UPMSP Vocational Mobile Repairing study plan

Define voltage, current, resistance, and power, and compute each from the other two using Ohm's law and the power equation across at least 20 practice values.

Identify resistor colour bands and read 15 real resistors to their nominal value and tolerance without a reference chart.

Explain how a diode, capacitor, inductor, and transistor behave in a DC circuit, and state one mobile-phone use for each.

Trace the main power rails of a smartphone block diagram from battery to PMIC to SoC and name the component at each stage.

Label at least 15 hardware sections on a phone schematic-style diagram, including PMIC, CPU/SoC, eMMC/UFS, RF transceiver, PA, display connector, touch IC, camera connector, and charging IC.

Describe the boot sequence from power key press to OS load and list the three most likely failure points in that chain.

Apply a structured diagnostic routine (visual check, current draw, voltage measurement, substitution) to five written fault scenarios and record the reasoning for each step.

Distinguish symptoms caused by a shorted rail, an open line, and a faulty component by interpreting current-draw behaviour on a bench power supply.

Demonstrate correct use of at least eight tools, including hot air station, soldering iron, tweezers, suction cups, plastic pry tools, ultrasonic cleaner, multimeter, and bench power supply, stating the safe setting for each.

Disassemble and reassemble a practice handset three times without damaging a connector, flex cable, or screw thread.

Perform 20 practice solder joints on scrap boards and 10 hot-air reflow removals of a small IC, then inspect each under magnification.

Explain the temperature, flux, and dwell-time choices for lead-free rework and identify three signs of a cold or bridged joint.

Diagnose and repair at least three injected faults on a practice board, such as a lifted pad, a shorted capacitor, or a broken connector pin.

Replace a charging port and a display flex connector on practice boards and verify continuity to the relevant test points.

Use a multimeter in diode mode to find a shorted rail on a dead board and confirm the faulty component by removal.

Document each repair with before-and-after current-draw readings and a photograph-free written description of the fault.

Explain the difference between flashing, unlocking, and firmware repair, and list the risks of each to user data and to the device.

Install and use one vendor flashing tool in a practice environment, and flash a practice handset from stock firmware to a verified working state.

Describe the safe handling, storage, and disposal rules for lithium-ion cells and identify three signs of a swollen or failing battery.

Trace the charging path from USB port to charging IC to battery and explain how a faulty charging IC produces a no-charge symptom.

Name the cellular generations from 2G to 5G and state the frequency bands and typical use of each in the local market.

Explain what RSSI, RSRP, RSRQ, and SINR measure and read each value from a practice handset's field test or service menu.

Diagnose a no-signal fault by checking antenna contact, RF connector, PA, and transceiver in a logical order, and record the test at each stage.

Measure charging current and battery voltage under load with a USB power meter and bench supply, and judge whether the readings indicate a healthy charging circuit.

Set up an ESD-safe bench with a wrist strap, mat, and grounded iron, and verify continuity of the grounding path with a multimeter.

Write a shop procedure for receiving, tagging, and returning customer devices that records the reported fault and the device condition.

Draft a customer-facing explanation of a repair in plain language, covering the fault, the fix, the price, and the warranty, for three sample cases.

List the local rules for e-waste, battery disposal, and used-component handling, and state where each waste stream goes in your shop.

Complete a full timed mock exam covering all ten domains and score at least 80 percent overall.

Review every missed question, write the correct reasoning for each, and re-test those items after 48 hours.

Perform one end-to-end repair on a practice handset, from intake to diagnosis, rework, flashing, verification, and customer handover.

Recite the key formulas, safety rules, and diagnostic sequences from memory in a self-written one-page crib sheet.