PROBLEM 16.8 S : ..................37 WITCH CONNECTOR PROBLEM 16.9 V :.....................37 IBRATOR PROBLEM 17.POWER CONSUMPTION TEST...................38 17.1 E ....................38 NVIRONMENT ETTING 17.2 D ......................38 LEEP 17.3 S ..................39 TANDBY LEEP 17.4 C ....................42 HARGING URRENT - 3 - ASUS Proprietary...
Lv3Lv4 Repair Manual 6.BaseBand Repair Abstract: For the training, the document mainly describes how to repair P735 if main board was damaged. Another topic focuses on EPE bug list from SR to DVT according to every run of repairing experience.
華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 8.2 ID Concept 9.Test Set and Tool 9.1 Power Supply MOTECH programmable DC power Supply or equivalence *1 - 14 - ASUS Proprietary...
5.3.6 Whether it is intact and damaging to examine PCB PAD in item after using the sanitizer to polish PCB PAD clean. 5.3.7 Use the soldering paste to daub on PCB PAD, put the new part and rework. - 19 - ASUS Proprietary...
5.4.4 While changing the part, there is a apt part damaged around to find the part , use and defend.the sticky tape to protect, prevent the part from being destroyed. 11.5 Under fill Chips Location - 20 - ASUS Proprietary...
華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 14. P735 Repair Notice Part : 14.1 SR Notice List Station Problem Preliminary Root Cause Remark Symptom Analysis Can not Connector is Connector is damaged by preview form...
Sleep mode leakage current is U20(PMU) issue. level current fail from U20(PMU) to cause charge fail Board Earphone_L Audio amplify L U14(audio amp.) level FREQ FAIL path fail cause to issue earphone L freq no sound - 24 - ASUS Proprietary...
Lv3Lv4 Repair Manual 15 Troubleshooting 15.1 Debug process Inspect PCBA (any chip or mechanical component damaged ?) Fail Current abnormal Inspect consumed current Rework Damaged Component Run diagnosis app. Pass all test items? Repair O.K - 25 - ASUS Proprietary...
4. Inspect crystal of hermon and CPU or CS (Chip Select) from flash memory, if the current = 200 ~ 230mA. 5. If the consumed current is over 300mA, please check PMU, peripheral device and other chip. Bulverde power on sequence and timing - 26 - ASUS Proprietary...
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華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual Hermon power on sequence and timing Sys_EN C224 PWR_EN D30 nReset TP71 - 27 - ASUS Proprietary...
5. Inspect LCD back light driver as shown in Pig.5-3, if panel can not drive back light. Pig.5-1 61 pin of LCD connector and power domain located in P735 bottom side Pig.5-2 PCLK, FCLK and LCLK - 28 -...
MIC no sound 1.Inspect MIC if damaged。 2. Inspect voltage level of audio headset detect pin,if level is low , audio will be directed to headset。 3. Inspect bias of MIC。 4. Inspect soldering of MIC。 - 29 - ASUS Proprietary...
1. Inspect connect between 2M camera FPC and camera FPC connector。 2. Inspect if 2M camera module damaged。 3. Inspect power domain of camera module 。 4. Inspect signal on camera data bus to further clarify it is CPU side problem or camera side problem. - 30 - ASUS Proprietary...
2. Inspect metal dome of keypad as shown in Pig.6-2, if function key can not work. 3. Inspect key matrix of CPU as shown in Pig.6-1, if part of function key can not work. Pig.6-1 keypad connector and key matrix are located in P735 bottom side. Pig.6-2 Metal dome of P735 QWERTY keypad.
3. Inspect mini-SD card data path as shown in Pig.7-2, if mini-SD card can not be read data. Pig.7-1 Mini-SD card connector is located in P735 top side. Pig.7-2 power domain and data pin of mini-SD card sign in red box.
2. Inspect I2C path which connect to camera module as shown in Pig.8, if camera device can not be detected. (I2C_SCL_2M U209.1)(I2C_SDA_2M U209.5) Pig.8 camera connector is located in P735 bottom side. 16.4 BT problem: 1. Inspect power domain of Bluetooth as shown in Pig.9, if BT can not work.(+2V8_BT R21.1)(+1V5_BT_REG1 R23.2) (+1V5_BT_REG2 R23.1)
3. Inspect unlock SIM card program, if SIM card can not be detected. Pig.10 SIM card connector is located in P735 bottom side. 16.6 Audio problem: 1. Inspect speaker, receiver and handset connectors, if the sound can not work.
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華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual Pig.11-2 Codec and audio amplify are located in P735 bottom side. - 35 - ASUS Proprietary...
1. Inspect USB connector as shown in Pig.12-1. , if USB can not charge or can not connect to PC using Activesync. 2. Inspect PMU as shown in Pig.12-2, if USB can not work. Pig.12-1 pin define of USB connector sign in P735 top side. Pig.12-2 PMU is located in P735bottom side. - 36 -...
Pig.13 Switches are located in P735 top side. 16.9 Vibrator problem: 1. Inspect power domain of Vibrator as shown in Pig.14, if it can not work. Pig.14 Vibrator connector is located in P735 bottom side. - 37 - ASUS Proprietary...
DC Source Setting : Current 1A Voltage 3.8V~4V Positive Pin 1 Negative Pin 3 17.2 Deep Sleep Mode 1.When we setup the environment complete, the current consumption can be measure by the DC Power Meter. - 38 - ASUS Proprietary...
電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 17.3 Standby Mode/Sleep Mode 1. Power on the Smartphone. 2. Finish Open Mode , click the Power On button 3. Select the B Wireless Manager - 39 - ASUS Proprietary...
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5. Make Sure the Backlight from LCM and Keypad is ON. 6. Measure the Current consumption (standby mode ) refer to the table 13-1. 7. After 15 seconds , we will take the second data from the DC Source Meter LCD On Light Off Keypad - 40 - ASUS Proprietary...
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華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 8. Sleep mode : After the 1 minute later ,the LCM signal will be off. - 41 - ASUS Proprietary...
碩 電 腦 ■ Lv3Lv4 Repair Manual 9.Measure the Current consumption (sleep mode ) refer to the table 13-1. 17.4 Charging Current Test 1. Set Up the Environment DC Source setting : 5V / 2A - 42 - ASUS Proprietary...
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華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 2. Charger fixture modify Notice Pin assignment for the Mini USB 5P Positive Negative 3. Plug in the cable . - 43 - ASUS Proprietary...
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電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 4.The charging Indicate LED will On. 5.REFER TO BELOW TABLE WITH THE MEASUREMENT. Test Item Min Value Max Value Normal Charging Current consumption 490mA 510mA - 44 - ASUS Proprietary...
18.3 Equipment: : : : 1. PC 2. Spectrum Analyzer (up to 3.0 GHz) 3. Signal Generator (up to 3.0GHz) 4. Communication tester: Agilent 8960, CMU200 or Anritsu 8820 5. Digital Multi-meter 6. Power Supply - 45 - ASUS Proprietary...
Lv3Lv4 Repair Manual 21. GSM & WCDMA RF Tx/Rx Path How RF signal is transmitted and received between components on P735 PCB is 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 engineers need to choose proper test points which assist us to distinguish where the problem is.
RMPA2259 Pin2 sequentially. The output power coming from RMPA2259 Pin8 passes through isolator (U954), duplexer Pin1 (U956), and connector (Con851). At last, the RF signal is radiated via WCDMA antenna of P735. 21.4 WCDMA Rx path RF signal in WCDMA, receiving from base station via the WCDMA antenna, passes through connector (Con851) and duplexer Pin3 sequentially.
USIM, check if both 2G/3G signal OK? Update the latest firmware Test complete *1:Refer to appendix A1 for GSM/GPRS typical values of conductive test *2:Refer to appendix A2 for WCDMA typical values of conductive test - 55 - ASUS Proprietary...
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Change U901 (RF2722) Reheat or change Run CMU go Hermon production tests Still failed by changing U901 *1:Refer to appendix B1 for Tx test environment setup *2:Refer to appendix B2 for Rx test environment setup - 56 - ASUS Proprietary...
Change U953 WCDMA.T4 (RMPA2259) signal OK? Still failed by change U958 Run CMU go Change BPF5 WCDMA.T5 Reheat or change production tests (Tx SAW) signal OK? Hermon Change U957 (MAX2395) Still failed by changing U957 - 57 - ASUS Proprietary...
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華 碩 電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual *1:Refer to appendix B1 for Tx test environment setup *2:Refer to appendix B2 for Rx test environment setup - 58 - ASUS Proprietary...
腦 ■ Lv3Lv4 Repair Manual 23. Test Points Signal Examples 23.1 GSM900 Due to the spec of probe is not exactly the same, please use the “working sample” for signal reference. GSM.ANT1: GSM.ANT2 & GSM.TL1 - 60 - ASUS Proprietary...
電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 23.2 DCS1800 Due to the spec of probe is not exactly the same, please use the “working sample” for signal reference. GSM.ANT1 GSM.ANT2 & GSM.TH1 - 63 - ASUS Proprietary...
電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 23.3 PCS1900 Due to the spec of probe is not exactly the same, please use the “working sample” for signal reference. GSM.ANT1 GSM.ANT2 & GSM.TH1 - 66 - ASUS Proprietary...
電 腦 華 碩 電 腦 ■ Lv3Lv4 Repair Manual 23.4 WCDMA Due to the spec of probe is not exactly the same, please use the “working sample” for signal reference. WCDMA.ANT1 WCDMA.ANT2 (Tx ) - 69 - ASUS Proprietary...
23.5 Bluetooth Turn on the phone, make sure if BT can be enable. (1)Confirm if BT is enabled or not BT Disable BT Enable (2)Turn off Bluetooth functionality: Start My settings Bluetooth Turn off BT - 75 - ASUS Proprietary...
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Let BT chip transmit its maximum power at 2441MHz. (iv) TXSTART 2480 : Let BT chip transmit its maximum power at 2480MHz. (v) BT Module Test : Test the connection between BT Module and BaseBand. - 76 - ASUS Proprietary...
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Lv3Lv4 Repair Manual (6)Choose one of three option 2, 3, 4, and select it. (7)While the program is running, please do not running another option in the meantime or the program will show error message “ADFS06”. - 77 - ASUS Proprietary...
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Apparently, the wireless performance will differ within ±2dBm. If the deviation of DUT is beyond the normal value, go straight for next step. * The testing position should be the same with golden sample to reduce testing uncertainty. BT Antenna in Bottom side - 78 - ASUS Proprietary...
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Afterwards, the BT output power still abnormal, change the BT chip. Antenna feed pin BT Area P735 bottom view BT area Balance Filter BT Output BT Chip testing point 1...
+/- 1.5 9750 1950 (all up bit) 9888 1977.6 WCDMA Rx Typical Value Sensitivity Level - BER < 0.1% (dBm) Frequency. Band Channel No. Maximum (MHz) 10562 2112.4 WCDMA Rx -111 10700 2140 10838 2167.6 - 80 - ASUS Proprietary...
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2. Specific Fixture for repair and test, including Hermon USB contact Power Supply contact 3. RF Probe with DC block and RF cable (30cm) 4. Spectrum Analyzer 5. Digital Multi-meter Example of Tx Test Environment Setup: - 81 - ASUS Proprietary...
2. Specific Fixture for repair and test, including Hermon USB contact Power Supply contact C. RF connector and RF cable 3. RF Probe with DC block and RF cable (30cm) 4. Signal Generator Example of Rx Test Environment Setup: - 82 - ASUS Proprietary...