LG B2050 Service Manual Download Page 98

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BOOT MODE

NO.

BYPASS

Name

2004.

USB BOOT EXT CLOCK

2012

CRST

CHRDACREF

DRAWING

MODEL

DRAWING

KIM H.J.

0.1uF

LG Electronics Inc.

2004.

NAME

AD6537B

AD6535

12.08

LGIC(42)-A-5505-10:01

USB BOOT INT CLOCK

NC_R6

Date

CLOSE TO AD6537B

IBIAS

B2050

KIM B.Y.

1.2M

UART BOOT

Notice No.

REFPWR

Designer

LG Electronics Inc.

Iss.

Hermes 6527 ,Typhoon 6537B

Ver.1.0

0.01uF

12.08

LEE S.Y.

510

GPIO_55

Sign & Name

Section

Checked

GPIO_56

GUIDE HOLE

2004.

CHGOSC

(1608)

Approved

Sheet/Sheets

Date

C130
NA

1/5

TP121

OJ3

VCHARGE

OJ1

1V8_VCORE

AVLC14S02050

VA332

100K

R131

R130
100K

C116

C138

OJ2

C120
47p

TP110

39p

C140

C133

39p

AVLC14S02050

VA333

C136

39p

C108
47n

22u

1V8_VCORE

2V8_VMEM

C109

C115

2V75_VVCXO

4.7K

R117

2V8_VMEM

VBAT

32.768KHz

X100

MC-146_12.5pF

C132

39p

C143

TPCF8102

Q100

VMEM3

VMEM4

VMEM5

N11

VSIM

VSSRTC

VSSUSB

P10

VCHARGE

VCC5

VCC6

VCC7

M14

VCC8

P14

VDDRTC

VDDUSB

VEXT1-1

D16

F12

VEXT1-2

F14

VEXT1-3

VEXT1-4

K11

VEXT1-5

R15

T12

VEXT1-6

C11

VEXT2-1

VINT

VMEM1

VMEM2

OSCIN

OSCOUT

PWRON

T10

SIMCLK

SIMDATAIO

V10

USC0

N18

USC1

N14

USC2

M16
N13

USC3
USC4

M18
L16

USC5

M13

USC6

VCC1

C12

VCC2

VCC3

J11

VCC4

E14

KEYPADROW1
KEYPADROW2

A16

KEYPADROW3

E13

KEYPADROW4

A15

NADV

NAUXCS1

NGPCS1

NHWR

NLWR

NRAMCS1
NRAMCS2

NRD

NRESET

NROMCS1

NWAIT

NWE

GPO_23_LCD_BACKLIGHT

D18

GPO_29_ABBRESET

GPO_3

T13
T14

GPO_4

GPO_5_ARSM

GPO_6_ATSM

GPO_7

T15

GPO_8

V16
V17

GPO_9

JTAGEN

T11

KEYPADCOL0

F13
A14

KEYPADCOL1
KEYPADCOL2

C14
C13

KEYPADCOL3
KEYPADCOL4

A13

D15

KEYPADROW0

J18

GPIO_6
GPIO_7

H16

J14

GPIO_8

H18

GPIO_9

GPO_0_RXON

GPO_10

V18
R16

GPO_11

T16

GPO_16
GPO_17

T18

GPO_18

P16

GPO_19

U18

GPO_1_TXON

GPO_2

V14

GPO_20

R18

GPO_21

P18

G13

GPO_22_KEY_BACKLIGHT

GPIO_42_NMAIN_LCD_CS

GPIO_43_NSUB_LCD_CS

GPIO_44_NROMCS2

GPIO_45

GPIO_46

GPIO_47_SIM_VSEL

P11

GPIO_48_ABB_IRQ

GPIO_49

J10

GPIO_5

J16

E10

GPIO_50
GPIO_51

H10

GPIO_52

C10
F10

GPIO_53

A10

GPIO_54

GPIO_55

E11
A12

GPIO_56

GPIO_20_TDI

P12
V13

GPIO_21_TDO

GPIO_22

A11

GPIO_23_SIM_RESET

GPIO_24_SIM_EN

V11

K16

GPIO_2_NIRDA_EN

GPIO_3

K18

E16

GPIO_33_DEBUG_RX
GPIO_34_DEBUG_TX

C18

B18

GPIO_35

A18

GPIO_36
GPIO_37

C16

GPIO_38

A17
C15

GPIO_39

K14

GPIO_4

GPIO_40

H11

GND6

GND7

H13

GND8

GND9

K10

GPIO_0_IRDA_TX

L18

GPIO_10

G16

GPIO_11

J13

G18

GPIO_12

H14

GPIO_13
GPIO_14

G14

GPIO_15

F16
F18

GPIO_16

E18

GPIO_17

GPIO_18_TCK

L11
V12

GPIO_19_TMS

GPIO_1_IRDA_RX

L14

DATA9

L10

DMINUS

DPLUS

GND1

K13

GND10

L13

GND11

GND12

GND13

GND14

N12

N16

GND15

GND16

GND17

V15

E12

GND2

GND3

F11

GND4

GND5

CSFS

DATA0

DATA1

DATA10
DATA11

DATA12

R1
N7

DATA13

DATA14

DATA15

DATA2

DATA3

DATA4

DATA5

DATA6
DATA7

N1
P3

DATA8

ADD8

ADD9

ASDI

B1
A1

ASDO

ASFS

BSDI

BSDO

BSIFS

BSOFS

BURSTCLK

CLKIN

N10

CLKON

P13

CLKOUT

CLKOUT_GATE

CSDI

CSDO

ADD14

ADD15
ADD16

J8
J3

ADD17

ADD18
ADD19

ADD2

ADD20

ADD21

K3
K1

ADD22
ADD23

ADD3
ADD4

D1
F5

ADD5

ADD6
ADD7

U100

AD6527ABC

ADD0

ADD1

ADD10

H8
F1

ADD11

ADD12
ADD13

10K

39p

C135

R118

VBAT

VREF

TP102

C131

D101

KDS121E

C101
1u

1V8_VRTC

_F_WE

JTAG1

GND

JTAGEN

RPWON

TCK

TDI

TDO_0

TDO_1

TMS

VBAT

TP101

C142
1u

TP119

C144
39p

C122

BAT100

C119

0.082u

VBAT

OJ4

C121

TP104

C139
39p

2V8_VEXT

2V75_VABB

C111
47n

47n

C100

2V8_VEXT

100

R105

82K

R112

0.2

R108

2V85_VSIM

C114

C123
100p

C105
1u

C124
100p

R114

4.7

VBAT

C117

2.2u

C112

C134

39p

TP107

C128

1000p

C129

2V8_VMEM

OJ5

2V8_VEXT

47n

C104

TP114

C137

4.7

R111

2V5_VMIC

TP100

39p

C141

27p

1V8_VRTC

C149

C118

10K

R104

TP106

TP122

R140

100

C102

47n

C107

TP116

2V8_VMEM

TP120

C127
10u

CUS02

2V85_VSIM

C103
1u

D100

22p

TP103

C110

C113

TP108

VCHG

VCORE1

VCORE2

VCXOEN

VEXT1

VEXT2

VMEM1
VMEM2

VMEMSEL

VMIC

N16

VRTC

VSIM

D16

VVCXO

TEMP2

TMS

TXON

H16

VABB

VBAT1

VBAT1-1

C15

VBAT2

VBAT2-1

G15

VBAT2-2

H15

VBAT3

VBAT3-1

VBAT3-2

VBAT4

VBAT5

VBATSENSE

VBAT_NET

A14

A15

B15

REF

REFBB

A10

REFCHG

D15

REFOUT

B11

RESET

RXON

SGND1

SGND2

SPWR1

R10

SPWR2

T10

TCK

TDI

TDO

TEMP1

MCLK

MCLKEN

NC_A16

A16

NC_B5

NC_B7

NC_C16

C16

NC_E15

E15

E16

NC_E16
NC_F16

F16

G16

NC_G16

NC_R1

NC_R12

R12

NC_R6

NC_T12

T12

NC_T15

T15

B12

DBBON

DGND

GATEDRIVE

GND_NET1

GND_NET2

F15

GPI

A13

INT

A12

ISENSE

KEYON

T14

T13

KEYOUT

N15

LGND

LIGHT1

L16

M15

LIGHT2
LIGHT3

M16

K16

AOUT3N

J16

AOUT3P

ASDI

ASDO

ASFS

ASM

B10

AUXADC1

AUXADC2

BATTYPE

BSDI

BSDO

BSIFS

BSOFS

CSDI

CSDO

CSFS

AGND1

B16

AGND2

A11

AGND3

L15

AGND4

T16

AIN1N

R16

AIN1P

P16

R15

AIN2N

P15

AIN2P

R13

AIN3L
AIN3R

R14

K15

AOUT1N

AOUT1P

J15

AOUT2N1

AOUT2N2

R11

AOUT2P1

T11

AOUT2P2

AGND029

L10

AGND03

AGND030

L11

AGND031

L12

AGND032

AGND033

AGND034

AGND035

M10

M11

AGND036

AGND037

M12

AGND04

AGND05

E10

AGND06

E11

E12

AGND07

AGND08

AGND09

AGND014

AGND015

AGND016

G10

AGND017

AGND018

G11

G12

AGND019

AGND02

AGND020

AGND021

AGND022

AGND023

K10

AGND024

K11

AGND025

K12

AGND026

AGND027

AGND028

U101

AD6537BABC

ABBRESET

AFCDAC

B14

AGND01

B13

AGND010

F10

AGND011

AGND012

F11

F12

AGND013

TP112

100K

R113

330

R109

R110

10M

TP105

C106

RADIO_RSSI

BATT_TEMP

RADIO_STO

AFC

RADIO_VOL_CLK

RADIO_VOL_CTRL

BATT_EPROM

RADIO_AMP_SHDN

JTAGEN

TCK

TDO_1

TMS

TDO_0

RINGTONE

RPWRON

HEADSET_SPK_P
HEADSET_SPK_N

MIC_P
MIC_N
HEADSET_MIC_P

HEADSET_MIC_N

TCK

TDO_1

TDO_0

TMS

CLKON

TX_RAMP

KEY_ROW0

POWERKEY

RADIO_DETECT

RADIO_SCL

HOOK_DETECT

SPK_SEL

RADIO_SEL

AMP_EN

ANT_SW3

LCD_DIM_CTRL

SPK_RADIO_SEL

RPWRON

ONNOFF

REC_N

_WAIT

REC_P

JTAGEN

PRECHARGE

PWRON

ADD02

ADD19

ADD18

ADD17

ADD16

ADD15

ADD14

ADD13

ADD12

ADD11

ADD10

ADD01

ADD00

RF_PWR_DWN

DATA10

DATA01

DATA00

CLKON

BURSTCLK

ADD09

ADD08

ADD07

ADD06

ADD05

ADD04

ADD03

ADD23

ADD22

ADD21

ADD20

DSR

_F_WP

DATA09

DATA08

DATA07

DATA06

DATA05

DATA04

DATA03

DATA02

DATA15

DATA14

DATA13

DATA12

DATA11

PA_BAND

PA_EN

ANT_SW2

RADIO_SDA

JACK_DETECT

_ROM_CS2

_LCD_CS

RINGTONE

_MIDI_IRQ

DEBUG_TX

DEBUG_RX

SIM_RST

TDI

LCD_ID

_LCD_RESET

_MIDI_RESET

_ADV

KEY_ROW4

KEY_ROW3

KEY_ROW2

KEY_ROW1

KEY_ROW0

KEY_COL4

KEY_COL3

KEY_COL2

KEY_COL1

KEY_COL0

ANT_SW1

LCD_BL_EN

S_CLK

S_DATA

S_EN

USC4

USC3

USC2

USC1

USC0

SIM_DATA

SIM_CLK

_WR

_ROM_CS1

_RESET

_RD

_RAM_CS

_LBS
_UBS

_MIDI_CS

13MHZ

_RESET

RPWRON

TDI

_WR

USC6

USC5

CIRCUIT DIAGRAM

Summary of Contents for B2050

Page 1: ...l a u n a M e c i v r e S l e d o M B2050 Service Manual B2050 P N MMBD0049101 Date April 2005 Issue 1 0 B2050Cover_3 3 0419 2005 4 20 1 7 PM Page 2 ...

Page 2: ...ard interface trouble 74 4 9 Earphone Trouble 76 4 10 Key Backlight Trouble 78 4 11 Receiver Trouble 80 4 12 Microphone Trouble 82 4 13 RTC Trouble 84 4 14 Indication LED Trouble 86 5 DOWNLOAD AND CALIBRATION 88 5 1 Download 88 5 2 Calibration 93 6 BLOCK DIAGRAM 94 7 CIRCUIT DIAGRAM 97 8 PCB LAYOUT 102 9 ENGINEERING MODE 105 9 1 BB Test MENU 1 106 9 2 RF Test MENU 2 107 9 3 MF mode MENU 3 108 9 4 ...

Page 3: ...cturer will not be responsible for any charges that result from such unauthorized use B Incidence of Harm If a telephone company determines that the equipment provided tocustomer is faulty and possi bly causing harm or interruption in service to the telephone network it should disconnect tele phone service until repair can be done A telephone company may temporarily disconnect ser vice as long as ...

Page 4: ...ipment medical equipment etc Interference from unsuppressed engines or electric motors may cause problems H Electrostatic Sensitive Devices ATTENTION Boards which contain Electrostatic Sensitive Device ESD are indicated by the sign Following information is ESD handling Service personnel should ground themselves by using a wrist strap when exchange systemboards When repairs are made to a system boa...

Page 5: ...Bm dB relative to 1 milli watt DSP Digital Signal Processing ESD Electrostatic Discharge FPCB Flexible Printed Circuit Board GMSK Gaussian Minimum Shift Keying GPIB General Purpose Interface Bus GSM Global System for Mobile Communications IPUI International Portable User Identity IF Intermediate Frequency LCD Liquid Crystal Display LDO Low Drop Output LED Light Emitting Diode OPLL Offset Phase Loc...

Page 6: ...T Universal Asynchronous Receiver Transmitter VCO Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator WAP Wireless Application Protocol SAW Surface Acoustic Wave PAM Power Amplifier Module PCB Printed Circuit Board PGA Programmable Gain Amplifier PLL Phase Locked Loop PSTN Public Switched Telephone Network RF Radio Frequency RLR Receiving Loudness Rating...

Page 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...

Page 8: ... 7 2 PERFORMANCE ...

Page 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...

Page 10: ... 9 2 PERFORMANCE ...

Page 11: ... 10 2 PERFORMANCE ...

Page 12: ... 11 2 PERFORMANCE ...

Page 13: ... 12 2 PERFORMANCE ...

Page 14: ...ransceiver is the integrated RF front end for multi band GSM GPRS digital cellularhand sets and wireless data modems The integrated solution eliminates the IF SAW filter externallow noise amplifier LNAs for three bands transmit and RF voltage controlled oscillator VCOmodules and other discrete components found in conventional designs Figure 3 1 RECEIVER FUNCTIONAL BLOCK DIAGRAM H C T I W S A N N E...

Page 15: ...l the Rx and Tx paths And the inputsignals VC1 VC2 VC3 of a FL501 are directly con nected to basebandcontroller to switch either Tx or Rx path on The logic and current is given below Table 3 1 Three differential input LNAsare integrated in SI4205 The GSM input supports the GSM850 869 849 MHz or E GSM 900 925 960MHz bands The DCS input supports theDCS 1800 1805 1880 MHz band The PCS input supports ...

Page 16: ... perform channel selection to remove blocking and reference interference signals The selectivity setting CSEL 0 or a low selectivity setting CSEL 1 The low selectivity filter has a flatter group channelization filter is in the baseband chip After channel selection the digital output is scaled with a digital PGA which is controlled with the DGAIN 5 0 bits in register 05h The amplified digital outpu...

Page 17: ...nd software is able to cancel out differential DC offsets in the I Q baseband signals caused by imperfections in the D A converters The Tx Modulator implements a quadrature modulator A quadrature mixer upconverts the dif ferential in phase TXIP TXIN and quadrature TXQP TXQN signals with the IFLO to generate a SSB IF signal that is filtered and used as the reference input to the OPLL The IFLO frequ...

Page 18: ... used for the GSM 850 and E GSM 900 bands and low side injection is used for the DCS 1800 and PCS 1900 bands The I and Q signals are automatically swapped when switching bands Additionally the SWAP bit in register 03h can be used to manually exchange the I and Qsignals Low pass filters before the OPLL phase detector reduce the harmonic content of the quadra turemodulator and feedback mixer outputs...

Page 19: ...RF out put frequencies are set by programming the N Divider registers NRF1 NRF2and NIF Programming the N Divider register for either RF1 or RF2 automatically selects theproper VCO The output frequency of each PLL is as follows The DIV2 bit in register 31h controls a programmable divider at the XIN pin to allow either a 13 or 26 MHz reference frequency For receive mode the RF1 PLL phase detector up...

Page 20: ...applications in the 824MHz to 849MHz 880MHz to 915MHz 1710MHz to 1785MHz and 1850MHz to 1910MHz bands The RF3166 incorporates RFMD s latest VBATT tracking circuit which monitors battery voltage and prevents the power control loop From reaching saturation The VBATT tracking circuit eliminates the need to monitor battery voltage thereby minimizing switching transients The RF3166 requires no external...

Page 21: ...or RF Circuits RF LDO U702 Two regulators are used for RF circuits One is MIC5255 U702 and the other is one port of AD6537B U101 MIC5255 U702 supplies power to transceiver SI4205 U500 One port of AD6537B supplies power to VCTCXO X500 Figure 3 6 VCTCXO CIRCUIT DIAGRAM APC X500 2V75_VVCXO 13MHz C536 22u VCC ONG OUT VCONT 100 R514 1 2 3 4 C538 1000p 15K R516 Table 3 2 RF POWER SUPPLIERS Voltage Power...

Page 22: ...3 TECHNICAL BRIEF 21 VBAT CLKON C533 10u IN U702 MIC5255 85BM5 GNO EN OUT BYP 1 2 3 4 C734 C534 RF2VBS 5 10u 0 01u 1608 Table 3 7 RF LDO CIRCUIT DIAGRAM ...

Page 23: ...Power Management U S C 32KHz CSDI CSFS CSDO BSDI BSIFS BSDO BSOFS ASDI ASDO ASFS MCLK RESET VCXOEN MCLKEN DRV OUT LNA IN RADIO AD6534 AGC Synthesizer VCO 13 26MHz JTAG VOSC AFC RAMP RF Timing I Q Interface VOICE i f Buzzer Universal System Connector USC Figure 3 8 SYSTEM INTERCONNECTION OF AD6527 EXTERNAL INTERFACE Parallel JTAG HSL GPIO Enhaoced Generic serial port A Generic serial port B Generic...

Page 24: ...t and Page Mode Flash Support for Pseudo SRAM Ciphering module for GPRS supporting GAE1 and GAE2 encryption algorithms Parallel and Serial Display Interface 8 x 8 Keypad Interface Four independent programmable backlight plus One Service Light 1 8V and 3 0V 64 kbps SIM interface Universal System Connector Interface Slow Medium and Fast IrDA transceiver interface Enhanced Generic Serial Port Dedicat...

Page 25: ... LCD_RESET _WR 2V8_VMEM LCD_ID LCD_BL_EN Table 3 3 LCD CONTRON SIGNALS DISCRIPTION Description _LCD_CS LCD_DIM_CTRL LCD_RESET GPIO 15 _WR 2V8_VMEM LCD_ID GPIO 16 LCD_BL_EN Signals MAIN LCD driver chip enable MAIN LCD driver IC has own CS pin It controls dimming mode of LCD module GPIO_5 It determines the maker of LCD module It controls back light of LCD module GPO_23 This pin resets LCD module Thi...

Page 26: ...F LCD BACKLIGHT LED CONTROL C RF interface The AD6527 control RF parts through PA_BAND ANT_SW1 ANT_SW2 ANT_SW2 CLKON PA_EN S_EN S_DATA S_CLK RF_PWR_DWN Signal Description PA_BAND GPO 17 PAM Band Select ANT_SW3 GPO 11 Antenna switch Band Select PA_EN GPO 16 PAM Enable Disable S_DATA GPO 20 Serial Data to PLL S_CLK GPO 21 Clock to PLL S_EN GPO 19 PLL Enable Disable RF_PWR_DWN GPO 4 Power down Input ...

Page 27: ...ds data to SIM card This model can support only 3 0 volt interface SIM card Clock 3 25MHz frequency Reset SIM block Table 3 6 SIM CONTRON SIGNALS DISCRIPTION Figure 3 9 SIM Interface of AD6527 1 2 3 7 8 4 5 6 10 9 SIM_DATA 2V85_VSIM OND1 R336 20K R337 R338 J300 VPP IO OND5 OND4 VCC RST CLK OND2 OND3 2V85_VSIM SIM_RST SIM_CLK C315 C314 NA 0 0 NA 220n 1000p C316 C317 E Key interface Include 5 column...

Page 28: ...system supports all the GSM terminal software including the layer 1 2 and 3of the GSM protocol stack the MMI and applications software such as data services test and mainte nance It is tightly associated with on chip system SRAM and also includes boot ROM memory with a small dedicated routine to facilitate the initialization of the external Flash Memory via code download using the on chip serial i...

Page 29: ...rollers T R O P S C Ram GMSK Filter Filter Filter Filter Tone ADC ADC ADC DAC DAC ADC DAC DAC DAC T R O P S B T R O P S A h c t i w S Mic Headphones or Headset Battery Charger 8 Voltage Regulators Othello LEDs Crystal Varactor VCORE 1 8 V 80mA VMEM 1 8 or 2 8V 150mA VEXT 2 8V 170mA VSIM 1 8 or 2 85V 20mA VRTC 1 8V 200µA VABB VMIC 2 5V 1mA VVCXO 2 75V 10mA ...

Page 30: ...l Transmit DACs and Filters Power Ramping DAC 2 BB Receive section I channel Q channel Receive ADCs and Filters 3 Auxiliary section Voltage Reference Automatic Frequency Control DAC Auxiliary ADC Light Controllers 4 Audio Section 8 kHz 16 kHz Voiceband Codec 48 kHz Monophonic DAC Power Amplifiers 5 Power Management section Voltage Regulators Battery Charger Battery Protection6 Digital Processor se...

Page 31: ...SDO Baseband Serial Port Control Serial Port GMSK Modulator Ramp RAM PGA PGA PGA Tx DAC Tx DAC Ramp DAC SC Filter SC Filter SC Filter Active CT Filter Active CT Filter Active CT Filter Figure 3 12 AD6537B BASEBAND TRANSMIT SECTION 3 6 2 Baseband Transmit Section 1 This section consists of two identical ADC channels that process basebandin phase I and quadrature Q input signals IP IN QP QN AD6537B ...

Page 32: ...and Voltage Reference IDAC 10 bits The Auxiliary ADC provides Two differential inputs for temperature sensing A differential input for the battery charger current sensor Figure 3 14 AD6537B AUXILIARY SECTION CSFS CSDI CSDO AD6537B Control Serial Port AFC DAC Voltage Reference REFTXCM Aux ADC AFCDAC REFBB REFOUT REF REFCHG TEMP1 TEMP2 AUXADC1 AUXADC2 AIN1P AIN2P BATTYPE ISENSE VBATSENSE LIGHT1 LIGH...

Page 33: ...o signal to speaker B2050 uses differential configuration 3 This section provides an audio codec with a digital to analog converter and an analog to digital converter a ring tone volume controller a microphone interface and multi pleanalog input and output channels 4 It interconnects with external devices like main microphone main receiver and headset The descriptions of audio port used in B2050 a...

Page 34: ... AD6537B Control Serial Port CSFS CSDI CSDO 1 8V 80mA VCORE 1 8 or 2 8V 150mA VMEM VEXT 2 8V 170mA VSIM 1 8 or 2 85V 20mA 1 8V 20 A VRTC VCXOEN DBBON RESET VABB VMIC 2 5V 1mA VVCXO 2 75V 10mA VCHG GATEDRIVE BATTYPE ISENSE KEYON KEYOUT Battery Charer Didital Core LDO Regulator Regulator Control Power on Reset Generator Memory Interface LDO Regulator External Interface LDO Regulator SIM Interface LD...

Page 35: ... or 1 6V high VCORE 1 6V low VCORE 1 6V low VEXT 2 6V VCORE VMEM VEXT VSIM VVCXO 2 LDO Block 1 There are 8 LDOsin the AD6537B VCORE supplies Digital basebandProcessor core and AD6537B digital core 1 8V 80mA VMEM supplies external memory and the interface to the external memory on the digital baseband processor 1 8V or 2 8V 150mA VEXT supplies Radio digital interface and high voltage interface 2 8V...

Page 36: ...in hardware 2 Charging Process Check charger is inserted or not If AD6537B detects that Charger is inserted the CC CV charging starts Exception When battery voltage is lower than 3 2V the precharge low current charge mode starts firstly And the battery voltage reach to 3 2V the CC CV charging starts 3 Pins used for charging VCHG charger supply GATEDRIVE charge DAC output ISENSE charge current sens...

Page 37: ...A E H N _ K P S _ T E S D A E H P _ C I M N _ C I M P _ C I M _ T E S D A E H N _ C I M _ T E S D A E H N _ C E R P _ C E R B 7 3 5 6 D A O T E S O L C p 9 3 0 4 1 C 3 3 1 C p 9 3 6 3 1 C p 9 3 p 9 3 3 4 1 C p 9 3 5 3 1 C A N 1 3 1 C 4 4 1 C p 9 3 9 3 1 C p 9 3 4 1 1 R 7 4 4 3 1 C p 9 3 7 4 1 1 1 R p 9 3 1 4 1 C SGND1 SGND2 R8 2 1 R _ C N 2 1 R DGND M2 2 C I P G N15 LGND 6 1 K N 3 T U O A 6 1 J P ...

Page 38: ... 0 1 R 1 2 1 0 2 E G R A H C V 6 5 3 R K 7 4 K 5 1 5 5 3 R 1 4 1 0 3 Q 0 1 1 T 9 X M I 2 5 6 3 T A B V u 1 0 4 2 3 C u 1 0 5 2 3 C 5 8 5 5 C S 2 1 0 4 Q 2 3 1 5 1 2 5 3 R 10K R357 K 1 3 5 3 R R358 10K R350 750 6 0 3 D L R359 20 T A B V E G R A H C E R P NORMAL CHARGING Trickle CHARGING Figure 3 21 CIRCUIT FOR BATTERY CHARGING AT AD6537B In order to reduce time for trickle charging additional circu...

Page 39: ... P G 8 1 A 6 3 _ O I P G 7 3 _ O I P G 6 1 C 8 3 _ O I P G 7 1 A 5 1 C 9 3 _ O I P G 4 1 K 4 _ O I P G 5 K 0 4 _ O I P G X T _ A D R I _ 0 _ O I P G 8 1 L 0 1 _ O I P G 6 1 G 1 1 _ O I P G 3 1 J 8 1 G 2 1 _ O I P G 4 1 H 3 1 _ O I P G 4 1 _ O I P G 4 1 G 5 1 _ O I P G 6 1 F 8 1 F 6 1 _ O I P G 8 1 E 7 1 _ O I P G X R _ A D R I _ 1 _ O I P G 4 1 L K L C T S R U B 4 V N I K L C 0 1 N N O K L C 3 1 P...

Page 40: ... 5 C 5 A 2 5 R E T L I F 1 6 R E T L I F 6 C 6 A 2 6 R E T L I F B1 G1 B2 G2 G3 B3 M E M V _ 8 V 2 A 6 0 3 I M E P S C 1 0 4 L F V 1 A 2 1 R E T L I F 1 1 R E T L I F 1 C 2 A 2 2 R E T L I F 1 2 R E T L I F 2 C 3 A V 1 1 R E T L I F 1 C 1 A 2 1 R E T L I F 1 2 R E T L I F 2 C 2 A 2 2 R E T L I F 1 3 R E T L I F 3 A 2 3 R E T L I F 3 C 1 4 R E T L I F 4 C 4 A 2 4 R E T L I F 5 A 2 5 R E T L I F 1 5...

Page 41: ...Y E K SP301 SP315 SP310 2 0 3 3 R 0 8 6 SP300 R L C SP313 0 8 6 0 4 3 R 0 8 6 5 3 3 R P R A H S D N E 9 8 T H G I R SP316 0 D N E S 1 8 0 3 A V 0 5 0 2 0 S 4 1 C L V A L E S 1 0 3 R K 0 1 SP309 SP304 0 5 0 2 0 S 4 1 C L V A 7 0 3 A V 6 0 3 A V 0 5 0 2 0 S 4 1 C L V A 5 P U R A T S SP317 SP306 SP303 SP312 SP311 0 8 6 2 4 3 R 0 5 0 2 0 S 4 1 C L V A 9 0 3 A V 0 8 6 9 3 3 R 0 8 6 1 4 3 R 0 5 0 2 0 S ...

Page 42: ...3 0 2 R 3 1 2 C p 9 3 p 9 3 9 0 2 C 0 0 2 2 0 M 5 L V A 0 0 2 A V p 9 3 1 0 2 C p 9 3 4 1 2 C C I M V _ 5 V 2 0 0 2 2 0 M 5 L V A 1 0 2 A V 0 1 2 C p 9 3 0 0 1 7 0 2 R 0 0 2 C I M L 3 3 C 2 4 L 5 1 4 B O 1 2 1 1 2 C u 1 0 K 2 2 4 1 2 R u 0 1 2 0 2 C N _ C I M P _ C I M 3 10 Main Speaker In the case of B2050 The main speaker is driven directly from AD6537B AOUT1P and AOUT1N pins and the gain is con...

Page 43: ...K 2 2 1 0 2 R 4 0 2 R K 3 3 K 0 2 5 0 2 R 0 0 2 J T N A _ O I D A R T C E T E D _ K C A J P _ C I M _ T E S D A E H N _ T U O _ K P S _ T E S D A E H P _ T U O _ K P S _ T E S D A E H T C E T E D _ K O O H N _ C I M _ T E S D A E H Figure 3 29 HEADSET JACK INTERFACE 3 11 Headset Interface This phone chooses a 5 pin type headset which has 6 electrodes such as HEADSET_SPK_OUT_P HEADSET_MIC_P JACK_DE...

Page 44: ... 1 S B B E L 0 0 3 D L 0 2 3 C u 1 1 2 3 C u 1 8 1 3 C u 1 H 4 1 S B B E L 3 0 3 D L 4 4 3 R 7 4 1 0 3 D L H 4 1 S B B E L H 4 1 S B B E L 2 0 3 D L 2 L B _ Y E K _ I D I M 1 L B _ Y E K _ I D I M Figure 3 30 KEY BACK LIGHT ILLUMINTION 3 12 Key Back light Illumination In key back light illumination there are 6 Blue LEDs in Main Board which are driven by MIDI_KEY_BL1 and MIDI_KEY_BL2 signal from ML...

Page 45: ...E 3 D N G 2 1 N I 5 T U O u 1 0 0 2 0 3 C 5 1 3 R K 5 1 T A B V u 7 4 0 0 3 C 1SS352 D300 R399 51K 2 1 0 3 N C 1 1 0 3 C u 1 R O T A R B I V _ I D I M Figure 3 32 MOTOR 3 13 VIBRATOR The vibrator is placed in the folder cover and contacted to LCD MODULE The vibrator is driven from MIDI_VIBRATOR from ML2871HB ...

Page 46: ...3 TECHNICAL BRIEF 45 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO Figure 4 1 a TEST POINT 4 TROUBLE SHOOTING 4 1 RX Trouble ...

Page 47: ...H 7 level setting TCH 62CH 60dBm setting BCCH Spectrum analyzer setting Oscilloscope setting Check regulator circuit Check VCTCXO Check FEM Mobile SW Check RX IQ Redownload SW or Do calibration again Checking Flow 4 TROUBLE SHOOTING ...

Page 48: ...02 Is high Change main board NO NO YES Voltage at Pin5 of U702 Is 2 8V Regulator Circuit is OK See next Page to check VCTCXO Replace U702 VBAT CLKON C533 10u IN U702 MIC5255 85BM5 GNO EN OUT BYP 1 2 3 4 C734 C534 RF2V85 5 10u 0 01u 1608 Figure 4 2 1 Checking Regulator Circuit ...

Page 49: ...ing X500 VCTCXO Circuit is OK See next Page to check ANT SW Mobile SW Check U101 PMIC Graph 4 1 a Graph 4 1 b TEST POINT CIRCUIT Checking Flow Waveform 13 MHz O K AFC X500 2V75_VVCXO 13MHz C536 22u VCC GNO OUT VCONT 100 R514 1 2 3 1 4 C538 1000p 15K R516 2 Checking VCTCXO Circuit 4 TROUBLE SHOOTING ...

Page 50: ... SW500 KMS 507 H n 0 1 7 1 5 C A N 0 0 5 C 2 0 5 P T 2 1 5 R 0 1 0 5 P T 7 1 5 1 X R _ S C P 2 X R _ S C P 6 1 C V 7 4 1 2 C V 3 C V 6 1 11 T N A X T _ S C P _ S C D 5 1 3 1 X R _ S C D 2 X R _ S C D 4 9 1 1 D N G 3 1 2 D N G 2 1 3 D N G 4 D N G 9 1 1 X R _ M S G 2 X R _ M S G 2 X T _ M S G 0 0 5 L F 8 5 1 A H C 7 P S M L 9 3 5 C p 0 7 2 p 0 7 2 7 3 5 C p 0 7 2 0 5 5 L H n 8 1 5 3 5 C p 2 2 3 4 5 ...

Page 51: ...g SW500 For these 2 test case No Call connection is needed No No Check RF Level of FL500 1 for GSM FL500 3 for DCS FL500 5 for PCS FEM Mobile SW is OK See next Page to check Rx IQ Signal Pin1 62dBm n 3 5 63dB No Changing FL500 Yes No For this RF Level test case RX Stand aloneMode is needed refer to chapter 11 Changing the board Table 4 2 ANT SW EGSM_Tx DCS PCS_Tx EGSM DCS_ Rx PCS_Rx VC1 L L L H AN...

Page 52: ...aph 4 4 Similar Yes No Replace U500 TEST POINT CIRCUIT Checking Flow Waveform Graph 4 4 27 XOUT 3 N I X R P I X R 2 N Q X R 1 RXQP 28 5 N I X T 4 P I X T 7 N Q X T 6 P Q X T VDD2 32 XEN DIAG2 29 GND2 GND3 30 31 GND4 0 0 5 U 5 0 2 4 I S p 2 2 9 1 5 C 5 8 V 2 F R 2 3 5 C p 0 0 0 1 8 1 5 C u 2 2 0 0 6 1 5 C p 9 3 4 1 5 C p 9 3 N I P I N Q P Q Z H M 3 1 ...

Page 53: ... 52 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM 4 TROUBLE SHOOTING ...

Page 54: ...HP8960 Test mode 62 CH 7 level setting TCH 62CH 60dBm setting BCCH Spectrum analyzer setting Oscilloscope setting Check regulator circuit Check VCTCXO Check FEM Mobile SW Check PAM contral signal Check TX IQ Redownload SW or Do calibration again ...

Page 55: ...S YES NO NO Regulator Circuit is OK See next Page to check VCTCXO Level at Pin3 of U702 Is high Replace U702 Change main board VBAT CLKON C533 10u IN U702 MIC5255 85BM5 GNO EN OUT BYP 1 2 3 4 C734 C534 RF2V85 5 10u 0 01u 1608 1 Checking Regulator Circuit 4 TROUBLE SHOOTING ...

Page 56: ... to Graph 4 1 a Yes No No 2 7V OK Yes Changing X500 VCTCXO Circuit is OK See next Page to check ANT SW Mobile SW Check U101 PMIC TEST POINT CIRCUIT 13 MHz O K Checking Flow Waveform AFC X500 2V75_VVCXO 13MHz C536 22u VCC GNO OUT VCONT 100 R514 1 2 3 1 4 C538 1000p 15K R516 2 Checking VCTCXO Circuit ...

Page 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...

Page 58: ... VC1 VC2 VC3 Changing board Go to 4 3 5 Checking PAM control singnal Changing SW500 Changing SW500 Pin17 29 5dBm Pin15 26 5dBm Open No No No No Yes Yes Yes Yes Short END Check RF Level of FL500 Pin 17 for GSM Pin 15 for DCS Check SW500 ANT RF with RF Cable connected Check SW500 ANT RF with RF Cable disconnected Checking Flow Check R512 R515 R517 Check whether FEM Set as TX mode Refer to Graph4 6 a...

Page 59: ... 2 2 9 1 5 C 12 18 GND9 7 N I _ M S G E L B A N E _ X T 3 T T A B V 4 6 P M A R V T C E L E S _ D N A N I _ S C P _ S C D 1 5 D N G 10 GND1 GND10 19 20 11 GND2 5 8 V 2 F R 2 5 8 V 2 F R 0 0 5 R K 5 1 8 1 5 C u 2 2 0 0 2 0 5 R 0 0 1 T A B V 1 0 5 C p 9 3 9 0 5 C p 0 1 5 0 5 R 0 5 1 0 5 1 4 0 5 R 6 3 3 0 5 R 6 0 5 R 0 3 0 8 1 8 0 5 R 7 0 5 R 0 8 1 p 7 2 4 0 5 C 0 0 1 1 0 5 R 1 1 5 C p 7 2 N E _ A P ...

Page 60: ...o Graph 4 8 Similar Yes No Redownload the Software And calibrate Replace U500 27 XOUT 3 N I X R P I X R 2 N Q X R 1 RXQP 28 5 N I X T 4 P I X T 7 N Q X T 6 P Q X T VDD2 32 XEN DIAG2 29 GND2 GND3 30 31 GND4 0 0 5 U 5 0 2 4 I S p 2 2 9 1 5 C 5 8 V 2 F R 2 3 5 C p 0 0 0 1 8 1 5 C u 2 2 0 0 6 1 5 C p 9 3 4 1 5 C p 9 3 N I P I N Q P Q Z H M 3 1 ...

Page 61: ...1 1 C u 1 2 1 1 C 2V5_VMIC p 7 2 1V8_VRTC u 1 9 4 1 C 8 1 1 C K 0 1 4 0 1 R 2V8_VMEM u 1 3 1 1 C 1 P 1 E R O C V 1 N 2 E R O C V 4 A 1 T X E V 4 B 2 T X E V 3 T 1 M E M V 2 M E M V 2 T C I M V 6 1 N 7 T C T R V M I S V 6 T 6 1 D O X C V V 6 1 H B B A V T E N _ T A B V 4 T 5 1 E _ C N 5 1 E 6 1 E 6 1 E _ C N 6 1 F _ C N 6 1 F 4 3 Power On Trouble 4 TROUBLE SHOOTING ...

Page 62: ...EYON of U101 HIGH Does it work properly YES YES YES YES YES NO NO NO NO NO NO THE PHONE WILL POWER ON Replace the main board Check Battery Voltage 3 35V Does it work properly VCORE 1 8V VMEM 2 8V VEXT 2 8V VABB 2 75V WCXO 2 75V VRTC 1 8V VSIM 2 5V when sim card is inserted VMIC 2 5V Re download software Replace U101 Check the contact of power key Or dome switch Charge or Change Battery ...

Page 63: ... A B V 2 0 8 0 1 R 7 2 1 C u 0 1 2 0 S U C 0 0 1 D G H C V 5 A 3 R L E S M E M V 8 B E S N E S T A B V 5 B _ C N 5 B 7 B _ C N 7 B 6 1 G 6 1 G _ C N 1 R 1 R _ C N 5 1 T _ C N 5 1 T 6 A E V I R D E T A G 5 T 1 T E N _ D N G E S N E S I 7 A 0 3 3 9 0 1 R R108 Q100 D100 4 4 Charging Trouble 4 TROUBLE SHOOTING ...

Page 64: ...ge the TA Resoler the Q100 D100 R108 Replace the Q100 D100 Replace the Q100 The battery may have problems Change the battery Resolder the CN300 Pin 4 5 VCHARGE Pin 12 26 30 GND Voltage at anode of D100 5 2 V Q100 D100 R108 are well soldered Voltage across R108 is about 10 100mV 0 7 voltage R109 1 3V Battery is charged Charging is properly operating ...

Page 65: ...3 C u 1 1 0 4 U 5 M B 5 8 2 5 5 2 5 C I M 4 P Y B N E 3 D N G 2 1 N I 5 T U O u 1 0 0 2 0 3 C 5 1 3 R K 5 1 T A B V u 7 4 0 0 3 C 1SS352 D300 R399 51K 2 1 0 3 N C 1 1 0 3 C u 1 R O T A R B I V _ I D I M 4 5 Vibrator Trouble 4 TROUBLE SHOOTING ...

Page 66: ...ge at pin 3 of U401 high YES YES YES YES NO NO NO NO NO NO YES YES YES Check the soldering of R315 R399 Check the soldering of C300 Check the soldering of C300 Replace U401 Replace U401 Replace vrbrator Vibrator working Resolder R315 R399 Resolder C300 Resolder C300 Is the voltage at pin 1 of U401 high Is the voltage at pin 5 of U401 high ...

Page 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...

Page 68: ...CN400 Resoldering CN400 Resoldering EMI filter FL400 FL403 Reassemble FPCB with CN400 connector Replace LCD module Is the connection of FPCB with connector on PCB CN400 ok Check the soldering of EMI filter Does LCD work properly LCD working YES NO NO NO NO YES YES YES ...

Page 69: ...rom the earphone Level 1 2 8 9 pin Of U700 is OK Check U205 works properly Level 2 8 1 9 pin of U701 is OK Change U205 Change U701 Check Soldering of L202 C219 Resolder L202 C219 Change main board Check Soldering Component Around U701 OK Resolder the component Change U700 Check Soldering Component Around U700 OK Resolder the component GO to 4 10 Earphone Trouble YES YES YES YES YES YES YES YES NO ...

Page 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...

Page 71: ...2 C 5 B 1 D N G P S 3 C 2 D N G P S 3 D N G P S 4 C 5 C 4 D N G P S T U O P S 6 A T U O P S 6 B 4 A D D V P S F E R V 1 A 1 C C G E R V R W 4 F 0 D 4 E 5 F 1 D 2 D 6 F 3 D 5 E 6 E 4 D 6 D 5 D 5 D 6 D 4 D 7 D D N G D 2 B 1 B D D V D 3 D L E S F I 3 E E L I D D V O I 2 F Q R I 2 D 2 A T U O L N I X I M 3 A B H 1 7 8 2 L M 3 0 2 U 3 B T U O A 1 F K C O L C 3 F S C K 0 2 4 2 2 R 2 3 2 C u 0 1 9 N W O ...

Page 72: ...e speaker Check U202 works properly Check U206 works properly Check Voltage level of 4 5 pin of U206 Reassemble speaker Re solder U202 Re solder U206 Re solder the components Replace U203 Change main board Speaker Works properly Speaker working YES NO NO NO NO NO YES YES YES YES YES ...

Page 73: ...I S M I S V _ 5 8 V 2 A N 4 1 3 C M I S V _ 5 8 V 2 n 0 2 2 5 1 3 C 7 3 3 R 0 0 8 3 3 R 0 1 3 A 0 5 0 2 0 S 4 1 C L V K L C 3 1 D N G 4 7 2 D N G 3 D N G 8 9 4 D N G 5 D N G 0 1 6 O I 2 T S R C C V 1 P P V 5 0 0 3 J 7 1 3 C A N p 0 0 0 1 6 1 3 C 6 3 3 R K 0 2 A T A D _ M I S T S R _ M I S K L C _ M I S ...

Page 74: ...he SIM Card And try again Does it work Properly Change the SIM Card Our Phone supports only 3V SIM card Voltage at VSIM of U101 Is 3V Redownload SW Does it work Properly Replace J300 or check soldering of components Change the main board Change SIM Card SIM Card will be detected YES NO NO NO NO NO YES YES YES YES ...

Page 75: ...2 A V p 9 3 5 0 2 C T X E V _ 8 V 2 u 0 1 5 1 2 C N I V N I V 4 H u 2 2 0 0 2 L 1 0 2 U T K X E 5 7 0 9 X A M 2 D N G 1 T U O C C V 5 3 3 0 2 A V AVL5M02 200 9 1 2 C p 0 1 7 0 2 C u 0 1 K 2 2 1 0 2 R 4 0 2 R K 3 3 K 0 2 5 0 2 R 0 0 2 J T N A _ O I D A R T C E T E D _ K C A J P _ C I M _ T E S D A E H N _ T U O _ K P S _ T E S D A E H P _ T U O _ K P S _ T E S D A E H T C E T E D _ K O O H N _ C I ...

Page 76: ... mode Can you hear the sound from the earphone Voltage level check Of HEADSET_MIC_P signal Check U200 U205 works properly Voltage level check Of HEADSET_SPK_OUT_P HEADSET_SPK_OUT_N signal Resolder components Resoler U200 U205 Change main board Can you hear your voice from the earphone Can you hear your voice from the earphone Earphone will work properly Level at JACK_DETECT signal is low Resolder ...

Page 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...

Page 78: ...YES NO NO NO YES CIRCUIT DIAGRAM T H G I L K C A B Y E K H 4 1 S B B E L 5 0 3 D L u 1 9 1 3 C 7 4 8 4 3 R 7 4 7 4 3 R 6 4 3 R 7 4 9 4 3 R 7 4 7 4 5 4 3 R 4 0 3 D L H 4 1 S B B E L T A B V 2 2 3 C u 1 u 1 3 2 3 C H 4 1 S B B E L 0 0 3 D L 0 2 3 C u 1 1 2 3 C u 1 8 1 3 C u 1 H 4 1 S B B E L 3 0 3 D L 4 4 3 R 7 4 1 0 3 D L H 4 1 S B B E L H 4 1 S B B E L 2 0 3 D L 2 L B _ Y E K _ I D I M 1 L B _ Y E...

Page 79: ... _ K P S N _ K P S N _ C E R L E S _ K P S P _ C E R p 9 3 0 4 1 C p 9 3 3 4 1 C 4 4 1 C p 9 3 9 3 1 C p 9 3 4 1 1 R 7 4 7 4 1 1 1 R p 9 3 1 4 1 C SGND1 T8 SGND2 R8 DGND M2 2 C I P G N15 LGND 6 1 K N 3 T U O A 6 1 J P 3 T U O A AGND1 B16 AGND2 A11 5 1 K N 1 T U O A P 1 T U O A 5 1 J 9 T 1 N 2 T U O A 9 R 2 N 2 T U O A 1 1 R 1 P 2 T U O A 1 1 T 2 P 2 T U O A E N O T G N I R P _ K P S _ T E S D A E ...

Page 80: ...S or continuous wave Set the receiving volume of mobile as Max Checking Flow START Check the state of contact of dual mode speaker receiver Reassemble receiver Resolder or replace U202 Resolder R111 R114 C139 C140 C141 U202 works properly Check the voltage at 5 7 pin of U202 Change main board YES NO NO NO YES YES ...

Page 81: ...2 R 0 0 1 0 1 2 R 0 8 0 2 R K 2 2 3 0 2 R 3 1 2 C p 9 3 p 9 3 9 0 2 C 0 0 2 2 0 M 5 L V A 0 0 2 A V p 9 3 1 0 2 C p 9 3 4 1 2 C C I M V _ 5 V 2 0 0 2 2 0 M 5 L V A 1 0 2 A V 0 1 2 C p 9 3 0 0 1 7 0 2 R 0 0 2 C I M L 3 3 C 2 4 L 5 1 4 B O 1 2 1 1 2 C u 1 0 K 2 2 4 1 2 R u 0 1 2 0 2 C N _ C I M P _ C I M ...

Page 82: ... DC 2 5V Check the signal Level at each side of MIC200 mV AC Check the soldering of R207 R208 R210 C210 C211 IMicrophone will work properly Resolder component Replace microphone Resolder R200 R203 Replace U101 YES YES NO NO NO NO YES YES SETTING After intialize Agilent 8960 Test EGSM DCS mode ...

Page 83: ...N E _ A D R I N _ 2 _ O I P G 8 1 K X T _ A D R I _ 0 _ O I P G 8 1 L X R _ A D R I _ 1 _ O I P G 4 1 L N I K L C 0 1 N N O K L C 3 1 P p 0 0 0 1 9 2 1 C 2 2 1 P T R110 10M O T S _ O I D A R T C E T E D _ O I D A R L E S _ O I D A R _ K P S N O R W P N O K L C T E S E R _ 8 0 6 1 u 1 6 1 1 C u 1 5 1 1 C BAT100 u 1 4 1 1 C u 2 2 7 1 1 C u 1 2 1 1 C p 7 2 u 1 9 4 1 C 8 1 1 C K 0 1 4 0 1 R u 1 3 1 1 ...

Page 84: ...low START Is the voltage level of BAT100 1 2V Check Soldering of R104 C112 C149 Check the voltage at 1 4 of X100 Change main board Charge or change BAT100 Resolder R104 C112 C149 Resolder R110 C130 or Replace X100 YES NO NO NO YES YES ...

Page 85: ...UIT DIAGRAM 1 2 1 0 2 E G R A H C V 6 5 3 R K 7 4 K 5 1 5 5 3 R 1 4 1 0 3 Q 0 1 1 T 9 X M I 2 5 6 3 T A B V u 1 0 4 2 3 C u 1 0 5 2 3 C 5 8 5 5 C S 2 1 0 4 Q 2 3 1 5 1 2 5 3 R 10K R357 K 1 3 5 3 R R358 10K R350 750 6 0 3 D L R359 20 T A B V E G R A H C E R P Q301 Q401 ...

Page 86: ...Is about 40mV Check soldering of R350 Replace LD306 Resolder R350 Change main board Resolder Q401 Resolder Q301 Voltage level at 2pin of Q401 Is about 680mV Voltage level at 2pin of Q301 Is low YES YES YES YES NO NO NO NO Indication LED only operates in trickle charging mode ...

Page 87: ... 86 5 DOWNLOAD AND CALIBRATION Figure 5 1 DOWNLOAD SETUP UART 5 DOWNLOAD AND CALIBRATION 5 1 Download A Download Setup Figure 5 1 describes Download setup ...

Page 88: ... 2 Select Rate 3 Select Hermes 4 Select Erase 5 Insert FDI region Donʼt Check OWUD 2 Press Start and Wait until Erase is completed B Download Procedure 1 Access Flash loader program in PC and select Erase Don t check OWCD 2 Press Start and Wait until Erase is completed ...

Page 89: ... 88 5 DOWNLOAD AND CALIBRATION 1 Select Port 2 Check 3 Check 3 Press Write to start Download and press key to choose software AlchemyDate mot ...

Page 90: ...ct File 2 Press Open 1 Donʼt Check OWUD 3 Wait until completion 4 Choose software 5 Wait until coverting from MOT to BIF is completed Donʼt check OWUD 4 Choose software 5 Wait until coverting from MOT to BIF is completed Don t check OWUD ...

Page 91: ... 90 5 DOWNLOAD AND CALIBRATION 6 Press Start and Pover on the phone using JIG remote Power on Switch 1 ...

Page 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...

Page 93: ... 92 5 DOWNLOAD AND CALIBRATION ...

Page 94: ...the 3rd 4thof DIP SW ON state always 4 Press the Phone power key if the Remote ON is used 1stON state D Procedure 1 Connect as Fig 6 2 RS232 serial cable is connected between COM port of PC and MON port of TEST JIG in general 2 Power ON PC then enter into Windows 98 Remark Windows 2000 system could be feasible 3 Run AUTOCAL exe the AUTOCAL application window will be appeared ...

Page 95: ...VTCXO 2V5_VMIC POWERKEY GATE DRIVE AOTU1 AINI AIN2 AOUT3 AOUT2 VCHG LIGHT LIGHT VOUTNOR VBAT S G D VINNOR AUXIP AUXOP1 AUXOR2 AFC Control Signal Power Audia RF ADD0 CS WR RD DIMM DATA 0 15 ADDR 0 23 ROM_CS RAM_CS 13MHz RD WD RST KEYROW 0 4 KEYCOL 0 4 POWERKEY MIDI_IRQ AUXOP2 SIM_RST CLK DATA VSIM USC 0 5 DEBUG BAT_TEMP VBAT VCHG MIDI_RST CS VSYNTHEN ANT_SW SDATA EN CLK PA_EN BAND ABB_IRQ ABB_RESET...

Page 96: ... Diagram ANT S W Tranceiver SI4205 13MHz LDO B A S E B A N D PAM RF3166 FEM Murata VBAT DCS PCS_OUT DCS PCS_IN GSM_OUT GSM_IN GSM_IN TX_RAMP PA_EN PA_BAND 13MHz RXI RXO TXI TXQ RF_PD S_EN S_CLK S_DAT AFC 2V8_VRT ANT_SW1 ANT_SW2 VSYNTHEN 2V75_VTCXO DCS_IN PCS_IN ...

Page 97: ......

Page 98: ...0 H8 F1 ADD11 G3 ADD12 ADD13 G1 10K 39p C135 R118 NA VBAT VREF TP102 C131 D101 KDS121E 3 1 2 C101 1u 1V8_VRTC _F_WE JTAG1 GND JTAGEN RPWON TCK TDI TDO_0 TDO_1 TMS VBAT TP101 C142 1u TP119 C144 39p 1u C122 BAT100 1u C119 0 082u VBAT OJ4 C121 TP104 C139 39p 2V8_VEXT 2V75_VABB C111 47n 47n C100 2V8_VEXT 100 R105 82K R112 0 2 R108 2V85_VSIM C114 1u C123 100p C105 1u C124 100p R114 4 7 VBAT C117 2 2u 1...

Page 99: ...36 1u 1M R202 AVL5M02 200 VA200 C220 10u R238 56K 39p C201 C227 NA 220K R209 39p C214 AVL5M02 200 VA204 5 1K R239 0 1u C203 NA C204 39K R229 MIXOUT B4 E1 P0_PWMA P5_VIB C6 RD E2 D1 RESET ROUT C2 B5 SPGND1 C3 SPGND2 SPGND3 C4 C5 SPGND4 SPOUT A6 SPOUT B6 A4 SPVDD VREF A1 C1 VREGC WR F4 D0 E4 F5 D1 D2 F6 D3 E5 E6 D4 D6 D5 D5 D6 D4 D7 DGND B2 B1 DVDD D3 IFSEL E3 ILE IOVDD F2 IRQ D2 A2 LOUT MIXIN A3 7 ...

Page 100: ...S02050 C306 10p C318 1u MENU R343 680 1SS352 D300 R399 51K AVLC14S02050 VA311 LEBB S14H LD303 SP318 C350 R344 47 100p 680 R310 C309 27p SP307 SP320 SP314 AVLC14S02050 VA330 SP302 LD301 6 LEBB S14H 3 R326 47 VA310 AVLC14S02050 4 2V8_VMEM LEBB S14H LD302 LD306 VA304 AVLC14S02050 R359 20 NA R332 R333 NA 39p C305 R312 NA R317 680 CLK 3 GND1 4 7 GND2 GND3 8 9 GND4 GND5 10 6 IO 2 RST VCC 1 VPP 5 J300 68...

Page 101: ...LTER4 2 C4 FILTER5 1 A5 C5 FILTER5 2 FILTER6 1 A6 C6 FILTER6 2 B1 G1 B2 G2 G3 B3 2V8_VMEM FL401 CSPEMI306A V A1 FILTER1 1 FILTER1 2 C1 A2 FILTER2 1 FILTER2 2 C2 A3 V FILTER1 1 A1 C1 FILTER1 2 FILTER2 1 A2 C2 FILTER2 2 FILTER3 1 A3 FILTER3 2 C3 FILTER4 1 A4 C4 FILTER4 2 A5 FILTER5 1 FILTER5 2 C5 A6 FILTER6 1 FILTER6 2 C6 G1 B1 G2 B2 B3 G3 CSPEMI306A FL400 C719 1u C727 18p R709 4 7K R400 51K 12K R40...

Page 102: ...29 30 GND21 GND22 31 32 GND23 GND3 12 GND4 13 GND5 14 15 GND6 GND7 16 GND8 17 18 GND9 7 GSM_IN 8 GSM_OUT TX_ENABLE 3 VBATT 4 6 VRAMP BAND_SELECT DCS_PCS_IN 1 DCS_PCS_OUT 9 5 GND 10 GND1 GND10 19 20 GND11 21 GND12 GND13 22 GND14 23 24 GND15 25 GND16 GND17 26 27 GND18 GND19 28 11 GND2 GND20 RF2V85 U501 RF3166 2 10u C534 10u C533 0 R515 R517 0 0 022u ANT G1 G2 RF C527 C523 SW500 KMS 507 RF2V85 100p C...

Page 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...

Page 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...

Page 105: ......

Page 106: ...service man engineer to view and test the basic functions provided by a handset B Access Codes The key sequence for switching the engineering mode on is 2945 Pressing END will switch back to non engineering mode operation C Key Operation Use Up and Down key to select a menu and press select key to progress the test Pressing back key will switch back to the original test menu D Engineering Mode Men...

Page 107: ...ame time 2 Backlight off LCD Backlight and Keypad Backlight light off at the same time 3 Backlight value This controls brightness of Backlight When entering into the menu the present backlight value in the phone is displayed Use Left Right key toadjust the level of brightness The value of the brightness set at last will besaved in the NVRAM 9 1 4 Buzzer This menu is to test the melody sound 1 Melo...

Page 108: ...aseband Codec chip Although the actual value can be written over it returns to default value after switching off and on the phone 1 VbControl1 VbControl1 bit Register Value Setting 2 VbControl2 VbControl2 bit Register Value Setting 3 VbControl3 VbControl3 bit Register Value Setting 4 VbControl4 VbControl4 bit Register Value Setting 5 VbControl5 VbControl5 bit Register Value Setting 6 VbControl6 Vb...

Page 109: ...olume of Melody It rings in the following sequence Volume 1 Volume 2 Volume 3 Volume 0 mute Volume 4 Volume 5 9 3 4 Vibrator Vibrator is on for about 1 5 seconds 9 3 5 LCD 1 LCD Main LCD screen resolution tests horizontally and vertically oneby one and fills the screen 9 3 6 Key pad When a pop up message shows Press Any Key you may press any keys including side keys but not Soft2 Key If the key is...

Page 110: ...nversation time to this 00 00 00 3 DAI DOWNLINK Speech decoder test 4 DAI OFF DAI mode off 9 6 Fact Reset MENU 6 This Factory Reset menu is to format data block in the flash memory and this procedure set up the default value in data block Attention 1 Fact Reset i e Factory Reset should be only used during the Manufacturing process 2 Servicemen should NOT progress this menu otherwise some of valuab...

Page 111: ...rt select a correct COM port Baud rate 38400 Leave the rest as default values B Tx 1 Selecting Channel Select one of GSM or DCS Band and input appropriate channel 2 Selecting APC a Select either Power level or Scaling Factor b Power level Input appropriate value GSM between 5 19 or DCS between 0 15 c Scaling Factor A Ramp Factor appears on the screen You may adjust the shape of the Ramp or directl...

Page 112: ...10 STAND ALONE TEST 111 10 3 Means of Test a Select a COM port b Set the values in Tx or Rx c Select band and channel d After setting them all above press connect button e Press the start button ...

Page 113: ...10 STAND ALONE TEST 112 ...

Page 114: ...File F Save Setting Save Current Calibration settings to setting file cal File F Load Setting Load saved Calibration setting File F Make BIN ALL Make binary file after calibration finished File F Make BIN BAT Cal only Make binary file of battery cal data only after calibration finished File F Make Write BIN Make binary file after calibration finished then download it to the Flash Memory View V Too...

Page 115: ...oss Enter the RF cable loss GSM and DCS Screen GPIB Primary address Enter the SS Ag8960 and PS Tektronix PS2521G GPIB address Screen ADC Channel Default ADC Calibration Channel Screen Auto Calibration Item Default Calibration Settings about Tx Rx ADC and write BIN file 114 ...

Page 116: ...nfig Table and temperature ConfigTable 11 7 Setting check com port and cable loss Select automatic calibration item If you uncheck one item cali bration will stop from the unchecked item This is useful when you want to process only oneitem 11 8 How to do calibration A Connect cable between phone and serial port of PC B Connect Ag8960 equipment and Power Supply and phone C Set correct port and baud...

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Page 118: ... 117 1 2 9 3 4 26 29 28 13 20 19 18 17 27 21 16 15 24 14 12 25 11 10 23 22 8 7 5 6 12 EXPLODED VIEW REPLACEMENT PART LIST 12 1 Exploded View ...

Page 119: ......

Page 120: ...TAZ0063001 28 4 MTAZ01 TAPE MTAZ0063601 29 3 ACGM00 COVER ASSY REAR ACGM0044201 Black 4 MCJN00 COVER REAR MCJN0030101 Black 17 4 MTAB TAPE PROTECTION MTAB0069501 4 MTAZ00 TAPE MTAZ0063501 27 3 AKAZ KEYPAD ASSY AKAZ0009303 Silver 7 3 GMEY00 SCREW MACHINE BIND GMEY0004001 1 4 mm 4 0 mm MSWR3 BK B HEAE t 0 6 HEAD d2 5 Black 25 3 GMZZ00 SCREW MACHINE GMZZ0015101 1 4 mm 3 0 mm MSWR3 FN N Silver 18 3 MC...

Page 121: ... 47 nF 10V K X5R HD 1005 R TP 6 C105 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C106 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C107 CAP CERAMIC CHIP ECCH0000163 47 nF 10V K X5R HD 1005 R TP 6 C108 CAP CERAMIC CHIP ECCH0000163 47 nF 10V K X5R HD 1005 R TP 6 C109 CAP CERAMIC CHIP ECCH0000393 22 uF 6 3V M X5R HD 2012 R TP 6 C110 CAP CERAMIC CHIP ECCH0000115 22 pF 50...

Page 122: ...IP ECCH0000117 27 pF 50V J NP0 TC 1005 R TP 6 C200 CAP CERAMIC CHIP ECCH0000120 39 pF 50V J NP0 TC 1005 R TP 6 C203 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C205 CAP CERAMIC CHIP ECCH0000120 39 pF 50V J NP0 TC 1005 R TP 6 C206 CAP TANTAL CHIP MAKER ECTZ0003101 33 uF 10V M STD ETC R TP 6 C207 CAP TANTAL CHIP MAKER ECTZ0005201 10 uF 6 3V M L_ESR 1608 R TP 6 C208 CAP TANTAL CHIP M...

Page 123: ... 6 C313 CAP CERAMIC CHIP ECCH0006501 10 uF 6 3V K X5R TC 2012 R TP 6 C315 CAP CERAMIC CHIP ECCH0004902 220 nF 10V Z Y5V TC 1005 R TP 6 C316 CAP CERAMIC CHIP ECCH0000143 1 nF 50V K X7R HD 1005 R TP 6 C325 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C326 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C327 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C328 ...

Page 124: ...IC CHIP ECCH0000103 1 5 pF 50V C NP0 TC 1005 R TP 6 C532 CAP CERAMIC CHIP ECCH0000143 1 nF 50V K X7R HD 1005 R TP 6 C533 CAP CERAMIC CHIP ECCH0007901 10 uF 4V M X5R TC 1608 R TP 6 C534 CAP CERAMIC CHIP ECCH0007901 10 uF 4V M X5R TC 1608 R TP 6 C535 CAP CERAMIC CHIP ECCH0000135 270 pF 50V K X7R HD 1005 R TP 6 C536 CAP CERAMIC CHIP ECCH0005801 2 2 uF 6 3V K X5R TC 1608 R TP 6 C537 CAP CERAMIC CHIP E...

Page 125: ...5 R TP 6 L550 INDUCTOR CHIP ELCH0005010 1 8 nH S 1005 R TP 6 Q100 TR FET P CHANNEL EQFP0004201 2 9 1 9 0 8 t 0 7 W 20 V 6 0 A R TP NDC652P upgrade substitution item 6 Q200 TR BJT NPN EQBN0004801 SMT6 0 2 W R TP 6 Q301 TR BJT NPN EQBN0004801 SMT6 0 2 W R TP 6 Q400 TR BJT NPN EQBN0007101 EMT3 0 15 W R TP LOW FREQUENCY 6 Q401 TR BJT NPN EQBN0007101 EMT3 0 15 W R TP LOW FREQUENCY 6 R104 RES CHIP ERHY0...

Page 126: ...hm 1 16W J 1005 R TP 6 R234 RES CHIP ERHY0000201 0 ohm 1 16W J 1005 R TP 6 R235 RES CHIP ERHY0000254 4 7K ohm 1 16W J 1005 R TP 6 R237 RES CHIP ERHY0000201 0 ohm 1 16W J 1005 R TP 6 R238 RES CHIP ERHY0000274 51K ohm 1 16W J 1005 R TP 6 R239 RES CHIP ERHY0000254 4 7K ohm 1 16W J 1005 R TP 6 R242 RES CHIP ERHY0000274 51K ohm 1 16W J 1005 R TP 6 R301 RES CHIP ERHY0000261 10K ohm 1 16W J 1005 R TP 6 R...

Page 127: ... 1 16W J 1005 R TP 6 R352 RES CHIP ERHY0007007 15 ohm 1 8W F 2012 R TP 6 R353 RES CHIP ERHY0000241 1K ohm 1 16W J 1005 R TP 6 R355 RES CHIP ERHY0000116 1 5K ohm 1 16W F 1005 R TP 6 R356 RES CHIP ERHY0000273 47K ohm 1 16W J 1005 R TP 6 R357 RES CHIP ERHY0000261 10K ohm 1 16W J 1005 R TP 6 R358 RES CHIP ERHY0000261 10K ohm 1 16W J 1005 R TP 6 R359 RES CHIP ERHY0000207 20 ohm 1 16W J 1005 R TP 6 R370...

Page 128: ... EUSY0250201 BGA 88 PIN R TP 128T 32ps MLC 8X10 6 U400 IC EUSY0238201 QFN 16 PIN R TP 3 LEDs WHITE LED CHARGE PUMP 6 U401 IC EUSY0118602 SOT23 5 PIN R TP 2 85V 150mA Low Noise uCap LDO Regulator 6 U500 IC EUSY0161301 8x8 LGA 28 PIN R TP 6 U501 PAM SMPY0008901 35 dBm 55 2 A 50 dBc 25 dB 6 0 6 0 1 4 SMD GSM QUAD PAM 6 U702 IC EUSY0118602 SOT23 5 PIN R TP 2 85V 150mA Low Noise uCap LDO Regulator 6 VA...

Page 129: ...CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C320 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C321 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C322 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C323 CAP CERAMIC CHIP ECCH0004904 1 uF 6 3V K X5R TC 1005 R TP 6 C324 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C400 CAP CERAMIC CHIP ECCH...

Page 130: ...J 1005 R TP 6 R349 RES CHIP ERHY0000213 47 ohm 1 16W J 1005 R TP 6 R350 RES CHIP ERHY0000239 820 ohm 1 16W J 1005 R TP 6 R400 RES CHIP ERHY0000274 51K ohm 1 16W J 1005 R TP 6 R401 RES CHIP ERHY0000274 51K ohm 1 16W J 1005 R TP 6 R402 RES CHIP ERHY0000274 51K ohm 1 16W J 1005 R TP 6 VA200 RES VARIABLE ETC ERVZ0000101 ohm PIN SMD R TP 1005 SIZE CHIP VARISTOR 6 VA201 RES VARIABLE ETC ERVZ0000101 ohm ...

Page 131: ...scription Part Number Specification Color Remark 3 SBPL00 BATTERY PACK LI ION SBPL0077901 3 7 V 830 mAh 1 CELL PRISMATIC FG101 RUSSV423450 Innerpack 3 SSAD00 ADAPTOR AC DC SSAD0007835 FREE 50 Hz 5 2 V 800 mA CE CB UK IO 24P 3 WSAY00 SOFTWARE APPLICATION WSAY0014101 B2050 TMU PC Sync 3 WSYY00 SOFTWARE WSYY0239601 B2050P40FL 44 V101 234 30 APR 13 2005 1 B2050 TMU S W ...

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LG B2050, Service Manual

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