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Lenovo I360 Maintenance Manual
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Lenovo I360 Maintenance Manual

Lenovo I360 Maintenance Manual

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I360 Mobile Phone Maintenance Manual
I360 Mobile Phone Maintenance
Lenovo Mobile Telecommunications Co., Ltd.
All information contained herein, including the text, diagrams, data,
graphics, images, methods and ideas, is the property of Lenovo Mobile
Communications Co., Ltd. and shall not be disclosed, copied,
duplicated, photographed and transferred in any way by any individual
and organization without the written approval of the Mobile
Communication Office of Lenovo Research Institute.
Lenovo Mobile Telecommunications Co., Ltd.
LENOVO
Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）
Manual
2005 All rights reserved
©
v0.1
1
1
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Summary of Contents for Lenovo I360

  • Page 1 Lenovo Mobile Telecommunications Co., Ltd. All information contained herein, including the text, diagrams, data, graphics, images, methods and ideas, is the property of Lenovo Mobile Communications Co., Ltd. and shall not be disclosed, copied, duplicated, photographed and transferred in any way by any individual and organization without the written approval of the Mobile Communication Office of Lenovo Research Institute.

  • Page 2: Table Of Contents

    I360 Mobile Phone Maintenance Manual v0.1 Contents Preface ............................3 1. Specifications ............................4 2 Working Principles............................5 2.1 GSM System Description ....................6 2.1.1 General Introduction to Cellular Theory ................6 2.1.2 GSM Description ......................6 2.1.3 Service Area ........................9 2.1.4 Baseband Block Diagram....................10 2.2 GSM Processor and Voice Baseband Codec .................. 11 2.3 GSM Processor ..........................12...
  • Page 3 I360 Mobile Phone Maintenance Manual v0.1 Preface I360 is a bar-style GSM (GPRS) WAP mobile phone developed by Lenovo Mobile Telecommunications Co., Ltd. Services for this product are divided into three levels: 1、 Level 1 is for elementary services. With no specialized maintenance tools available, only empirical maintenance service is offered.

  • Page 4: Specifications

    I360 Mobile Phone Maintenance Manual v0.1 1. Specifications Table 1. Radio Frequency Radio Frequency (900MHz) Frequency range Transmit: 880-915MHz；Reception: 925-960MHz Bandwidth per channel 200 kHz 174 channels x8 (TDMA) Number of channels Carrier modulation GMSK (Gaussian Minimum Shift Keying) Duplex bandwidth 45 MHz ±0.1 ppm...

  • Page 5: Working Principles

    I360 Mobile Phone Maintenance Manual v0.1 battery) 60--80h (When using 680mAH lithium battery) Standby time* Data sharing with PC Supported (specialized transmission cable required) * Depends on the network used. 2 Working Principles Baseband Structure Block Diagram Voice band/Baseband coder...

  • Page 6: Gsm System Description

    I360 Mobile Phone Maintenance Manual v0.1 2.1 GSM System Description 2.1.1 General Introduction to Cellular Theory A cellular system differs from other wireless telephone systems by dividing the service area into many contiguous cells, which enables more powerful call processing and higher system utilization.
  • Page 7 I360 Mobile Phone Maintenance Manual v0.1 D. Security and privacy -- While analog calls can be easily intercepted by portable wireless receivers, GSM calls are encrypted and transmitted digitally, which are of high security. E. High quality voice – Problems such as channel interference, switching interrupts and attenuation are properly handled in the digital system, and error code correction (reorganizing missed data) also helps to improve voice quality.
  • Page 8 I360 Mobile Phone Maintenance Manual v0.1 be ignored. The GSM system is more capable of enduring inter-channel interference. With digital modulation, forward correction and equalization, GSM cells are more adjacent to each other than similar analog cells. So frequency multiplexing improves the GSM system and enables more powerful calls processing for frequently used areas.

  • Page 9: Service Area

    I360 Mobile Phone Maintenance Manual v0.1 2.1.3 Service Area Calls within the service area can be positioned and received by the system administrator (for a wireless system, there are no definite geographical boundaries.) If a mobile phone is located outside of the coverage area, Out of Service will be prompted, and the phone cannot locate and receive a call.

  • Page 10: Baseband Block Diagram

    I360 Mobile Phone Maintenance Manual v0.1 2.1.4 Baseband Block Diagram Radio frequency block diagram Page LENOVO Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）...

  • Page 11: Gsm Processor And Voice Baseband Codec

    I360 Mobile Phone Maintenance Manual v0.1 2.2 GSM Processor and Voice Baseband Codec 2.2.1 Mcu chip consists of some elements, including ARM7TDMI microcontroller, which is in charge of channel coding/decoding and running protocols and applications; a 16-bit digital signal processor (DSP), which produces full speed and enhanced full speed voice and a high performance, soft decision Viterbi equalizer, which is built-in software in the DSP.

  • Page 12: Gsm Processor

    I360 Mobile Phone Maintenance Manual v0.1 sub-modules (the SIM converter, SIM voltage converter for 3V-5V logic signals).There are also some improvements in the control of recharging power increasing and of the recharging progression. 2.3 GSM Processor 2.3.1 Mcu Chip The enhanced GSM processor is a highly integrated core element in the GSM chipset.

  • Page 13: Abb Chip

    I360 Mobile Phone Maintenance Manual v0.1 b. Full-speed voice coding/decoding b. Enhanced full-speed voice coding/decoding d. 16-state Viterbi equalizer (soft decision) e. Dual-tone multiple frequency and call progression voice producer L. Wireless transmission power management M. Delayed clock for low current standby state N.

  • Page 14: Disassembly

    Power management module H. 100 Ball BGA package 3. Disassembly The disassembly of bar phone I360 is relatively complicated. To avoid internal elements and the housing damage when disassembling or assembling again, the service operations should be performed with great caution. Safe grounding should be guaranteed.

  • Page 15: Recommended Tools

    I360 Mobile Phone Maintenance Manual v0.1 Attention Most of the circuit elements of this device are prone to static damage. When operating, transporting the device or maintaining the internal elements, measures should be taken against static electricity. 3.1 Recommended tools The following tools are recommended for disassembling or assembling the mobile phone (or similar tools with the same functionality can be utilized).

  • Page 16: I360 Assembly Steps

    Notice: A brand new problem has to be solved based on the technician’s experience. The troubleshooting list given below contains the known faults of I360, which is for Level 1 service reference. 5.1.1 Chips and elements inside the mobile phone are driven by weak currents, so the maintenance should not be performed within a magnetic field or with high voltage to avoid possible damage caused by heavy current.

  • Page 17: Problem Identification And Maintenance

    Final testing or calling on trial are performed to check whether the mobile phone can operate normally again. 5.2 Problem Identification and Maintenance The I360 phone includes mainly a motherboard and a keypad board.When troubleshooting the phone, check the connection between the LCD and the keypad board. 5.2.1 Block Diagram and Modules Description 5.2.1.1 Block Diagram...
  • Page 18 I360 Mobile Phone Maintenance Manual v0.1 KEYBOARD SPEAKER MIDI& VIBRATOR EARPHONE BATTERY CAMERA JPEG RECEIVE MEMORY 5.2.1.2 Modules Description The upper part shows ABB’s direct output, and the lower part shows the output voltage Power supply: from the LDO. Once the phone is turned on, the LDO output should be valid. If there is no output, check the LDO’s input and the shutdown control (which should be “1”).
  • Page 19 I360 Mobile Phone Maintenance Manual v0.1 U335_5pin 2.8V TO LCD,JPEG,MIDI U318_4pin/ U318_6pin 2.8V/1.8V TO Camera Connector VCHG (J305_3,4pin) 5.00~5.50V Voltage from recharger to the phone U320 About 6.2V LCD Backlight Voltage(2 lights) Connectors (both internal and external) 18pin＋4pin connector, external...

  • Page 20: Baseband Troubleshooting

    I360 Mobile Phone Maintenance Manual v0.1 so there is an analog switch U300 . 5.2.2 Baseband troubleshooting The possible symptoms and corresponding solutions of I360 are listed in the table below for reference. Entry Symptoms Possible causes Solution or maintenance steps...
  • Page 21 I360 Mobile Phone Maintenance Manual v0.1 No power supplied Check the voltage of pin 25 of J300 (should be 2.8V) LCD damaged Replace the LCD. JPEG chip (U301) Check for possible pseudo soldering malfunction or damaged JPEG chip data lines...
  • Page 22 I360 Mobile Phone Maintenance Manual v0.1 Abnormal signal for SIM Check the signals that control the SIM control from the main chip card, including VDD, RST, CLK and Damaged SIM socket Replace with a new SIM socket Pseudo soldering of the SIM...
  • Page 23 I360 Mobile Phone Maintenance Manual v0.1 Unable to dial a Poor connection Check antenna antenna call antenna antenna connectors ensure good connectors connection Pseudo soldering of antenna Solder the elements again elements The signal is too weak Move the phone into an open or outdoor...

  • Page 24: Rf Troubleshooting

    I360 Mobile Phone Maintenance Manual v0.1 PIN code error The SIM card may be Contact the network service provider damaged when incorrect code is entered Unable Problem with the data cable Check the data cable and the download download or the utility program for...
  • Page 25 I360 Mobile Phone Maintenance Manual v0.1 Refer to this diagram for the working process. 5.2.3.2 EGSM/DCS Transmission Troubleshooting The transmission troubleshooting steps are illustrated in the diagram given below. Page LENOVO Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）...
  • Page 26 I360 Mobile Phone Maintenance Manual v0.1 Page LENOVO Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）...
  • Page 27 I360 Mobile Phone Maintenance Manual v0.1 5.2.3.3 EGSM/DCS Reception Troubleshooting The reception troubleshooting steps are illustrated in the diagram given below. No I/Q signals had been received upon device inspection Check Pin 10 of FE600 for possible signal absence Check antenna...

  • Page 28: Engineering Mode

    I360 Mobile Phone Maintenance Manual v0.1 6. Engineering Mode To find or set up some special functions, please operate with the following control symbols. The engineering mode is for test engineers to test RF or baseband and other basic performances on the mobile phone.Besides RF Test and Baseband Test, the engineering mode offers testing on some other data, such as the IMEI code and the product serial number.
  • Page 29 I360 Mobile Phone Maintenance Manual v0.1 information (such as location and channel), carrier, signal strength, and time slice, etc. Baseband (the main testing points): LCD, keypad, ring tones, vibration, and so on. Others: For reading/writing the IMEI code as well as the product serial number.
  • Page 30 I360 Mobile Phone Maintenance Manual v0.1 *#06# IMEI code ####0000# Hardware/software version number ####1040# To display network information BCH BRXL C1 C2 INFO INFO BCH: BRXL: BSIC: DSC: TXLEV: RLT: TAV: CBA: CBQ: INFO INFO BCH: BRXL: BSIC: LAC: CELID:...
  • Page 31 I360 Mobile Phone Maintenance Manual v0.1 INFO INFO BCH: BRXL: BSIC: LAC: CELID: TALIG: CBA: CBQ: FFSET: INFO INFO BCH: BRXL: BSIC: LAC: CELID: TALIG: CBA: CBQ: FFSET: INFO INFO BCH: BRXL: BSIC: LAC: CELID: TALIG: CBA: CBQ: FFSET: Page LENOVO Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）...
  • Page 32 I360 Mobile Phone Maintenance Manual v0.1 INFO INFO BCH: BRXL: BSIC: LAC: CELID: TALIG: CBA: CBQ: FFSET: INFO INFO BCH: BRXL: BSIC: LAC: CELID: TALIG: CBA: CBQ: FFSET: Figure 5. Network information interfaces For all the interfaces, press Up/Down to display the next page. When the last page is displayed, press Down to return to the first page.
  • Page 33 I360 Mobile Phone Maintenance Manual v0.1 Press <NEXT> to show the blank screen. Press <NEXT> to test the ring tones. To play some MIDI music. Press <NEXT> to test the vibrator. The vibrator is started. Press <NEXT> to test the keypad.
  • Page 34 I360 Mobile Phone Maintenance Manual v0.1 Left functional key ------ Right functional key ------ POWER ------- Answer ------- ------ ------- Down ------- Left ------- Right ------- Press the keys one by one as described to clear the characters on the screen.
  • Page 35 I360 Mobile Phone Maintenance Manual v0.1 b. Fill in the form in detail and give necessary explanation. Maintenance Manual Doc. No. Proofread: Name: Address: Phone Number: Problem or information missed: (Please refer to the section and give the page number or figure number)

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