LC

Lesson 8: Supporting Mobile Devices

Lesson 8: Supporting Mobile Devices

Laptop Displays & Technologies

  • LCD: Common, low power, cost-effective, but difficult to achieve true black.

    • Backlighting: Fluorescent, LED, and others, with LED being more common.

    • Types:

      • TN: Good for gaming, poor viewing angles.

      • IPS: Better color, ideal for graphics.

      • VA: Balanced performance.

  • OLED: Thin, lightweight, great color, used in tablets/smartphones.

Wireless Networks in Laptops: Antennas in displays for 802.11/Bluetooth. Reconnect during repairs. Webcams/Microphones: Located at the top of the display for video calls. Older Backlights: CCFL (more power-consuming); newer models use LED backlighting. Hybrid Devices: Include touchscreen, stylus input, and support multiple input methods.

Connecting Mobile Devices
Wired:

  • USB: Type A, Mini B, Micro B, USB-C.

  • Apple Lightning: 8-pin, reversible, fast charging.

  • DB-9: Legacy serial connection, now converted to USB.

Wireless:

  • NFC: For mobile payments and access control.

  • Bluetooth: Common for audio devices.

  • Wi-Fi Hotspot: Phones acting as hotspots.

Mobile Device Accessories

  • Touch Pen/Capacitive Stylus: For precise input.

  • Active Stylus: Detects pressure, specific to devices (e.g., Apple Pencil).

  • External Drawing Pad: Adds touchscreen to non-touch devices.

  • Trackpads: Built-in or external via Bluetooth.

  • Audio Devices: Wired/Bluetooth headsets, external speakers.

  • Cameras/Webcams: Used for video calls.

  • Docking Stations: Simplify connection to peripherals.

  • Port Replicators: USB-based, quick connections.

Cellular Standards

  • 2G: GSM (global) & CDMA (US-specific).

  • 3G: Improved data speeds (megabits per second).

  • LTE (4G): Faster speeds (up to 300 Mbps).

  • 5G: High-speed (10 Gbps) for IoT.

  • Mobile Hotspot: Phones can provide Wi-Fi; check for charges.

Mobile Device Connectivity

  • Bluetooth Pairing: Requires PIN for device security.

  • GPS Navigation: Uses satellites for location, enhanced with Wi-Fi/cell towers.

  • Mobile Device Management (MDM): Manages security, device configurations, and data syncing.

Mobile Device Configurations

  • Initial Setup: Basic settings, email setup may require cloud services.

  • iCloud: Syncs data across Apple devices.

  • Data Transfer: Control cellular/Wi-Fi usage.

  • Backup/Recovery: Restore data through cloud services.

Laptop Hardware

  • Troubleshooting: Repair challenges vary by manufacturer.

  • Components: Batteries, keyboards (replaceable), and memory (SO-DIMM).

  • Storage: SSDs offer faster performance; M.2 for smaller drives.

  • Wireless: Integrated in new laptops; upgradeable in older ones.

  • Authentication: Biometrics (face/fingerprint) and NFC for secure access.