Re: LG 42ld520 Main Board issues
Will do
Smoothjazz
Member
Last Activity: 03-09-2018, 05:31 PM
Joined: 02-20-2017
Location: Columbus,Ohio
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LG 42ld520 Main Board issues
Been troubleshooting this LG tv set this morning.I get the LG startup screen..with no clock.. the screen suddenly goes away with only the back light
lit up.Took DC voltages on the main power supply board which has the connection going to the main board and I am missing a couple 20VDC readings which
is suppose to be on certain pins coming from the power supply board. Has anyone came across schematics for these power supply boards to try to troubleshoot
voltages? The board has markings on what voltages are suppose to be at certain points.Last edited by Smoothjazz; 01-13-2018, 09:36 AM. -
Re: Samsung PN42C450B1D
Freakaftr8,
Will try that troubleshooting tip and get back with ya on what I find out.
Hopefully this will give me a answer.Leave a comment:
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Re: Samsung PN42C450B1D
Good morning,
I checked my VS and VA Voltages upon startup, and yes they are there , then they slowly drop off to 0 volts.Leave a comment:
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Re: Samsung PN42C450B1D
Will check in the morning and post a reply.Leave a comment:
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Re: Samsung PN42C450B1D
Hi,
Took the readings after I had pushed the power on button.Leave a comment:
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Samsung PN42C450B1D
Hello everyone,
I am a newbie to this forumn trying to figure out the issue with my plasma tv. Okay..here we go..tv set has the constant clicking when trying to power on.
I have disconnected both x and y boards, and tv set still wont power up.I took readings at CN 801 and CN802...voltages are correct.Took readings at my VS and VA test points and voltages are nill to none.( suppose to have 50 for one and 210 for another). Am I looking at a bad SMPS board? -
Re: Yamaha RX A-1030
Since the unit is in protect mode, how can I test dc voltage when the unit wont stay on long
enough for me to get readings on transistors, diodes, resistors? Am I missing something here?Last edited by Smoothjazz; 02-21-2017, 05:11 AM.Leave a comment:
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Re: Yamaha RX A-1030
Thank you very much!!Leave a comment:
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Yamaha RX A-1030
Hello,
I am starting to troubleshoot a power supply board for this Yamaha RX A-1030
receiver.I have pulled out a diode RB215T.I looked it up and its called a
Shotky Barrier Diode. Can someone explain to me how this 3 legged diode
works and what would good readings be? -
Re: Yamaha RX A-1030
Cool..thanks !!Leave a comment:
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Yamaha RX A-1030
Hello everyone,
I am a newbie to this forum.I have a Yamaha HTR that is in protect mode
( figure that).I am getting the DS1 message having bypassed the protection
mode state.Since the unit wont power up, is there a way to isolate the bad
amp board ( opened up unit and I see 2 large heatsinks holding 8 transistors)
One on the left, one on the right.Trying to elimate having to test all 16
transistors in this unit. I looked inside and I really cant tell if there is a way
to disconnect the amp boards from the power supply board. -
Re: New Members - please post your introductions here
Hello everyone,
I am Dennis from Ohio.I am ex Navy with a background in television/video repair and installation.I am here to get help on how to read schematics and to troubleshoot amplifiers and receivers.Leave a comment:
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