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- Page 1 華 碩 電 腦 華 碩 電 腦 ■ Service Manual ASUS M930 Level 3 4 Trouble shooting Guide Ver 1.0 ASUS Proprietary...
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Page 2: Table Of Contents
4.8.3 On-Board Microphone can’t record ..........20 4.8.4 Receiver ..................... 20 4.9 K .................... 21 EYPAD 4.9.1 Board level test:................. 21 4.9.2 External Keypad ................21 4.9.3 Internal Qwerty Keypad ..............22 4.10 BT T ....................22 4.11 W ....................23 ASUS Proprietary... - Page 3 10.4 EGG RX....................45 10.5 GSM/GPRS/EDGE R ..........46 EPAIR ROCEDURE 10.6 WCDMA T & R ........... 47 EPAIR ROCEDURE 10.7 WCDMA TX ..................48 10.8 WCDMA RX ..................53 10.9 WCDMA T & R ........... 54 EPAIR ROCEDURE APPENDIX......................55 ASUS Proprietary...
- Page 4 電 腦 華 碩 電 腦 ■ Service Manual A ....................55 PPENDIX B..................... 55 PPENDIX C..................... 56 PPENDIX 1. Introduction.................... 56 2. Set Slot ID....................56 3. Switch to TP Mode.................. 58 4. Operating Method .................. 61 ASUS Proprietary...
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Page 5: Over View
The purpose of the troubleshooting guide just implement for the failure on the MMI Testing. We will show several cases to discuss the repair reference procedure. 1. Over view 1.1 System block diagram System block diagram System block diagram System block diagram Figure 1. System Block Diagram ASUS Proprietary... -
Page 6: Power Domain Block
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 1.2 Power Domain Power Domain Power Domain Block Power Domain Block Block Block Figure 2. Power Block Diagram ASUS Proprietary... -
Page 7: Placement Top View
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 1.3 Placement TOP View 1.3 Placement TOP View 1.3 Placement TOP View 1.3 Placement TOP View ASUS Proprietary... -
Page 8: Placement Bottom View
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 1.4 Placem 1.4 Placement Bottom View 1.4 Placem 1.4 Placem ent Bottom View ent Bottom View ent Bottom View ASUS Proprietary... -
Page 9: Specification
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 1.5 Specification 1.5 Specification 1.5 Specification 1.5 Specification ASUS Proprietary... -
Page 10: System Can't Boot
The main of the reason always focus on the component short and incorrect Power-on Sequence. In personal opinion, the power consumption of M930 can be check before the Power on Sequence. Please check the Power consumption of the M930 via power supply in R&D comment. It always judges SMT component defective issue: short, open. -
Page 11: Others
Please avoid the short issue. 3. If still can’t not improve the status, you should check the CPU and Memory status by X-ray machine. We can try to replace the CPU and memory which has updated the firmware with m930w reference version. ASUS Proprietary... - Page 12 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Figure 4. PMU-01 Figure 5. PMU-02 ASUS Proprietary...
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Page 13: Mmi Test Item
4 4 4 4 .2 .2 .2 .2 SIM Test SIM Test SIM Test SIM Test If SIM test fail, please check below items. A. SIM_VCC 2.85V If not please check the open or short on U39. B. Please check the connector 27 on touch issue. ASUS Proprietary... -
Page 14: Display Test
D. If the secondary screen backlight wasn’t executed, we can check below items on the LCD_PCB auxiliary board. LED_V+ 6.2V SUB_BL_EN 1.8V If something wrong with the result which we found, please check U1 peripheral components and circuit. Figure 7. Backlight Driver Circuit ( On LCD_PCB board) ASUS Proprietary... -
Page 15: Vibrator Test
3. If the answer is no, please check the open/short on the CPU. 4. Replace the LED1. 2.5.2 Keypad LED fail If the keypad LED will not executed. We can check below items on the LCD_PCB auxiliary board. LED_V+ 6.2V SUB_BL_EN 1.8V (Figure 4 ) ASUS Proprietary... -
Page 16: Camera & Vga Camera Test
Ex. Camera FPC fail 、 lens of the camera dirty 、can’t focus. If the pre-view image also shacking on the screen. Please check the defective or damage on the Coaxial Cable and follow procedure. VCAM_2V8 2.8V, C69 Pin1.If not please check the PMU. ASUS Proprietary... -
Page 17: Sdram & Flash Test
SDRAM & Flash Test SDRAM & Flash Test Due to POP procedure, there will not test point be explored. 1.8V If you can get 1.8V then check the open/short of the memory by X-ray machine. Try to replace the chip. ASUS Proprietary... -
Page 18: Audio Test
R38 both side to avoid soldering issue. Check the R30 Pin2 High ( 1.8V ) c. Can’t record Please check the signal from HSMICP and HSMICN, Please check the related component on soldering issue. ex. C51、C52、 R35. Figure 12. Headset Circuit - 01 ASUS Proprietary... -
Page 19: Speaker
Speaker NO Sound R31、R32 Audio signal (oscillate scope) C46、C49 Audio signal (oscillate scope) If the C46、C49 can be check signal but SPK_P、SPK_N no be measured, please replace the U13 ( Class-D Amp). Figure 14. Class D Amp for speaker ASUS Proprietary... -
Page 20: On-Board Microphone Can't Record
4.8.4 Receiver If Receiver no voice, please check the C1、C2 on the LCD_FPC. If still can’t find any signal , please check Soldering issue( open / short) on the PMU. Please replace the Receiver in the final step. ASUS Proprietary... -
Page 21: Keypad Test
We will use those functions on the U5 I/O controller IC from LCD_PCB. If you can feel the button has pushed after the function can not executed. Please check the signal KPD_INT# and the signal of the U5 by oscillate scope. Figure 16. Keypad controller circuit( On LCD_PCB board) ASUS Proprietary... -
Page 22: Internal Qwerty Keypad
Figure 17. Qwerty Keypad controller circuit 4.10 4.10 BT Test 4.10 4.10 BT Test BT Test BT Test In general should be get follow bellow status Check 26MHz clock Visual inspection R80、R86 Check Pin1 Pin9/Pin10 Short Pin6/Pin7 Short Figure 18. BT circuit ASUS Proprietary... -
Page 23: Wifi Test
U10 on the soldering issue. F. Check U8 Pin3 1.8V (High) Pin5 3.3V G. Check the signal of the R29 will get the dynamic wave by oscillate scope. H. Check 3.3V R142 2.85V Figure 20. WiFi PA Power circuit ASUS Proprietary... - Page 24 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Figure 21. WiFi circuit ASUS Proprietary...
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Page 25: Phone Off
4. Check the schematic related of the U40, try to rework with the U40. Figure 22. Modem Power circuit 5. VDDD_1V5 1.5V VDDE_1V8 1.8V VDDC_2V75 2.75V 6. MOD_POW_ON 1.8V(?) 7. RTC_CLK 32.768 KHz Clock 8. If Item5~7 will Ok, please replace the U39 to improve the condition. ASUS Proprietary... -
Page 26: Modem To System Interface
Modem to System interface The main inter phase which connected from CPU and Modem is constructed by U58 and U59. Please check the soldering condition on the BGA package of the chips(U58、U59) by X-ray detection. Figure 24. Modem UART interface ASUS Proprietary... - Page 27 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Figure 25. Modem/CPU interface ASUS Proprietary...
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Page 28: Power Consumption
We will suggest the chip priority : BGA / CSP package→IC→….. D. The short with GND condition is not obviously, we can use the temperature different to help us judge that soon. ASUS Proprietary... -
Page 29: Rf Repair Requirement
High Frequency Probe with DC Block (connect with a 0603 1µF capacitor) Power Supply Contact 7.3 Equipment Equipment Equipment Equipment ： Test Fixture Oscilloscope Communication tester：Agilent 8960, CMU200 or Anritsu 8820 Digital Multi Meter Power Supply Spectrum Analyzer (up to 3.0 GHz) ASUS Proprietary... -
Page 30: Block Diagram
DB 3150 EGG ANT EGG Front-End XO(26MHz) with WB Switch WBCLK WBTX_IQ SKY77513 WBRX_IQ WB ANT DC/DC VDIGRAD_1V8 Converter VDD_E WB PA WCDMA Duplex Isolator VDD_A SKY77174 (Option) Transceiver Analog BB RF 3100 Controller RX SAW AB 3000 ASUS Proprietary... - Page 31 碩 電 腦 ■ Service Manual 8.2 GSM/GPRS/EDGE(EGG) Block Diagram 1.8V Key Components TX- RX FEM (U801) 1. Quad-Band GSM/GPRS/EDGE 2. Polar EDGE modulation 3. Low input power range ~ 0 to 6 dBm Tx attenuator 1.U811：5dB 2.U810：4dB ASUS Proprietary...
- Page 32 850： ： ： ： BPF800 (BG) 900： ： ： ： BPF801 (TA) 1800： ： ： ： BPF803 (SW) 4.1900： ： ： ： BPF802 (LF) RFIF_TRANSCEIVER_RF3000 (U800) 1. Zero-IF receiver 2. Polar modulation transmitter 26MHz Quartz Crystal (OSC800) 1. C =15pF 10ppm ASUS Proprietary...
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Page 33: Wcdma Block Diagram
3. TX to RX: 57dB WCDMA Transceiver RF3100 (U906) 1. Single band application (UMTS band1) 2. 3GPP release 5, power class 3 3. Zero Intermediate Frequency WCDMA PA (U903) 1. VCC：2.75V 2. VDD：1.8V Coupler (U905) Coupling：19.30 ± 1.00 dB ASUS Proprietary... -
Page 34: Gsm & Wcdma Rf Tx/Rx Path
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 9. GSM & WCDMA RF Tx/Rx Path 9.1 Backside Antenna Area Backside Antenna Area Backside Antenna Area Backside Antenna Area WCDMA GSM Antenna Antenna Feed ASUS Proprietary... -
Page 35: Rx Path
碩 電 腦 ■ Service Manual 9.2 EGG EGG T T T T / R /R /R /R Path Path Path Path X X X X X X X X Tx LB Path Tx HB Path Rx Path ASUS Proprietary... -
Page 36: Wcdma T X /R X Path
Service Manual 9.3 WCDMA WCDMA T T T T / R /R /R /R Path Path WCDMA WCDMA Path Path X X X X X X X X Rx Path Tx Path Power Detector Path PA power supply Path ASUS Proprietary... -
Page 37: Test & Repair Flow Chart
2G fail 2G or 3G fail GSM/GPRS/EDGE Board WCDMA Board Level Test R efer to appendix A for EGG typical values of conductive test ： R efer to appendix B for WCDMA typical values of conductive test ： ASUS Proprietary... -
Page 38: Gsm/Gprs/Edge Test & Repair Procedure
Test & Repair Procedure Test & Repair Procedure How RF signal is transmitted and received between components on M930 PCB will be explained in this section. It is important to realize RF transmission path (Tx) and receiving path (Rx) before starting out to repair NG PCB, because... - Page 39 華 碩 電 腦 華 碩 電 腦 ■ Service Manual 2. Placement on the PCB 3. On the oscilloscope screen (If there is not any wave to appear, please confirm the power supply first) ASUS Proprietary...
- Page 40 Suppose if there is no signal to appear, first, confirm whether crystal is on normal operation. In addition, because add an electric wire at this moment and influence whole C of crystal, the value is not 26MHz definitely, but it’s near. ASUS Proprietary...
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Page 41: Egg Tx Path
10.3 EGG TX Path 10.3 EGG TX Path In M930 because PA has already included in SKY77513, there is no component in TX path. Only a low-pass filter exists in high band path. This filter consists of three components ： C819, C820, and L808. In addition, there is an attenuator on each path. -
Page 42: Probe
華 碩 電 腦 華 碩 電 腦 ■ Service Manual 10.3.1 Probe 0603 1µF/16V A 0603 1µF/16V Fig2 Capacitor 10.3.2 Placement on the PCB ASUS Proprietary... -
Page 43: Measurement Result
1dB. This can only be confirmed TR switch is in normal operation, not guarantee PA normal operation in SKY77513. Need to confirm the value of Vapc, to find that FEM or TR is problematic. ASUS Proprietary... - Page 44 腦 ■ Service Manual Enlarge the TX of Fig2(振幅：amplitude & 寬度：width) Range of Vapc is as follows： Low band 850/EGSM ：PL5 Vapc=1.29(V) ~ PL19 Vapc=0.27( V ) High band 1800/1900 ：PL0 Vapc=1.28(V) ~ PL 15 Vapc=0.26( V ) ASUS Proprietary...
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Page 45: Egg Rx
Later, according to RX of Fig1, confirmed that operation was normal, and observe the frequency of crystal is working or not. Rx Filter packaging is as follows： BG：850 TA：900 LF：1900 SW：1800 ASUS Proprietary... -
Page 46: Gsm/Gprs/Edge Repair Procedure
Tx or Rx path fail Check range of Vapc： U811 (low band) should Low band 0.25(PL19) ~ 1.3V higher than U810 (high (PL5) band) about 1dB Check U811, U810, andU800 Check U801 (SKY77513) Restart EGG Board Level Repair Procedure Recalibration ASUS Proprietary... -
Page 47: Wcdma Test & Repair Procedure
WCDMA does not make FDD, there are no R, T, M phenomenon to take place. Take WCDMA as an example： When already connecting to communication tester. No matter TX or RX are the same. Both of BS1 and TX_EN are low, only BS2 is high ( ‘1 ’ is 1.8V). ASUS Proprietary... -
Page 48: Wcdma Tx
WCDMA transceiver first. Its power parts are divided into two parts: Analog (check R909 is 2.75V) and Digit (check R919 is 1.8V). In WCDMA TX part, both of I and Q channel are QPSK signal (R921, R923, R925, and R929). ASUS Proprietary... - Page 49 Pay attention to the value only for confirming whether the component is normal, does not represent real power value. Check PA output (C927(it’s a resistor R)) Conductive Power is 23dBm (CON900) PA Gain Condition： In high power mode is more than 27dB. ASUS Proprietary...
- Page 50 This is divided into two parts：One is power supplied and the other is power detector. DC/DC converter is used to reduce WCDMA power consumption. VCC _ PA is divided into two pieces of power：One is VCC1 (3.15V) for driving amplifier and the other is VCC2 (3.15V) for power amplifier. ASUS Proprietary...
- Page 51 RF_DAC2. DAC1 gives PA, and DAC2 gives DC/DC converter. In 23dBm, both of DAC1 (R910) and DAC2 (R905) are all 1.27 V；In 11dBm, DAC1 is 670mV and DAC2 is 570mV. Power detector is used to feedback power to DB3150, to transmitter correct wanted power. U910 ASUS Proprietary...
- Page 52 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Check WPOW_SENSE (U910 input) = PA output power - 20dBm ： Coupling is 20dB. Check power detector output (R904) = WPOW_SENSE – 15dBm ： Attenuator is 15dB. ASUS Proprietary...
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Page 53: Wcdma Rx
RF3100 that amplifies the RX signal. Because the strength of RX signal is too small, so spectrum must have some extra setup. In order to observe the signal easily, must strengthen BCH to - 30dBm. Check MIX1 input (L900) ASUS Proprietary... -
Page 54: Wcdma Test & Repair Procedure
Change U906 RF3100 Check R912 power Check U905, U904, and U900 by Check C927 power relationship. PA output has power Check power detector system (U910 and normal Check power supply system (R905 and Restart WCDMA Board Level Repair Procedure Recalibration ASUS Proprietary... -
Page 55: Appendix
Appendix A Appendix B Appendix B Appendix B Appendix B Band WCDMA 9612 9612 9612 9612 9750 9750 9750 9750 9888 9888 9888 9888 ARFCN 23.5 23.5 23.5 23.5 23.5 23.5 23.5 23.5 23.5 23.5 23.5 23.5 Conductive Power(dBm) ASUS Proprietary... -
Page 56: Ppendix C
This document describes the operating method by using E-Tool for EMP U360. 2. Set Slot ID Step 1 The E-Tool V1.0 dialog box will show when you execute P_E_tool.exe. Step 2 Choose Function->Slot ID, and click it to Set Slot ID automatically. ASUS Proprietary... - Page 57 It will show the following dialog , click “確定” to continue. Step 4 It will show the following dialog, turn on inactive DUT, to click “Abort” to continue. Step 5 If it shows the following dialog , click“確定” and please repeat Step2 through to Step4 . ASUS Proprietary...
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Page 58: Switch To Tp Mode
華 碩 電 腦 ■ Service Manual Step 6 If the following dialog appeared, it represents Set Slot ID successfully. 3. Switch to TP Mode Step 1 The E-Tool V1.0 dialog box will show when you execute P_E_tool.exe. ASUS Proprietary... - Page 59 Choose Function->TP Mode, and click it to make the DUT switch into TP mode. Step 3 It will show the following dialog, turn on inactive DUT, to click “Abort” to continue. Step 4 If it shows the following dialog , click“確定” and please repeat Step2 through to Step3. ASUS Proprietary...
- Page 60 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Step 4 If the following dialog appeared, it represents DUT switched into TP mode successfully. ASUS Proprietary...
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Page 61: Operating Method
碩 電 腦 ■ Service Manual 4. Operating Method GSM PART Step 1 The E-Tool V1.0 dialog box will show when you execute P_E_tool.exe. Step 2 Choose Function->U360->GSM, and click GSM to show GSM_U360_form dialog box. Step 3 ASUS Proprietary... - Page 62 腦 華 碩 電 腦 ■ Service Manual Choice comport number to communicate with M930 (seen by computer). Step 4 Chose which TP command to send Set GSM Static TX Set GSM Switched TX Set GSM Static RX ASUS Proprietary...
- Page 63 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Set GSM Switched RX Reset the GSM Radio ASUS Proprietary...
- Page 64 華 碩 電 腦 華 碩 電 腦 ■ Service Manual WCDMA PART Step 1 The E-Tool V1.0 dialog box will show when you execute P_E_tool.exe. Step 2 Choose Finction->U360->WCDMA, and click WCDMA to show WCDMA_U360_form dialog box. ASUS Proprietary...
- Page 65 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Step 3 Choice comport umber to communicate with M930. Step 4 Choice Band MODE to send the TP command Set WCDMA TX Set WCDMA RX ASUS Proprietary...
- Page 66 華 碩 電 腦 華 碩 電 腦 ■ Service Manual POWER Sense ADC Read Result is showed as below ASUS Proprietary...
- Page 67 華 碩 電 腦 華 碩 電 腦 ■ Service Manual Step 5 Reset WCDMA Radio ASUS Proprietary...