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Hello viewers, this is a simple basic electronics circuit, 90% failed to ans, only 10% won AFS Dvd, if you can't solve basic electronic & how will you learn advanced knowledge...
💥 Even many institutes in INDIA failed to give this basic ans..
💥 You can't use transistor, but you can use JFET & components..
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*Case study*
LENOVO B460
(09922-1)
Problem- DEAD
➡️DC READING 0.300-.320
👉STANDBY IC TPS51123 Is Heating
👉 check impedance of All Pins 👍
🤔🤔
👉Ic Replace With *Tps51125*
👉 👍 DC READING 0.011 Board Ready
👉Turn On Board Display Come At 1.095 Amp💥
2nd problem
👉after 40-50 second Dc READING reverse and Stuck At 0.137
👉 Standby IC heating
👉 i think ic faulty i replace it
👉 Again Same Display Come after 40-50seconds dc reading reverse and ic heating
👉 Then i replace all MOSFET and Capacitors in standby section
👉 But Same😅
👉🤔🤔
👉 Understand DC Reading💥🔥it going To S5 to S0 then s0 state Something Short
Then i started Reverse
👉Start From USB
In Onboard 5V_USB1_s0 Ok
👉But 5V_USB2_s0 is Showing 0.68v
💥 *TC9 Titanium Capacitor Of USB is Short* 💥 Remove It
💥 Case Done😄😄😄💥
More than 2 Hours laptop is Working Fine
👉💥Thanks *AFS DVD* 🥰
*Md.Rafi Sir* *AFS Solutions*
*Practical Workshop is Improving My knowledge and Skills Thank you Very Much Sir Love You*