SMPS Have Low Output Voltage, How To Repair Switch Mode Power Supply SMPS When Low OutPut Voltage. in this video i uc3842 based flyback Switch Mode Power Supply SMPS. its rated output voltage were 12 Volt and 5 volt but after failure, its 12 volt section dropped to 3 volt and 5 volt output dropped to 0.7 volt. i checked input voltage, dc rail bulk capacitor, RCD snubber and finally i found 4x output dc capacitors were internally open. after replacing the capacitors the supply started to provide its nominal output voltage. after watching this video you can capable to:-
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if SMPS have fluctuating output or output voltage unregulated
if smps have short circuit in output
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Why SMPS Have Low Output Voltage - SMPS Output Less Than Rated Output Explained. there are many reasons for low output.
1. rcd snubber
2. mosfet
3. mosfet gate drive components
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How To Repair SMPS Switch Mode Power Supply and explained Step by Step Practical Troubleshooting. in this tutorial i explained the possible troubleshooting and fault finding techniques to find the faults in any switching mode power supply.
i shared my easiest and perfect troubleshooting techniques practical troubleshooting. smps concept and troubleshooting repairing or understanding repair switching mode power supply basics and working principle. also i discussed smps basics. after watching this video you can capable to:-
1 basic working concept of smps switch mode power supply
2. how PWM pulse width modulator work
3. block diagram of smps switch mode power supply
4. practical circuit tracing of smps
5 how to repair mobile charger
6 how to repair power supply of digital satellite receiver
7. how to repair led lcd tv power supplies
8. different faults in stages of smps
9. what is filter and protection circuit in SMPS
10 what is bridge rectifier circuit and how bridge rectifier circuit work
11 what is PWM pulse width modulator circuit and how to check it
12 function of FET, MOSFET, BJT, IGBT or switching modules
13 what is optocoupler or opto-isolator and what is its function in feedback circuit
14 what is voltage regulation and how it workks in SMPS
15 how to find problem if switch mode power supply have no output
16 what is problem when power supply have fluctuation and output is not regulated
17 current sense in smps
18 short circuit protection
19 how to test troubleshoot and repair smps switch mode power supply and easy test points in fault finding
and much more
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fuse keeps blowing
how to repair switch mode power supply when short circuit at input, fuse keeps blowing.
if SMPS is dead or no ouput. smps ic have no switching frequency,
if SMPS have fluctuating output or output voltage unregulated
if smps have short circuit in output
how to troubleshoot PWM SMPS controller when there is no switching from MOSFET
if SMPS have a whistle sound or excessive noise or excessive heat
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SMPS practical tutorial [ Ссылка ]
SMPS tutorial and practical troubleshooting and fault finding [ Ссылка ]
SAMSUNG BN44-0029a-00438 circuit diagram
[ Ссылка ]
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