FLY FS501 Скачать руководство пользователя страница 10 | Manualshive

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FLY FS501 Скачать руководство пользователя страница 10

FLY SERVICE SUPPORT

2.

3 WCDMA RX trouble

Check points

-Tranceiver connector soldering

-Duplexer connector soldering

-ASM switch connector soldering

-Other Rx RF Component (L/C) soldering

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Содержание FS501

Страница 1: ...FLY SERVICE SUPPORT FS501 Service Manual V1 0...

Страница 2: ...trouble 9 2 3 WCDMA RX trouble 11 2 4 GSM RX trouble 12 2 5 WiFi BT BT Part 14 3 Baseband section 7 3 1 Outline 16 3 2 Common Failure Analysis and Maintenance 17 3 2 1 Power failure Check 17 3 2 2 Aud...

Страница 3: ...is one of the important links among mobile products rear end producing The speed and quality of maintenance relate to the rate of good products production efficiency and cost control throughout the pr...

Страница 4: ...FLY SERVICE SUPPORT 1 3 Mainboard component distribution diagram Mainboard TOP...

Страница 5: ...FLY SERVICE SUPPORT Mainboard BOTTOM...

Страница 6: ...5PPM 1 8V 2 5x2x0 8mm NT2520SB ENG3216E Y801 10 Multilayer Chip Band Pass Filters 2 4GHz BF2012 L2R4 NBA T LF U808 11 SR3131 50 QFN 5 5x7 040 RF 3G transceiver SR3131 U901 12 SAW FILTER FOR GSM900 Rx...

Страница 7: ...FLY SERVICE SUPPORT 2 1 WCDMA RF power trouble Check points PA connector soldering Duplexer connector soldering Other Tx RF Component soldering Wcdma Band I Wcdma Band VIII...

Страница 8: ...onnector soldering is ok Yes Check Dupolexer connector is ok No Resoldering No Resoldering Yes Check Other Tx RF components soldering is ok No Resoldering 2 2 GSM RF power trouble Check points Trancei...

Страница 9: ...FLY SERVICE SUPPORT...

Страница 10: ...FLY SERVICE SUPPORT 2 3 WCDMA RX trouble Check points Tranceiver connector soldering Duplexer connector soldering ASM switch connector soldering Other Rx RF Component L C soldering...

Страница 11: ...PPORT Start Check Traceiver connector soldering is ok Yes Check Duplexer connector is ok No Resoldering No Resoldering Yes Check Other ASM Switch soldering is ok No Resoldering Check Other components...

Страница 12: ...FLY SERVICE SUPPORT 2 4 GSM RX trouble Check points Tranceiver connector soldering ASM switch connector soldering Rx SAW filter connector soldering Other Rx RF Component L C soldering...

Страница 13: ...ICE SUPPORT Start Check Traceiver connector soldering is ok Yes Check ASM Switch is ok No Resoldering No Resoldering Yes Check Rx SAW filter soldering is ok No Resoldering Check Other components L C s...

Страница 14: ...FLY SERVICE SUPPORT 2 5 WiFi BT GPS Part 2 5 1 WIFI BT GPS Part...

Страница 15: ...e freq error if the power is too high or the freq too big EVM may also lead to excessive please re test 4 WIFI RX fail main receiving sensitivity fails to pass check whether U803 has solder skips Gene...

Страница 16: ...calibration parameters such as RF control correction value of an audio signal the IMEI number and other important information and store user settings data such as phone number CALL volume and tone LP...

Страница 17: ...down leakage current boot large current The main reason for the problem Weld electrical the original filtering or ESD device to short circuit burning with the device is connected to a power source Pos...

Страница 18: ...ne s speaker circuit is as follow Speaker Loop Speaker Common faults and reasons 1 SPK Ringtones reasons 1 light board SPK itself is bad or the connection FPC problem the whole observation board board...

Страница 19: ...thout sound 1 Receiver assembly adverse the shrapnel and board poor contact 2 Receive ontology bad 3 the volume settings or software problems 2 Receiver noise or volume 1 Receiver incoming material wh...

Страница 20: ...rd 3 5mm headphone Its circuit diagram is as follows Headphones common faults and reasons 1 headphones only one channel sound 1 the headset is not inserted in place 2 Relevant component Weld 3 Relevan...

Страница 21: ...ot recognize 1 Relevant component Weld 2 whether headphones Block shrapnel and motherboard good contact 3 software reasons 4 headset MIC no transmitter 1 the headset is not inserted in place 2 Relevan...

Страница 22: ...atic as shown below Common problems and causes of the LCD module 1 LCD screen is blank 1 LCD is not installed or and fixture poor contact 2 LCD backlight circuit is bad check backlight so that the foo...

Страница 23: ...Weld or even tin short circuit 3 software problems 3 LCD black spots bright spots black lines stripes Failure LCD ontology bad 3 2 4 FM The CPU controls FM IC working condition through the I2C signal...

Страница 24: ...t shrapnel contacts with the mainboard well 6 whether headphone socket welding is OK 3 FM module operation failed 1 Check whether the I2C and CLK signal are normal or not 2 Software fault 3 2 5 Camera...

Страница 25: ...Camera body has problems Back camera Front camera 3 2 6 SIM card failure FS501 SIM card module circuit is connected directly with PMIC through eight path signal from SUIM slot The major failure of th...

Страница 26: ...e itinerary or inserted upside SIM card circuit 3 2 7 Gravity Sensor FS501 G Sensor circuit is very simple Power offer power to the Sensor IC power I2C bus transfer command and data G Sensor faults an...

Страница 27: ...ding phenomenon Capacitance may on short circuit using a multimeter to test whether T card signal and ground and VMCH short circuit can eliminate 3 software reason 2 T card not to know card T holder P...

Страница 28: ...ss can cooperate with LCD and startup current as well as the keyboard and so on to orientate approximately 1 Power off leak current is large The main failure reason is VBAT connected components had gn...

Страница 29: ...boot LCD displays normally even can enter the IDIE interface single board is very hot 1 The individual power circuit short circuit to ground phenomenon exists in the phone which is usually the proble...

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