Odisha CHSE +2 Vocational Mobile Technology study plan

Sketch and label the block diagram of a smartphone from memory, naming the CPU/SoC, RAM, eMMC/UFS storage, PMIC, RF transceiver, antenna switch, display connector and charging circuit.

Identify the function of at least 15 named sections on a real handset PCB by tracing them with a multimeter in continuity mode.

Explain in writing how power rails are sequenced at boot and what the PMIC does when a short is detected on a secondary rail.

Describe the difference between a charging IC fault and a battery fault, listing the three measurements you would take to separate them.

Measure and record voltage, resistance and diode-mode readings at the battery connector, charging port and main power rail of a working handset, and store them as a personal reference sheet.

Diagnose three deliberately created no-boot conditions (dead battery, open charging fuse, disconnected display flex) and write the symptom-to-cause chain for each.

Demonstrate a structured intake test sequence: visual inspection, current draw on a DC supply, then rail-by-rail voltage check.

Explain how excessive current draw at power-on narrows a fault to a specific section of the board.

Compare 2G, 3G, 4G and 5G in a table covering modulation, typical bands used in India, channel bandwidth and achievable data rate.

Explain the roles of SIM, IMEI, IMSI, HLR/VLR and the authentication key in network registration, in your own words.

Describe how a handset behaves when it shows 'no service' but the SIM is good, and list the four network-side and four handset-side causes.

Distinguish Wi-Fi, Bluetooth, GPS and cellular radios by frequency range, antenna location on the board and the symptom each produces when its antenna path fails.

Assemble and label a personal toolkit containing an ESD wrist strap, temperature-controlled soldering station, hot air rework station, DC power supply with current limiting, digital multimeter, ultrasonic or isopropyl cleaning setup, and precision drivers.

Demonstrate correct use of a multimeter in voltage, resistance, continuity and diode modes on a live and a dead circuit.

Apply ESD-safe handling and lithium-ion battery safety rules, including storage voltage, puncture hazards and fire-safe charging practice.

Explain what each instrument is used for and what it must never be used for, including why a standard soldering iron tip should not be used for BGA rework.

Solder and desolder through-hole and 0402/0603 SMD resistors on practice boards until joints are shiny, concave and free of bridging on 10 consecutive attempts.

Perform hot-air removal and reflow of an IC without lifting pads, using correct nozzle size, airflow and preheat.

Replace a charging port and a display flex connector on a scrap board, then verify continuity of every pin to its destination.

Identify and correct five common defects: cold joint, solder bridge, tombstone, lifted pad and flux residue, and explain the cause of each.

Apply a written six-step diagnostic workflow (customer interview, visual check, power test, section isolation, component test, verification) to five different reported faults.

Diagnose and document faults in charging, display, audio, network and touch subsystems, naming the most likely component for each symptom.

Perform a software-side fault isolation: safe mode boot, cache wipe, factory reset and firmware reflash, and state when each is appropriate versus when it destroys evidence.

Explain the difference between a hardware and a software cause for the same symptom, using at least three concrete examples such as no-charge, no-boot and overheating.

Compare Android and iOS architecture at the level of kernel, runtime, app sandbox and update model, and explain what a technician can and cannot do on each.

Carry out a full service procedure on a device: back up data, record IMEI and condition, repair, test all functions against a checklist, clean, and return with a written job card.

Explain data privacy obligations when handling a customer's device, including what you must never access and how you record consent for data loss risk.

Draft a customer-facing explanation of a repair in plain language, including what was faulty, what was replaced, the warranty terms and the preventive advice.

Price three representative repairs by calculating parts cost, labour time, overhead and margin, and set a minimum bench charge.

Draft a simple business plan for a mobile service shop covering location, tools capital, service menu, warranty policy and record keeping.

Practise a customer complaint scenario: acknowledge, diagnose, quote, obtain approval and close, without promising an outcome you cannot guarantee.

Complete two timed mock papers across all eight domains and review every wrong answer to its underlying concept.