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Re: Sharp AQUOS tv model LC-60LE633U
Budwich, good point! It will only take a few minutes to make this check before proceeding. Thanks.
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Re: Sharp AQUOS tv model LC-60LE633U
R_J, thanks for the suggestion. I will replace LDO and then check operation. Any idea on how much thermal grease/paste to use between heat sink and LDO device? I understand grease or paste is not so much for insulation but to eliminate air spaces that would decrease efficiency of heat dissipation...is this correct? Thanks
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Re: Sharp AQUOS tv model LC-60LE633U
Budm, you are spot on. The device is a LDO with 4 leads. Lead 1 voltage in, lead 2 voltage out, lead 3 Gnd, and lead 4 Control. I have the 13 volt input but not the correct output. I also read 2.72vdc on control lead. Your LC/LED Primer on these tv power supplies is outstanding. Where would I read the 24vdc on the power supply connector going to the Main Logic board? When I replace the LDO, this may cure the problem...I'll let you know. Thanks for the guidance.
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Re: Sharp AQUOS tv model LC-60LE633U
R_J, thanks for the suggestion. I have not disconnected the t-con board. Do I disconnect the ribbon cables or just the two small wiring cables coming from the Main Logic board? I will disconnect the t-con board when I hear back from you. Thanks again!!
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Sharp AQUOS tv model LC-60LE633U
Hi All! This my first posting. I have a dead Sharp AQUOS tv model LC-60LE633U. I get 2 long flashes followed by 5 short rapid flashes on the front power light. I checked power supply voltages for those I could access and saw the 12 volt dc supply measured 7.35 volts instead of 12vdc. I isolated the 12vdc supply pin from where it went to Main Logic board. The voltage was still 7.35vdc so I don't think Main board is draining missing voltage. I traced the 12vdc power from a Low Voltage Dropout Regulator (LVDR). I plan to replace the LVDR and go from there. The power supply initially supplies voltages...
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