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Check
1'st LO VCO U201 pin 10
frequency & power.
Frequency = 1229.4 MHz
Power
≥
-21dBm
Check
VC-TCXO U200 pin 3 13 MHz
oscillation.
Frequency = 13.00 MHz
Power
≥
-15dBm
Check BPF2 soldering.
Replace BPF2 if defective.
NO
YES
YES
NO
NO
END
Check
RF Mainchip
U203 pin 44, 45, 46, 47
I/Q signal
≥
DC 0.9V &
0.3Vp-p
Check
2'st LO VCO U201 pin 23
frequency & power.
Frequency = 564.0MHz
Power
≥
-16dBm
NO
YES
YES
NO
NO
YES
Check :
• U200 soldering
• U200 pin 4 DC 3.0V + - 5%
• U200 pin 3 DC 1.4V + - 0.1V
Replace U200 if defective.
Check :
• U201 soldering
• U201 pin 11, 17, 24 DC 3.0V
Replace U201 if defective.
Check U203 soldering.
Replace U203 if defective.
Check :
• U201 soldering
• U201 pin 11, 17, 24 DC 3.0V
Replace U201 if defective
Check :
• U203 Pin soldering
• Ulyses-Nausca
• S/W
YES
Check
GSM RF SAW
2'nd FILTER BPF2 pin 4 or 6
frequency & power.
Frequency = 947.4MHz
Power
≥
-62dBm
YES
Check
IF SAW Filter BPF1 pin 1 or 2
frequency & power.
Frequency =282MHz
Power
≥
-63dBm
Содержание VG207
Страница 1: ...GSM PHONE SERVICE MANUAL MODEL VG207 ...
Страница 2: ...ISSUED DATE 2003 08 23 Rev 1 0 ...
Страница 13: ...3 4 Exploded View and Parts List 3 4 1 Exploded View 25 ...
Страница 40: ...Memo ...
Страница 42: ...6 Block Diagram 6 1 BB Block Diagram 6 1 ...
Страница 43: ...6 2 Block Diagram 6 2 RF Block Diagram ...
Страница 44: ...7 Schematic 7 1 RF PAM Block 7 1 ...
Страница 45: ...7 2 Schematic Diagram 7 2 RF Main Block ...
Страница 46: ...7 3 Schematic Diagram 7 3 Flash Audio Block ...
Страница 47: ...7 4 Schematic Diagram 7 4 Peripheral Block ...
Страница 48: ...7 5 Schematic Diagram 7 5 Base Band Block ...
Страница 49: ...7 6 Schematic Diagram 7 6 Folder Block ...
Страница 50: ...7 7 Schematic Diagram 7 7 Key Pad Block ...
Страница 51: ...7 8 Schematic Diagram 7 8 Battery Charger Block ...
Страница 52: ...8 PCB Diagram 8 1 Main PCB 8 1 TOP ViIEW COMP ...
Страница 53: ...8 2 PCB Diagram BOTTOM VIEW COMP ...
Страница 54: ...8 3 PCB Diagram 8 2 Folder PCB TOP VIEW COMP ...
Страница 55: ...8 4 PCB Diagram BOTTOM VIEW COMP ...
Страница 56: ...8 5 PCB Diagram 8 3 Key Pad PCB TOP VIEW COMP ...
Страница 57: ...8 6 PCB Diagram BOTTOM VIEW COMP ...
Страница 58: ...8 7 PCB Diagram 8 4 Battery Charger PCB TOP VIEW COMP ...
Страница 59: ...8 8 PCB Diagram BOTTOM VIEW COMP ...
Страница 70: ...Memo ...