LG KP220 Service Manual

Manual Service

KP220 : Model

Internal Use Only

Service Manual

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	Second
				draft Issue
	Draft 1.3	18.02.2008	All for Publication	Third draft
				Issue

KP220 SERVICE MANUAL V1.2

1

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SECTION 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

2

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SECTION 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

3

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SECTION 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	LG Chemical
Audio player	Yes (support MP3 and AAC
	playback)
FM Receiver	Yes , US/Europe
	band(87.5~108MHz)
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	Yes
saver
Loud Speaker	Yes
Audio player--real resuming	Yes, for MP3 only
Video recording	Yes
Memory Size	128Mb NOR Flash + 64Mb
	PSRAM + 512Mb NAND
Internal NAND	512Mb NAND
Memory Card	Micro SD	Up to 4GB
Bluetooth	Yes, version 1.2
USB	Yes, slave 1.1
IrMC	No
WAP	Yes, 2.0
Java	Yes
PoC	No
EMAIL	No
Status LED	Yes	Network Link,
		Charging
DRM	No
Dictionary	No
MPEG4 caller ID	Yes
	KP220 SERVICE MANUAL V1.2

12

Finger handwriting	No
Touch Panel	No
Caption	No
OTA	Yes
(AB repeat)	No
Music Equalizer	Yes
Image Editing	No
In flight mode	Yes

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
	GPRS	- release [R#]	R98	Y
		- 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
		- Data		N
	Service	- WAP [rel #]	2.0	Y
		- SMS		Y
		- EMS [rel #]	Code 5.0	Y
		- MMS [rel #]	1.1	Y
	Java	Support JAVA MIDP [ver #]	2.0	Y
		Support JAVA CLDC [ver #]	1.0	Y
	oice codec	Shall support multiple voice codec		Y
	Audio
		- FR		Y
	decoder
		- 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
		The physical dimension is [Length x Width x	TBD	Y
		Thickness mm]
	Physical
		The overall volume is [# cc]	TBD	Y
		The weight is [# g]	TBD	Y
		Shall support main display with following		Y
		characteristics:
		- Size	1.77”	Y
	Display	- 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		Y
		following characteristics:
	Camera	- Active pixel array up to resolution [ X x Y	1280x1024	Y
		pixels]
		- Sensor type [CMOS or CCD]	CMOS	Y
		Shall support FM radio bands
	FM radio
		- US/Europe band	87.5~108MHz	Y
		- Japan band	76~90MHz	N
	Battery	Shall support Li-Ion battery with minimum	900mAh	Y
		capacity of [mAh].
		Shall support following device to connect
		external devices.
		- USB [ver, host or slave or OTG]	1.1 slave	Y
		- Bluetooth [ver, power class]	1.2, class 2	Y
	Connectivity		GAP
			SDAP
			DUN
			SPP	Y
		- Bluetooth profiles	HSP
			HFP
			OPP
			FTP
			A2DP, AVRCP
		Shall support mass data storage for different		Y
		multimedia content.
	Storage	- Build-in NAND [MB]. Used as mobile disk.
		(Notes : Designed footprint shall be possible to		Y
		support multiple memory capacity)
		- Micro SD		Y
	Indication	Shall support LED for status indication.	1 Blue LED	Y

KP220 SERVICE MANUAL V1.2

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Category	Requirement Description	Parameter	Support
(*Table 1.)	Shall support LED for charger (TA or USB) plug-in	1 Orange LED	Y
	status indication.

* 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	EGSM	: 880 - 915MHz
Range:	DCS1800 : 1710 - 1785MHz
	PCS1900 : 1850 - 1910MHz
Receiving Frequency	EGSM	: 925 - 960MHz
Range:	DCS1800 : 1805 - 1880MHz
	PCS1900 : 1930 - 1990MHz
TX - RX Duplex Spacing:	EGSM	: 45MHz
	DCS1800	: 95MHz
	PCS1900	: 80MHz
Channel Spacing:	EGSM	: 200KHz
	DCS1800	: 200KHz
	PCS1900	: 200KHz
Number of Channels	GSM	: 124 (Numbered 1 to 124) std.
(ARFCN):	EGSM	: 50 (Numbered 975 to 1023 & 0)
	DCS1800 : 374 (Numbered 512 to 885)
	PCS1900 : 299 (Numbered 512 to 810)
Power Class:	EGSM	: Class 4 MTS (33 +/- 2dBm)
	DCS1800 : Class 1 MTS (30 +/- 2dBm)
	PCS1900 : Class 1 MTS (30 +/- 2dBm)
Tx Peak Current:	2500mA
GPRS Class:	Class 10; Operation class B
GPRS Coding Scheme:	CS1/CS2/CS3/CS4
Data Rates (Packet):	EGSM/DCS1800/PCS1900 :
	Uplink	: Up to 21.4Kbps (1 slot)
	Downlink : Up to 85.6Kbps (4 slots)
Data Rates (Circuit	EGSM/DCS1800/PCS1900 : Up to 9600Kbps
Switch):

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		890 + (ARFCN x 0.2)MHz
	(0 - 124)
	(975 - 1023)		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

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	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	Ftx + 45 Mhz = Frx MHz
	(0 - 124)
	(975 - 1023)	Ftx + 45 Mhz = Frx MHz

BER (Bit Error Ratio)	Type II BER <2.4% at -102dBm
	Type II BER <0.1% at -15dBm

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 = Frx MHz

BER (Bit Error Ratio)	Type II BER <2.4% at -102dBm
	Type II BER <0.1% at -23dBm

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 = Frx MHz
BER (Bit Error Ratio)	Type II BER <2.4% at -102dBm
	Type II BER <0.1% at -23dBm

KP220 SERVICE MANUAL V1.2

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4

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Section 4

Introduction of

Service Level

4-1. SERVICE LEVEL 1

4-2. SERVICE LEVEL 2

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

Receive the equipment for

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

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	cleared?
	No

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

accessories to Level 2.

Tell the customer to wait the estimated maximum

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 main units

Is the case	Yes		Replace the
urgent?			entire main
			unit and
No			accessories
Wait to receive repaired
equipment from level 2.
Physical inspects the
equipment. Check normal			Return From Level

Return the equipment to the customer.

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.

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KP220 SERVICE MANUAL V1.2

Receive the fault report, faulty equipment.

Flow of Service Level 2

Verify the faults reported at Service Level 1 and identify the doubtful modular sub-units

Disassemble the equipment.

Temporarily replace the faulty modular sub-unit or part with a good one to see if this clears the trouble.

Fault	No
cleared?
Yes
		Go to Level 3
Fill out the fault report. Send the fault report
and faulty modular sub-unit together to

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

		Return from Level 3
Receive back the repair report, the repaired
modular sub-unit from Service Level 3.
			Re-install the
			repaired modular
Had the faulty	No		sub-unit in the
			equipment. Perform
equipment been
			final test and fill out
Yes			the repair report
			Return the equipment to
Keep as buffer stock for next replacement.
			Service Level 1 with the
			repair report.
		27

5

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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): Baseband Controller, 52MHz 32bit

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 )

5-2-2. SYSTEM BLOCK DIAGRAM

KP220 SERVICE MANUAL V1.2