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Table of Contents
Related Manuals for Lenovo i909
Summary of Contents for Lenovo i909
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Page 1: Mobile Phone
Ienovo i909 Mobile Phone Maintenance Manual LENOVO... - Page 2 September 7, 2007 File No.: Status: Preface This is an instruction manual used as a maintenance guide for Lenovo I909 both during producing and after sale. This manual is subject to modifications as is deemed necessary by further technological development.
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Page 3: Table Of Contents
4.3.1 Switch Spectrum and Ramp Mask overrun ..............24 4.3.2 Significant frequency error ....................25 4.3.3 Significant phase error ......................25 4.3.4 Power output problems ....................26 ASSEMBLY AND DISASSEMBLY OF THE I909..............28 909 A ................28 ECHNICAL TEPS FOR I SSEMBLY 909 P ......................30... - Page 4 LENOVO I908 Mobile Phone Maintenance Manual Date of Edition Compiled by/ compilatio Reasons for Main Changes Modified by n/modifica modification tion Page 4...
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Page 5: Phone Exterior
1 Phone Exterior Figure 1.1 Frontal view of the unit... - Page 6 LENOVO I908 Mobile Phone Maintenance Manual Figure 1.2 Figure 1.2 Rear view of the unit (battery removed) Page 6...
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Page 7: Main Board Layout
LENOVO I908 Mobile Phone Maintenance Manual 2 Main Board Layout Component Side Baseband Chip Receiver Contact Power Management Double-SPK Pin Connector Page 7... - Page 8 LENOVO I908 Mobile Phone Maintenance Manual Keypad Side: Camera LCD Connector Keypad FPC MMC Card Socket Stand-by Battery Vibration Motor I0 Connector SIM Card Socket Page 8...
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Page 9: Baseband
LENOVO I908 Mobile Phone Maintenance Manual 3 Baseband 3.1 LCD Display 3.1.1 No display after the phone is turned on The screen does Check the FPC and the main board connection. Re-connect and try again Check such soldering problems as pseudo soldering and... -
Page 10: The Lcd Backlight Does Not Come On
LENOVO I908 Mobile Phone Maintenance Manual 3.1.2 The LCD backlight does not come on backlight inactive Check the FPC and the main board connection. Re-connect and try again Check such soldering problems as pseudo soldering and bridging at the ports of the... -
Page 11: Ringing And Vibration
LENOVO I908 Mobile Phone Maintenance Manual 3.2 Ringing and Vibration 3.2.1 The unit does not vibrate unit Check for the connection of Replace motor Page 11... -
Page 12: No Ringing Sound
LENOVO I908 Mobile Phone Maintenance Manual 3.2.2 No ringing sound ringing Identify the SPK that makes no Check sound. speaker connection or replace the speaker. Try again to see if it functions Check whether U1205, U1206 U1207 function normally Replace U1206... -
Page 13: Charging
LENOVO I908 Mobile Phone Maintenance Manual 3.3 Charging 3.3.1 The charger has been connected to the phone, but there is no charging display on the screen charging prompt after Is there still a problem Replace when another charger is Is there still a problem... -
Page 14: The Screen Shows That The Phone Is Charging, But The Battery Cannot Be Fully Charged
LENOVO I908 Mobile Phone Maintenance Manual 3.3.2 The screen shows that the phone is charging, but the battery cannot be fully charged The charging indictor Check for soldering faults U1408, J1301 U1402. Touch up and try Y Replace U1408. Replace U1402. -
Page 15: Keypad And Keypad Backlight
LENOVO I908 Mobile Phone Maintenance Manual 3.4 Keypad and Keypad Backlight 3.4.1 The keypad does not work normally Disassemble mobile phone to check the connection of keypad FPC and pseudo Open up the phone and check if the metal dome is... -
Page 16: The Keypad Backlight Is Inactive
LENOVO I908 Mobile Phone Maintenance Manual 3.4.2 The keypad backlight is inactive keypad Replace Some damaged Check the FPC for possible pseudo Replace Page 16... -
Page 17: In Call Issues
LENOVO I908 Mobile Phone Maintenance Manual 3.5 In Call Issues 3.5.1 The voice of the person on the other end of the line can’t be heard The voice Replace Remove the upper cover and check Replace Page 17... -
Page 18: The Person On The Other End Of The Line Can't Hear My Voice
LENOVO I908 Mobile Phone Maintenance Manual 3.5.2 The person on the other end of the line can’t hear my voice My voice can’t Ｙ Remove the lower cover Re-so and check MIC for any lder Ｎ Replace the MIC and try ＯＫ... -
Page 19: The Phone Cannot Be Powered On
LENOVO I908 Mobile Phone Maintenance Manual 3.6 The Phone cannot be Powered on Firstly check U1402 for pseudo Re-solder soldering. Is output U1402 VTCXO, VCORE, VMEM and Is U2107 normal at Check Check for pseudo U2106 26MHz? circuit ld i... -
Page 20: Radiofrequency (Rf)
LENOVO I908 Mobile Phone Maintenance Manual 4 Radiofrequency (RF) 4.1 Problems during Software Download Problem: The software cannot be downloaded properly. Causes: The baseband chip has been fitted the wrong way round or there are problems with the soldering point; Pseudo soldering on CRYSTAL. -
Page 21: Production Calibration
LENOVO I908 Mobile Phone Maintenance Manual 4.2 Production Calibration 4.2.1 AFC calibration Problem：AFC calibration failed. Causes: RF test cable is not connected properly during calibration; the crystal and its peripheral circuits (AFC power supply) have been fitted the wrong way round or there are problems with the soldering points. -
Page 22: Rx Path Loss
LENOVO I908 Mobile Phone Maintenance Manual 4.2.2 Rx path loss Problem：Rx path loss calibration failed. Causes: RF test cable is not connected properly during calibration; Pseudo soldering with assemblies on the receiver channel, such as the antenna connector, antenna switch, saw filter and the surrounding peripheral capacitors. - Page 23 LENOVO I908 Mobile Phone Maintenance Manual Problem：PCL Calibration failed. Causes: RF test cable is not connected properly during calibration; PA has been attached the wrong way round; PA and the surrounding circuits have soldering-point problems; chips on the RF input circuits of the PA are displaced. Circuits are short connected with the shielding frame.
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Page 24: Testing Of The Unit/Problems During Repair
LENOVO I908 Mobile Phone Maintenance Manual Problem 3: Problem: After several times of calibration, the output power is still higher than normal. And then PA is damaged. Cause of the Problem: PA and chips of VAPC input assemblies are out of position. PA is damaged. -
Page 25: Significant Frequency Error
LENOVO I908 Mobile Phone Maintenance Manual 4.3.2 Significant frequency error Problem: Frequency errors during the testing of the unit exceed norms. Cause of the Problem: 1) Problems with AFC calibration 2) Crystal was reversely attached. Damage or pseudo soldering Faults Solution:... -
Page 26: Power Output Problems
LENOVO I908 Mobile Phone Maintenance Manual Cause of the Problem: The capacitors of the PA and transceiver power supply sections have faulty soldering points or are short circuited with other resistors. Solution: Phase Error overruns Check the power supply circuitry of... - Page 27 LENOVO I908 Mobile Phone Maintenance Manual Check whether or not there is pseudo soldering at L2108 and L2109 of the RF output of PA; V_ramp signal control circuit of PA:If there is pseudo soldering or disconnection among R2103 (10K ohm), R2104 (18K ohm) and capacitor C2105(220pF), there will be no power output from the PA.
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Page 28: Assembly And Disassembly Of The I909
5 Assembly and Disassembly of the i909 5.1 Technical Steps for i909 Assembly Fig. 5-1 The assembly break down of the i909 As is shown in Figure 5-1: Install the camera 12 to the camera connector of main board 10, cover the camera protective cover 14 and dust-proof cover 15;... - Page 29 LENOVO I908 Mobile Phone Maintenance Manual then clip the whole antenna assembly 16 on the main board10; Attach the shielding cover conductive cloth 41 to the lower metal frame of LCD8 and then cover the back of the metal frame; attach LCD conductive back glue 9 on corresponding positions on the main board 10;...
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Page 30: I909 Parts Layout
26 on the battery cabin on the rear housing; Place the built-in battery (25) in the phone and clip the battery cover (24). 5.2 i909 Parts Layout 5.2.1 Location of main label on the Rear Housing Page 30... -
Page 31: Precautions During The Assembly Of The I909
LENOVO I908 Mobile Phone Maintenance Manual 5.3 Precautions during the Assembly of the i909 i.Make sure that the camera connector is properly connected to the connector housing of the main board when installing the camera ii.Make sure that each clip is in proper connection with the main body when installing the antenna components iii.The FPC keypad and the DOME keypad must be aligned with the 7... - Page 32 LENOVO I908 Mobile Phone Maintenance Manual vi.During the assembly of the LCD, it is important to make sure that the FPC of the LCD is inserted into the FPC connector properly; otherwise there may be display problems. Page 32...