PC speakers music, movies और online content के लिए बनाए जाते हैं—not just system beeps. ये amplifier, power supply और speaker drivers से मिलकर बने होते हैं।
1. Types of PC Speakers for Songs
| Type | Description | Examples | Use |
| 2.0 Channel | 2 speakers (L + R), stereo sound | Logitech Z120, Creative Pebble | Music, YouTube, classes |
| 2.1 Channel | 2 speakers + 1 subwoofer | F&D A140X, Logitech Z313 | Songs, movies, light gaming |
| 5.1 / 7.1 Surround | Multiple speakers + subwoofer | Sony, JBL, Creative 5.1 | Home theater, gaming |
| USB/Bluetooth | Compact, portable | JBL Go, Logitech Z50 | Travel, wireless use |
2. How to Connect PC Speakers
- Green 3.5mm Jack → Desktop/Laptop audio out
- USB-Powered Speakers → USB for power + 3.5mm for audio
- Bluetooth Speakers → Windows Bluetooth settings से pair करें
- Avoid POST Speaker → सिर्फ beep के लिए होता है, music के लिए नहीं
3. Common Parts of PC Speakers
- Speaker Drivers – Electrical signal को sound में convert करते हैं → Satellites: 2–3″, Subwoofer: 4–8″
- Amplifier Board – Audio signal को boost करता है → ICs: TDA2030, TDA7297, LA4440
- Power Supply – SMPS या transformer-based → Converts 220V AC → 12V/18V DC
- Volume/Tone Control – Potentiometers या ICs से control होता है
- Input/Output Ports – 3.5mm jack, RCA, USB, Bluetooth module
4. Tools Needed for Repair
- Multimeter
- Soldering iron + wire
- Screwdrivers
- ESR meter (capacitor test)
- Optional: Audio signal tester
5. Common Faults & Repairs
| Problem | Cause | Solution |
| No power | Blown fuse, faulty power supply | Fuse check करें, components replace करें |
| Low/distorted sound | Weak output IC, bad capacitors | IC replace करें, capacitors check करें |
| Humming/Buzzing | Bad filter capacitors | Electrolytic capacitors replace करें |
| One speaker dead | Wire break या coil open | Wire re-solder करें या driver replace करें |
| Bluetooth not connecting | Faulty module | Module replace करें, 5V supply check करें |
| Intermittent sound | Loose connection | PCB joints re-solder करें |
6. Step-by-Step Repair Process
Visual Inspection
- Burn marks, loose wires, bulged capacitors चेक करें
- Power fuse सबसे पहले check करें
Power Supply Check
- SMPS/transformer output voltage measure करें
- Amplifier IC के voltage से match होना चाहिए (e.g., 12V/18V DC)
Speaker Driver Check
- Coil resistance multimeter से measure करें → 4Ω–8Ω = OK → Infinite = coil open → Replace
Amplifier Board Check
- ICs: TDA2030, TDA7297, LA4440
- Output pin पर DC voltage ~0V होना चाहिए → High DC = IC short → Replace IC
Capacitor Replacement
- Bulged या high ESR capacitors sound distortion करते हैं
- Same या higher voltage rating वाले capacitors लगाएं
Final Test & Reassembly
- Power ON करें, low volume पर music play करें
- Distortion या hum नहीं होना चाहिए
7. Safety Tips
- AC unplug करें repair से पहले
- First power-on के लिए series bulb tester use करें