IBM 8651RM0 Hardware Maintenance Manual - Page 122
Connectors
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Connectors: If power supplies are OK and the power backplane voltages are incorrect, replace the power backplane. If the voltages are correct, and the Symptom-to-FRU index does not solve the problem, go to "Undetermined Problems" on page 168. J1, J2 Connection +5V DC Return +5V DC Return +5V DC Return +5V DC Return +5V DC Return +12V DC Return +12V DC Return +3.4V DC Return +3.4V DC Return +3.4V DC Return Connector Pins 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Maximum Pin Current 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A 6A J3 Connection +12V -5V SYS On I C SDA I C CLK +5 1V Sense +12 1V Sense +5V SB DC Return System Power Good DC Return I C Present +3 4V Sense Connector Pins 1 2 3 4 5 6 7 8 9 10 11 12 13 Maximum Pin Current 1A 1A