The Preview Logic Board; Removing The Preview Logic Board; Pagewriters With Serial Number Prefix 3208A Or Later - HP PageWriter XL M1705B Service Manual

The Preview
Board
Logic
This section describes how to remove and replace the preview logic
board. These procedures apply only to models equipped with the
preview display option.
Removing the Preview
The procedure you will use depends on the serial number prefix of
Logic Board
the unit you are servicing. Make sure you use the correct procedure
for your particular PageWriter.
PageWriters with Serial Number Prefix 3208A or Later
If the PageWriter has a serial number prefix of 3208A or later, use
this procedure to remove the preview logic board.
Caution
Q
Use an electrostatic wrist band or other approved method for
protection against electrostatic discharge when disconnecting and
handling the preview logic board.
To remove the preview logic board:
Warning Perform the following four steps sequentially to eliminate the chance of
exposure to hazardous voltages.
1. Disconnect the AC power cord.
2. Verify that no disk is in the disk drive.
3. Turn the cardiograph On. (This allows the rectifier assembly
capacitors to discharge more rapidly.)
4. Remove the battery as described earlier in this chapter.
5. Remove the top cover assembly as described previously in this
chapter.
Removal and Replacement 7-25