HP PageWriter XL M1705B Service Manual page 165

Warning
0
When the cardiograph is connected to AC power, there are dangerous
voltages on the line module terminals, even when the AC switch is off.
When the AC switch is on, there are also dangerous voltages on the
terminals of the mains transformer. If you must have the AC power
connected while the cardiograph Is open, do not touch any of the
exposed connectors.
The rectifier assembly capacitors store hazardous amounts of energy
during AC and battery operation. Be careful not to touch any of the
exposed capacitor connections.
5, Remove the user interface assembIy as described earlier in this
chapter.
6. Remove the three screws from the rear panel as shown in
Figure 7-13.
Figure 7-13. Opening and Removing the Top Cover Assembly.
7. Slide the top cover forward about 1 inch, then carefully lift it
straight up until there is enough clearance to tilt the left side up.
To remove the top cover assembly, continue as follows:
8. If the cardiograph is equipped with a preview display, disconnect
the cable that connects the preview screen to the preview logic
board and a ground wire. Disconnect the.four cables and the
ground wire that connect the top cover assembly to the CPU
assembly.
9. Lift the top cover assembly out of the way and set it aside.
7-18 Removal and Replacement