Blu Dash JR Service Manual Download | Manualshive

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BLU Dash JR

Service Manual

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Summary of Contents for Dash JR

Page 1: ...BLU Dash JR Service Manual ...

Page 2: ...a wrist strap when exchange system boards When repairs are made to a system board they should spread the floor with anti static mat which is also grounded Use a suitable grounded soldering iron Keep sensitive parts in these protective packages until these are used When returning system boards or parts like EEPROM to the factory use the protective packages as description ...

Page 3: ...ecause performance of parts is damaged by the influence of magnetic force Surely use a standard screwdriver when you disassemble this product otherwise screw will be worn away Use a thicken twisted wire when you measure level A thicken twisted wire has low resistance therefore error of measurement is few Repair after separate Test Pack and Set because for short danger for example an over current a...

Page 4: ...m that you don t keep this rules ESD Electro statically Sensitive Devices Precaution Several semiconductor may be damaged easily by static electricity Such parts are called by ESD Electrostatically Sensitive Devices for example IC BGA chip etc Read Precaution below You can prevent from ESD damage by static electricity Remove static electricity remained your body before you touch semiconductor or p...

Page 5: ...uct Because most of ESD are packed by box and aluminum plate to have conductive power they are prevented from static electricity You must maintain electric contact between ESD and place due to be set up until ESD is connected completely to the proper place or a circuit board Product Function Camera and camcorder Music player FM BT WIFI Dual Sim Card ...

Page 6: ...03 C1 ...

Page 7: ... ok or not Y Test the output of 32 768 crystal Y Check the wilding between U100 andU500 2 No ring Setting rightly and check spk Check All the individual components of SPK path Y Re welding or change U100 3 No Vibration Setting rightly and check MOT Check the voltage of MOT is close to 0 7V N Re welding or change U100 Change J801 or Re welding it Re welding or change U100 Change 26M crystal X0401 o...

Page 8: ... Y N Check All the individual components of MIC circuit Re welding it Y Re welding or change U100 5 Cannot power on Cannot power on Check if it can be power on after redownloading N N Check the power supply and the output of U100 Change U100 or Re welding it Y Test C446 to check the 26M clk is ok or not N Change 26M crystal X0401 or re welding U400 Y N Test the output of 32 768 crystal Change 32 7...

Page 9: ...ge or re welding U400 7 WIFI BT abnormal Wifi bt abnormal N Check All the individual components of wifi bt circuit Re welding it Y N Re welding or change U1003 then check wifi bt is normal change U100 or re welding it 8 ATV FM abnormal ATV FM abnormal N Check whether the ATV ANT has good contact Re assembly it Y N Take off camera moudle then check ATV again change camera moudle or re welding it or...

Page 10: ...SWUpgradeDownload ...

Page 11: ...Calibration ...

Page 12: ... USB conn TP conn Micro SD SIM CARD conn BBIC SC6820 RF PA 26M crystal RF transceiver GSM ANT EAR jack W IFI BT ANT FM IC WIFI BT shielding Charge MOS BATTERT CONN 3D G sensor Flash RAM 2D G sensor MOTOR SPEAKER ...

Page 13: ...Receiver Camera conn LCD conn Microphone ...

Page 14: ...J801 WIFI BT E1001 11 C1102 L1003 LIHI VDD18 01003 J702 RST GND r1o re o SDA INT 01203 m 2V8 SCL SIDEKEY GND VBAT SIM2 SIM1 2 J803 RIOIOR1M11 R834 n Cfi35 Rfi 35 U102 0613 X0401 T U407 ...

Page 15: ...4 0 0 0 L SENSOR RCV602 RZ V 1 J7 24 1 J1 1 TX D D 1H0 GNDVCHGVBAT 48 0 LCD 24 7631 MB VO 2 LCD J9 8 KEY FPC 1 J2 I 29 J706 CAMERA 1 A 1 ...

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