Replacing The Preview Screen Assembly; The Top Cover Assembly; Opening And Removing The Top Cover Assembly - HP PageWriter XL M1705B Service Manual

a
Replacing the Preview
To replace the preview screen assembly, reverse the appropriate
Screen Assembly
removal procedure.
Note ,I
WI
When reinstalling the ribbon cable from the display to the power
supply board, be sure not to twist the cable or the display may not
operate.
The Top Cover
Assembly
e
Opening and Removing
the Top Cover Assembly
Note ,I
w
This section describes how to remove and replace the top cover
assembly. The top cover assembly includes the upper chassis and
attached covers, the printer assembly, and, on the M1700A, the
preview screen assembly.
To ensure your safety and prevent damage to the cardiograph, these
procedures instruct you to remove the battery
and
disconnect the
AC power, which means that the contents of system memory will be
lost, including the configuration and software. When you reapply
power to the M1700A or M1701A cardiograph, you must install the
software using either the System disk supplied with the cardiograph
or a custom configuration disk. Before removing the M1702A battery,
print a copy of the cardiograph configuration to facilitate restoring
the configuration when power is reapplied. See "Installing Software"
in Chapter 2.
The procedure you will use depends on the serial number prefix of
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 open and remove the top cover assembly.
You can service any PageWriter with a serial number prefix of 3208A
or later without removing it from the cart.
To open the top cover assembly:
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.
Removal and Replacement 7-17