Re: Sharp LC52D62U
Sharp power supply RDERNCA184WJQZ
Anyone know the correct output voltage of this board to the inverters? This board is used in many 42" to 62" Sharp Aquos (2005 - 2010 era) TVs. Also known as ZEBRALC605-4001CC.
SOMEONE must have this data - help gratefully appreciated.
Thanks in advance.
Ron
rviani
Member
Last Activity: 02-09-2023, 02:35 PM
Joined: 12-21-2022
Location: Spring Lake
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Sharp LC52D62U Pwr Supply RDENCA184WJQZ
Anyone know the correct output voltage of this board to the inverters? This board is used in many 42" to 62" Sharp Aquos (2005 - 2010 era) TVs. Also known as ZEBRALC605-4001CC.
SOMEONE must have this data - help gratefully appreciated.
Thanks in advance.
Ron -
Re: Sharp LC52D62U
Update: Still stumped as to what the is the problem. Does anyone have a schematic for the RDENCA184WJQZ power supply board or know where to get one? The only problem I can find is the output voltage to the inverters is 47.3 volts (even with the inverters disconnected) where the service manual calls for 24V. Am considering to buy a new power supply board. Any help appreciated.Leave a comment:
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Re: Sharp LC52D62U
Correct it had no effect - but is it useful to change these? - any idea what the rating is ?Leave a comment:
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Re: Sharp LC52D62U
Additional info. Heating ceramics ( a bit more difficult due to location on the board) did not seem to make a difference. Also ceramics seem to be unmarked - any idea what rating they are?Leave a comment:
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Re: Sharp LC52D62U
Changed all 16 electrolytics on all 4 inverter boards. Result is that I now get rapidly flashing CCFLs when power on.
Doing reset procedures with channel and volume buttons does not cause any change. LCD display panel is currently removed but I don't think this causes the problem. Assume if inverters were working I would get CCFLs on constantly. Is the next step to change the blue ceramic caps?
Once again all help appreciated.Leave a comment:
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Re: Sharp LC52D62U
Will give it a try and post results .
THANKS MUCH !!!Leave a comment:
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Re: Sharp LC52D62U
Update: Heating the electrolytic capacitors on the inverter boards worked ! This resulted in all the CCFLs flashing rapidly - the first time I have gotten any light at all. Assume the flashing may be due to having the LCD paned disconnected at this time? Assume I should change all the electrolytics on all four boards ? Input voltage from power supply board to inverters still reading 48V whether connected to inverters or not - service manual seems to indicate this should be 24V so not sure what is going on.
Once again suggestions appreciated.Leave a comment:
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Re: Sharp LC52D62U
Thanks for all suggestions - will try all these and post results tomorrow.
REALLY APPRECIATE THE HELPLeave a comment:
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Re: Sharp LC52D62U
Update: all CCFL test ok. Why is power to inverters @48V -bad power supply ? Help appreciated.Leave a comment:
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Sharp LC52D62U
After many years of service this unit now refuses to turn on and gives a once per second continuous blinking power indicator. Service manual indicates this is a "lamp failure".
If I force the power on with Channel down and volume up buttons I measure correct power supply voltages at the main board. The Power supply to the inverters (connector LA) measure 10V and 47.3V which I don't have a value for from the manual but appears should be 24V. LB connector which I guess are control voltages to inverter measure 3.3V, 3.1V, 0V, and 0V at contacts 1, 2, 3, and 4 respectivly.... -
Re: New Members - please post your introductions here
hello to all
Retired engineer joining in the hopes of getting some help on various electronic repairs and projects. Will post some specifics soonLeave a comment:
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