Opening And Removing The Top Cover Assembly - HP PageWriter XL M1705B Service Manual

Warning
9
PageWriters with Serial Number Prefix Prior to 3208A
If the PageWriter has a serial number prefix prior to 3208A, use this
procedure to open and remove the top cover assembly.
To open the top cover assembly:
1. Disconnect the AC cord.
2. Turn on the cardiograph and remove the battery while the
cardiograph is on. (This discharges the rectifier assembly in
approximately 20 seconds.)
3. Remove the PageWriter from the cart and place it on a suitable
work surface.
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.
4.
Remove the seven screws from the rear panel as shown in
Figure
7-14.
M1700-22
Figure 7-14. Opening and Removing the Top Cover Assembly.
5. 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.
Removal and Replacement 7-19