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TROUBLESHOOTING & REPAIR
CONTROL/DISPLAY BOARD REMOVAL & REPLACEMENT (continued)
FIGURE F.29 – CONTROL/DISPLAY BOARD LOCATION
Control/Display Board 
PROCEDURE
5. Carefully remove the board assembly.
1. Remove the input power to the |
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2. Using a phillips head screwdriver remove the | NOTE: The board assembly is attached | to the | |||||
| nameplate/keypad and is to be replaced as | ||||||
| four screws from the corners of the | name- |
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| one unit. |
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| plate/keypad on the front of the machine. See |
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| Figure F.30. |
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| 6. Replace the board assembly. |
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| CAUTION |
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| 7. | Connect previously removed ground lead. | ||
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| 8. | Connect previously removed leads CN1, | CN2, | |
Observe static precautions detailed in PC Board | |||||||
| CN3, & CN7. |
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Troubleshooting Procedures at the beginning of | 9. Replace the four phillips head screws previous- | ||||||
this section. Failure to do so can result in perma- | |||||||
| ly removed from the corners of the | name- | |||||
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nent damage to equipment. | plate/keypad. |
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3.Tilt display plate forward and carefully label and disconnect leads CN1, CN2, CN3 & CN7.
See Figure F.31.
4.Disconnect the ground lead running from the P.C. board to the machine frame. See Figure
F.31.
