IBM 6500-V5P Maintenance Manual - Page 268

Main Wire Harness Test Tables, PSA3 Controller Board P106 Connector P107 Connector 19 17 15 13 11 9 7 5 3 1 POD CCF PLAT M PMD LRP LRIB M Connectors are viewed from the top, as seen when plugged into the controller board. 19 17 15 13 11 9 7 5 3 1 MPU PLO EHF* PAPR M CVO RRP HBF RRIB M 20 18 16 14 12 10 8 6 4 2 Resistance Pin No. 20 18 16 14 12 10 8 6 4 2 Resistance Device P106 Pins Normal Device P107 Pins Normal LRIB M 2, 4 and 6,8 7.2 - 8.8 Ω PLAT M 1, 3 and 5, 7 1.35 - 1.65 Ω LRP 10, 12 Open across pins Short across post CCF 9, 11 4.6 KΩ PMD 14, 16 18, 20 8 Meg Ω Open POD 13, 15 17, 19 8 Meg Ω Open CCF = Card Cage Fan LRIB M = Left Ribbon Motor LRP = Left Ribbon Guide PLAT M = Platen Open Motor PMD = Paper Motion Detector (Switch) POD = Paper Out Detect (Switch) RRIB M 2, 4 and 6,8 7.2 - 8.8 Ω PAPR M 1, 3 and 5, 7 0.417 - 0.681 Ω HBF 10, 12 2.7 KΩ EHF 9, 11 4.6 KΩ RRP 14, 16 Open across pins Short across post PLO 13, 15 Continuity: switch closed Open: switch open CVO 18, 20 Continuity: switch closed Open: switch open MPU 17, 19 670 Ω CVO = Cover Open Switch EHF* = Exhaust Fan HBF = Hammer Bank Fan MPU = Magnetic Pickup PAPR M = Paper Feed Motor PLO = Platen Open (Switch) RRIB M = Right Ribbon Motor RRP = Right Ribbon Guide * JMP on pedestal models, used as a spacer J106 MOTOR NOTES: All Motors: Let the motor cool to room temperature before you test it. Use the table values to test for winding continuity and for no shorts between winding and the motor frame. Rotate the motor by hand and test for shorts; replace the motor if you find any shorts. Shuttle Motor = approx. 0.7 - 0.8 Ω per phase, except for the 6500-v20, which shows 0.42 Ω per phase. Use this value to test for winding continuity and for no shorts between windings and the motor frame. Rotate the motor by hand and test for shorts; replace the shuttle frame assembly if you find any shorts All fans have brushless DC motors powered by solid-state circuits and controlled by feedback from a fan rotor position Hall Effect sensor. Fans driven by +48V measure 4 - 5 KΩ. Fans driven by +24V measure 2 - 3 KΩ. A very low reading can mean one of the winding drive transistors is shorted. An open circuit could indicate defective fan electronics or an open cable. Fans will run whenever +48V is present; failure to run can mean a defective cable, connector, or current sense resistor on the controller board. An open circuit current sense resistor (on the controller board) will prevent the fan from running but will not allow software to detect the fault. J107 268