| Electronics > Repair |
| How to pick repair parts similar to the original? |
| (1/2) > >> |
| Mint.:
So I am in the process of repairing an amplifier as you may have seen by my previous post. I think I have located the problem, but now I don't know where to find the TLP421 Photocoupler. What am I supposed to look out for when finding replacement parts? Datasheet: http://www.datasheetcatalog.org/datasheet/toshiba/2230.pdf |
| Rerouter:
it would help to know if its being used as an analog signal transfer or a digital one, and how its being driven, either current or voltage, if analog you will want to find one with a similar current trasnfer rate and a similar IC vs IF charachteristic, if digital you only need to find one with the same or better on/off times and forward voltage |
| Mint.:
--- Quote from: Rerouter on August 26, 2012, 05:43:21 am ---it would help to know if its being used as an analog signal transfer or a digital one, and how its being driven, either current or voltage, if analog you will want to find one with a similar current trasnfer rate and a similar IC vs IF charachteristic, if digital you only need to find one with the same or better on/off times and forward voltage --- End quote --- Well I'm assuming that it works as an analog signal transfer since it just turns on when mains voltage is on from what I can see. I've attached the schematic. |
| amyk:
http://www.ebay.com/itm/5x-TLP421-P421-Triac-Driver-IC-Optoisolator-Photocoupler-Optocoupler-DIP-4-/110790266679 http://www.ebay.com/itm/5-PCS-TLP421-DIP-4-P421-PHOTOCOUPLER-GaAs-IRED-/110929121524 |
| Mint.:
--- Quote from: amyk on August 26, 2012, 09:24:03 am ---http://www.ebay.com/itm/5x-TLP421-P421-Triac-Driver-IC-Optoisolator-Photocoupler-Optocoupler-DIP-4-/110790266679 http://www.ebay.com/itm/5-PCS-TLP421-DIP-4-P421-PHOTOCOUPLER-GaAs-IRED-/110929121524 --- End quote --- Too expensive! I only need one! |
| Navigation |
| Message Index |
| Next page |