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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💥 World's FIRST & one of the best, LAPTOP CHIPLEVEL REPAIR DVD'S.
💥How to read Schematics, All brands Bios edit, uma conversion, & MANY secrets available…
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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 🙏🙏🙏
Forwarded from Prince LDH
💥Case Study hp laptop, part number LA-C811P comes with in dead and liquid damage.
💥I open laptop find rust and & corrosion near core ic and charger ic.
💥Clean full motherboard and check any shorting. All good
💥Plug dc reeding goes to 0.0011 press power button laptop turn on and give display.
💥again i plug dc same reeding at that same time I connect battery also now reeding goes 11, 15, 0.007 back 11
💥for testing purpose I connect only battery and turn on laptop, laptop was turn on and give display now I connected dc now reeding 0.000. Removed battery also same. First fet not switch.
💥 first mosfet 0v on gate, remove discharging most same condition replaced first mosfet still same now i check charger ic requirement.
💥first vin for charger i have 3.48V back trace it found one resistor PRB6 10 ohm, one side 20v other side 3.48v check value showing value in Kilo ohm. I replaced that’s resistor now reeding back to 0.0011.
💥 Now i put back first mosfet laptop working fine and i put new discharging mosfet PQB13. Now connected battery and charger at same time and now battery also charging and laptop work fine.
💥💥💥Thanks to md Rafi Sir gives us 30 millisecond Technology💥💥💥
💥I open laptop find rust and & corrosion near core ic and charger ic.
💥Clean full motherboard and check any shorting. All good
💥Plug dc reeding goes to 0.0011 press power button laptop turn on and give display.
💥again i plug dc same reeding at that same time I connect battery also now reeding goes 11, 15, 0.007 back 11
💥for testing purpose I connect only battery and turn on laptop, laptop was turn on and give display now I connected dc now reeding 0.000. Removed battery also same. First fet not switch.
💥 first mosfet 0v on gate, remove discharging most same condition replaced first mosfet still same now i check charger ic requirement.
💥first vin for charger i have 3.48V back trace it found one resistor PRB6 10 ohm, one side 20v other side 3.48v check value showing value in Kilo ohm. I replaced that’s resistor now reeding back to 0.0011.
💥 Now i put back first mosfet laptop working fine and i put new discharging mosfet PQB13. Now connected battery and charger at same time and now battery also charging and laptop work fine.
💥💥💥Thanks to md Rafi Sir gives us 30 millisecond Technology💥💥💥
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