with you guys guiding me, how can I give up
Reason why I really appreciate all your help
killpatrick
Member
Last Activity: 04-18-2021, 12:20 AM
Joined: 11-15-2016
Location: Cainta, Rizal
-
Re: Samsung LA32R81B Not Turning On
with you guys guiding me, how can I give up Reason why I really appreciate all your help
-
Re: Samsung LA32R81B Not Turning On
update, replace the cap with 18n 630v since electronic shop here does not have this, saw the replacement on google, also saw a thread here that 22n can be used as well, tv is now working. thanks a lot guys for the help specially to dick who never gave up. thumbs up to you guysLeave a comment:
-
Re: Samsung LA32R81B Not Turning On
here, as shown in the picture there is a slight bulge and it is no longer flat....Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
if i tried to feel the cap, it feels like it is no longer flat, like in the middle part it feels like it shrink, it is also not very smooth, like you can feel a slight bulge on ends of terminal.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
okay, remove the cm808, then tried to test it on capacitance set to X20n, without touching the lead my meter has 0.02, short the capacitor, then tried to test it, first reading was 1.27, then short it again to test, 1.26, reverse the test leads and short the cap again, 1.25 ans so on, I can't seem to get a consistent reading with this cap. I stop on 1.19
Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
thank you for your patience in helping me with this power supply. really appreciate it.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
Apologies, not zero but no reading. My DMM will display 1 is there are no reading, then 0 if I short the leads.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
thanks, did what you ask and here is my readings. DMM is set to x200
Test leads = Positive lead to ground and Negative to PINS.
24V = 91.6
13V = 97.1
12V = 0 or no reading
5.3V = 80.6
If I reverse the leads, I have no readings.
Thanks,Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
thanks for the response, should I connect the mainboard and the inverter board as well? Or just screw in the power board to the chassis and do the test?Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
For the pin 9, I have 14.5V.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
Hi dick, thanks for the response, it is soldered, I have fix that leg sorry bout that picture.
Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
hi dick, thanks for the response. well i still get the 15.04 on the vcc and on vref still getting 5.02. I see, learning new things. I though the ic is bad,Last edited by killpatrick; 07-18-2020, 04:17 PM.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
Tried to do further voltage checking, with the icm801(mc33067) outout pin12 has a 14V but on the output pin14 I only have 0.29V, should it have the same output voltage? These output are going to the TM802 which I think will pass thru TM801S, the TM801S does not have any output. thanks again.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
I have removed these resistors and tested them and they are within tolerance, RM819 240K = 237K, RM820 240K = 237K, RM821 240K = 237K, RM822 200K = 197K, RM823 200K = 197K, RM824 11K = 10.83K.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
hi guys,
Just an update, so replace the fuse, then did a voltage reading from the hot side, from these resistors that are series from the main cap, RM819 378V - 251V, RM820 251V - 171V, RM821 171V - 109V, RM822 109V - 59V, RM823 59V - 2.5, RM824 2.5 - 0V. If I remove these SMD resistor, can I replace them with the regular resistor with the same value? Also if that is possible, what is the wattage should I use? It is not indicated on the diagram, for example the RM819 it says 200KF/2012 so the replacement should be a 200k resistor?...Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
also check those resistors you have mentioned and they are within specsLeave a comment:
-
Re: Samsung LA32R81B Not Turning On
hi, checked for any shorted components, when I put my test leads in the main cap, there is a short in the circuit, so trace the lines, remove the main cap, still shorted, follow all the lines of the main cap and there's a short in the icb801s. pin 1 is shorted to pin 8, so desoldered the said ic and indead they are short, replaced it with same ic but still havent tested the board since I still have no fuse, will it be okay if I used a 5a glass fuse? Electronic shop have no fuse for 6.3a. thanks guysLeave a comment:
-
Re: Samsung LA32R81B Not Turning On
will do, anyways the 6.3 fuse blown, can I replace it will a glass fuse 5A, the electronic shop does not have the 6.3 fuse i showed them.Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
Well, was going to try a voltage check, but when I plug in the board, heard a slight pop, so unplug it immediately and check, now the RB809 is open, from the schematic you have provided it should be 2ohms, but I have no reading.
Leave a comment:
-
Re: Samsung LA32R81B Not Turning On
Hi Dick,
Here are the test,
Pin 15 = 15.04 x 20VDC
Pin 11 = 0.18 x 20VDC
Pin 10 = 0
Pin 5 = 5.02Leave a comment:
No activity results to display
Leave a comment: