Forwarded from AJAY
🩸🩸CASE STUDY🩸🩸🩸 ..................................................................
💥💥AJAY—>AFS —>FAMILY —>MEMBER💥💥
🌲🌲🌲TARGET 83/100🌲🌲🌲.............................................................................................................................. ..................................................................................................................................................................................................................................................... ❤️DEDICATED TO RAFI SIR FOR TEACHER'S DAY SPECIAL❤️ 💥💥💥::::::You have always been an excellent educator who knew exactly how to illuminate a soul with its own light. Happy Teachers' Day to my teacher!::::💥💥💥 ............................................................................................................................................................................................................................................................................................................................................................................................................... ❤️LAOPTOP ::::::SONY
❤️MOTHERBOARD::::HK1
❤️PROBLEM :::::STAND BY IC BURNED..PRINT DAMAGED.
❤️FIRST REMOVED : IC AND 4 MOSFET'S.
❤️CHECKED: COIL AND LDO 5 IMPIDENCE.....::::GOOD:
❤️THEN DECIDED TO FIT BUCK MODULES...
❤️MAKED NOTE..........(19v....3V.....5V......5V LDO AND 15V FOR DC DC..)
❤️THESE ARE THE REQUIREMENTS.
❤️USED DAMAGED PC SMPS WIRE FOR CONNECTION.
❤️USED JUMPER WIRE FOR.....LDO 5V.
❤️USED 10K RESISTOR CONNECTED TO 19V LINE FOR DC DC SWITCHING PURPOSE.
❤️USED DOUBLE SIDE STICKER FOR FITTING.
❤️SUCCESFULLY COMPLETED SURGERY......TRIGGERED.............DC AMPHERE 1.185.
❤️CHECKED 2HR........NO PROBLEM...
❤️""""TOTAL COAST 130/- BENEFIT HIGH'''''''
❤️❤️SIR'S GUIDANCE...TRANSPARENT MARKER AND A3 PRINTOUT HELPED ME TO SOLVE FASTLY....❤️❤️
💥💥AJAY—>AFS —>FAMILY —>MEMBER💥💥
🌲🌲🌲TARGET 83/100🌲🌲🌲.............................................................................................................................. ..................................................................................................................................................................................................................................................... ❤️DEDICATED TO RAFI SIR FOR TEACHER'S DAY SPECIAL❤️ 💥💥💥::::::You have always been an excellent educator who knew exactly how to illuminate a soul with its own light. Happy Teachers' Day to my teacher!::::💥💥💥 ............................................................................................................................................................................................................................................................................................................................................................................................................... ❤️LAOPTOP ::::::SONY
❤️MOTHERBOARD::::HK1
❤️PROBLEM :::::STAND BY IC BURNED..PRINT DAMAGED.
❤️FIRST REMOVED : IC AND 4 MOSFET'S.
❤️CHECKED: COIL AND LDO 5 IMPIDENCE.....::::GOOD:
❤️THEN DECIDED TO FIT BUCK MODULES...
❤️MAKED NOTE..........(19v....3V.....5V......5V LDO AND 15V FOR DC DC..)
❤️THESE ARE THE REQUIREMENTS.
❤️USED DAMAGED PC SMPS WIRE FOR CONNECTION.
❤️USED JUMPER WIRE FOR.....LDO 5V.
❤️USED 10K RESISTOR CONNECTED TO 19V LINE FOR DC DC SWITCHING PURPOSE.
❤️USED DOUBLE SIDE STICKER FOR FITTING.
❤️SUCCESFULLY COMPLETED SURGERY......TRIGGERED.............DC AMPHERE 1.185.
❤️CHECKED 2HR........NO PROBLEM...
❤️""""TOTAL COAST 130/- BENEFIT HIGH'''''''
❤️❤️SIR'S GUIDANCE...TRANSPARENT MARKER AND A3 PRINTOUT HELPED ME TO SOLVE FASTLY....❤️❤️
Watch "DELL 13269 live case study with students, can a teacher solve live case study online with students." on YouTube
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DELL 13269 live case study with students, can a teacher solve live case study online with students.
Dell Janus 13269, HINDI PRACTICAL DEMO, LEARN MORE TO EARN MORE ..
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Watch "DELL 13269 live case study with students, can a teacher solve live case study online with students." on YouTube https://youtu.be/c04Dc-S6mlU
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Forwarded from Srinivash Rao
Case study
Dell 3521 (LA-9104P)
Fault - sometime on, display comes then shutdown within 1 minute
and some time didn't on
*Clue* - dc reading sometime 0.005 and sometime 0.003
👉 Clean the board
👉 Vin ok, 3/5v ok
👉 Check 3/5v output by DSO, there is little disturbance
👉 Replace output capacitor, now clear but problem not solved
👉 Check on/off switch - 2.3v and sometime 2.9v
👉 check impedance on Dc-Dc mosfets, output ok but input very low with buzzer
👉 Check LDO voltage, 5v ok but 3.3v not proper
👉 Apply flux and just resold all pins
💥 Boom
Problem solved
Display good and board continues on
Think simple and stupid 🙏🙏🙏
Dell 3521 (LA-9104P)
Fault - sometime on, display comes then shutdown within 1 minute
and some time didn't on
*Clue* - dc reading sometime 0.005 and sometime 0.003
👉 Clean the board
👉 Vin ok, 3/5v ok
👉 Check 3/5v output by DSO, there is little disturbance
👉 Replace output capacitor, now clear but problem not solved
👉 Check on/off switch - 2.3v and sometime 2.9v
👉 check impedance on Dc-Dc mosfets, output ok but input very low with buzzer
👉 Check LDO voltage, 5v ok but 3.3v not proper
👉 Apply flux and just resold all pins
💥 Boom
Problem solved
Display good and board continues on
Think simple and stupid 🙏🙏🙏