Service Manual

ManualsBrandsKodak ManualsCell PhonesSmartphone

Table Of Contents

Service Manual

Contents

1 .Objective ..............................................................................................................1

2 .Scope ....................................................................................................................1

3. Definition for terms ..............................................................................................1

4.Responsibility ........................................................................................................1

5.Detail procedure ...................................................................................................1

5.1.SC9863 system diagram ...............................................................................2

5.2. Vibration issue:..............................................................................................2

5.3. side key function abnormity..........................................................................3

5.4. Microphone function abnormity ...................................................................4

5.5. Headset function abnormity .........................................................................4

5.6. Receiver function abnormity.........................................................................5

5.7. Speaker function abnormity .........................................................................5

5.8. SIM card theory and repair...........................................................................6

5.9. LCD display abnormity .................................................................................7

5.10.Camera function abnomity .........................................................................8

5.11. T card function abnormity .........................................................................8

5.12. Charging function abnormity .....................................................................9

5.13. Camera flash.............................................................................9

5.14. OTG abnormity ...........................................................................................10

1 .Objective

This document outlines the service manual for L5711AC

2. Scope

1.Use for radio analyzing in factory.

2.Use for radio analyzing in customer service.

5.1.SC9863 system diagram.

5.2.system.diagram

Summary of content (13 pages)

PAGE 1
Service Manual Contents 1 .Objective ..............................................................................................................1 2 .Scope ....................................................................................................................1 3. Definition for terms ..............................................................................................1 4.Responsibility ...................................................................................................
PAGE 2
5.2. Vibration issue. The vibrator circuit is simple, one point connected toVIBR and the other to GND. VIBR voltage is approximately equal to battery voltage, and VIBR voltage outputs from the core chip and is controlled by the software. When vibration enabled, the differential voltage of the vibrator is close to 3.0 v, when vibration disabled, the differential voltage is close to 0 v. Repair steps: 1. Check whether the Vibrator is damaged and the soldering is well or not; 2.
PAGE 3
pressed, the input line will be down, so that by reading the state of input lines that check whether keys be pressed. Repair steps: 1. Check if keypad and DOME are damaged, the assembly OK ,and foreign matter exist, etc; 2. heck if the surrounding components(mainly varistors) on the main board are damaged and have soldering issues, etc; 3. Replace with new keypad or side key, and verify agai 4. you still have not found the problem, then check whether the U0200 and U2100. 5.
PAGE 4
1: Check if the microphone and lead is well ,and soldering is well ; 2: Check whether the relevant components have soldering problems or not; 3: Replace with new microphone, and verify again; 4: Enter the call state (or engineering test mode),measuring if microphone’s bias voltage is normal: the voltage is when the microphone works about 2.8V, and 0V when off; 5: If you still have not found the problem, then check whether the U0200 chip has soldering or performance problems or not. 5.5.
PAGE 5
1. Check if the receiver shrapnel’s elasticity is well, and contact with PCB well; 2. Check whether the relevant components have soldering problems or not; 3. Replace with new receiver, and verify again; 4. If you still have not found the problem, then check whether the U0200 chip has soldering or performance problems or not. 5.7 Speaker function abnormity Repair steps: 1. Check if the speaker and the lead are well, and soldering is well; 2. Check if the relevant components have soldering problems; 3.
PAGE 6
1. Check if the dual- cards’ insertion direction is OK; 2. Check if the card connector metal contact points have problems, such as existing foreign matters or are rusting, etc; 3. Check if the SIM card connectors and components around have soldering problems; 4. If failed to find out problems, check whether U2100 chips have soldering or performance issues. 5.9.
PAGE 7
Repair steps: 1. Check if the LCD is damaged, and J1 has soldering problems; 2. Check if t h e relevant components h ave soldering problems; 3. Replace with new LCD, and verify again; 4. If still failed to find out problems, check whether U2100 U4100 chip has soldering or performance problems. 5.10. Camera function abnormity L5711AC configured with a 8 million pixels main and Front Sub camera. the data and control lines which connect to the main chip’s camera interface irectly .
PAGE 8
PAGE 9
Repair steps: 1. Check if the camera has quality problem, and Camera has assembly problem; 2. Check if the camera’s power supply voltage AVDD DVDD is normal , and components around J5100 J5101 have soldering problems; 3. Replace with new camera, and verify again. 4. If still failed to find out problems, check whether U2100 chip has soldering or performance problems. 5.11.
PAGE 10
Repair steps: 1. Check if the USB socket J6601 pins rust or have soldering problems; 2. Check if the battery connector’s metal contact well or not, such as existing foreign matters, rusting or soldering badly, etc; 3. Check if the relevant components of the charging circuits have soldering problems; 4. Replace with U6104, and verify again; 5. If still failed to find out problems, check whether U0200 chip hassoldering or performance problems。 5.13. Camera flash.
PAGE 11
1. Check if the relevant components have soldering problems; 2. Check if the FINGERPRINT is damaged, and D5101 has soldering problems; 4. Replace with D5101, and verify again; 5.
PAGE 12
1. Enter the otg state ,measuring if output about 5V. VCHG voltage is normal: the voltage is when the otg 2. Check if t h e relevant components h ave soldering problems; After the OTG is inserted, the USB_ID PIN becomes normal when 1.8V becomes 0V. 3.
PAGE 13
FCC Statement 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.