LG C3600 Manuale utente

Table of Contents

1. INTRODUCTION .........................................................................................1

1.1 Purpose................................................................................................................ 1

1.2 Regulatory Information......................................................................................... 1

2. SYSTEM SPECIFICATION..........................................................................3

3. LG-C3600 TECHNICAL BRIEF....................................................................4

3.1 LG-C3600 Block Diagram.................................................................................... 4

3.2 RF Part................................................................................................................. 5

3.3 BaseBand Transmit Section................................................................................. 6

3.4 BaseBand Receive Section.................................................................................. 6

4. LG-C3600 TROUBLE SHOOTING..............................................................7

4.1 RF Components................................................................................................... 7

4.2 RX Trouble........................................................................................................... 8

4.2.1 Check ANT Feedback Points..................................................................... 8

4.2.2 Check Regulator Circuit............................................................................. 8

4.2.3 Check VCTCXO Circuit.............................................................................. 9

4.2.4 Check Antenna Switch & Mobile Switch....................................................10

4.2.5 Check SAW Filter......................................................................................11

4.2.6 Checking Receive IQ................................................................................12

4.3 TX Trouble ..........................................................................................................13

4.3.1 Check LDO Circuit....................................................................................13

4.3.2 Check VCTCXO Circuit.............................................................................13

4.3.3 Check Transmit IQ....................................................................................13

4.3.4 Check PAM Control Signal........................................................................14

4.3.5 Check Antenna Switch and Mobile Switch................................................15

4.4 Power On Trouble...............................................................................................15

4.5 Charging Trouble ................................................................................................17

4.6 LCD Trouble....................................................................................................... 19

4.6.1 LCD Blue Screen..................................................................................... 19

4.6.2 LCD Blank Screen or Abnormal Screen................................................... 19

4.7 Camera Trouble..................................................................................................20

4.8 Color LED Trouble ..............................................................................................21

4.9 KEYPAD Blacklight LEDS Trouble......................................................................22

4.10 SIM Trouble.......................................................................................................23

4.11 Ear Jack Trouble ...............................................................................................24

4.12 Speaker/Receiver Trouble.................................................................................26

5. DOWNLOAD AND CALIBRATION .............................................................28

6. CIRCUIT DIAGRAM & PCB LAYOUT…………………………………………29

7. EXPLODED VIEW & REPLACEMENT PART LIST………………………….36

1. INTRODUCTION

1.1 Purpose

This manual provides the information necessary to repair, calibration, description and

download the features of LG-C3600.

1.2 Regulatory Information

A. Security

Toll fraud, the unauthorized use of telecommunications system by an unauthorized part

(for example, persons other than your company’s employees, agents, subcontractors, or

person working on your company’s behalf) can result in substantial additional charges for

your telecommunications services. System users are responsible for the security of own

system.There may be risks of toll fraud associated with your telecommunications system.

System users are responsible for programming and configuring the equipment to prevent

unauthorized use. The manufacturer does not warrant that this product is immune from

the above case but will prevent unauthorized use of common – carrier telecommunication

service of facilities accessed through or connected to it. The manufacturer will not be

responsible for any charges that are resulted from such unauthorized use.

B. Changes in Service

A local telephone company may make changes in its communications facilities or

procedure. If these changes could reasonably be expected to affect the use of this phone

or compatibility with the network, the telephone company is required to give advanced

written notice to the user, allowing the user to take appropriate steps to maintain

telephone service.

C. Maintenance Limitations

Maintenance limitations on this model must be performed only by the manufacturer or its

authorized agent. Therefore, note that unauthorized alternations or repair may affect the

regulatory status of the system and may void any remaining warranty.

D. Notice of Radiated Emissions

This model complies with rules regarding radiation and radio frequency emission as

defined by local regulatory agencies. In accordance with these agencies, you may be

required to provide information such as the following to the end user.

E. Interference and Attenuation

Phone may interfere with sensitive laboratory equipment, medical equipment, etc.

Interference from unsuppressed engines or electric motors may cause problems.

F. Electrostatic Sensitive Devices

1. INTRODUCTION

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

system boards.

• When repairs are made to a system board, they should spread the floor with anti-static

mat which is also grounded.

• Use a suitable, grounded soldering iron.

• Keep sensitive parts in these protective packages until these are used.

• When returning system boards or parts like EEPROM to the factory, use the protective

package as described.

2. SYSTEM SPECIFICATION

Item Target Specification

Form Factor Folder Type

Standard Battery (1000mAh , Li-ion)

Size：34(W)×50(H)×5.5(T) mm

Weight：25g

Size 88 X 44 X 23mm

Weight 88.35 Gram(with standard battery)

Standby Current Below 4.5mA under the least current consumption

(e.g. Paging Period = 9)

Talk Time Up to 3 hrs (GSM Tx Lev:5)

Standby Time Up to 200 hrs : Paging Period 9, RSSI 85dBm

Antenna Internal

LCD Main LCD：CSTN 128×160 Pixels 65K Color

Sub LCD: CSTN 96×64 Pixels 65K Color

Back Light Blue LED

PC Sync Yes

Indicator LED None

Vibrator Yes (Cylinder Type)

Buzzer Yes

C-MIC Yes

Receiver Yes

Earphone Jack Yes (Stereo)

SIM Socket Yes (SIM Block Type)

Volume Key Yes

Voice Key Yes

MP3/AAC Yes

MIDI 64 MIDI

I/O Connector 24Pin

Basic Accessory Travel Adaptor

Standard Battery (1000mAh , Li-ion)

Ear-mic

Data Cable

3. TECHNICAL BRIEF

3. LG-C3600 TECHNICAL BRIEF

3.1 LG-C3600 Block Diagram

Figure 3-1 LG-C3600 top level block diagram

The Figure 3-1 shows the top level block diagram of LG-C3600, it contains RF and BB part.

The following list is the detailed:

1. AD6527B : ADI digital baseband chipset

2. AD6537B : ADI analog baseband and power supply chipset

3. SI4205 : RF transmitter chipset

4. NEC9993 : NEC MP3 and Midi chipset

5. RD38F4455LLZDQ0 : 256Mb + 256Mb intel Flash memory chipset

6. CL761S : Camera module

7. Others:

A. 24 main key, 3 MP3 play key and 2 side key.

B. 128 x 160 65K CSTN –LCD module

C. Vibrator

D. Mic

E. Speaker and receiver

F. Ear-jack

G. Sim socket

H. Battery connector

3. TECHNICAL BRIEF

3.2 RF Part

The RF parts consist of a transmitter part, a receiver part, a frequency synthesizer part, a

voltage supply part, and a VCTCXO part. The Aero transceiver is one chip solution which

supports dual and triple-band GSM/GPRS wireless communications. This device

integrated a receiver based on a low IF(100KHz) architecture and a transmitter based on

a modulation loop architecture which contains a complete dual band transceiver with built

in VCOs. The transceiver employed a 3 wire serial interface to allow an external system

controller to write the control registers for dividers, receive path gain, power down setting,

and other controls.

Figure 3-2 Receiver Block Diagram

Figure 3-3 Frequency Synthesizer Block Diagram

Figure3-4 Transmitter Block Diagram

3. TECHNICAL BRIEF

3.3 BaseBand Transmit Section

i. The AD6537B transmit section is designed to support GMSK for both single slot and

multislot applications.

ii. The AD6537B transmit section consists of a digital GMSK modulator, a matched pair of

10-bit DACs and a matched pair of reconstruction filter.

Figure 3-5 AD6537B BASEBAND TRANSMIT SECTION

3.4 BaseBand Receive Section

i. This section consists of two identical ADC channels that process baseband in-phase(I)

and quadrature(Q) signals.

ii. Each channel consists a coarse switched capacitor Anti-alias filter, followed by a low

pass digital filter.

Figure 3-6 AD6537B BASEBAND RECEIVER SECTION

4. TROUBLE SHOOTING

4. LG-C3600 TROUBLE SHOOTING

4.1 RF Components

Figure 4-1 RF Components

Reference Description Reference Description

SW500 Mobile S/W U501 PAM

FL401 EGSM SAW Filter FL500 ANT S/W

FL402 DCS SAW Filter U503 LDO

U502 RF Main Chipset

X500 XCTCXO

ANT500

ANT501 ANT Feedback

Point

Table 4-1

4. TROUBLE SHOOTING

4.2 RX Trouble

START

HP8922:Test M ode

62CH ,7 Level Setting(TCH0

62CH ,-6 0 d B m S ettin g (BCCH)

1 C heck A N T

Feedback Pints

2 Check Regulator

Circuit

3 CheckVCTCX O

Circuit

4 C heck A N T SW

& M o bile S W 5 Check SA W

F ilter C ircu it

6 C heck R eceiving

Redow nload SW ,Cal

4.2.1 Check ANT Feedback Points

See Figure 4-1. Check ANT500 and ANT501 Check Wether theANT Good Contacting

4.2.2 Check Regulator Circuit

Figure 4-2 Regulator Circuit

Regulator Circuit OK see

Check VCTCXO

RF 2.8V OK? PIN6 HIGH ?

Replace the

U503

Change the

Board

YES

Check PIN5 Check PIN 1

NO NO

YES

4. TROUBLE SHOOTING

U503

MIC5255-2.85BM5

4 3

OUT

BYP EN

GND

RF 2.85V

RF_LDO

C535

22n

VBAT

C529

4.7n

(1608)

C536

4.7u

CLKON

AFC

4.2.3 Check VCTCXO Circuit

Figure 4-3 VCTCXO Circuit

13Mhz Right?

2.75v Right?

Check U101

VCTCXO Circuit

no problem, check

below, or software

Replace X501

Chec Pin3

Figure 4-3

Check Pin 4

Figure 4-3

C539

2.2u

C528

100p

X500

26MHz

VCC

OUT

GND

VCONT

2V75_VVCXO

R515 10K

C540

0.1u

R510

100

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