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CSC

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Lv3Lv4 Repair Manual

- 54 -

ASUS Proprietary

華

碩

電

腦

receiver, down converted the signal’s frequency and transformed into IQ signals. The

IQ signals from RF2722 Pin20, Pin21, Pin22, and Pin23 travel to the transceiver

RF6001 (U900). The transceiver RF6001 transfers the signals to the baseband

signals.

In DCS1800 band, the receiving signal which is transmitted from T/R switch

Pin14 passes through SAW filter (BPF4) and matching circuits sequentially. Upon

RF2722 (U901) receiving the signal, it is amplified in the Low Noise Amplifier (LNA) of

the receiver, down converted the signal’s frequency and transformed into IQ signals.

The IQ signals from RF2722 Pin20, Pin21, Pin22, and Pin23 travel to the transceiver

RF6001 (U900). The transceiver RF6001 transfers the signals to the baseband

signals.

In PCS1900 band, the receiving signal which is transmitted from T/R switch

Pin15 passes through SAW filter (BPF3) and matching circuits sequentially. Upon

RF2722 (U901) receiving the signal, it is amplified in the Low Noise Amplifier (LNA) of

the receiver, down converted the signal’s frequency and transformed into IQ signals.

The IQ signals from RF2722 Pin20, Pin21, Pin22, and Pin23 travel to the transceiver

RF6001 (U900). The transceiver RF6001 transfers the signals to the baseband

signals.

21.3 WCDMA Tx path

The output signal from transmitter MAX2395 Pin2 travels to SAW filter (BPF5),

and 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. MAX2391 Pin9

(U958), built-in LNA, receives the signal from duplexer. Then the signal is transmitted

to SAW filter (BPF6) and returns to receiver MAX2391 again. After down converting

the signal’s frequency and transforming into IQ signals, the IQ signals from MAX2391

Pin20, Pin21, Pin22, and Pin23 travel to baseband.

Содержание P735

Страница 1: ...CSC Lv3Lv4 Repair Manual 1 ASUS Proprietary 華華碩碩電電腦腦 ASUS P735 Service Manual ...

Страница 2: ... BASEBAND REPAIR ABSTRACT 13 7 INTRODUCTION 13 8 1SPECIFICAITONS 13 8 2 ID CONCEPT 14 9 TEST SET AND TOOL 14 9 1 POWER SUPPLY 14 9 2 OSCILLOSCOPE 15 9 3 MICROSCOPE 15 9 4 OTHER ME TOOL 15 9 5 P735 CHARGER 16 10 PCBA OUTLOOK 17 10 1 PCBA TOP SIDE 17 10 2 PCBA BOTTOM SIDE 18 11 UNDERFILL REWORK NOTICE 19 11 1 SCOPE 19 11 2 NECESSARY TOOLAND EQUIPMENT 19 11 3 WORK METHOD 19 11 4 PRECAUTIONS 20 11 5 U...

Страница 3: ...30 BLUE TOOTH ABNORMAL 30 KEYPAD ABNORMAL 30 SIDE KEY 30 Key pad FPC 30 CAMERA ABNORMAL 30 2M CAMERA no preview 30 Preview abnormal 30 16 TROUBLE SHOOTING 31 16 1 QWERTY KEYPAD PROBLEM 31 16 2 MICRO SD CARD PROBLEM 32 16 3 CAMERA PROBLEM 33 16 4 BT PROBLEM 33 16 5 SIM CARD PROBLEM 34 16 6 AUDIO PROBLEM 34 16 7 USB PROBLEM 36 16 8 SWITCH CONNECTOR PROBLEM 37 16 9 VIBRATOR PROBLEM 37 17 POWER CONSUM...

Страница 4: ...TS 50 20 2 GSM GPRS TEST POINTS 50 20 3 WCDMA TEST POINTS 52 21 GSM WCDMA RF TX RX PATH 53 21 1 GSM TX PATH 53 21 2 GSM RX PATH 53 21 3 WCDMATX PATH 54 21 4 WCDMARX PATH 54 22 RF TEST REPAIR FLOW CHART 55 22 1 CONDUCTIVE ANTENNA TEST PROCEDURE 55 22 3 WCDMATEST REPAIR PROCEDURE 57 22 4 BLUETOOTH TEST REPAIR PROCEDURE 59 23 TEST POINTS SIGNAL EXAMPLES 60 23 1 GSM900 60 23 2 DCS1800 63 23 3 PCS1900 ...

Страница 5: ...Class B Multi slot Class 10 WCDMA 384 kbps Class UL DL 384k Operation System Microsoft Windows Mobile 6 0 OS 3G RF BB Intel Hermon Dual mode RF AFE PA CPU Marvelll PXA270 520 MHz Memory 256MB Flash 64 MB SDRAM Extended Memory mini SD Card Antenna Build in solution Bluetooth Bluetooth V2 0 spec Class 2 3GPP Video Streaming and Video Telephony Messaging SMS MMS WAP2 0 JAVA MIDP2 0 JSR184 Etc LCM Mai...

Страница 6: ...CSC Lv3Lv4 Repair Manual 14 ASUS Proprietary 華華碩碩電電腦腦 8 2 ID Concept 9 Test Set and Tool 9 1 Power Supply MOTECH programmable DC power Supply or equivalence 1 ...

Страница 7: ... Manual 15 ASUS Proprietary 華華碩碩電電腦腦 9 2 Oscilloscope Tektrniox TDS5054B Digital Phosphor Oscilloscope or equivalence 1 Bandwidth 200MHz 9 3 Microscope 10X 40X 9 4 Other ME Tool Plastic wrench Screwdriver T5 and 00 ...

Страница 8: ...CSC Lv3Lv4 Repair Manual 16 ASUS Proprietary 華華碩碩電電腦腦 9 5 P735 Charger The default charger adaptor for P735 is TAMURA PACIFIC JSP050090UC Meanwhile P735 support USB charging with 500mA ...

Страница 9: ...CSC Lv3Lv4 Repair Manual 17 ASUS Proprietary 華華碩碩電電腦腦 10 PCBA Outlook 10 1 PCBA TOP side ...

Страница 10: ...CSC Lv3Lv4 Repair Manual 18 ASUS Proprietary 華華碩碩電電腦腦 10 2 PCBA Bottom side ...

Страница 11: ...thod 5 3 1 It must last 8 hours to toast PCB board by 125 degrees Centigrade before the rework of underfill 5 3 2 Use the hot air gun to invite 10cm distance above the part and set up and heat time as 20sec use the tweezers to remove glueing in the white glue part of BGA 5 3 3 Use BGA machine to remove the underfill part the temperature is set up to 255 degrees use the tweezers to remove component...

Страница 12: ...es Centigrade scale 5 4 2 Before cleaning the glue movements really implement the ESD 5 4 3 After using the cleaner to polish and then observe the part and around have PU incomplete glue 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 ...

Страница 13: ...CSC Lv3Lv4 Repair Manual 21 ASUS Proprietary 華華碩碩電電腦腦 12 P735 Block Diagram ...

Страница 14: ... shooting guide line to debug 100 200mA Inspect hermon interface MSL or other damarged peripheral chips 200 230mA Inspect crystal of hermon and cpu or cs chip select No Yes START STOP 1 prepare tools 2 set voltage 3 8 4 2 V 3 set limited current 2A Run diagnosis program Show logo and boot OS display No Yes Run next test item Yes Yes No No Over 300mA Inspect whether PMU or peripheral chip is leakag...

Страница 15: ...il SIM Connector is damaged or data bus pin fail can t build network lock so SIM card detect fail SYS MMI No boot U1 CPU or U20 PMU fail SMT issue solder ball of U1 is short circuit 14 2 ER1 Notice List Station Problem Symptom Preliminary Analysis Root Cause Remark Board level MMI MIC no function U19 codec fail Solder ball of U19 is short circuit to cause MIC no function SYS MMI Can t not preview ...

Страница 16: ... Toppoly LCD issue 14 3 ER2 Notice List Station Problem Symptom Preliminary Analysis Root Cause Remark Board level MMI Sleep mode current fail CE3 RTC is short circuit so it cause leakage current in standby mode SMT issue Board level MMI Sleep mode current fail OS can not suspend resume to cause sleep mode current fail U1 CPU issue Board level MMI Sleep mode current fail leakage current is from U2...

Страница 17: ...tary 華華碩碩電電腦腦 15 Troubleshooting 15 1 Debug process No YES Yes Inspect PCBA any chip or mechanical component damaged Inspect consumed current Run diagnosis app Pass all test items Repair O K Current abnormal Rework Damaged Component Fail ...

Страница 18: ...ormal Sometimes it caused by PMIC ADC error therefore cause HW version detection error 5 If current going down suddenly to 0 mA while booting a Inspect power domain and clock of Bulverde and Hermon b Inspect Bulverde power on sequence clarify CPU side problem or PMIC side problem No boot 1 Inspect power on timing of CPU and PMU as show in Pig 3 and Pig 4 if the current 0 mA 2 Inspect PMU power dom...

Страница 19: ...CSC Lv3Lv4 Repair Manual 27 ASUS Proprietary 華華碩碩電電腦腦 Hermon power on sequence and timing Sys_EN C224 PWR_EN D30 nReset TP71 ...

Страница 20: ...al of CPU as shown in Pig 5 2 if panel appear white monitor 3 Inspect FCLK C779 2 signal of CPU as shown in of Pig 5 2 if panel appear horizontal line 4 Inspect LCLK C780 2 signal of CPU as shown in of Pig 5 2 if panel appear shift monitor 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 si...

Страница 21: ... signal from CODEC if no signal further check CODEC if normal Speaker no sound 1 Inspect contact of speaker and spring 2 Inspect voltage level of audio headset detect pin if level is low audio will be directed to headset 3 Inspect speaker if damaged 4 Inspect speaker signal from PMIC if no signal further check PMIC if normal MIC no sound 1 Inspect MIC if damaged 2 Inspect voltage level of audio he...

Страница 22: ...d FPC 1 Inspect connect between key pad FPC and connector 2 Inspect metal dome on key pad FPC Camera abnormal 2M CAMERA no preview 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 Camera I2C 5 Inspect MCLK if normal Preview abnormal 1 Inspect connect between 2M camera FPC and camera FPC connecto...

Страница 23: ...tor as shown in Pig 6 1 if function key can not work 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 ...

Страница 24: ...e read data or detect SD device 2 Inspect mini SD card power domain as shown in Pig 7 2 if mini SD card can not be read data or detect SD card device 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 ...

Страница 25: ...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 2 Inspect BT module as shown in Pig 9 if BT can not be detected 3 Inspect crystal which supported BT as shown in Pig 9 if BT can not ...

Страница 26: ...ected 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 2 Inspect handset detect pin low level as shown in Pig 11 1 if the sound of speaker or receiver can not work 3 Inspect audio amplify chip as shown in Pig 11 2 if handset include sound and record can not be work 4 Inspect power domain of Codec...

Страница 27: ...CSC Lv3Lv4 Repair Manual 35 ASUS Proprietary 華華碩碩電電腦腦 Pig 11 2 Codec and audio amplify are located in P735 bottom side ...

Страница 28: ...oblem 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 ...

Страница 29: ...tor problem 1 Inspect switch connector as shown in Pig 13 if switch can not work 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 ...

Страница 30: ... measure 2 8mA 3 8mA OFF Mode Current consumption measure 0 13mA 0 20mA Table 13 1 Power consumption 1 Standby mode Phone off LCD backlight Keypad LED on 2 Standby mode Phone off LCD backlight Keypad LED off after 15 sec 3 Sleep mode Phone off LCD off after 1 min 4 Off Deep Sleep 17 1 Environment Setting DC Source Setting Current 1A Voltage 3 8V 4V 17 2 Deep Sleep Mode 1 When we setup the environm...

Страница 31: ...CSC Lv3Lv4 Repair Manual 39 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 32: ... into Flight Mode RF signal all will be disable 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 LED OFF ...

Страница 33: ...CSC Lv3Lv4 Repair Manual 41 ASUS Proprietary 華華碩碩電電腦腦 8 Sleep mode After the 1 minute later the LCM signal will be off ...

Страница 34: ...CSC Lv3Lv4 Repair Manual 42 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 35: ...CSC Lv3Lv4 Repair Manual 43 ASUS Proprietary 華華碩碩電電腦腦 2 Charger fixture modify Notice Pin assignment for the Mini USB 5P 3 Plug in the cable Positive Negative _ ...

Страница 36: ...Lv4 Repair Manual 44 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 37: ...Specific fixture for repair and test following must be included 1 Hermon USB Contact and USB Cable 2 Power Supply Contact 3 RF Connector and RF cable 30cm 4 High Frequency Probe with DC Block 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 ...

Страница 38: ...華碩碩電電腦腦 19 P735 RF Block Diagram 19 1 System Block Diagram WCDMA Maxim 3G Bulverde App CPU AFE Codec Cedar Creek Mini SD Gas Gauge Camera Mini USB Keypad Hermon Comm CPU GSM RFMD BT WLAN SD RAM FLASH MIC Receiver Phone Jack Speaker LCD PMIC USIM ...

Страница 39: ...CSC Lv3Lv4 Repair Manual 47 ASUS Proprietary 華華碩碩電電腦腦 19 2 GSM GPRS GSM RFMD Polaris I Block Diagram ...

Страница 40: ...CSC Lv3Lv4 Repair Manual 48 ASUS Proprietary 華華碩碩電電腦腦 19 3 WCDMA Maxim 3G Block Diagram ...

Страница 41: ...CSC Lv3Lv4 Repair Manual 49 ASUS Proprietary 華華碩碩電電腦腦 19 4 Bluetooth CSR BC04 Block Diagram 1 BT Introduction Frequency 2402 ch0 2480 ch78 MHz Maximum Transmitter power 6 4 dBm 2 Bluetooth circuitry ...

Страница 42: ...st Points Location 20 1 Backside Antenna Area Test Points 20 2 GSM GPRS Test Points Definition of test points suffix 1 TH Tx Highband DCS1800 PCS 1900 2 TL Tx Lowband GSM900 3 RG Rx GSM900 4 RP Rx PCS1900 5 RD Rx DCS1800 WCDMA ANT1 GSM ANT1 WCDMA RF Connector GSM RF Connector ...

Страница 43: ...CSC Lv3Lv4 Repair Manual 51 ASUS Proprietary 華華碩碩電電腦腦 GSM ANT2 GSM TH1 GSM TL1 GSM TL2 GSM TH2 GSM TL3 GSM TH3 GSM RD1 GSM RP1 GSM RG1 GSM RD2 GSM RP2 GSM RG2 ...

Страница 44: ...CSC Lv3Lv4 Repair Manual 52 ASUS Proprietary 華華碩碩電電腦腦 20 3 WCDMA Test Points WCDMA ANT2 WCDMA T1 WCDMA T2 WCDMA T3 WCDMA T4 WCDMA T5 WCDMA R1 WCDMA R2 WCDMA R3 ...

Страница 45: ...Transmission and receiving switch U902 also named T R switch gets the amplified signal from RF3166 Pin23 via matching circuits RF signal coming from T R switch Pin12 is transmitted to connector Con850 and radiated via the GSM antenna of P735 In the high band output signal from RF2722 Pin13 passes through C934 attenuator U905 and RF3166 U904 Pin1 power amplifier sequentially Transmission and receiv...

Страница 46: ...rcuits sequentially Upon RF2722 U901 receiving the signal it is amplified in the Low Noise Amplifier LNA of the receiver down converted the signal s frequency and transformed into IQ signals The IQ signals from RF2722 Pin20 Pin21 Pin22 and Pin23 travel to the transceiver RF6001 U900 The transceiver RF6001 transfers the signals to the baseband signals 21 3 WCDMA Tx path The output signal from trans...

Страница 47: ...dure N Proceed to 2G Board Level Test Repair Procedure Y Test complete Change new antenna 3G Registration OK Tx Rx Signal Normal 3 Y Check the antenna appearance and contact OK Update the latest firmware N N Insert real 3G USIM check if both 2G 3G signal OK Y Y N Proceed to 3G Board Level Test Repair Procedure 1 Refer to appendix A1 for GSM GPRS typical values of conductive test 2 Refer to appendi...

Страница 48: ...ch Change U904 RF3166 Change U903 or U905 Attenuator Y Change U901 RF2722 Y N GSM RG1 GSM RD1 GSM RP1 signal OK Y Y Change U902 T R Switch N Change BPF1 BPF3 or BPF4 Rx SAW N Reheat or change Hermon GSM TH2 GSM TL2 signal OK GSM TH3 GSM TL3 signal OK GSM RG2 GSM RD2 GSM RP2 signal OK Y N Run CMU go production tests Still failed by changing U901 GSM RF Connector U902 U901 are Tx Rx common devices T...

Страница 49: ...ent 2 Run Rx Debug Tool Y N Change WCDMA RF Connector Y N N N Change U956 Duplexer Y Change U951 MAX1820 N Change U954 Isolator Y Change U953 RMPA2259 Y Change BPF5 Tx SAW Y N Change U957 MAX2395 Y N WCDMA R1 signal OK Y WCDMA R2 signal OK Y Change U956 Duplexer N Change U958 MAX2391 N Reheat or change Hermon Still failed by change U958 Still failed by changing U957 Run CMU go production tests WCD...

Страница 50: ...CSC Lv3Lv4 Repair Manual 58 ASUS Proprietary 華華碩碩電電腦腦 1 Refer to appendix B1 for Tx test environment setup 2 Refer to appendix B2 for Rx test environment setup ...

Страница 51: ...CSC Lv3Lv4 Repair Manual 59 ASUS Proprietary 華華碩碩電電腦腦 22 4 Bluetooth Test Repair Procedure ...

Страница 52: ...epair Manual 60 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 53: ...CSC Lv3Lv4 Repair Manual 61 ASUS Proprietary 華華碩碩電電腦腦 GSM TL2 GSM TL3 GSM RG1 ...

Страница 54: ...CSC Lv3Lv4 Repair Manual 62 ASUS Proprietary 華華碩碩電電腦腦 GSM RG2 ...

Страница 55: ...CSC Lv3Lv4 Repair Manual 63 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 56: ...CSC Lv3Lv4 Repair Manual 64 ASUS Proprietary 華華碩碩電電腦腦 GSM TH2 GSM TH3 GSM RD1 ...

Страница 57: ...CSC Lv3Lv4 Repair Manual 65 ASUS Proprietary 華華碩碩電電腦腦 GSM RD2 ...

Страница 58: ...CSC Lv3Lv4 Repair Manual 66 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 59: ...CSC Lv3Lv4 Repair Manual 67 ASUS Proprietary 華華碩碩電電腦腦 GSM TH2 GSM TH3 GSM RP1 ...

Страница 60: ...CSC Lv3Lv4 Repair Manual 68 ASUS Proprietary 華華碩碩電電腦腦 GSM RP2 ...

Страница 61: ...CSC Lv3Lv4 Repair Manual 69 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 62: ...CSC Lv3Lv4 Repair Manual 70 ASUS Proprietary 華華碩碩電電腦腦 WCDMA T1 WCDMA T2 ...

Страница 63: ...CSC Lv3Lv4 Repair Manual 71 ASUS Proprietary 華華碩碩電電腦腦 WCDMA T3 WCDMA T4 ...

Страница 64: ...CSC Lv3Lv4 Repair Manual 72 ASUS Proprietary 華華碩碩電電腦腦 WCDMA T5 WCDMA ANT2 Rx ...

Страница 65: ...CSC Lv3Lv4 Repair Manual 73 ASUS Proprietary 華華碩碩電電腦腦 WCDMA R1 WCDMA R2 ...

Страница 66: ...CSC Lv3Lv4 Repair Manual 74 ASUS Proprietary 華華碩碩電電腦腦 WCDMA R3 ...

Страница 67: ... 75 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 68: ... the following menu i BT Test Mode This option is used only for Anritsu885X series equipment ii TXSTART 2402 Let BT chip transmit its maximum power at 2402MHz iii TXSTART 2441 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 ...

Страница 69: ... Manual 77 ASUS Proprietary 華華碩碩電電腦腦 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 ...

Страница 70: ... Measuring wireless performance via BT test program first You may need to put the phone on shielding box or TEM cell to insure no other interference By comparing the golden sample s normal output value you can judge the functionality of BT 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 sh...

Страница 71: ...ut testing point2 yellow circle via RF probe the output power will between 5 3 dBm normally iii If the output power still be abnormal change the balance filter and go back to step ii You should notice that the balance filter has its own orientation so change it carefully iv Afterwards the BT output power still abnormal change the BT chip P735 bottom view BT area BT Output testing point 1 Antenna f...

Страница 72: ...85 1879 8 512 1930 2 661 1960 810 1989 8 1 EGSM900 29 5 1 GSM GPRS Rx Typical Value Sensitivity Level BER 2 dBm Maximum 104 GSM GPRS Tx Typical Value EGSM900 DCS1800 PCS1900 5 32 5 1 0 0 29 5 103 103 DCS1800 PCS1900 24 2 Typical Value of WCDMA Conductive Tx Rx Test Band Channel No Frequency MHz Power Level Typical Output Power dBm Tolerence dB 9612 1922 4 9750 1950 9888 1977 6 Band Channel No Freq...

Страница 73: ...Tx Test Environment Setup Equipments Required 1 PC 2 Specific Fixture for repair and test including A Hermon USB contact B 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 ...

Страница 74: ...Test Environment Setup Equipments Required 1 PC 2 Specific Fixture for repair and test including A Hermon USB contact B 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 ...

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