where can i get electrical components???

[shlomi93]

hey guys!
first of all.. i just found out about this forum and i must say its awesome!!!!!!!
i have hyundai monitor and the inverter transformer gone bad.. i think
and i have one more monito and when the screen gose into sleep mode it start to beep so i checked it and its also the inverter transformer..
but where can i get those inverter transformerss??? i didnt found on ebay or aliexpress

heres a pic of the Hyundai "17 inverter transformer.

[budm]

Re: where can i get electrical components???

Why do you think the transfomer is bad?
BTW, that is not inverter transformer, that is the SMPS power transformer, the two high voltage transformer are the two smaller one that drive the CCFL.
What exactly the monitor not doing? What voltages do you get at the connector to the logic/main board.
Model number of the monitor?
You should also move the questions to the monitor section not in FAQ section.

[jetadm123]

Re: where can i get electrical components???

That main transformer rarely fails. Most likely not the cause of your problems.

[shlomi93]

Re: where can i get electrical components???

Why do you think the transfomer is bad?
BTW, that is not inverter transformer, that is the SMPS power transformer, the two high voltage transformer are the two smaller one that drive the CCFL.
What exactly the monitor not doing? What voltages do you get at the connector to the logic/main board.
Model number of the monitor?
You should also move the questions to the monitor section not in FAQ section.

1. well in the showed side i get 0-190+- AC {gose up and gose down constantly}
and on the other side there is no value..
2. the monitor turn on then gose black after 3-2 sec. CCFL tested and looks good.
3. this is Hyundai x93w
4. this is the power supply board
http://www.dhgate.com/product/origin...159469153.html

That main transformer rarely fails. Most likely not the cause of your problems.

you probably right. im not so good in electricity components but im learning..
so any one here can give me tips on how to check electricity components ?
like capacitors. thats like, really easy! the value is writing on the capacitor.
but on other components i dont know what values i need to get, or not to get.

so any tips??


BTW
in a component datasheet PDF, there is good value that the components need to give me if ill check it on multimeter?

[budm]

Re: where can i get electrical components???

"1. well in the showed side i get 0-190+- AC {gose up and gose down constantly}
and on the other side there is no value.." You not reading it correctly and also that the switching frequency will be around 70~100KHz which your DIGITAL meter is not going to show AC Voltage at that frequency.
This power supply /inverter board is an always on power supply, so that is why I ask if you do have any DCV at the connector feeding the logic/main board, you can also disconnect that cable and see if the output dc Voltage will be steady without the main board connect. You can also have shorted circuit in the inverter section that causes the power supply to be cycling on and off. BTW, what did you use for the GND REF point for the meter when you make that measurement?

"2. the monitor turn on then gose black after 3-2 sec. CCFL tested and looks good." if ALL the lamps tested OK, then you have problem in the inverter circuits such as bad power MOSFETs, bad inverter transformers, diodes, etc.
Read 2-second to black troubleshooting.
Also upload a straight shot pictures of the bottom and top side of the board so we can tell you where to check the power MOSFETs.

[shlomi93]

Re: where can i get electrical components???

"1. well in the showed side i get 0-190+- AC {gose up and gose down constantly}
and on the other side there is no value.." You not reading it correctly and also that the switching frequency will be around 70~100KHz which your DIGITAL meter is not going to show AC Voltage at that frequency.
This power supply /inverter board is an always on power supply, so that is why I ask if you do have any DCV at the connector feeding the logic/main board, you can also disconnect that cable and see if the output dc Voltage will be steady without the main board connect. You can also have shorted circuit in the inverter section that causes the power supply to be cycling on and off. BTW, what did you use for the GND REF point for the meter when you make that measurement?

"2. the monitor turn on then gose black after 3-2 sec. CCFL tested and looks good." if ALL the lamps tested OK, then you have problem in the inverter circuits such as bad power MOSFETs, bad inverter transformers, diodes, etc.
Read 2-second to black troubleshooting.
Also upload a straight shot pictures of the bottom and top side of the board so we can tell you where to check the power MOSFETs.

"what did you use for the GND REF point for the meter when you make that measurement?"
dont know what you mean...

i have like 6-7 diodes on the board. should i take them out for a check? all of them?

2 pics of front so you can see all components:
* the diode in red was taken out for a check and found good.

[selldoor]

Re: where can i get electrical components???

Please can you stop posting pictures inline and offsite - use the manage attachments
facility.

dont know what you mean...

When testing on the primary side of the board you need to use the negative leg of the BIG cap as ground.
When testing on the secondary (cold) side of the board use a ground screw.hole on the board.
DO NOT try and test voltage to the lamps. or from the Inverter transformers
May be up to 4000 volts.

How did you test the ccfls.

Next to test would be the secondary windings on the Inverter transformers
with the power OFF

Diodes test them on the board and any that fail lift one leg and re-test.

[shlomi93]

Re: where can i get electrical components???

Please can you stop posting pictures inline and offsite - use the manage attachments
facility.

dont know what you mean...

When testing on the primary side of the board you need to use the negative leg of the BIG cap as ground.
When testing on the secondary (cold) side of the board use a ground screw.hole on the board.
DO NOT try and test voltage to the lamps. or from the Inverter transformers
May be up to 4000 volts.

How did you test the ccfls.

Next to test would be the secondary windings on the Inverter transformers
with the power OFF

Diodes test them on the board and any that fail lift one leg and re-test.

hey
sorry about the pics.. i will use the manage attachments from now on.
ok so i checked the diode on the board and the resultes are not good.
i know that i need to get 0.5-0.8 on a good diode and i get:
2 diode SR5150 give 370+/-
2 diode SB540 give me 150+/-

soo i guess those are not good.
so ill replace them tomorrow..

im right about the 0.5-0.8 value right???

[newtothis]

Re: where can i get electrical components???

What do you mean 0.5-0.8? 0.5-0.8 what exactly?

Have you set your meter to diode mode and tested with red first to + and black to - then vica versa?

They should allow continuity one way and not in reverse.

If they fail then lift a leg from the board and restest

[budm]

Re: where can i get electrical components???

"i know that i need to get 0.5-0.8 on a good diode and i get:
2 diode SR5150 give 370+/-
2 diode SB540 give me 150+/-"
What mode did you set to to test the diodes? It sounds like you set it in VOLT mode (dc or ac).
My post #5:
This power supply /inverter board is an always on power supply, so that is why I ask if you do have any DCV at the connector feeding the logic/main board, you can also disconnect that cable and see if the output dc Voltage will be steady without the main board connect. You can also have shorted circuit in the inverter section that causes the power supply to be cycling on and off. BTW, what did you use for the GND REF point for the meter when you make that measurement?"
So you do you have?

[shlomi93]

Re: where can i get electrical components???

What do you mean 0.5-0.8? 0.5-0.8 what exactly?

Have you set your meter to diode mode and tested with red first to + and black to - then vica versa?

They should allow continuity one way and not in reverse.

If they fail then lift a leg from the board and restest

the diode continuity is only in one way but the value is low.
i set the DMM on diode mode and those are the results..
look at the pic.

"i know that i need to get 0.5-0.8 on a good diode and i get:
2 diode SR5150 give 370+/-
2 diode SB540 give me 150+/-"
What mode did you set to to test the diodes? It sounds like you set it in VOLT mode (dc or ac).
My post #5:
This power supply /inverter board is an always on power supply, so that is why I ask if you do have any DCV at the connector feeding the logic/main board, you can also disconnect that cable and see if the output dc Voltage will be steady without the main board connect. You can also have shorted circuit in the inverter section that causes the power supply to be cycling on and off. BTW, what did you use for the GND REF point for the meter when you make that measurement?"
So you do you have?

no im on diode mode.. look at the pic.

[selldoor]

Re: where can i get electrical components???

Ok I think the 0.5 to 0.8 is volts on the diode setting as in retiredcaps guide is says 0.5 to 0.7.

BUT you need to test twice once as you did in the picture then swap over the probes and test again

Here is the guide - there are lots of useful tests in there most with no power to the board.

https://www.badcaps.net/forum/showpo...4&postcount=19

[budm]

Re: where can i get electrical components???

SB540 has Vf of 0.48V at 5A If, so the Vf will be lower when using the diode mode due to very low test current, see FIG 3 Graph, but as selldoor suggested, you need to swap the probes also. i always check the diode for short or leakage using Ohm mode.

Again, you need to diconnect some of the load to see if the Power supply will stay on as noted in my post #5.