the 950 has a pile of charging circuitry on the motherboard near the tiny plug where the power comes in from the 2 metal fet, but on the underside of that socket. [br]
[br]
The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
[br]
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself or one of the many fuses between the power in and the battery)[br]
[br]
ultimately the mosfet pin 1-3 are the input power (20v) from the base station, pin 4 is gate and should be ~14v, pin 5-8 is battery voltage (~12v if battery is low, ~16v if battery is fully charged).[br]
[br]
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)[br]
[br]
-
remember.... attempt to fix at your own risks, batteries are dangerous etc standard disclaimers
+
remember.... attempt to fix at your own risks, batteries are dangerous etc standard disclaimers[br]
the 950 has a pile of charging circuitry on the motherboard near the tiny plug where the power comes in from the 2 metal fet, but on the underside of that socket. [br]
[br]
The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
[br]
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself or one of the many fuses between the power in and the battery)[br]
[br]
ultimately the mosfet pin 1-3 are the input power (20v) from the base station, pin 4 is gate and should be ~14v, pin 5-8 is battery voltage (~12v if battery is low, ~16v if battery is fully charged).[br]
[br]
-
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)
+
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)[br]
+
[br]
+
remember.... attempt to fix at your own risks, batteries are dangerous etc standard disclaimers
the 950 has a pile of charging circuitry on the motherboard near the tiny plug where the power comes in from the 2 metal fet, but on the underside of that socket. [br]
[br]
The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
[br]
-
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself)[br]
+
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself or one of the many fuses between the power in and the battery)[br]
[br]
ultimately the mosfet pin 1-3 are the input power (20v) from the base station, pin 4 is gate and should be ~14v, pin 5-8 is battery voltage (~12v if battery is low, ~16v if battery is fully charged).[br]
[br]
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)
the 950 has a pile of charging circuitry near the plug where the power comes in from the 2 metal fet, but on the underside of that socket. The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
+
the 950 has a pile of charging circuitry on the motherboard near the tiny plug where the power comes in from the 2 metal fet, but on the underside of that socket. [br]
+
[br]
+
The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
[br]
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself)[br]
[br]
ultimately the mosfet pin 1-3 are the input power (20v) from the base station, pin 4 is gate and should be ~14v, pin 5-8 is battery voltage (~12v if battery is low, ~16v if battery is fully charged).[br]
[br]
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)
the 950 has a pile of charging circuitry near the plug where the power comes in from the 2 metal fet, but on the underside of that socket. The mosfet q10 appears to be a p-mosfet. it needs 14v on its gate (pin 4), whihc is controlled by a pile of resistors and transistors....[br]
+
the 950 has a pile of charging circuitry near the plug where the power comes in from the 2 metal fet, but on the underside of that socket. The mosfet q10 (labled NL9345 but not a part number i can locate) appears to be a p-mosfet in charge of switching power to the battery for charging. it needs 14v on its gate (pin 4), which is controlled by a pile of transistors / biased by a few resistor networks.......[br]
[br]
-
Check gate voltage of that mosfet, if its around 20v / aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. there are 3 resistors next to mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those. if they look right and you still not gettign right voltage at mosfet gate, then possibly something else around that area of the board (theres a few tiny transistors around there too which possibly could be the issue)
+
Check gate pin voltage of that mosfet, if its around 20v / loosely aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. There are 3 resistors next to that mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those are correct values. if they look right and you still not getting right voltage at mosfet gate, then possibly something else around that area of the board has gone bad(he tiny transistors around there? the diodes or the mosfet itself)[br]
+
[br]
+
ultimately the mosfet pin 1-3 are the input power (20v) from the base station, pin 4 is gate and should be ~14v, pin 5-8 is battery voltage (~12v if battery is low, ~16v if battery is fully charged).[br]
+
[br]
+
if mosfet is bad, try looking for something that will fit the "outer pads, be much easier to solder and to buy.... (sorry i dont have a recommended part but above voltages should give you an idea)
the 950 has a pile of charging circuitry near the plug where the power comes in from the 2 metal fet, but on the underside of that socket. The mosfet q10 appears to be a p-mosfet. it needs 14v on its gate (pin 4), whihc is controlled by a pile of resistors and transistors....[br]
[br]
Check gate voltage of that mosfet, if its around 20v / aligned with input voltage then thats why its not charging / why signal isnt reaching mosfet. in my case it was caused by r89 being opened. there are 3 resistors next to mosfet - r97 > 57 ohms, r88 -> 57 ohms, r89 -> 2.2kohms, confirm those. if they look right and you still not gettign right voltage at mosfet gate, then possibly something else around that area of the board (theres a few tiny transistors around there too which possibly could be the issue)