Hello,

I have a charger for a Bosch PSR 1800 LI-2 cordless drill/driver, which no longer charges. I've opened the charger up, and can see that one of the resistors has now expired. I am having trouble identifying what value the resistor is - so that I can purchase a replacement.

The following are photographs of the expired resistor, and I have found the following information online, which suggests a 3,9 Ohm resistor, but I am unsure whether this is correct: BOSCH AL2215CV Battery Charger Diagram: PCB2005 REV1, 1607502155-B, 18V/1.5Ah (elektroda.com)

Can anyone identify the resistor's value and perhaps provide a link to a suitable replacement?

Any advice welcome,

Thanks,
Duncan.

 

Looks like 3.6 ohms ( orange, blue, black, silver)
It's the current sense resistor for the mosfet, R6, the Mosfet on the heatsink will be blown as well.

 

Looks like 3.6 ohms ( orange, blue, black, silver)
It's the current sense resistor for the mosfet, R6, the Mosfet on the heatsink will be blown as well.

Thank you for info Dodgydave

 

Hello,

I have a charger for a Bosch PSR 1800 LI-2 cordless drill/driver, which no longer charges. I've opened the charger up, and can see that one of the resistors has now expired. I am having trouble identifying what value the resistor is - so that I can purchase a replacement.

The following are photographs of the expired resistor, and I have found the following information online, which suggests a 3,9 Ohm resistor, but I am unsure whether this is correct: BOSCH AL2215CV Battery Charger Diagram: PCB2005 REV1, 1607502155-B, 18V/1.5Ah (elektroda.com)

Can anyone identify the resistor's value and perhaps provide a link to a suitable replacement?

Any advice welcome,

Thanks,
Duncan.

View attachment 320628View attachment 320629View attachment 320630View attachment 320631

I would go by the schematic. Because it probably is a 3.9 ohm resistor. Even though 3.6 would be an insignificant change. But yes, most likely the mosfet is shorted and took out the resistor.

 

I see orange, white, black, silver which would make it 3.9Ω ±10%.