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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Bad or good Lamp lnverter board for NEC LCD1830 wanted.
Repairing this LCD unit with bad inverter board, just fixed the main
power supply with three capacitors, now working then find out inverter is also bad. The part p/n on the board is: ALPS UHP061104, two transformers are same, transformer markings is 0053 1516S Every inverter board I seen always had one bad HV transformer, shuts down in 1/2 of a second, see lamps lit up momentily every time power is applied. All I need is either bad to obtain good HV transformer or good board. Thanks & Cheers, Wizard |
#2
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Bad or good Lamp lnverter board for NEC LCD1830 wanted.
Are you sure it is a bad transformer ?
I never have had one with a bad transformer. It is usually the capacitor across the primary winding that becomes leaky and causes the inverter to shut down. I have had some with bad FET's that drive the transformer. I even substitued transistors in the TO-92 case for the SMD ones with good results. Have anice day... John |
#3
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Bad or good Lamp lnverter board for NEC LCD1830 wanted.
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