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Re: Sony KDL-37m400 Relay Click...... Nothing
Forgot to answer, the other boards don't appear to have gotten wet. Possibly the power board but I don't think there is anything to see on the underside is there?Comment
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Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sony KDL-37m400 Relay Click...... Nothing
I guess I should also include that I have 2 blinks after the set turns off.Comment
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Re: Sony KDL-37m400 Relay Click...... Nothing
So I flipped the power board as per Selldoors request to get a pic and figured I'd check out a few of the diodes for integrity and what do you know I found a bad one!
Selldoor, thanks for being patient with me. I'm trying to learn as I go but I am easily distracted.
So included are a pic of the inverter board, backside of power board and a close-up of the offending diode. Now, how the heck am I supposed to fix this tiny little diode and how will I figure out what direction to put it in?
Thank youAttached FilesComment
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Re: Sony KDL-37m400 Relay Click...... Nothing
Pulled and tested the diode off the board and it tested fine. I replaced it anyways and I still have the same problem. Can anyone enlighten me as to what makes a diode test bad in circuit?Comment
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I was working on this CNC machine today found no keyboard functioning no control relay powering on
The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board
Found shorted diodes on main controller relays there are 3 of them that... -
Hello and happy new year ,
my Analog Combustion Machine Honeywell gone bad and I don't know what type of diode is utilized.
There is no mark around the body of the diode. The Schematics are general referred only, without any electronics components and values.
The two contacts (2),(5) of the Relay Coil need 48 Volts DC to begin operating. Between these two contacts in series is the bad diode and near of contact (5) is the bad pnp (bc856b) Transistor that can be easily replaced.
I have made a diagram of the PCB and some measurements along some... -
I have a Sony XBR-65X850E that when plugged in buzzes for a few seconds about 5-7 times but the screen never comes on. It looks like one of the four diodes on the main power supply board are bad. I'd like to replace all four at the same time. The diodes that are bad are the D750, D751, D752 and D753. The S750 looks discolored and fails the diode test on the board. It hasn't been removed from the board yet for testing.
Are all four of these the same diode? I saw a video that called the discolored one a Schottky 5150 diode. How can I make sure to get the right diodes for these?... -
Buenas mi nombre es carlos me uni al foro porque estoy buscando el schematic de una sony vaio pcg-41217u otras formas de escribirlo son 1p-0117j01-a012 mbx-237 numero de placa revision 1.2 o Sony VPCSB (MBX-237), en fin me gustaria y ayudaria un monton si alguien me puede dar dichi svhematic para hacer las mediciones de una laptop de la mencionada anteriormente(Sony VAIO PCG-41217U) con el fin de repararla dejo de funcionar solo prende el led de la bateria al pulsar el boton de power el disco empiesa a hacer ruido de actividad pero los leds del frontas no reflejan acividad y no enciende la pantalla.... -
Diagnosed this TV as having a failed main board which I've replaced with one from a KDL 55HX850. They are (supposedly) the same board.
Being 'Smart TV' it requires a firmware reboot when you swap out boards such as T-Con or main board. It starts with a black screen and flashing yellow and green LEDS, indicating it needs that firmware boot. The procedure described all over the web is to put the software into the root directory of a FAT32 formatted USB drive and it should load that up once plugged into USB1 port. But not for me. I can see the LED on the USB chip flash for about...
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