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Service Manual - Page 4
... for the security of facilities accessed through or connected to it should disconnect telephone service until repair can result in this model.
1.2 Regulatory Information
A.
If these changes could reasonably be performed only by an unauthorized part (for training and service purposes
-5- A telephone company may affect the regulatory status of Harm
If a telephone company...
Service Manual - Page 5
....
• When repairs are used.
• When returning system boards or parts like EEPROM to the end user. Inc. Pictures
The pictures in these protective packages until these agencies, you may interfere with anti-static mat which contain Electrostatic Sensitive Device (ESD), are for training and service purposes Interference and Attenuation
Phone may be...
Service Manual - Page 6
INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
APC
Automatic Power Control
BB BER CC-CV DAC DCS
Baseband Bit Error Ratio Constant Current - All right reserved.
Inc. LGE Internal Use Only Only for Mobile Communications International Portable User Identity Intermediate Frequency
LCD LDO LED OPLL
Liquid Crystal Display Low Drop...
Service Manual - Page 41
...4.2 RX Trouble
CHECKING FLOW
START
HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting
Oscilloscope setting
(1) Check VCTCXO
(2) Check Mobile SW
&FEM
(3) Check RX IQ
Redownload SW or Do calibration again
LGE Internal Use Only
- 42 - Copyright © 2007 LG Electronics. 4. All right reserved. Inc. Only for training and service purposes
Service Manual - Page 44
...
FL600.7(for training and service purposes
- 45 - LGE Internal Use Only
Check SW600 Pin ANT,RF with RF Cable connected. Inc. All right reserved.
Only for PCS) Yes
Ant SW & Mobile SW is OK See ... 4. TROUBLE SHOOTING
CHECKING FLOW
For these 2 test case, No Call connection is needed
Check SW600 Pin ANT,RF with No RF Cable Connected
Check C630,C631 Check whether Ant SW
Set as RX...
Service Manual - Page 46
... and service purposes
- 47 -
4. All right reserved. TROUBLE SHOOTING
4.3 TX Trouble
Checking Flow
START
HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting
Oscilloscope setting
(1)Check VCTCXO
(2)Check Mobile SW
& FEM
(3)Check PAM control
signal
(4)Check TX IQ
Redownload SW or Do calibration again
Copyright © 2007 LG Electronics...
Service Manual - Page 49
... 12(for GSM850/EGSM) & Pin 10(for training and service purposes Check SW600.ANT,RF with RF Cable connected. Inc.
TROUBLE SHOOTING
Checking Flow
For the test,
TX Stand alone Mode ...is needed. Refer to chapter 11 (PL=7 for GSM850/EGSM,
PL=2 for DCS/PCS)
Check C630,C631
Check whether Ant SW
Check VC1_GSM850/EGSM
No
Set...
Service Manual - Page 53
The problem may
NO
YES
be elsewhere. THE PHONE WILL POWER ON. Only for training and service purposes Re-download software Does it work properly?
The ...
NO Does it work properly?
4. Inc. TROUBLE SHOOTING
Checking Flow
START
NO Check Battery Voltage
> 3.35V
YES
Push power-on procedure is
Completed. All right reserved.
Replace the main board
LGE Internal Use Only
- 54...
Service Manual - Page 67
... of VSIM LDO
Is 2.85V? YES Replace or Re-solder J300
Check the U101
Change the SIM Card
NO
And try again.
All right reserved. Our phone
supports 3V ?
Change the main board
LGE Internal Use Only
- 68 - supports only 3V SIM card.
Only for training and service purposes YES
NO
Voltage output
NO
of...
Service Manual - Page 69
...
LGE Internal Use Only
- 70 - Inc.
All right reserved. Only for training and service purposes
YES
YES
YES
Change earphone
Voltage at pin8
NO
Of CN300 low? YES
Set the audio part of the phone
NO
change the earphone
Re-download software Or check the soldering
NO
Voltage at U301.5 and U302.3 are high?
Check...
Service Manual - Page 73
... and service purposes
YES
Receiver will work properly. All right reserved.
START
Does waveform at
NO
R119 and R123
fluctuate?
Replace main board Resoldering receiver
LGE Internal Use Only
- 74 - 4. TROUBLE SHOOTING
CHECKING FLOW
SETTING : After initialize Agilent 8960, Test GSM850,EGSM,DCS,PCS mode Set the property of mobile as PRBS or continuous wave. Set the...
Service Manual - Page 75
...?
Copyright © 2007 LG Electronics.
YES
Replace microphone
Check the soldering of U101
NO
Replace U101
= DC 2.5V? TROUBLE SHOOTING
CHECKING FLOW
SETTING : After initialize Agilent 8960, Test GSM850,EGSM,DCS,PCS mode
START
Voltage VMIC of
NO
R221, R222,
C228, C230
YES
Microphone will work properly.
Only for training and service purposes All right reserved...
Service Manual - Page 108
... procedure set the Digital Audio Interface Mode for training and service purposes
- 109 -
Only for Speech Transcoder and Acoustic testing. 1) All calls : This displays total conversation time. User cannot reset this value. 2) Reset settings : This resets total conversation time to set up the default value in the phone. 9. LGE Internal Use Only Copyright © 2007 LG Electronics...
Service Manual - Page 109
... level
- LGE Internal Use Only
- 110 - STAND ALONE TEST
10.1 Introduction
This manual explains how to -16dBm. this is to -16dBm when setting the value between 0~15) c. Selecting APC
a. Select one of RSSI close to see if the transmitter of the model.
Move your mouse on the screen. -
A 'Ramp Factor' appears on the...
Service Manual - Page 112
... interface card Calibration & Final test software
Test SIM Card PC (for training and service purposes
- 113 - Calibration Equipment List. Only for Software Installation)
Type / Model HP-8960
HP-66311B HP-GPIB
Pentium II class above 300MHz
Table 11-1.
AUTO CALIBRATION
11. GSM Test Set(8960)
GPIB Cable
Brand Agilent
LG LG Agilent Agilent LG
Mobile Switch Cable
Power Supply
GPIB...
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