Mains filter 68uf/400v is getting burst after 5 seconds when the monitor is powered ON.
Hout- BUH1015H removed , 4 Diodes ( Bridge Rectifier ) , 1N5399 changed new, Cap 68uf/450 V changed new and tested still same condition i.e. Filter CAp getting burst, Please help me in solving this problem.
Thanx & regards,
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sounds like your monitor has bad capacitors. When a monitor begins to overheat the capacitors may begin to burst or leak which will not do its job to hold electrical current sufficiently and cause the display to become blank.
4Monitor ID - Bit 2
11Monitor ID - Bit 1
12Monitor ID - Bit 0
1.First U can check any physical damage in power supply (220/400v)Main capacitor,
2.And also check LOT It's OK Than Remove H O/p Transister, check SMPS output voltages ,voltages are currect That means SMPS is OK.Check Boosting FET IRF630(Q402)Change it New One,and also change the IC604 7805 Regulator.
Finally change LOT.
check any dry points (SMPS&Hori.)
This monitor is know for a lot of parts that go bad, luckily they are usually the same ones.
If you are a technician or know one who can help you. Below is a list of part to repair/replace once the case is opened. (dont try this if your unfamilier with working on electronics.
1) F601= 2A Fuse 2) C605= 68uf 400v (must change) 3) R615= 0.68ohm 1watt 4) Q601= SSS6N60A 5) R613= 1Kohm 1/8watt (value changed to 2.3Kohm or higher) 6) R623= 4.7ohm 1/8watt (value changed to 7.2ohm or higher) 7) D604= 1N4148 8) IC601=UC3842B 9) C707 & C703= 1000uF 16V (must change, because of bad ESR value) secondary filter capacitor.
This problem of dell e151fp lcd monitor, you just need to resolder the inverter section (bad points or dry joint) and also check the capacitor value with ESR meter. It will solve your problems.