Hi, Just joined this forum after trying to find troubleshooting info on my Sunbeam electric blanket. I don't know what's happened to these blankets. I've had at least three Sunbeam electric blankets and a Biddleford mattress heated cover over the last five years. None have lasted even one season. Sunbeam had a five year warranty and I went through it twice to get replacement blankets, but had to pay shipping each time which ended up costing half as much as the blanket, plus they started "dragging their feet" by the time I reached blanket #3. Growing up, I had a Sunbeam that worked well from my preteen years to college. Unfortunately, it was thrown out at some point.
Anyway, I currently have one unopened blanket, and another identical one that failed. Both have the same circuit board as shown in post #30 here. I swapped out controllers with a known good one and still weak or no heat on the failed blanket making me suspect the tiny circuit board as shown.
Today, if possible, I may try swapping out the resistors with the values shown as indicated here as well as the transistor IF someone can tell me what the number is? Looks like there was some uncertainty in that regard. Also, I have no SM components nor the set up for them so I was going to use 1/8 or 1/4 watt resistors and a standard transistor. Should work if I can fit into the case. IF it is determined that the transistor is just a 2907? (post 35), I have plenty of those in my bins (non-SM PN2907) but had hoped to be sure.
Thanks in advance for any responses.
Anyway, I currently have one unopened blanket, and another identical one that failed. Both have the same circuit board as shown in post #30 here. I swapped out controllers with a known good one and still weak or no heat on the failed blanket making me suspect the tiny circuit board as shown.
Today, if possible, I may try swapping out the resistors with the values shown as indicated here as well as the transistor IF someone can tell me what the number is? Looks like there was some uncertainty in that regard. Also, I have no SM components nor the set up for them so I was going to use 1/8 or 1/4 watt resistors and a standard transistor. Should work if I can fit into the case. IF it is determined that the transistor is just a 2907? (post 35), I have plenty of those in my bins (non-SM PN2907) but had hoped to be sure.
Thanks in advance for any responses.