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X377
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
Engineering Code
L3 Service Manual
Remarks
N/A
SC6531E
NA
900/1800mHz
GSM
32Mbit
32Mbit
NA
Support up 16 GB T card
*#2020#
97Hz
89.5dB
-42db
170Hz
*#346#
1
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Table of Contents
Related Manuals for Micromax X377
Summary of Contents for Micromax X377
- Page 1 X377 L3 Service Manual A) Technical Specifications: Particular Remarks Key Matrix For Flashing Chipset SC6531E Android Version Frequency 900/1800mHz Network Mode 32Mbit 32Mbit Internal SD Card memory Expandable Memory Support up 16 GB T card Factory mode code *#2020# Good Earpiece volume...
- Page 2 X377 L3 Service Manual...
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Page 3: Table Of Contents
X377 L3 Service Manual MENU 目录 1 Main board explored overview......................3 2.1 Can’t download...........................5 2.2 Can’t power on ........................... 6 2.3 Can’t getting charged......................... 7 2.4 LCD Display fail............................8 2.5 Camera is not working........................9 2.6 RECEIVER is not working........................10 2.7 SPEAKER is not working........................ -
Page 4: Main Board Explored Overview
X377 L3 Service Manual 1 Main board explored overview Figure --top Power key... - Page 5 X377 L3 Service Manual TORCH 1 TORCH 2 SPEAKER VIBRATOR SIM2 SIM1 T/F SLOT Charger MOSFET RF PA Battery connector 26MHz Crystal BT Antenna Figure—bottom 3.5 Phone Antenna Antenna JACK...
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Page 6: Can't Download
X377 L3 Service Manual 2.1 Can’t download It might be the poor soldering of IO Connector, please check the soldering quality of IO Connector first, and then check the related diagram. Solution： 1. Use a fresh data cable. 2. Check the I/O connector and its soldering quality, and then check the volume ofJ0802. -
Page 7: Can't Power On
X377 L3 Service Manual 2.2 Can’t power on Solution： 1. Check resistor R0999 from net PWRKEY to net PBINT is correct ornot. 2. Power on the handset with DC to verify its current is correct or not, check the diagram of VBAT &VBUS is shorted or damaged. -
Page 8: Can't Getting Charged
X377 L3 Service Manual 2.3 Can’t getting charged Solution： 1. Use a fresh USB data cable or charger, re-solder the IO connector. 2. Check T0391 is poor soldering, shorted or damaged. 3. Check Mid PIN of battery connector is poor soldering or not ,check the related component is shorted ,broken or not (J0392 might be broken, T0398might be shorted). -
Page 9: Lcd Display Fail
X377 L3 Service Manual 2.4 LCD Display fail Solution： 1. Re-Solder the LCD or change it. 2. Re-Solder the CPU (U0100)or change Figure – LCD circuit... -
Page 10: Camera Is Not Working
X377 L3 Service Manual 2.5 Camera is not working Solution： 1. Re-Solder the camera or change it. 2. Re-Solder the CPU(U0100)or change it. Figure – Camera circuit... -
Page 11: Receiver Is Not Working
X377 L3 Service Manual 2.6 RECEIVER is not working Solution： 1. Assembly the receiver or change it. 2. Check the receiver circuit verify it is shorted with grounding or not(B0547/B0548/B0557/B0558/R0557/R0558/C0547/C0548/C0549/). 3. Re-Solder the CPU U0100 or change it. Figure--Receiver circuit... -
Page 12: Speaker Is Not Working
X377 L3 Service Manual 2.7 SPEAKER is not working Solution： 1. Assembly the speaker or change it. 2. Check the speaker circuit verify it is shorted with grounding or not(B0547/B0548/C0541/C0542/C0547/C0548/C0549). 3. Re-Solder the CPU U0100 or change it. Figure -- Speaker circuit... -
Page 13: Micphone Is Not Working
X377 L3 Service Manual 2.8 MICPHONE is not working Solution： 1. Assembly the micphone or change it. 2. Check the micphone circuit soldering quality (R0501/R0502/R0503/R0504/R0505/C0500/C0501/C0502/C0503/C0504/C0507/C0508/C0509/ B0501/B0502/B0507/B0508). 3. Re-Solder the CPU U0100 or change it. Figure -- Micphone circuit... -
Page 14: Vibrator Is Not Working
X377 L3 Service Manual 2.9 VIBRATOR is not working Solution： 1. Assembly the vibrator or change it. 2. Check the vibrator circuit soldering quality (D0531/C0531). 3. Re-Solder the CPU U0100 or change it. Figure – Vibrator circuit... -
Page 15: Fm Is Not Working
X377 L3 Service Manual 2.10 FM is not working Solution： 1. Check phone jack (J0881). 2. Check the FM circuit (built-in) soldering quality (R0137/C0137/L0137/R0138/R0881/L0881/T0881). 3. Re-Solder the CPU U0100 or change it. Figure -- FM circuit (built-in) -
Page 16: Can't Detect The Sim Card
X377 L3 Service Manual 2.11 BT Solution： 1. Check BT antenna connection. 2. Check the BT circuit soldering quality (R0134/C0134/L0134/R1130/R1139/L1139/L1138). 3. Re-Solder the CPU U0100 or change it. Figure -- BT circuit 2.12 Can’t detect the SIM CARD Solution： 1. Check the connection of SIM card or change a fresh SIM card to verify it. -
Page 17: Can't Detect The Tf Card
X377 L3 Service Manual Figure – SIM Card circuit 2.13 Can’t detect the TF CARD Solution： 1. Check the connection of TF card or change a fresh TF card to verify it. 2. Check the soldering quality of TF slot (J0851). -
Page 18: Rf Module
X377 L3 Service Manual 2.14 RF Module Solution： 1. Flash the SW. 2. Check the GSM antenna connection. 3. If there was no signal, then re-solder or change the RF PA(U0601). 4. Re-solder the CPU (U0100) or change it... - Page 19 X377 L3 Service Manual Figure -- RF Front-end Module...