IBM 6500-V05 Maintenance Manual - Page 253

Hammer Bank Power Cable Shorts Test This test determines if the hammer bank power cable is shorted. 1. Prepare the printer for maintenance (page 313). 2. Cabinet Model: Remove the paper guide assembly (page 348). Pedestal Model: Remove the top cover assembly (page 327). 3. Disconnect hammer bank power cable connector P105 from J105 on the controller board. (See Figure 42, page 406, item 10.) 4. Attach or hold the common lead (usually black) of an Ohmmeter to the shuttle frame. 5. At the hammer bank power cable plug (P05) on the shuttle terminator board, touch pins 2, 4, 6, 8, and 10 with the positive (usually red) meter lead and test for shorts to ground. If you find any shorts to ground, replace the hammer bank power cable. 6. Disconnect the common meter lead from the shuttle frame. 7. Check the hammer bank power cable for shorts by checking pin-to-pin: touch pin 1 with one meter lead and pin 2 with the other meter lead. If there is continuity, it means there is a short. (Continuity is defined as a reading of less than 1 Ohm; in other words, very low resistance.) Repeat this process until you have tested all the pins in the cable. If you find any shorts, replace the cable. 8. Connect hammer bank power cable connector P105 to J105 on the controller board. (See Figure 42, page 406, item 10.) 9. Cabinet Model: Install the paper guide assembly (page 348). Pedestal Model: Install the top cover assembly (page 327). 10. Return the printer to normal operation (page 314). 253