IBM 4247-003 Maintenance Manual - Page 274
Models A00
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2. If a 2 pin jumper is installed on a 2 pin connector then + 5 V dc is enabled to pin 18. 3. If a 2 pin jumper is installed on a 3 pin connector, as shown in Figure 47, use the chart below and verify the jumper is installed to enable +5 V dc on pin 18. If the jumper is not installed correctly, move it to the pins shown in the chart. 123 Logic Board Parallel Connector Figure 47. Models A00, 001, and 002 Pin 18 +5V Jumper Location. (Viewed From Rear) Note: If after installing the logic board, the NPS 540+ power light is not lighted, check for + 5 V dc on pin 18 with a volt meter (pin 18 is shown on connector). Table 43. Model A00 logic board jumper location to enable +5 V dc on pin 18: 4247 A00 Logic Board Level Install jumper between pins Level 1 , 2, 3 logic board 2 and 3 Level 4 logic board 1 and 2 Table 44. Models 001 and 002 logic board jumper location to enable +5 V dc on pin 18: 4247 001, 002 Logic Board Level Install jumper between pins Level 1 , 2, logic board 2 and 3 Level 3 logic board 1 and 2 Chapter 4. Locations 274
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