5-15
Troubleshooting
NO
YES
Check :
· U201 soldering
· U201 pin 26, 32 DC 2.85V
Replace U201 if defective.
Check
U201 pin 22
Frequency = 1747.8 MHz
Power
≥
≥
≥
≥
-10dBm
Check
Power Amp U101 output [C110]
Frequency = 1747.8 MHz
Power
≥
≥
≥
≥
10dBm
Check :
· U101 soldering
· U101 pin 42, 43 VBAT DC voltage ( > 3.3V)
· U101 pin 45 PA_LEVEL signal (> 0.7V)
Replace U101 if defective.
NO
YES
NO
YES
YES
YES
Check
ANT switch U100 pin 8
Frequency = 1747.8 MHz
Power
≥
≥
≥
≥
10dBm
Check :
· U100 soldering
· U100 pin 6 low voltage
· U100 pin 1 high voltage
Replace U100 if defective.
Check :
• RF connector ANT101 soldering.
END
Содержание V310
Страница 1: ...GPRS PHONE SERVICE MANUAL MODEL V310 ...
Страница 2: ...Rev 1 00 ...
Страница 6: ...1 2 Introduction Memo ...
Страница 16: ...3 5 Disassembly Instruction 3 4 Exploded View and Parts List 3 4 1 Exploded View Main ...
Страница 17: ...3 6 Disassembly Instruction 3 4 2 Exploded View Folder ...
Страница 43: ...5 20 Troubleshooting Memo ...
Страница 44: ...6 1 6 Block Diagram 6 1 BB Block Diagram ...
Страница 45: ...6 2 Block Diagram 6 2 RF Block Diagram ...
Страница 46: ...6 3 7 Schematic Diagram 7 1 Key Pad ...
Страница 47: ...7 2 Schematic Diagram 7 2 Main Board 7 2 1 Chipset Calypso IOTA ...
Страница 48: ...7 3 Schematic Diagram 7 2 2 Memory Melody Charger ...
Страница 49: ...7 4 Schematic Diagram 7 2 3 Audio ...
Страница 50: ...7 5 Schematic Diagram 7 2 4 I O B d to LCD Connector SIM Interface ...
Страница 51: ...7 6 Schematic Diagram 7 2 5 Camera ...
Страница 52: ...7 7 Schematic Diagram 7 3 RF Schematic 7 3 1 RF PAM ...
Страница 53: ...7 8 Schematic Diagram 7 3 2 RF Main IC ...
Страница 54: ...7 9 Schematic Diagram Memo ...
Страница 55: ...8 1 8 PCB Diagram 8 1 Main PCB Top View ...
Страница 56: ...8 2 PCB Diagram Bottom View ...