8

Cell radius 35Km 35Km 2Km 2Km

SGH-E620 Specification

1-2

Tx Power

control level PCS1900

030±3dBm

128±3dBm

226±3dBm

324±3dBm

422±3dBm

520±3dBm

618±3dBm

716±3dBm

814±3dBm

912±4dBm

10 10±4dBm

11 8±4dBm

12 6±4dBm

13 4±4dBm

14 2±5dBm

15 0±5dBm

1-2. GSM Tx Power Class

Tx Power

control level DCS1800

030±3dBm

128±3dBm

226±3dBm

324±3dBm

422±3dBm

520±3dBm

618±3dBm

716±3dBm

814±3dBm

912±4dBm

10 10±4dBm

11 8±4dBm

12 6±4dBm

13 4±4dBm

14 2±5dBm

15 0±5dBm

Tx Power

control level GSM900

533±3dBm

631±3dBm

729±3dBm

827±3dBm

925±3dBm

10 23±3dBm

11 21±3dBm

12 19±3dBm

13 17±3dBm

14 15±3dBm

15 13±3dBm

16 11±3dBm

17 9±3dBm

18 7±3dBm

19 5±3dBm

2. SGH-E620 Flow Chart of Troubleshooting

2-1

2-1. Power On

check the current

consumption more

than 100mA

Download again

'Power ON' does not work

Yes

END

Yes

Check the Initial Operation

Check U100

Yes

Check U100

pin A13 =

2.8V

No U100 pin

C12 = 1.8V

Yes

Charge the battery

Check the Voltage

of the Battery more

than 3.5V

check keypad

Check the pin J12

of U100 is more

than 2.8V

Check

"Power On"

key?

check U100 and C103

Yes 1

SGH-E620 Flow Chart of Troubleshooting

2-2

VCCA_2.8

910

334

VCCD_1.8

CN100

C110

VCCD_2.8

C115

VCCD_1.5

VBAT

C109

VCCB_2.8

A13

VLDO_4 B12

VLDO_5 B10

VLDO_6 A14

VLDO_7 C12

VRTC H11

VSIM K12

VEXT E14

VIB_DRV F15

VL4S_A A12

VL4S_B B11

VL5S_A D10

VL5S_B

VLDO_1 G11

VLDO_2 J12

VLDO_3

VDD12 J13

C11

VDD34

SIM_CLK K14

SIM_IO J11

SIM_RST K11

UP_CLK N9

UP_IO P10

UP_RST R10

VACC F14

VBAT E13

SCLK_PSC L8

SDI_PSC

SDO_PSC N7

RING_DRV F13

LED1_DRV G13

LED2_DRV G12

CH_BDRV E11

CH_ISEN F12

CH_RES D14

CSN_PSC

ADC_AUX1 E10

ADC_AUX2 D15

VRF_2.8

C108

C117

C107

C111

C114

C103

C119

C113

C116

C112

VBAT

VRTC_1.5

C118

C104

UP_CS

KEY_BACKLIGHT

UP_SDO

UP_SDI

UP_SCLK

DCS_TX_EN

GSM_TX_EN

SIMRST

SIMDATA

SIMCLK

SGH-E620 Flow Chart of Troubleshooting

2-3

2-2. Initial

END

Yes

Check the signal at

thepinC15ofU100is

"LOW" when the

phone is boot on

Initial Failure

Check pin4 of OSC200

Voltage is 2.8V ?

Check OSC200

L708,pin A13 of U100,

OSC700,C113

Yes

Check pin10 of U302

Voltage is 2.5V?

Check or Change U301

Yes

Check pin3 of OSC700,

Frequency is 13MHz? Check or change OSC700

Check OSC300 is

working?

Check the soldered status of U302,

U200

SGH-E620 Flow Chart of Troubleshooting

2-4

SGH-E620 Flow Chart of Troubleshooting

2-5

OSC200

C215

J16

PIO47

U18

PIO33

PIO34 R14

IRQ1 M16

M19

IRQ2

IRQ3 P17

P18

IRQ4

C216

USB_DET

BT_POW_EN

SPK_ON

5N/C

N/C 8

N/C

1VIN VOUT1 10

VOUT2EN1

3EN2

GND 6

12 13

14 15

U302

CBYP

C316

CAM_1.8

C314

R309

VBAT

C313

C315

CAM_2.5

C317

CAMPWR_EN

R110

VBAT

VREF A10

RTC_ALMN H10

CREF

ADC_AUX1 E10

ADC_AUX2 D15

R109

C120 C121

PWR_KEEP

RTCALARM

RST

INTRQ

SGH-E620 Flow Chart of Troubleshooting

2-6

C312

R306

XIN

XOUT A1

NC 2

C310

OSC300

R702

BUFFIN

BUFFOUT

GND

OUT VCC

VCONT

OSC700

C709

10NF

16V

R705

R701

L708

C706

C704

C707

100PF

50V

C708

R704

R703

C711

VRF_2.8

C705

AFC

CLK13M_RF CLK13M_TR

CLK13M_MC

CLK13M_NEC

SGH-E620 Flow Chart of Troubleshooting

2-7

2-3. Sim Part

* Test with Sim

Check the pin 1 of

Phone can't access SIM card

Check the SIM

connector's (CN100)

connection to SIM

card

Check the circuit related to U100

Resolder or change CN100

END

Yes

Check the circuit

around CN100 input

circuitry

Check the related circuit of CN100

Yes

Check the circuit

around U200 output

and voltage supply

circuitty

Check the related circuit of U200 and

U100

Yes

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