LG KP220 Service Manual

Service Manual

Internal Use Only

Service Manual

KP220

Model : KP220

Date: March, 2008 / Issue 1.0

AMENDMENT RECORD

AMENDMENT RECORD SHEET

Issue Number Date

Draft 1.00 29.11.2007
Draft 1.2 14.02.2008
Draft 1.3 18.02.2008

For details of previous history refer to archival documents.

New Issue Number – Date Changes This Issue, Page and Description Remarks

Draft 1.00 29.11.2007 All for Publication

First draft
Issue

Draft 1.2 14.02.2008 All for Publication

Draft 1.3 18.02.2008

All for Publication

Second
draft Issue

Third draft
Issue

KP220 SERVICE MANUAL V1.2

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SECTION 1

1

Introduction

KP220 SERVICE MANUAL V1.2

1. Introduction

The variation of “KP220” is shown below.
This Service Manual is indicated for 7338.

Variation Note.

Product Code Trade Name

7338

XXXXXXXX KP220

KP220 SERVICE MANUAL V1.2

This is the Electronic Service Manual for KP220 Triple Band GSM Digital
Cellular Telephone from LG. It contains specific information on repair and test
procedures.
For details of user functions, general operation and installation, please refer to the
User Guide.

The Service Manual is set out in the following sections.

1. Precautions for Repair Work : provides general guidelines for

undertaking safe and efficient repair work.

2. Unit Specification: provides the technical specifications for

KG195 Triple Band GSM Digital Cellular Telephone.

3. Introduction of Service Level :

a)

Service Level 1:describes definition of Service Level 1, equipment and

tools required for this level.

b)

Service Level 2 :describes definition, equipment and tools required for

Service Level 2.

4. Circuit Description: provides functional details of the circuits, block

diagrams and component purpose descriptions.

5.

Servicing : defines the jigs, fixtures and test configurations required for

servicing the product; and describes the processes of assembly and

disassembly.

6.

Troubleshooting : provides an aid to fault finding the product. Includes,

using the signal levels and plots at various parts of the circuit.

7. Device Information : provides functional information and pin-outs of

most of the semiconductor devices within the HHP.

8. Glossary :

terms used in this GSM and this manual.

KP220 SERVICE MANUAL V1.2

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SECTION 2

2

Precautions

for Repair Work

KP220 SERVICE MANUAL V1.2

PRECAUTION

Important

Please read the following cautions, notes and

warnings before progressing through this manual or

undertaking any repair action.

Remember: SAFETY FIRST!

CAUTION:

AC Power Cord:

Care must be taken not to damage the AC power cord as fire or electric shock may
result.

Battery Pack:

Only use the specified batteries and chargers with this equipment.
Do not short the battery terminals together.
Keep the battery pack away from fire and sources of ignition.
Remember to recharge the battery pack after each use.

Before Powering up the Equipment:

• Only switch on the telephone’s power once the test or installation set-up is

complete.

• Switching on at the wrong time may result in electric shock or damage to system

components.

• Always ensure that the power is switched off before making connections /

disconnection’s.

• It is important to check that the correct DC voltage is applied to the equipment to

prevent electrical damage.

Component Polarity:

Always check the polarity of connections and components before soldering.
Particular attention must be paid to IC.s, diodes, transistors, capacitors and any
other semiconductor device that is polarity dependent.

KP220 SERVICE MANUAL V1.2

Electrostatic Damage (ESD):

Semiconductor devices are easily damaged by electrostatic discharge. Many of the
procedures detailed in this manual involve disassembly of the equipment and
therefore handling of the printed circuit boards.
To protect these devices from ESD a wrist strap connected to ground must be worn.
In addition to this the work surface must be covered with an anti-electrostatic mat,
which should also be grounded.
If printed circuit boards are to be stored without being re-assembled into their
equipment, then they must be kept in an anti-electrostatic bag.

Grounding:

Each piece of test equipment should be electrically grounded. A third (grounding)
pin is provided as a safety feature. Ensure that the electrical outlet also contains
this feature.

Cosmetic Protection during Repair Work:

Always ensure that the working surface is kept clean and free from abrasive
materials.
The LCD is very susceptible to scratches and damage. It should be covered with
clear adhesive vinyl while the equipment is disassembled.

Storage of Faulty Components:

Any components that are replaced due to failure should be kept safely in an anti­electrostatic container. NEC’s Quality or Research & Development Departments
may require them to make quality and reliability investigations.

No Fault Found Equipment:

In some cases the reported symptom may not be apparent. You may subject the
equipment to a controlled amount of stress, vibration and temperature variation to
see if the fault occurs.
Care should be taken not to apply excessive stress or vibration or extreme
temperature variations as further faults may develop.

KP220 SERVICE MANUAL V1.2

Soldering and Disordering :

The solder used is only Pb-free.
Fast, accurate and high quality soldering is required to minimize the risk of heat
damage to the electronic components.
It is necessary to adjust the temperature of soldering tip to 330 degrees or less.
The soldering tip should not be in contact with components or PCB tracks for longer
than 4 seconds (average). This time depends on temperature conditions of parts.

Heat the pad on the PCB and the lead, quickly apply solder, remove heat and cool.

After soldering is complete, ensure that all solder joints are of good quality - no dry
joints, solder bridges, cracks or excess solder.
The majority of chip components are machine mounted using solder paste.
Removal of the solder is not sufficient for chip component removal. Each solder
point must be heated simultaneously and quickly (to prevent component and PCB
damage). When the solder has melted, remove the component with tweezers.

Short Circuits:

Care must be taken to avoid short circuits. Soldering, solder dust, screws, metal
clippings, metal wrist watches etc. can cause short circuits on PCBs which may
result in component damage.

Test Equipment Calibration:

Your test equipment should be calibrated before use. Frequent calibration is
essential to ensure high quality and reliable repairs.

Cleaning:

Before cleaning ensure that the telephone is switched off and disconnected from the
power source. Cleaning should be done using a soft dry cloth. If the equipment is
heavily soiled a soft cloth soaked in a mild synthetic detergent diluted in water may
be used.
Never use benzene or any other chemicals to clean the equipment.

RF Shielding:

It is advisable to carry out detailed measurements and repair (in particular RX) in a
shielded area to minimize RF interference.

AC Adapter and Battery Charger:

The AC adapter and battery chargers are for indoor use only. Ensure that the
devices are not exposed to rain or moisture

KP220 SERVICE MANUAL V1.2

Electrical Safety:

Electrical equipment is hazardous if misused. Any repairs must be carried out with
care and only by authorized personnel.
Ensure all power sources are switched off and power cords removed before
undertaking any repairs.

Hazardous Waste:

The battery pack, if incorrectly disposed of, is an environmental hazard. It must be
disposed of in accordance with the regulations of the country concerned.
Never dispose of the battery pack in fire or water.

Confidentiality:

The circuitry within this equipment contains several components that are regarded
as company confidential. Only use NEC specified parts as replacements.

RF Injury:

To avoid RF injury, direct exposure to radio frequency energy should be avoided. In
particular, exposed parts of your body (especially the eyes and face) should not
come into contact with the antenna while the equipment is transmitting.

Storage Conditions:

It is recommended that the following storage conditions should be avoided to
prevent damage to the equipment: ­ Dusty.
Humid.
Near to magnetic equipment

In direct sunlight

Ventilation:

Repair areas should be well ventilated and fume extraction systems should be
installed where necessary. Potential hazardous substances are solder fumes, flux,
alcohol etc.

PCB Handling:

It is recommend that cotton gloves are worn during repair work. This is to protect
your hands from chemical contamination and to protect the PCBs from fingerprints
and humidity
.

KP220 SERVICE MANUAL V1.2

SIM Card:

• Do not bend.

• Clean by using a soft dry cloth.

AUDIO Parts:

• Be careful for alien substance/oils and fats, etc. not to adhere to the terminal contact part of
MIC, the receiver, the speaker.

• Be careful to handle AUDIO parts with electrostatics measures at the worker/in the working
place.

• Be careful not to spend a stress on the MIC side part to the utmost.

• Be careful not to pressurize the coil joint (protection Bond part) of the receiver and speaker

because they are easy of broken.

• Be careful for alien substance to approach to sound hole part of the speaker.

• Be careful sufficiently so as not to blow air with the process into the receiver, speaker/MIC

sound hole. It causes sounds being small by the diaphragm transformation or vibration.

KP220 SERVICE MANUAL V1.2

10

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SECTION 3

3

Unit Specifications

KP220 SERVICE MANUAL V1.2

11

3. UNIT SPECIFICATION

PRODUCT FEATURES AND SPECIFICATION

Solution MT6226M

Media Tek

Type Bar type
Antenna Type Internal (tri-Band)
Main Display 1.77”, 128x160
GPRS Class 10
MMS Yes, 1.1
Camera 1.3M (OV9660)
Battery 900mAh Li-ion inner pack

Audio player
FM Receiver

MPEG4/H.263 Yes (support 3GP)
H.264 No(no support)
AAC Yes
AAC+ No
FM as alarm Yes
Scheduled FM recording Yes

MP4 for incoming call/ power
on off animation and screen
saver

Loud Speaker Yes

Yes (support MP3 and AAC
playback)
Yes , US/Europe
band(87.5~108MHz)

Yes

LG Chemical

Audio player--real resuming Yes, for MP3 only
Video recording Yes

Memory Size
Internal NAND 512Mb NAND

Memory Card Micro SD
Bluetooth Yes, version 1.2
USB Yes, slave 1.1
IrMC No
WAP Yes, 2.0
Java Yes
PoC No
EMAIL

Status LED Yes
DRM No

Dictionary No
MPEG4 caller ID

128Mb NOR Flash + 64Mb
PSRAM + 512Mb NAND

No

Yes

Up to 4GB

Network Link,
Charging

KP220 SERVICE MANUAL V1.2

12

Finger handwriting No
Touch Panel No

Caption
OTA
語言學習機(AB repeat)

Music Equalizer
Image Editing
In flight mode

No
Yes
No
Yes
No
Yes

ERAL REQUIREMENT

General Requirement

Category Requirement Description Parameter Support

Shall support multiple radio bands/power

Frequency

- 850 MHz/class 4 (2W) N

- 900 MHz/class 4 (2W) Y

- 1800 MHz/class 1 (1W) Y

- 1900 MHz/class 1 (1W) Y

Antenna Shall support [Internal/External] antenna Internal Y

Shall support GPRS bearer

R98 Y

GPRS

Data
Service

Java

oice codec
Audio
decoder

- release [R#]

- multi-slot class [class #] 10 Y

- Service class [Class #] Class B Y

- Coding scheme [CSn] CS1,CS2, CS3, CS4 Y

Shall support following data transaction mode
and services.

- Fax N

- Data N

- WAP [rel #] 2.0 Y

- SMS Y

- EMS [rel #] Code 5.0 Y

- MMS [rel #] 1.1 Y

Support JAVA MIDP [ver #] 2.0 Y

Support JAVA CLDC [ver #] 1.0 Y

Shall support multiple voice codec Y

- FR Y

- EFR Y

- HR Y

- AMR NB (air link) Y

Shall support multiple audio decoders

- MP3 Y

- WMA N

KP220 SERVICE MANUAL V1.2

13

Category Requirement Description Parameter Support

- AAC Y

- AAC+ N

Physical

Display

Camera

FM radio

Battery

The physical dimension is [Length x Width x
Thickness mm]

TBD Y

The overall volume is [# cc] TBD Y
The weight is [# g] TBD Y

Shall support main display with following
characteristics:

Y

- Size 1.77” Y

- Type TFT, Transmissive Y

- Color depth 262K Y

- Pixel resolution [width x height] 128x160 Y

- Active area [W x H mm]

28.032(W) x 35.04(H)

Y

mm

Shall support high resolution camera with
following characteristics:

- Active pixel array up to resolution [ X x Y

pixels]

Y

1280x1024 Y

- Sensor type [CMOS or CCD] CMOS Y

Shall support FM radio bands

- US/Europe band 87.5~108MHz Y

- Japan band

Shall support Li-Ion battery with minimum
capacity of [mAh].
Shall support following device to connect
external devices.

76~90MHz

900mAh Y

N

Connectivity

Storage

Indication

- USB [ver, host or slave or OTG] 1.1 slave Y

- Bluetooth [ver, power class] 1.2, class 2 Y

GAP
SDAP
DUN
SPP

- Bluetooth profiles

HSP

Y
HFP
OPP
FTP
A2DP, AVRCP

Shall support mass data storage for different
multimedia content.

Y

- Build-in NAND [MB]. Used as mobile disk.
(Notes : Designed footprint shall be possible to

Y

support multiple memory capacity)

- Micro SD Y

Shall support LED for status indication.

1 Blue LED

Y

KP220 SERVICE MANUAL V1.2

14

Category Requirement Description Parameter Support

(*Table 1.) Shall support LED for charger (TA or USB) plug-in

status indication.

1 Orange LED

Y

* Battery life is Network dependent; variations may occur.
The KG195 HHP works closely with the network and the standby and talk times achieved depend
upon this. In particular the location of the HHP within the network, the type of SIM, reception of
area messages, the use of AMR, Full Rate speech, Half Rate speech or Enhanced Full Rate
speech and other factors will affect both standby and talk times.

Transmitting Frequency
Range:

Receiving Frequency
Range:

TX - RX Duplex Spacing: EGSM : 45MHz

Channel Spacing: EGSM : 200KHz

Number of Channels
(ARFCN):

Power Class:

Tx Peak Current:
GPRS Class:
GPRS Coding Scheme:
Data Rates (Packet):

Data Rates (Circuit
Switch):

EGSM : 880 - 915MHz
DCS1800 : 1710 - 1785MHz
PCS1900 : 1850 - 1910MHz
EGSM : 925 - 960MHz
DCS1800 : 1805 - 1880MHz
PCS1900 : 1930 - 1990MHz

DCS1800 : 95MHz
PCS1900 : 80MHz

DCS1800 : 200KHz
PCS1900 : 200KHz
GSM : 124 (Numbered 1 to 124) std.
EGSM : 50 (Numbered 975 to 1023 & 0)
DCS1800 : 374 (Numbered 512 to 885)
PCS1900 : 299 (Numbered 512 to 810)

EGSM : Class 4 MTS (33 +/- 2dBm)
DCS1800 : Class 1 MTS (30 +/- 2dBm)
PCS1900 : Class 1 MTS (30 +/- 2dBm)

2500mA
Class 10; Operation class B
CS1/CS2/CS3/CS4
EGSM/DCS1800/PCS1900 :
Uplink : Up to 21.4Kbps (1 slot)
Downlink : Up to 85.6Kbps (4 slots)
EGSM/DCS1800/PCS1900 : Up to 9600Kbps

KP220 SERVICE MANUAL V1.2

15

TRANSMITTER (EGSM)

RF Power Output

Power Levels 15 decrements in 2dB steps

Power Control Level 5 33dBm +/-2dB
Power Control Level 6 31dBm +/-3dB
Power Control Level 7 29dBm +/-3dB
Power Control Level 8 27dBm +/-3dB
Power Control Level 9 25dBm +/-3dB
Power Control Level 10 23dBm +/-3dB
Power Control Level 11 21dBm +/-3dB
Power Control Level 12 19dBm +/-3dB
Power Control Level 13 17dBm +/-3dB
Power Control Level 14 15dBm +/-3dB
Power Control Level 15 13dBm +/-3dB
Power Control Level 16 11dBm +/-5dB
Power Control Level 17 9dBm +/-5dB
Power Control Level 18 7dBm +/-5dB
Power Control Level 19 5dBm +/-5dB

TX Frequency Output

Low Channel (Ch 975) 880.2 MHz
Mid Channel (Ch 62) 902.4 MHz
High Channel (Ch 124) 914.8 MHz

TX Frequency Calculation (Ftx)MHz

(0 - 124)
(975 - 1023)

890 + (ARFCN x 0.2)MHz
890 + 0.2x(ARFCN - 1024)MHz

Phase and Frequency Error

Peak Phase Error < 20 degrees
RMS Phase Error < 5 degrees
Frequency Stability < +/- 90Hz

KP220 SERVICE MANUAL V1.2

16

TRANSMITTER (DCS1800)

RF Power Output

Power Levels 16 decrements in 2dB steps

Power Control Level 0 30dBm +/-2dB
Power Control Level 1 28dBm +/-3dB
Power Control Level 2 26dBm +/-3dB
Power Control Level 3 24dBm +/-3dB
Power Control Level 4 22dBm +/-3dB
Power Control Level 5 20dBm +/-3dB
Power Control Level 6 18dBm +/-3dB
Power Control Level 7 16dBm +/-3dB
Power Control Level 8 14dBm +/-3dB
Power Control Level 9 12dBm +/-4dB
Power Control Level 10 10dBm +/-4dB
Power Control Level 11 8dBm +/-4dB
Power Control Level 12 6dBm +/-4dB
Power Control Level 13 4dBm +/-4dB
Power Control Level 14 2dBm +/-5dB
Power Control Level 15 0dBm +/-5dB

TX Frequency Output

Low Channel (Ch 512) 1710.2 MHz
Mid Channel (Ch 699) 1747.6 MHz
High Channel (Ch 885) 1784.8 MHz
TX Frequency Calculation (Ftx)MHz 1710.2 + 0.2 x (ARFCN - 512) = Ftx MHz

Phase and Frequency Error

Peak Phase Error < 20 degrees
RMS Phase Error < 5 degrees
Frequency Stability < +/- 180Hz

KP220 SERVICE MANUAL V1.2

17

TRANSMITTER (PCS1900)

RF Power Output

Power Levels 16 decrements in 2dB steps

Power Control Level 0 30dBm +/-2dB
Power Control Level 1 28dBm +/-3dB
Power Control Level 2 26dBm +/-3dB
Power Control Level 3 24dBm +/-3dB
Power Control Level 4 22dBm +/-3dB
Power Control Level 5 20dBm +/-3dB
Power Control Level 6 18dBm +/-3dB
Power Control Level 7 16dBm +/-3dB
Power Control Level 8 14dBm +/-3dB
Power Control Level 9 12dBm +/-4dB
Power Control Level 10 10dBm +/-4dB
Power Control Level 11 8dBm +/-4dB
Power Control Level 12 6dBm +/-4dB
Power Control Level 13 4dBm +/-4dB
Power Control Level 14 2dBm +/-5dB
Power Control Level 15 0dBm +/-5dB

TX Frequency Output

Low Channel (Ch 512) 1850.2MHz
Mid Channel (Ch 657) 1879.2MHz
High Channel (Ch 810) 1909.8MHz
TX Frequency Calculation (Ftx)MHz 1850.2 + 0.2 x (ARFCN - 512) = Ftx MHz

Phase and Frequency Error

Peak Phase Error < 20 degrees
RMS Phase Error < 5 degrees
Frequency Stability < +/- 185Hz

KP220 SERVICE MANUAL V1.2

18

RECEIVER (EGSM)

RX Frequency Input

Low Channel (Ch 975) 925.2 MHz
Mid Channel (Ch 62) 947.4 MHz
High Channel (Ch 124) 959.8 MHz
RX Frequency Calculation (Frx)MHz
(0 - 124)
(975 - 1023)

BER (Bit Error Ratio) Type II BER <2.4% at -102dBm

F

+ 45 Mhz = F

tx

Ftx + 45 Mhz = F

Type II BER <0.1% at -15dBm

MHz

rx

MHz

rx

RECEIVER (DCS1800)

RX Frequency Input

Low Channel (Ch 512) 1805.2 MHz
Mid Channel (Ch 699) 1842.6 MHz
High Channel (Ch 885) 1879.8 MHz
RX Frequency Calculation (Frx) Ftx + 95 Mhz = F

BER (Bit Error Ratio) Type II BER <2.4% at -102dBm

Type II BER <0.1% at -23dBm

MHz

rx

RECEIVER (PCS1900)

RX Frequency Input

Low Channel (Ch 512) 1930.2MHz
Mid Channel (Ch 657) 1959.2MHz
High Channel (Ch 810) 1989.8 MHz
RX Frequency Calculation (Frx) Ftx + 80 Mhz = F

BER (Bit Error Ratio) Type II BER <2.4% at -102dBm

Type II BER <0.1% at -23dBm

MHz

rx

KP220 SERVICE MANUAL V1.2

19

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4

Introduction of

Service Level

4-1. SERVICE LEVEL 1
4-2. SERVICE LEVEL 2

Section 4

22

KP220 SERVICE MANUAL V1.2

4-1. SERVICE LEVEL 1

INTRODUCTION OF SERVICE LEVEL 1

The dealers at service level 1 will have to do the following:

1. Attend to the subscriber’s complaint. Receive the equipment for servicing from
the customer and checking that the warranty period is valid or not.

2. Check the external appearance of the main equipment, peripheral units, and
accessories.

3. Check the normal operation and performance of the main equipment, peripheral
unit, and accessories.

4. If necessary, replace detachable parts, peripheral units, and accessories that
cannot be repaired. Keep a stock of good replacement phone and accessories.

5. If necessary, explain the correct method of operation to the customer.

6. Verify any faulty reported by the end-user at 2. and 3. Above.

7. Specify the symptom and fill out the fault report.

8. Send the fault report and faulty equipment to service level 2. Ask the subscriber
to wait for the equipment to be repaired.

9. In certain cases, replace the entire main equipment.

10. Receive back the repaired equipment and carry out a final check.

11. Return the repaired and correctly functioning equipment to the end-user.

23

KP220 SERVICE MANUAL V1.2

If necessary,
explain the
correct
method of
operation to
the
customer.

Receive the equipment for

Is warranty period valid?
If not, charge the repair fee.

Physically inspect the equipment.
Check normal operation. Try to
verify the fault.

Fill out a fault report.

Fault

Yes

Send the fault report, faulty
main unit and / or repairable

accessories to Level 2.

cleared?

No

Tell the customer to wait
the estimated maximum

Is the case

urgent?

No

Wait to receive repaired
equipment from level 2.

Physical inspects the
equipment. Check normal

Return the equipment to the customer.

Yes

Flow of Service Level 1

If necessary, replace
any detachable
peripheral parts or
accessories. Discard
consumable
accessories.

Adequate stock of
good replacement
peripheral parts &

accessories

Go to Level 2

Adequate
stock of
good
replacement

Replace the
entire main
unit and

Return From Level

24

KP220 SERVICE MANUAL V1.2

TEST EQUIPMENT AND TOOLS FOR SERVICE LEVEL 1

No GSM tester and soldering are required for Service Level 1. The following

equipment and tools are recommended for this level.

1. Fully charged battery :

Use as a power source or a temporary replacement of original battery for
faulty equipment.

2. Workable SIM card :

Used for testing the performance and functions of faulty equipment.

3. Rubber :

Used for cleaning electronic contacts, such as battery terminals, etc.

4. AC Adapter :

Used for testing the charging function of faulty equipment and / or battery.

5. Simple Hands free Kit :

Used for testing the Hands free relevant functions of faulty equipment.

6. USB Cable :

Used for testing the connection between HHP and PC.

25

KP220 SERVICE MANUAL V1.2

4-2. SERVICE LEVEL 2

INTRODUCTION TO SERVICE LEVEL 2

The tasks at Service Level 2 will have to :

1. Receive the fault report and faulty equipment from Service Level 1.

2. Verify the faults reported at Level 1 and check the doubtful modular sub-units or
part.

3. Identify the faulty modular sub-unit or part.

4. Disassemble the equipment. Temporarily replace the faulty modular sub-unit or
part with a good one to see if this clears the trouble. Specify the faulty modular
sub-unit or part in the faulty report.

5. Send the fault report and faulty modular sub-unit together to Service Level 3. In
certain cases, replace the faulty modular sub-unit in the equipment with the good
one for quick repair.

6. Receive back the repair report, the repaired modular sub-unit from Service Level 3 and
re-install it in the equipment. Or keep this repaired modular sub-unit for next
replacement, if the faulty modular sub-unit had been replaced with a good one in step 5.

7. Perform the final test with a workable SIM card. Fill out the repair report.

8. Return the equipment to Service Level 1 with the repair report.

26

KP220 SERVICE MANUAL V1.2

y

Receive the fault report, faulty equipment.

Verify the faults reported at Service Level 1

Disassemble the equipment.

Temporarily replace the faulty modular sub-unit or

trouble.

Fill out the fault report. Send the fault report
and fault

In certain cases, replace the faulty modular sub­unit in the equipment with the good one.

Receive back the repair report, the repaired
modular sub-unit from Service Level 3.

Keep as buffer stock for next replacement.

modular sub-unit together to

Had the faulty
equipment been

Fault

cleared?

Yes

lears the part with a good one to see if this c

Yes

-

No

Flow of Service Level 2

Go to Level 3

Return from Level 3

Re-install the
repaired modular
sub-unit in the

No

equipment. Perform
final test and fill out

Return the equipment to
Service Level 1 with the
repair report.

27

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5

Section 5

Circuit

Description

5-1. LOGIC BLOCK DIAGRAM
5-2. LOGIC

5-1. LOGIC BLOCK DIAGRAM

5-2. LOGIC

LOGIC AND BASE BAND PORTION

5-2-1. INTRODUCTION

The logic part of 7332 phone is based on Leonardo that is MTK Systems platform.
The circuit comprises the following main functional blocks:

• Memory Subsystem

• Baseband CPU(MTK6226M):

RISC ARM7EJ-STM

• MT6305: PMIC handles all baseband power

• FM Radio IC(SI4703)

• Main LCM (262K TFT)

• Camera (1.3M pixels CMOS sensor)

• Bluetooth(BC313141A18)

• TOSHIBA MCP(128+32+512MB)

• User I/O (KEY,MINI SD CARD,USB Client, SIM card )

Baseband Controller, 52MHz 32bit

5-2-2. SYSTEM BLOCK DIAGRAM

KP220 SERVICE MANUAL V1.2