Hammer Bank Power Cable Shorts Test - Printronix P7000 Series Maintenance Manual

Chapter 4

Hammer Bank Power Cable Shorts Test

13. Install the ribbon. (Refer to the User's Manual .)
14. Return the printer to normal operation (page 231).
Hammer Bank Power Cable Shorts Test
This test determines if the hammer bank power cable is shorted.
1. Prepare the printer for maintenance (page 230).
2. Cabinet Models: Remove the paper path (page 303).
Pedestal Models: Remove the top cover assembly (page 281).
3. Disconnect hammer bank power cable connector P105 from J105 on the
controller board. (See Figure 47, page 342, 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 each of the 10 pins 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 47, page 342, item 10.)
9. Cabinet Models: Install the paper path (page 303).
Pedestal Models: Install the top cover assembly (page 281).
10. Return the printer to normal operation (page 231).
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