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BenQ March Service Manual

BenQ March Service Manual

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BenQ
Rev 1.0
BenQ March (D72)/Amethyst
LT Mobile Phone
Service Manual
BenQ Inc.
Wireless Business Unit
Customer Service Dep.
Tel : +886-(0)2-2799-8800 ext 6687
E-Mail : Roychen@acercm.com.tw
1

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  • Page 1 BenQ Rev 1.0 BenQ March (D72)/Amethyst LT Mobile Phone Service Manual BenQ Inc. Wireless Business Unit Customer Service Dep. Tel : +886-(0)2-2799-8800 ext 6687 E-Mail : Roychen@acercm.com.tw...

  • Page 2: Table Of Contents

    BenQ Rev 1.0 Contents l Preface… … … … … … … … … … … … … … … … … … … ..… … … … … 1 l Theory of Operation 1.GSM system Description… … … … … … … … … … … … … … … … 7 2.Baseband function description…...

  • Page 3: Preface

    Preface This service manual is for the customers who purchase of Acer March handset . It has several main parts of our handset that include hardware/software and simple disassembly/assembly procedure introduction. If you don’ t understand some of these sections or any query about it please kindly use our service manual feedback form and send it back to our Customer Service Department and we’...
  • Page 4 BenQ Rev 1.0 Table 2: Voltage Operation Voltage Operation Li-ion Battery DC 3.3-4.2 V Ni-MH Battery DC 3.3-4.2 V Table 3: Power Consumption Power Consumption Working Current Average < 270 mAH Standby Current 6 +/-0.2 mAH Talking Time* 120 ~300 min (With Ni-MH 550...
  • Page 5 BenQ Rev 1.0 Scope of Manual This manual is intended for use by experienced technicians familiar with similar types of equipment. It is intended primarily to support electrical and mechanical repairs. Repairs not covered in the scope of this manual should be forwarded to Motorola’ s regional...

  • Page 6: Theory Of Operation

    BenQ Rev 1.0 Theory of Operation △ GSM System Description General Cellular Concept The cellular systems are used to provide radiotelephone service in the frequency range 890-960 MHz. A cellular system provides higher call handling capacity and system availability than would be possible...
  • Page 7 BenQ Rev 1.0 country which supports a GSM system. ♦Digital Air Interface - The GSM phone will provide an entirely digital link between the telephone and the base station, which is, in tur n, digitally linked into the switching subsystems and on into the PSTN.
  • Page 8 BenQ Rev 1.0 CELL B CELL E CHANNELS CHANNELS 9-16 9-16 CELL A CELL D CHANNELS CHANNELS CELL C CELL F CHANNELS CHANNELS 17-24 17-24 Figure 2: Hypothetical The radiotelephones themselves are capable of operation on any channel in the system, allowing them to operate in any cell. Due to the...
  • Page 9 BenQ Rev 1.0 physically closer, than similar cells in analogue systems. Therefore the advantage of frequency re-use can be further enhanced in a GSM system, allowing greater traffic handling in high use areas. By incorporating Time Division Multiple Access (TDMA) several calls can share the same carrier.
  • Page 10 BenQ Rev 1.0 distance from the base station. As the radiotelephone moves from cell to cell, its control is handed from one base station to another in the new cell. This change is handled by the radiotele-phone and base stations, and is completely transparent to the user.

  • Page 11: Baseband Function Description

    BenQ Rev 1.0 △ Baseband function Descriptions 1. Introduction: March(T191) utilizes TI’ s chipsets (Ulysse and Nausica) as base-band solution. Base-band is composed with two potions: Logic and Analog/Codec. Ulysse is a GSM digital base-band logic solution included microprocessor, DSP, and peripherals. Nausica is...
  • Page 12 BenQ Rev 1.0 2.2 Nausica (Omega) DUAL BAND AMETHYST TXIP FROM VCC1 TXIN TO U61 VCC2 TXQP BATBB BACKUP VCC3 TXQN VBACKUP RXIP RXIN FROM U61 RXQP VR1B COIN LI-ION VR1B RXQN BATTERY 2.0V@50mA TO U85 VR2B IBIC VR2B 2.9V@50mA...
  • Page 13 BenQ Rev 1.0 3.1.4 MODEM-UART 3.1.5 I2C master serial interface (I2C) In 56D66, we employ I2C bus to control LCD module. I2C_SCL: programmed to the fast transmission mode (400KHz) I2C_SDA: the serial bi-directional data of the LCM controller 3.1.6 General Purposes I/O (GPIO) Ulysse provides 16 GPIOs configurable in read or write mode by internal registers.
  • Page 14 BenQ Rev 1.0 capability). It includes a complete set of base-band functions to perform the interface and processing of voice signals, base-band in-phase (I) and quadrature (Q) signals which support single-slot and multi-slot mode, associated auxiliary RF control features, supply voltage regulation, battery charging control and switch ON/OFF system analysis.
  • Page 15 BenQ Rev 1.0 (4) LDO R2 generates the supply voltages 2.9V for Ulysse memory interfaces I/O’ s. It has a backup through BBS system. (5) LDO R3 generates the supply voltage 2.9V for the analog functions of OMEGA. The backup battery switch (BBS) generates at its output an...
  • Page 16 BenQ Rev 1.0 VCC1: to provide power for DC/DC and regulator R1 (VR1) VCC2: to provide power for regulator R1B (VR1B), R2B (VR2B) and charger pump VCC3: to provide power for regulator R3 (VR3) VR2IN: to provide power for regulator R2 (VR2) NAUSICA provides five low drop-out voltage regulators.
  • Page 17 BenQ Rev 1.0 3.4 System power on/off Sequence 3.4.1 Power on There are three conditions that system can power on. -On button pushed: A falling edge is detected on PWON pin and the debouncing time is greater than 30ms. -Set Alarm: A rising edge is detected on RTC_ALARM (RTCINT) -Charger plugged: VCHG >...
  • Page 18 BenQ Rev 1.0 3.5 Memory circuit VCCQ ADDRESS BUS ULYSSE DATA BUS FLASH NROMCS1 NFOE NRAMCS NBHE NBLE SRAM Description Flash (U5) is a 32Mbit device, supported by VR2 and booted from top. The total 32Mbits are divided into two sections: 24Mbits is used for software program code and 8Mbits is used for EEPROM data.
  • Page 19 BenQ Rev 1.0 3.6 Display circuit 2.9V 7.6V VDD1 R27 1K VDD2,3 NRSTOUT /RES I2C_SDA I2C_SCL 400KHz VLCD 1UF(0603) 39PF 39PF C(0603) 1UF(0805 Z5U 16V) From U1/Ulysse BGND Description Display circuit is composed of a 98*64 resolution LCD module and a display supply voltage bypass capacitor C34.
  • Page 20 BenQ Rev 1.0 3.7 Vibrator circuit 3.6V VBAT DAN222 1.2V LA4-432 94mA IO0VIBRATOR UMT4401 From U1/Ulysse BGND Description To enable vibration, Ulysse sets IO0VIBRATOR to ‘H’ to activate the motor. R46 and R49 are used to make BQ4 working in saturation area.
  • Page 21 BenQ Rev 1.0 3.8 Buzzer circuit 3.6V VBAT DAN222 1.3V BUZZER From U1/Ulysse BGND BGND (PWT) (Not In Use) 78mA BUZZOP UMT4401 DAN222(N.M.) BGND Description To alert the buzzer, Ulysse applies PWT (Pulse Width Tone) signal at BU to drive the buzzer.
  • Page 22 BenQ Rev 1.0 3.9 LED circuit 3.6V VBATBB 3.35V UMT4403 UMH10N(SOT363) 37mA 60mA (PWL) 39 (0805) 24 (0805) BGND From U1/Ulysse 1.9V 22-21 22-21 22-21 19-21 19-21 19-21 19-21 19-21 19-21 19-21 19-21 BGND BGND Description 56D66 employs three LEDs for LCD module backlight and eight LEDs for keypad backlight.
  • Page 23 BenQ Rev 1.0 3.10 Audio circuit Uplink: 2.5V MICBIAS 4.3K From U3/Omega 4.7UF(0805) 0.1UF BGND 4.3K 1UF(0603) To U3/Omega MICIP To U3/Omega MICIN Microphone 1UF(0603) EMIF01-10005W5 BGND 47PF 47PF BGND Downlink: BL2 0 From U3/Omega EARP From U3/Omega EARN 100PF EMIF01-10005W5 (N.M.)
  • Page 24 BenQ Rev 1.0 3.11 Charging circuit CHARGERIN 6.2K Charger Over-voltage Protection Circuit FUSE(1A 0603) 0.1UF Power Jack BGND Main Charging Route R68 0 470K (1%) 470K VBAT 0.1UF 0.2(1%) 0805 BGND TBAT CRS03 43K (1%) 100K BATTERY CONN FDG6303N 1000PF...
  • Page 25 BenQ Rev 1.0 F1 is a 1A fuse to assure charging current under limit. The normal charging operation theory is that Omega monitors charger voltage via VCHG pin to decide whether charger plug in or out, and control power P-MOSFET (U17) via ICTL pin.
  • Page 26 BenQ Rev 1.0 3.12 Earphone jack circuit TP33 2.9V 100K VR2B_SW TXD0 IO13ACCIN Plug-In BEAD(0603) B G N D B G N D AUXOP NC7SB3157 For Data Cable IO3DATA_HP_SEL L: Download H: Earpiece For Hands-Free active B G N D...
  • Page 27 BenQ Rev 1.0 3.13 Rader circuit SVDD VCC/VPP ULYSSE OMEGA SOCKET SIM_IO SIO3 SIO5 SIM_CLK SCLK3 SCLK5 SIM_RST SRST3 SRST5 Description The SIM follows the GSM and ISO specifications and works in 3 volts or in 5 volts with a minimum external logic.
  • Page 28 BenQ Rev 1.0 3.14 Keyboard circuit ROW0 ROW1 ROW2 ROW3 COL0 [Down] COL1 [SEL] COL2 [Up] COL3 ROW4 RB520S-30 [menu] PWON [NO] To U3/Omega BGND [PWR] COL4 [Send] [QUIT] Description 1. The keypad is made of a 5 Column x 4 Row matrixes.
  • Page 29 BenQ Rev 1.0 56D72 Side 1 Layout...
  • Page 30 BenQ Rev 1.0 56D72 Side 2 Layout...
  • Page 31 BenQ Rev 1.0 56D72 ULYSSE VR2B X1 CRYSTAL 32.768KHz 13MHZ CLKTCXO TSPDO TCXOEN ULYSSE TSPCLKX...
  • Page 32 BenQ Rev 1.0 56D72 OMEGA TBAT ADIN1 ONNOFF IO1BATID_DET RESPWRONZ RPWON CK13M PWON OMEGA 13MOUT EARPHONIN...
  • Page 33 BenQ Rev 1.0 56D72 Power Supply Circuit 3.2V On Side 2 3.0V/5.0V SVDD 2.9V VBACKUP On Side 2 2.9V 2.9V U3 Omega 1.8V VAUX 1.8V Ulysse VR1B VR2B VBATBB 2.9V 2.0V 2.9V 1.8V 2.9V 5.8V SOCKET Flash & SRAM U5,U6...
  • Page 34 BenQ Rev 1.0 56D72 Memory Circuit NROMCS1 U1.P6 IO5FLASH_WP# U1.J12 NFOE U1.L8 NRAMCS U1.P7 2.9V NBHE U1.K7 U1.M9 NBLE U1.K8 DATA DATA DATA DATA 2.9V DATA DATA FLASH SRAM 2.9V U1.N8...
  • Page 35 BenQ Rev 1.0 56D72 Audio Driver 2.5V MICBIAS U3.K9 Microphone MICP U3.K8 MICN U3.J8 EARN U3.H8 Receiver EARP U3.H9...
  • Page 36 BenQ Rev 1.0 56D72 Earphone Jack L: plug-in H: idle U1.A7 IO13ACCIN R 3 2 2.9V V R 3 U3.H10 R 7 6 2.9V VR2B U3.D1 R 3 3 IO3DATA_HP_SEL U1.M6 L: Data Cable H: Earphone R 3 6 A U X O P U3.J9...
  • Page 37 BenQ Rev 1.0 56D72 Charging Circuit On Side 1 U3 Omega VBAT V C H G I C T L V R 3 VBATBB R64 R70 Charger In...
  • Page 38 BenQ Rev 1.0 56D72 Vibrator & Buzzer VBAT VBAT On Side 2 On Side 2 U1.C2 IOVIBRATOR U1.J3...
  • Page 39 BenQ Rev 1.0 56D72 SIM Circuit 3V/5V SRST5 U3.D5 1.6/3.2MHz SIO5 U3.D4 I / O SCLK5 1.6/3.2MHz U3.B4 SVDD U3.A2...
  • Page 40 BenQ Rev 1.0 56D72 Keypad and LEDs...
  • Page 41 BenQ Rev 1.0 56D72 LCD Circuit 400KHz I2C_SCL RN3.2 / U1.F4 I2C_SDA 7.6V RN3.1 / U1.C4 2.9V NRSTOUT 2.9V U1.K11...

  • Page 42: Radio Frequency Function Description

    BenQ Rev 1.0 △ Radio Frequency function Descriptions (Top Side)
  • Page 43 BenQ Rev 1.0 Bottom Side...
  • Page 44 BenQ Rev 1.0...
  • Page 45 BenQ Rev 1.0...
  • Page 46 BenQ Rev 1.0...
  • Page 47 BenQ Rev 1.0...
  • Page 48 BenQ Rev 1.0 RF circuit element placement C704...
  • Page 49 BenQ Rev 1.0 EGSM 900 Receive Signal Path Diagram ： Legend Phone setting chip inductor +:continuous RX mode ARFCN:62 chip capacitor BB PGC Gain value:3 CW Wave IF PGC Gain value:60 CH 62 947.46MHz chip resistor LNA turned off:n -50dBm...
  • Page 50 BenQ Rev 1.0 DCS 1800 Receive Signal Path Diagram ： Legend Phone setting chip inductor +:continuous RX ： modeARFCN CW Wave chip capacitor ： BB PGC Gain value CH 700 IF PGC Gain value ： 1842.86MHz ： chip resisto r...
  • Page 51 BenQ Rev 1.0 DCS 1800 Transmit Signal Path Diagram ： Legend Phone setting RF toolkit mode chip inductor CH 700 : ARFCN Power Supply Setting : 3.8V Spectrum Analyzer Trace : Max Hold Mode chip capacitor CH 700 800 : scaling factor 1747.8MHz...
  • Page 52 BenQ Rev 1.0 EGSM 900 Transmit Signal Path Diagram ： Legend Phone setting RF toolkit mode chip inductor CH 62 : ARFCN Power Supply Setting : 3.8V Spectrum Analyzer Trace : Max Hold Mode chip capacitor 800 : scaling factor...
  • Page 53 BenQ Rev 1.0 1.T/R switch: U75 is a front-end switch device for GSM/DCS. These devices include 1 diplexer + 2 switches + 2 LPFs. The below table shows the three operating mode. Mode Vc1 (pin 2) Vc2 (pin 11) GSM TX...
  • Page 54 BenQ Rev 1.0 baseband filtering is distributed in the PGA and comprises a single R/C low-pass section and 2 second order Butterworth filters. The majority of the baseband filtering is implemented on-chip. Each 3 stage PGA is DC coupled and has a gain range. The base-band PGA has 2dB gain steps and 90dB control range.
  • Page 55 BenQ Rev 1.0 U63 is a RF VCO module. The frequency band is 3610∼3840 MHz for GSM / DCS TX / RX. The output frequency can be controlled by U61 pin 43,44. C>.IF VCO IF VCO consists of U61 pin 32 、 33, D601、 D602(varactor) and other RLCs.
  • Page 56 BenQ Rev 1.0 frequently b) Defective or 1. Check for appropriate dropping, misplaced frequencies and power weak and/or telephone Main level gains/losses in the Rx distorted Board. path. audio, etc.). 2. Replace malfunctioning components if listed in parts list. Likely fail components are：U75,...

  • Page 57: Download

    BenQ Rev 1.0 c) Main Board 1. Replace Main Board assembly Assembly. defective. 2. If Main Board Assembly is at fault, examine for improper solder and connections. Download Introduction: This document describes all the functions in service DMtool. △ System requirements and setup: A.
  • Page 58 BenQ Rev 1.0 In Windows 95/98/NT/2000, extract the Dmtool compress files to any temporary directory. It will create DISK1 this subdirectory. Please go into the DISK1 and double click the setup.exe. The Install shield will auto setup the Dmtool in your operating system.

  • Page 59: Function Descriptions

    BenQ Rev 1.0 △ Function descriptions: There are several windows (views) in the DMtool application. Each view performs a special function. A. Download: Before you start a RS232 download, you must select a flash-load program file by pressing down the “Flash File” button or “Set Flash File”...
  • Page 60 BenQ Rev 1.0 and block 1 program codes . It is writing critical boot codes at this time. If you terminate the download process at this moment, this handset not only can’ t power on but also can’ t re-download again.
  • Page 61 BenQ Rev 1.0 (5).Select the feature you want enable/disable by click check button in option tree-item. (6).Click “Write Flex Option” to write flex option to handset. D. Calibration: (1).calibration connect cable: GPIB Rs232 GPIB GPIB Acer Calibration Power downloader Instrument...
  • Page 62 BenQ Rev 1.0 2-2.Auto-Power-Control: If the flag is TRUE and the power supply is a supported type (please refer to System Requirement) , the calibration will start automatically, or you must operate it manually. 2-3.Set Ramping Default: Some measurement instruments do not support ramping calibration, you can set the ramping table by default values.
  • Page 63 BenQ Rev 1.0 Before Click the “Auto-Calibration” button, make sure all listed items are done: (1) Set the correct com port and baudrat in option menu (2) Choose Auto-calibration configure file. When you set up the program success, we had assigned the default configure file.
  • Page 64 BenQ Rev 1.0 (2) If the DmTool receive the signal from target handset , then it will start to identify calibration device, and show up Identify Calibration device… message. If the calibration device identified ok, then it will start the calibration.

  • Page 65: Faq

    BenQ Rev 1.0 APC+ARC AGC+AFC+APC AGC+AFC+APC+ARC AGC+AFC+APC+ARC+ADC (2). DCS band : AGC, ADC, and APC can be calibrated separately. APC+ARC AGC+APC AGC+APC+ARC AGC+APC+ARC+ADC If your calibration instrument can’ t support ramping calibration, we support Set Ramping default to set the ramping table to optimal default value.
  • Page 66 BenQ Rev 1.0 as different MS models. For March model, it uses r_flash_xxx.mot. When the new vendor flash used in handset, the boot code r_flash_xxx.mot need upgrade to new version which support new vendor flash. Users just need to click the “Boot File” button in Download window or click the “Set Boot Code File”...

  • Page 67: Disassembly (Level1~Level2)

    BenQ Rev 1.0 Disassembly Introduction Responsible care should be taken during the disassembly and reassembly of the units in order to avoid damaging or stressing the housing and internal components. Ensure that a properly grounded high impedance conductive wrist strap is used while performing these procedures on electronic units.
  • Page 68 BenQ Rev 1.0 Disassembly Procedure The following information describes the procedure for removing and accessing various parts of the phone. Front Case Removal 1. Turn off the telephone. 2. Slide down the bottom cover, and remove the battery pack from the Rear housing.
  • Page 69 BenQ Rev 1.0 5. Unclip the 2 snap fits from the left and right hand sides of the unit and separate the rear from the front housing Main Board Removal 1. Carefully separate the main board from the front housing by lifting it upwards.
  • Page 70 BenQ Rev 1.0 4. Place the main board facing upwards on an anti-static mat. 5. Place a protection tape over the LCD module. NOTE Do not touch the LCD module with your hands! 6. Remove the Keypad from the front housing by lifting it upwards.

  • Page 71: Troubleshooting

    BenQ Rev 1.0 reverse of that previously completed for disassembly. Troubleshooting △ Level 1 ~level 2 repair Symptom Probable Cause Verification and Remedy 1.Unit a).Battery either 1. Measure battery voltage. If the battery doesn’ t turn discharged or voltage is <3.2V, recharge the battery defective.

  • Page 72: Level 3~Level 4 Repair

    BenQ Rev 1.0 8.Can’ t Battery or charger is 1. Use the correct battery and charger to charge at fault check the charge function. 2.If charging function is ok, the battery or charger is illegal. △ Level 3~ level 4 repair...
  • Page 73 BenQ Rev 1.0 d) X1, R56, C1 or 1. Use the power supply to supply the VBAT voltage. Then, press the power-on key. Visually inspect the current of the handset used. 2. Measure the waveform of the R56. 3. If the waveform isn’ t the 32KHz clock, replace the C3 and R2.
  • Page 74 BenQ Rev 1.0 c) U1 is at fault 1. Power on the handset. Then measure the waveforms of the J2.6, J2.4 and J2.5 pins. 2. If the J2.6 pin is always low or the other two pins (J2.4 and J2.5) are no data, the U1 is at fault.
  • Page 75 BenQ Rev 1.0 c) Other 1. Measure the waveform of the BQ3.3, components are at BQ3.2, and BQ3.1 when Buzzer fault. function is executed. 2. If any pin is no signal, replace the component relative to that pin. 6.Vibrator no a) Components shift 1.
  • Page 76 BenQ Rev 1.0 8.Micphone a) Components shift 1. Disassembly to visually inspect the X2. no function If the cover of the X2 is not matched with the micphone hole or micphone doesn’ t contact well with PCB pads, replace the cover of the X2 or micphone.
  • Page 77 BenQ Rev 1.0 b) U3 is at fault 1. Measure voltage level if VR3 and VR2B_SW voltage level are equal 2.9V. 2. Measure the waveforms of the BL1, R41, and J4. If the BL1 or R41 pins don’ t output any signal when handfree function is executed, U3 is at fault.
  • Page 78 BenQ Rev 1.0 10.Datacable a) Components shift 1. Disassembly to visually inspect the J3. no function If audio jack (J3) pins don’ t contact well with PCB pads, solder the pins and pads together. 2. Visually inspect the R72, R32, U9, U8, U10, R36, BL1, R41, C38, R38, R37, C37 and J4.
  • Page 79 BenQ Rev 1.0 c) U1 is at fault 1. Measure the waveforms of U8.3 and U10.3 when datacable function is executed. 2. If any pin is no signal, maybe U1 is at fault then replace the U1. 12. Can’ t a) Components shift 1.
  • Page 80 BenQ Rev 1.0 c) U3 or U1 is at 1. If check the b steps and the TPSIM1, fault TPSIM2, TPSIM3 or TPSIM4 is still no signal, maybe the U3 or U1 is at fault. 2. Replace the U3 then re-check the step 3.
  • Page 81 BenQ Rev 1.0 c) Peripheral 1. Use dummy battery to check the components for charging function. JP1.4 connected to charging are at fault. V+ (3.6V) of the power supply. JP1.1 connected to V- (GND) of the power supply. JP1.3 connected to a resistor (10K ohm) to ground.
  • Page 82 BenQ Rev 1.0 d) U3 is at fault 1. When the charger is plugged in, the voltage of the VCHG pin is 4~6V. And when charging, the ICTL pin will high/low to control charging pulse. 2. If not, maybe U3 is at fault. Replace the...
  • Page 83 BenQ Rev 1.0 e) C3 or R2 is at 4. Measure the waveform of the R2. fault. 5. If the waveform isn’ t the 13MHz clock, replace the X1, R56, C1 or C2. 6. If they are not at fault, proceed to f.
  • Page 84 BenQ Rev 1.0 b) U1 is at fault 3. Measure the waveform of the U7.2. If the U7.2 doesn’ t output any signal when LED function is executed, U1 is at fault. 4. If it is not at fault, proceed to c.
  • Page 85 BenQ Rev 1.0 b) U1 is at fault 3. Measure the waveform of the R46. If the R46 pin doesn’ t output any signal when Vibrator function is executed, U1 is at fault. 4. If it is not at fault, proceed to c.
  • Page 86 BenQ Rev 1.0 b) U3 is at fault 3. Measure the waveforms of the R50, R51, and R43. If the R50 or R51 pins don’ t output any signal or Micbias voltage level is not equal 2~2.5V when micphone function is executed, U3 is at fault.
  • Page 87 BenQ Rev 1.0 c) Other 5. When handfree is plugged in, components are at IO13ACCIN detect 0V. Then, fault. IO3DATA_HP_SEL outputs high level, U8.1 pin connects to U8.4 pin and U10.1 pin connects to U10.4 pin. If not, maybe the U8 and U10 are at fault.
  • Page 88 BenQ Rev 1.0 b) Components are 7. Measure voltage level if VR3 and at fault. VR2B_SW voltage level are equal 2.9V. 8. When datacable is plugged in, IO13ACCIN detect 0V. Then, IO3DATA_HP_SEL outputs high level about 1 ~ 2 sec, and switches to low level.
  • Page 89 BenQ Rev 1.0 12. Can’ t a) Components shift 4. Visually inspect the U2. If the pins of the find SIM SIM socket is at fault, Disassembly to replace the U2. 5. Disassembly to visually inspect the R8, R7, C5, C8, R4, C4 and R13. If any component isn’...
  • Page 90 BenQ Rev 1.0 13. Can’ t a) Battery or charger 10. Use the correct battery and charger to charge is at fault check the charge function. 11. If charging function is ok, the battery or charger is illegal. 12. If it still can’ t charge, proceed to b b) Components shift 13.
  • Page 91 BenQ Rev 1.0 c) Peripheral 9. Use dummy battery to check the components for charging function. JP1.4 connected to charging are at fault. V+ (3.6V) of the power supply. JP1.1 connected to V- (GND) of the power supply. JP1.3 connected to a resistor (10K ohm) to ground.
  • Page 92 BenQ Rev 1.0 d) U3 is at fault 3. When the charger is plugged in, the voltage of the VCHG pin is 4~6V. And when charging, the ICTL pin will high/low to control charging pulse. 4. If not, maybe U3 is at fault. Replace the...

  • Page 93: Replacement Parts

    BenQ Rev 1.0 Replacement Parts △ Exploded View Fig 1. Mechanical Exploded View (I)
  • Page 94 BenQ Rev 1.0 Fig 2. Mechanical Exploded View (II)
  • Page 95 BenQ Rev 1.0 Fig 3. Mechanical Exploded View (III)

  • Page 96: Spare Parts List

    Keypad 55.G2201.001 Assy PCB 23.60019.021 Buzzer 23.46003.011 Vibrator 25.90020.002 Antenna 60.G2202.001 Assy Case Lower 86.00T03.2P1 Screw March 3.5L 60.G2203.011 Assy Battery Pack 56.07G17.031 LCD Module 42.G1703.001 Assy Holder LCD 34.G1701.002 Membrane Dial Pad 21.N0015.001 Lithium backup battery 47.G1703.001 Cap MIC 23.42021.001...

  • Page 97: Service Manual Feedback Form

    Service Manual Feedback Form To feedback any problem or omission to this manual 1. Highlight/Photocopy the page. 2. Fill in the information below. 3. Fax/Email this form to Customer Service Dep. of BenQ Inc. (FAX: +886-(0)2-26566396; E-Mail: PT_CS@api.com.tw) Service Manual Type: Version: Requestor’...

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