MODULE D2 – BASIC ELECTRONIC & HARD DISK PCB REPAIRING

D2.1-BASIC ELECTRONICS AND

• Basic electronics (types of circuit, types of current, multimeter used, testing)
• Electronics components working idea (resister, capacitor, diode, transistor, mosfet, switching section etc)
• Resistor (working idea, types, measure, low value, high value, identify in hdd pcb testing)
• Ceramic Capacitor (working idea, types, measure, identify in hdd pcb testing)
• Fuse/ coil (working idea, types, measure, identify in hdd pcb testing)
• Diode, TVS diode (working idea, types, measure, identify in hdd pcb testing)
• Transistor/ mosfet working idea, types, measure, identify in hdd pcb testing)
• PCB repair tools demo (testing identify, soldering and d-soldering components)
• Common problem in hard disk due to printed circuit board fault

D2.2-HDD PCB REPAIRING CONCEPT

• Introduction to HARD DISK PCB, block diagram section of hard disk, Power Connection
• Different power required in pcb
• Power & protection section (TVS diode, fuse, coil , 0ohms transistor, Mosfet, other smd component working and power detail in hard disk)
• DC to DC converter (switching section, linear section, 1.5, 2.5, 3.3v supply)
• MCU section, Data section (chip working concept power main signals)
• Buffer Ram, flash ROM section (working concept types and main signals)
• VCM Motor controller & read channel chip (working concept and main signals)
• Head , Voice coil, pre amp section head
• Live PCB tracing (different volt of pcb, fault finding of hard disk pcb Online offline)
• Identify problem (shorting, open pcb, motor not get power, switching section not work)
• Identify hard disk pcb no for donor pcb (matching criteria Samsung, Seagate, wd, Hitachi, Ibm, Maxtor)
• Points to Notes when replacing PCB from patient to donour
• Replacing component and IC`s of hard disk (demo video) (understand different hard disk pcb, circuit troubleshooting chart)
• Websites Links for purchasing donour pcb