Setbox adaptor repair at home|adaptor repair|Repair charger

Описание: Setbox adaptor repair at home|12v adaptor repair| Repair setbox charger

मैं आपको Set-Top Box Adapter / Charger Repair at Home की पूरी गाइड दे देता हूँ, ताकि आप 12V DC adapter (setbox, router, CCTV, LED light आदि के लिए) घर पर repair कर सकें।


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1. Adapter के Types

अधिकतर setbox adapters SMPS (Switch Mode Power Supply) type होते हैं, जो AC 220V को DC 12V में बदलते हैं।


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2. Common Faults & Causes

Fault Possible Cause

No Output (0V) Fuse blown, rectifier diode short, switching transistor short
Low Voltage Output Weak capacitor, diode leakage
Output Fluctuation Bad solder joints, capacitor weak
Adapter heating Overload, short circuit
LED on but no power Output cable broken, connector loose



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3. Repair Process (SMPS Adapter)

A. प्राथमिक चेकिंग

1. Multimeter से output voltage check करें (12V आना चाहिए)।


2. Output cable continuity check करें।


3. अगर cable cut है तो नया solder करें।




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B. Adapter खोलकर चेक करें

1. Fuse check – continuity mode में।


2. Rectifier diodes test – diode mode में (short/open हो तो replace)।


3. Switching transistor / MOSFET check – short हो तो बदलें।


4. Filter capacitors check – bulged या leaking हो तो replace करें।


5. Optocoupler + PWM IC चेक करें – faulty हो तो बदलें।


6. Bad solder joints re-solder करें।




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C. Testing

Repair के बाद test के लिए series bulb method इस्तेमाल करें, ताकि short circuit में adapter फिर से खराब न हो।



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4. Tools Needed

Multimeter

Soldering iron + solder wire

Screwdriver set

Replacement components (fuse, diode, capacitor, MOSFET)



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5. Safety Tips

Repair करते समय AC mains से adapter disconnect करें।

Primary side high voltage से सावधान रहें।

अगर SMPS repair में अनुभव नहीं है तो expert की मदद लें।



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