For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%.

https://www.ebay.com/itm/284411225925?itmmeta … ABk9SR66r7oPeYw

https://html.alldatasheet.com/html-pdf/2596/M … 44/1/BU406.html

https://www.calculator.net/resistor-calculator.html

dominusprog wrote on 2024-04-18, 08:11:

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%. […]
Show full quote

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%.

https://www.ebay.com/itm/284411225925?itmmeta … ABk9SR66r7oPeYw

https://html.alldatasheet.com/html-pdf/2596/M … 44/1/BU406.html

https://www.calculator.net/resistor-calculator.html

Should I worry about the B at the end of the transistor model?
Does the green body of the resistor indicate a high tolerance? I was getting conflicting search results that it might be a choke.

Thanks

DevilTenchi wrote on 2024-04-18, 13:11:

Should I worry about the B at the end of the transistor model? Does the green body of the resistor indicate a high tolerance? I […]
Show full quote

dominusprog wrote on 2024-04-18, 08:11:

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%. […]
Show full quote

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%.

https://www.ebay.com/itm/284411225925?itmmeta … ABk9SR66r7oPeYw

https://html.alldatasheet.com/html-pdf/2596/M … 44/1/BU406.html

https://www.calculator.net/resistor-calculator.html

Should I worry about the B at the end of the transistor model?
Does the green body of the resistor indicate a high tolerance? I was getting conflicting search results that it might be a choke.

Thanks

No, don't worry about that, here is another model that you can use. You'll need an NPN bipolar transistor (BJT).

For the resistor, the last band determines the tolerance.

dominusprog wrote on 2024-04-18, 14:20:

DevilTenchi wrote on 2024-04-18, 13:11:

Should I worry about the B at the end of the transistor model? Does the green body of the resistor indicate a high tolerance? I […]
Show full quote

dominusprog wrote on 2024-04-18, 08:11:

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%. […]
Show full quote

For the transistor you'll need an NPN 16V 5A (or higher) power transistor. The resistor is 220Ω 2%.

https://www.ebay.com/itm/284411225925?itmmeta … ABk9SR66r7oPeYw

https://html.alldatasheet.com/html-pdf/2596/M … 44/1/BU406.html

https://www.calculator.net/resistor-calculator.html

Should I worry about the B at the end of the transistor model?
Does the green body of the resistor indicate a high tolerance? I was getting conflicting search results that it might be a choke.

Thanks

For the resistor, the last band determines the tolerance.

Thanks for all the help.
I can't find any green body resistors in this value, just blue. Ideas on that? Fuse resistor or choke?

DevilTenchi wrote on 2024-04-18, 18:01:

I can't find any green body resistors in this value, just blue. Ideas on that? Fuse resistor or choke?

If the PCB markings say R something it's most likely a resistor. A choke would be L, though obviously last minute design or manufacturing changes are possible. That being said I think it's a resistor, and not a fusible one (these ones tend to be bigger and in general don't have a shiny coating to better dissipate the heat).

Also my eyese might be deceiving me but I think it's a brown - red - black -black - red, which would make 120 ohms rather than 220. Which is way more likely to smoke if one side is connected to 12V and the other was shorted to GND. 220 ohm resistor would get hot but probably not smoke.

DevilTenchi wrote on 2024-04-18, 18:01:

dominusprog wrote on 2024-04-18, 14:20:

DevilTenchi wrote on 2024-04-18, 13:11:

Should I worry about the B at the end of the transistor model?
Does the green body of the resistor indicate a high tolerance? I was getting conflicting search results that it might be a choke.

Thanks

For the resistor, the last band determines the tolerance.

Thanks for all the help.
I can't find any green body resistors in this value, just blue. Ideas on that? Fuse resistor or choke?

You're welcome. As mentioned, it is a resistor and the value is 120Ω not 220Ω, the brown and red coloring is very close.

Thanks for the help everyone.
Clipped the resistor off and put it under a magnifier, does look like the first band is brown.
I looked at pictures of the board on The Retro Web and it looks like the manufacturer used whatever body color they had.
Hope this is all that went bad, I guess I'll know once the parts arrive.

I did find that green body resistors usually indicate a pulse power/surge resistor.
Learned something....

Just my two cents about the resistor:
I think it´s clearly red/black/black/red/ brown = 20KOhm, 1%
Did you measure the resistance with one leg open? I doubt it´s even broken.

Q4 is probably an adjustable shunt (TL431) and should also be checked. Resistors in the 20KOhms range for adjusting the voltage are typical in this case.