Pagewriters With Serial Number Prefix Prior To 3208A - HP PageWriter XL M1705B Service Manual

PageWriters with Serial Number Prefix Prior to 3208A
If the PageWriter has a serial number prefix prior to 3208A, use this
procedure to remove the preview logic board.
Caution
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 and to avoid damage to the preview
display.
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.
6. Remove the screws that hold the preview logic board and shield
assembly to the chassis bottom and rear (see Figure 7-19).
Removal and Replacement 7-27