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5. Data Kit & Test Method
✔
U208 soldering check
✔
U208 pin 5 DC 2.8V check
✔
U208 pin 3 control signal check
( >= 1Vp-p )
✔
U208 4 Low Voltage check
✔
U208 7 High Voltage check
✔
U208 change another same one
TX VCO
U208 pin 10
Frequency & Power check
Frequency = 1747.8MHz &
Power >= -15dBm
✔
U103 soldering check
✔
U103 pin 4 LOW Voltage check
✔
U103 pin 14 HIGH Voltage check
✔
U103 pin 11 LOW Voltage check
✔
U103 change another same one
ANT switch
U203 pin 2
Frequency & Power check
Frequency = 1747.8MHz &
Power >= 15dBm
REMARKS
1. Call connection :
TEM3 execution
ti Enter
tms1 Enter
txpw 1 102 Enter
rfpw 1 700 Enter
rfpw 1 700 Enter
rfe 7
Enter
2. Spectrum analyzer : SPAN = 1MHz
VBW = 1MHz
RBW = 3MHz
Press the trace button of spectrum analyzer on checking
test and press the max hold of spectrum analyzer
3. Oscilloscope :
500mV/div , 2ms/div
✔
RF Connector U107 soldering
check
✔
RF Connector chip check
✔
Matching network L101, L105,
C108 soldering check
END
✔
U100, U101 soldering check
✔
U100 pin 4 VBAT DC Voltage
check ( > 3.3V )
✔
U101 pin 1 DC Voltage check
( > 3.3V)
✔
U101 pin 3 TXON HIGH Voltage
check
✔
U101 pin 4 BSW HIGH Voltage
check
✔
U101 pin 8 Vapc signal check
✔
U101 pin 2 1747.8MHz freq &
power check
✔
U102 coupler input, output
Freq & Power check
✔
U100, U101,102 change
another same one
Power AMP
U100 pin 3
Frequency & Power check
Frequency = 1747.8MHz &
Power >= 18dBm
NO
NO
NO
YES
YES
YES
YES
YES
Содержание LG-600
Страница 1: ...GSM Phone SERVICE MANUAL MODEL LG 600 SERVICE MANUAL MODEL LG 600 ...
Страница 2: ......
Страница 42: ... 40 6 PCB Diagram Testpoint Description LG 600 KEY BOARD LAYER 1 ...
Страница 43: ...6 PCB Diagram Testpoint Description 41 LG 600 KEY BOARD LAYER 4 ...
Страница 44: ... 42 LG 600 MAIN BOARD LAYER 1 ...
Страница 45: ... 43 6 PCB Diagram Testpoint Description LG 600 MAIN BOARD LAYER 8 ...
Страница 46: ... 44 ...
Страница 47: ... 45 7 Block Diagram 7 Block Diagram 7 1 BB Block Diagram ...
Страница 48: ... 46 7 2 RF Block Diagram ...
Страница 49: ... 47 8 Schematic Diagram 8 Schematic Diagram 8 1 Key Pad LCD Interface Earphone ...
Страница 50: ... 48 8 2 Main Board 8 2 1 Baseband Ulysse Omega ...
Страница 51: ... 49 8 Schematic Diagram 8 2 2 Memory Devices ...
Страница 52: ... 50 8 2 3 Audio Peripheral Circuit ...
Страница 53: ... 51 8 Schematic Diagram 8 2 4 I O B to B Connector Interface ...
Страница 54: ... 52 8 3 RF Top Schematic 8 3 1 RF Front End ...
Страница 55: ... 53 8 Schematic Diagram 8 3 2 RF Main ...
Страница 56: ... 54 ...
Страница 72: ... 70 ...