Do you know where I could find these opto-couplers?
Thank you. All I need now is to find these opto-couplers 7412 is 9322-105-14682 7406 and 7413 are the same part number 9338-894-15682. I seaced eerywhere I could think of and can't seem to find them. Would you know where to find them? I found the fluid in 16 oz bottles foe $7 + shipping.
Thank You so much.
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Re: Do you know where I could find these opto-couplers?
When you look into the back of the set you will see a small board on the far left. The large board right next to the small board is where they are located on that board usually near the back edge of the board closest to you roughly in the center. You can try at the following link just leave them an email with the model number of your set and what youre looking for, They usually can get the hard to find parts. Heres the link. http://servicemanuals.vstore.ca/
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hi, yes , it is reparable. ur tvs smps power supply have some problem. check th fuse first. also check the over surge protector MOV is short or not. also check the STR power drive in the power supply. just relapse. below is the photo of MOV and STR. if u repalce the STR also try to replase the opto coupler also. added the photo of opto coupler. ok
The power supply, from memory, uses an STR type power supply chip and is controlled by use of an opto coupler. In my experience the opto couplers hardly ever give trouble, nor the STR's if caught in time. Change the capacitors around that part of the board within the hatched area especially look out for 22 or 47uF 35 Volt start up capacitor. Hope that helps but the models changed from week to week depending on which factory the ubits came from.
mostly this problem cause opto coupler is short. change the opto coupler and related parts like transistors,zener diode.and check all diodes&capacitors is power supply. you find any leaky or damaged part change it. thank you
Check SMPS circuit. Check for dry capcitors. Replace OPTO coupler in the feed back circuit in SMPS.
Do not switch ON TV without opto coupler fixed in circuit.
SMPS will go out of control and the + DC voltage will raise infinitely and damage the other parts. If transistors used along with the opto coupler, check them for leakage. Replace them. Otherwise the replaced opto coupler may fail again after few days or few hours of TV working.
The opto coupler is usually related to just the pic starting out small then filling out after warming. The flyback wouldnt stop the power led from coming on unless the HOT shorted but that would blow a fuse. Check your fuses. You can sign up here for free and your solutions are what gives you your ranking on the site. Premium assistance is a service that requires payment, but I am not sure how that works as I try to help people for free on here
The halo effect is due to the green and blue CRT coolant being congealed this is a common problem. Red will not have the same condition. As for the opto-couplers they are located on the large signal board in the middle of the board all lined up in a row they will have board location numbers of 7412, 7406 and 7413 . 7412 is usually the culprit the part numbers for 7412 is 9322-105-14682 7406 and 7413 are the same part number 9338-894-15682