5-8
Troubleshooting
5.8 Backlight Trouble
START
In the test mode,
select 'Function Test'
then 'LED' then
'Key Backlight'
Defected key
backlight.
Defected
indicator.
Re-mount R700,
701,702.
Replace battery.
R700,701,702 is
well connected?
Voltage value
of LED is same as the voltage
value of battery?
Replace
D700~D709
U702
(pin3.6) voltages level
are higher than
0.7V
Re-solder U702.
R707 is well
connected?
R704 is well
connected?
Re-mount
R707.
Re-mount
R704.
END
END
NO
NO
YES
YES
NO
YES
NO
NO
YES
YES
Note:
To enter the Test mode, press *789 # on the phone,
then hold down# key.
Summary of Contents for V310
Page 1: ...GPRS PHONE SERVICE MANUAL MODEL V310 ...
Page 2: ...Rev 1 00 ...
Page 6: ...1 2 Introduction Memo ...
Page 16: ...3 5 Disassembly Instruction 3 4 Exploded View and Parts List 3 4 1 Exploded View Main ...
Page 17: ...3 6 Disassembly Instruction 3 4 2 Exploded View Folder ...
Page 43: ...5 20 Troubleshooting Memo ...
Page 44: ...6 1 6 Block Diagram 6 1 BB Block Diagram ...
Page 45: ...6 2 Block Diagram 6 2 RF Block Diagram ...
Page 46: ...6 3 7 Schematic Diagram 7 1 Key Pad ...
Page 47: ...7 2 Schematic Diagram 7 2 Main Board 7 2 1 Chipset Calypso IOTA ...
Page 48: ...7 3 Schematic Diagram 7 2 2 Memory Melody Charger ...
Page 49: ...7 4 Schematic Diagram 7 2 3 Audio ...
Page 50: ...7 5 Schematic Diagram 7 2 4 I O B d to LCD Connector SIM Interface ...
Page 51: ...7 6 Schematic Diagram 7 2 5 Camera ...
Page 52: ...7 7 Schematic Diagram 7 3 RF Schematic 7 3 1 RF PAM ...
Page 53: ...7 8 Schematic Diagram 7 3 2 RF Main IC ...
Page 54: ...7 9 Schematic Diagram Memo ...
Page 55: ...8 1 8 PCB Diagram 8 1 Main PCB Top View ...
Page 56: ...8 2 PCB Diagram Bottom View ...
