Hena MM7619 Service Manual Download Page 12

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HENA DIGITAL TECHNOLOGY (SHEN ZHEN) CO. LTD.

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LCD no Display:

No touch: checked the U200, whether colder solder; then checked TP, whether damaged.

Measured LCD_VB voltage: the same as
battery voltage;

VCC_LCD: 24.8v

Checked the L710, D505 is damaged

Checked the LCM_RST: 2.8V;

3.3V_TROUT

: 3.3V;

IO28_PMU

: 2.8V

Summary of Contents for MM7619

Page 1: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 1 MM7619 Service Manual...

Page 2: ...TECHNOLOGY SHEN ZHEN CO LTD 2 Prepared Verified Approved Version V1 0 Date 2015 7 9 Product Spec Introduction 3 Exploded View 4 Disassembly 5 Assembly 6 System block diagram 8 Troubleshooting 10 Upgra...

Page 3: ...A7 up to 1 3GHz RAM 1GB DDR3 Internal 8GB Flash Removable Micro SDHC card slot Max 32GB OS Android 4 2 Panel 6 98 16 9 540 960 Touch screen G P Camera 2MP 5MP Video 1080P Wifi 802 11b g n Battery 3 7...

Page 4: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 4 Exploded View...

Page 5: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 5 Disassembly...

Page 6: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 6 Assembly...

Page 7: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 7...

Page 8: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 8 stem block diagram 1 1 Block diagram 1 2 Layout diagram...

Page 9: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 9...

Page 10: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 10 Troubleshooting 1 NO POWER ON Check the VPROC_PMU VSYS_PMU VIO18_PMU Upgraded the software checked the MTK8127 DDR3 solder VPROC_PMU...

Page 11: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 11 VSYS_PMU 1 2V VIO18_PMU voltage 1 8V...

Page 12: ...no Display 3 No touch checked the U200 whether colder solder then checked TP whether damaged Measured LCD_VB voltage the same as battery voltage VCC_LCD 24 8v Checked the L710 D505 is damaged Checked...

Page 13: ...t work Changed the WIFI antenna or changed the WIFI MODEL 5 No charger Checked U8 whether damaged Upgrading Guide 1 Install driver Shut down MID press the volume button then connect MID to PC then pre...

Page 14: ...HENA DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 14 Then choose the driver base your OS of PC 2 Update Software...

Page 15: ...A DIGITAL TECHNOLOGY SHEN ZHEN CO LTD 15 First you should confirm your MID have shut down Connect the computer automatically after upgrade We suggest connect the USB of PC that can supply bigger curre...