valutazioni - 4, GPA: 4.3
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6 RECTIFIER Location: The rectifier(s) is located inside on the right side of the stand housing just to the right of the transformer for 1SH Stand and on the right and left side of the stand housing for 2SH Stand. Test Procedures: 1. Disconnect the stand from the power source. 2. Remove the red wire and the black wire from the rectifier. 3. Check the voltage across the (+) and (-) terminals on the rectifier with a voltmeter. Connect the stand to the power source. The indication must be 24 volts dc. 4. Disconnect the stand from the power source. If voltage is present as described, the rectifier is operating properly. If voltage is not present as described, refer to the stand wiring diagrams and check the stand wiring harness. RECTIFIERS (cont.) Removal and Replacement: 1 Disconnect the wires from the rectifier. 2. Remove the #6-32 truss head screw securing the rectifier to the stand housing. 3. Remove the rectifier and discard. 4. Install new rectifier in the stand housing and secure with a #6-32 truss head screw. 5. Refer to Fig 7 and reconnect the wires. FIG. 7 RECTIFIER TERMINALS P1381 P1403.40 + A C A C RED to Right Receptacle Terminal BLU/BLK to Transformer #7 BLK to Left Receptacle Terminal BLU/BLK to Circuit Breaker 28342 061598 Page 8 SERVICE (cont.) TRANSFORMER FIG. 8 TRANSFORMER Location: The transformer(s) is located in the stand housing on the base plate. Test Procedures: 1. Disconnect the stand from the power source. 2. Disconnect the black wire from terminal #5 and the white or red wire from terminal # 6. 3. Check the voltage across the black and white or red wire with a voltmeter. Connect the stand to the power supply. The indication must be: a.) 100 volts ac for two wire 100 volt models. b.) 120 volts ac for two wire 120 volt models. c.) 200 to 240 volts ac for two wire 200 or 240 volt models. 4. Disconnect the stand from the power supply. If voltage is present as described reconnect the wires and proceed to #5. If voltage is not present as described, refer to the wiring diagrams and check the stand wiring harness. P1403.40 5. Disconnet the blue/black wires from terminals #7 and #12 on the transformer. 6. Check the voltage across terminal #7 and #12 of the transformer with a voltmeter. Connect the stand to the power source. The indication must be 24 volts ac. If voltage is present as described the transformer is operating properly. If voltage is not present as described, replace the transformer. Removal and Replacement: 1. Disconnect all the wires from the transformer. 2. Remove the four #6-32 screws securing the transformer and mounting strap to the stand housing. 3. Remove transformer and discard. 4. Install new transformer in the stand housing securing with four #6-32 screws and mounting strap. 5. Refer to Fig. 9 when reconnecting the wires. 28342 061807 SERVICE (cont.) TRANSFORMER (cont.) 1 2 3 4 561 2 3 4 5 6 1 2 3 4 5 6 #6 WHI or RED From Power Supply Connection #6 WHI or Red to Transformer Terminal #2 #1 BLK From Power Supply Connection #5 BLK to Transformer Terminal #1 #1 BLK from Transformer Terminal #5 #2 WHI or Red to Right Transformer Terminal #2 #2 WHI or RED from Transformer Terminal #6 #12 BLU/BLK to Left Circuit Breaker #7 BLU/BLK to Left Rectifier "AC" #6 WHI or RED from Transformer Terminal #2 #12 BLU/BLK to Right Circuit Breaker #2 WHI or RED to Transformer Terminal #6 #2 WHI or Red From Left Transformer Terminal #2 #1 BLK to Transformer Terminal #5 #1 BLK From Right Transformer Terminal #5 LEFT RIGHT #7 BLU/BLK to Right Rectifier "AC" #5 BLK from Transformer Terminal #1#5 BLK to Right Transformer Terminal #1 1 2 3 4 5 6 #6 WHI or RED from Transformer Terminal #2 #12 BLU/BLK to Circuit Breaker #5 BLK From Transformer Terminal #1 #2 WHI or RED From Power Supply Connection #1 BLK From Power Supply Connection #7BLU/BLK to Rectifier Terminal "AC" 1SH STAND 2SH STAND FIG.9 TRANSFORMER TERMINALS P1404 28342 091597 Page 9 SCHEMATIC WIRING DIAGRAM 1 SH STAND 1 SH STAND GRN N L1 +– 12 BLK 1 Front view of Server Contacts TRANSFORMER BLU/BLK BLU/BLK 24VDC AMP WHI 2 BLK AC 4 +– – RECT AC + 5 BLU/BLK BLU/BLK RED 7 6 100 or 120 VOLTS AC 2 WIRE + GND SINGLE PHASE SCHEMATIC WIRING DIAGRAM +– N L1 GRN 2 SH STAND Front view of Server Contacts TRANSFORMER ++ BLU/BLK BLU/BLK AMP WHI 2 BLK AC 4 4 –– 12 BLK 1 24VDC 24VDC – RECT AC + 5 BLU/BLK BLU/BLK 7 RED 6 TRANSFORMER BLU/BLK BLU/BLK 12 1 AMP 2 BLK AC – RECT 100 or 120 VOLTS AC BLK AC + 2 WIRE + GND BLU/BLK BLU/BLK SINGLE PHASE WHI RED 7 6 5 28342 061807 Page 10 SCHEMATIC WIRING DIAGRAM 1 SH STAND, 230V CE 1 SH STAND, 230V CE GRN/YEL L2 L1 +– 8 FUSE 5 230 VOLTS AC, 2 WIRE BLU/BLK BLU/BLK RED 7 SINGLE PHASE 6 27789.0001D 11/98 © 1997 BUNN-O-MATIC CORPORATION Front view of Server Contacts TRANSFORMER BLU/BLK BLU/BLK 12 BRN 1 RESETTABLE BLK + + – AC AC RECT 4 24VDC AMP 11 BLU 2 – BLK SCHEMATIC WIRING DIAGRAM +– GRN/YEL BRN 125BLUBLK 2 SH STAND, 230V CE L2 L1 11 8 FUSE Front view of Server Contacts TRANSFORMER BLU/BLK BLU/BLK BLK AMP 11 2 BLK AC A...