Chosen Solution
Hello, I am an ex-lurker, sub-genius type person who is trying to repair a MBP that appears to have a few problems, one of which is that there is no light on the magsafe connector. I do have Board View and schematic files for the motherboard which is an A1286 - EMC 2253 - 820-2850-a - K18. I am going through the G3 Hot circuit diagnosing the components but I notice that my schematic PDF (pg. 64) does not specify the resistances for some of the resistors. For example R6990, R6992 and R6993 are specified as ‘‘‘5% MF-LF 1/16W 402’’’ This gives me a lot of useful information, but no Ohm value to measure. I have looked at the schematics for other MBP boards, some have the Ohms, but the circuits are different and include diodes. Could someone please help me with the resistance values for these components?
Values are specified right above each resistor symbol. R6990 is 1 Ohm R6992 is 0 Ohm R6993 is 0 Ohm
