LG GB160 User manual

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GB160
Service Manual
LG Electronics

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Table Of Contents
1. INTRODUCTION…………………...3
1.1 Purpose…………………………………3
1.2 Regulatory Information………………..3
2. PERFORMANCE…………………..5
2.1 H/W Features…………………………..5
2.2 S/W Features…………………………..6
3. TECHNICAL BRIEF………………19
3.1 Digital Main Processor( MT6223 )……….19
3.2 Power Amplifier Module( SKY77518 )…....27
3.3 Transceiver Module( AD6548 )…………..28
3.4 Memory Module ( TV00570002CDGB) ……..31
3.5 FM Radio Module (Si4708)………….34
3.6 Antenna Switch Module ( B9308 )……...36
3.7 LCD Interface………………………....37
3.8 SIM Card Interface…..……………….39
3.9 KEYPAD Interface……………….…...40
3.10 Battery Charging Block Interface….41
3.11 Audio Interface……………….….…..42
3.12 Vibrator Interface….………………...43
3.13. Key LED Interface………………….44
4. TROUBLE SHOOTING………….45
4.1 Power On Trouble……………………45
4.2 SIM Card Trouble…………………….48
4.3 Vibrator Trouble………………………50
4.4 Keypad Trouble………………………52
4.5 RTC Trouble………………………….54
4.6 Key Backlight Trouble……………….56
4.7 LCM Backlight Trouble……………...58
4.8 LCM Trouble……………….………...60
4.9 Microphone Trouble…………………62
4.10 Receiver Trouble…………………...64
4.11 Speaker Trouble……………….67
4.12 Headphone Trouble…………...70
4.13 Charging Trouble……………...73
4.14 FM Radio Trouble……………..75
4.15 RF Trouble……………………..77
5. DOWNLOAD………………....89
5.1 Download setup…………………89
5.2 Download Process……………...90
6. BLOCK DIAGRAM…………...98
7. CIRCUIT DIAGRMA………….99
8. BGA IC PIN Check…………104
9. PCB LAYOUT………………..106
10.ENGINEERING MODE…….107
11. CALIBRATION……………..111
11.1 Test Equipment Setup……….111
11.2 Calibration Steps……………..112
12. STAND ALONE TEST…….151
12.1 Test Configuration……………151
12.2 META tool Install process…...152
12.3 Rx Test………………………...156
12.4 Tx Test…………………………158
13. EXPLODED VIEW&
REPLACEMENT PART LIST....160
13.1 Exploded View………………..160
13.2 Replacement Part…………….162

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1. INTRODUCTION
1.1Purpose
This manual provides information necessary to repair, description and download the features
of this model.
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 are 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
dose not warrant that this product is immune from the above case but will prevent unauthorized
use of common-carrier telecommunications service of facilities accessed through or connected
to it.
The manufacturer 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 to customer is faulty and
possibly causing harm or interruption in service to the telephone network, it should disconnect
telephone service until repair can be done. A telephone company may temporarily disconnect
service as long as repair is not done.
C. 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 the 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.
D. Maintenance Limitations
Maintenance limitations on this model must be performed only by the manufacturer or its
authorized agent . The user may not make any changes and/or repairs expect as specifically
noted in this manual.
Therefore, note that authorized alternations or repair may affect the regulatory status of the
system and may void any remaining warranty.

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E. 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.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look
slightly different.
G. Interference and Attenuation
Phone may interfere with sensitive laboratory equipment, medical equipment, etc.
Interference from unsuppressed engines or electric motors may cause problems.
H. Electrostatic Sensitive Devices
ATTENTION
Boards, which contain Electrostatic Sensitive Devices(ESD),are indicated by the
sign .
Following information is ESD handing:
. 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
packages as
described.

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2. PERFORMANCE
2.1 H/W Features
Solution MT6223D Media Tek
Form Factor Bar type
Dimension (mm) 103x46x12.5 mm
RF Band Dual Band 900/1800 or Dual Band
850/1900 Internal Antenna
Data GPRS Class 10
Main Display 1.5” TFT 262K color, 128x128 Pixels
Serial Interface
Battery 950 mA h Same as
LG6/7/Sapphire-F
Audio player Yes MP3/64
polyphonic Midi
FM Receiver Yes , US/Europe band Option
(87.5~108MHz)
Loud Speaker Yes
Memory Size 128Mb NOR Flash +32Mb PSRAM
User Memory Yes 2M Bytes
Scheduled FM recording Yes
FM as alarm Yes
WAP Yes V2.0
MMS Yes
OTA Yes
In flight mode
Yes