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Q4202
A)
Technical Specifications:
Particular
Key Matrix For Flashing
Chipset
Android Version
Frequency
Network Mode
Rom
RAM
Internal SD Card memory
Expandable Memory
Factory mode code
Good Earpiece volume
Good Loudspeaker volume
Good MIC volume
Good Vibrator volume
Remarks
LSK
MSM8909
Android 6.0
1.1GHz
2G/GSM：B 2\3\5\8
3G/WCDMA ：B 1\8
4G/FDD：B3\5\40
8GB
1GB
MB can support up 32GB T card
MB can support up 32GB T card
*#86428#
32 Ω±15%
8Ω±15%
2 Ω±15%
58Ω
L2 Service Manual
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Summary of Contents for Micromax Q4202
- Page 1 Q4202 L2 Service Manual Technical Specifications: Particular Remarks Key Matrix For Flashing Chipset MSM8909 Android Version Android 6.0 Frequency 1.1GHz 2G/GSM：B 2\3\5\8 3G/WCDMA ：B 1\8 Network Mode 4G/FDD：B3\5\40 Internal SD Card memory MB can support up 32GB T card Expandable Memory...
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Page 2: Service Details
Q4202 L2 Service Manual Engineering Code B) CAUTIONS Flashing & Servicing must be undertaken by qualified personnel only. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn. III. Use only approved Tools & components as specified in the parts list. - Page 3 Q4202 L2 Service Manual Description Reason Solution NO Power On Software issue Update Software Battery capacity level is too low Charging the Battery Power On Key is fail Change Key Main PCBA issue Refer to the L3 maintenance manuals or...
- Page 4 Q4202 L2 Service Manual 3：Proximity Sensor not working Description Reason Solution Proximity Software issue Download software sensor Sensor holder is not assembled well Re-assemble the sensor holder PCBA fail Change PCBA/Refer to L3 repair P- sensor Inspect the sensor. If it is broken, change with a new one.
- Page 5 Q4202 L2 Service Manual Key is not work Key fail Change Key Key is not assembled well Re-assemble PCBA issue Change PCBA/Refer to L3 repair Side Key FPC Side Key FPC soldering 6：Charging issue Description Reason Solution Cannot charge Adapter fail...
- Page 6 Q4202 L2 Service Manual FPC fail or FPC Change FPC or FPC connect connect fail Main PCBA issue Change main PCBA/Refer to L3 repair USB connector Battery connector 8：Front Camera not working Description Reason Solution Colored screen when open Camera issue...
- Page 7 Q4202 L2 Service Manual Rear camera connector 10：Error Playing Video Description Reason Solution Flash Light Software issue Update Software Flash light fail Change flash light PCBA fail Change PCBA/Refer to L3 repair Flash Light Flash Light drive IC 11：Vibrator not working...
- Page 8 Q4202 L2 Service Manual Main FPC connect fail Change Main FPC connect Moto issue Change Moto Main FPC fail Change Main FPC Main PCBA issue Change main PCBA/Refer to L3 repair Vibrator soldering Main FPC connect 12：WiFi/BT /GPS not working...
- Page 9 Q4202 L2 Service Manual searchable Software issue Update software 34G antenna is fail Change 4G antenna RF cable connect issue Reassemble the RF cable connect RF Cable fail Change RF Cable SUB PCBA issue Change SUB PCBA PCBA fail Change PCBA/Refer to L3 repair...
- Page 10 Q4202 L2 Service Manual Description Reason Solution Receiver The volume to shut down Press V +, transferred to the suitable volume Dust with receiver Clean receiver Receiver issue Change receiver Volume key issue Change volume key PCBA issue Change PCBA/Refer to L3 repair Receiver connector 16：Earphone not working...
- Page 11 Q4202 L2 Service Manual Moto issue Change SUB Main FPC fail Change Main FPC Main PCBA issue Change main PCBA/Refer to L3 repair Main FPC connect 18: Speaker not working Description Reason Solution Noise/Crack Speaker with dust Clean speaker Assemble issue...
- Page 12 Q4202 L2 Service Manual Main FPC fail Change main FPC Sub PCBA issue Change sub PCBA Main PCBA fail Change main PCBA/Refer to L3 repair Speaker connect Inspect the touching point. If it is broken or deformed, change a new one.
- Page 13 Q4202 L2 Service Manual Main PCBA fail Change main PCBA/Refer to L3 repair Thanks For any Query or suggestion, Please write to tech.help@micromaxinfo.com...