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

The Preview Screen
This section describes how to remove and replace the preview screen
Assembly
assembly.
Note ,I
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PageWriters having a serial number prefix of 3208A or later have a
new design that allows easier component-level repair of the preview
screen assembly.
Removing the Preview
The procedure you will use depends on the serial number prefix of
Screen Assembly
the unit you are servicing. Make sure you use the correct procedure
for your particular PageWriter.
When you remove the preview screen assembly, you can either
disassemble it completely, or you can remove the assembly as a
single piece that includes the clutches and cables. (The complete
replacement preview assembly also includes clutches and cables.)
This section includes instructions for removing the preview assembly
as a whole and for disassembling it.
PageWriters with Serial Number Prefix 3208A or Later
If the PageWriter has a serial number prefix 320SA or later, use these
procedures to remove or disassemble the preview screen assembly.
Removing the Entire Preview Screen Assembly.
Use this procedure to
remove the preview screen assembly as a single unit.
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 OIL (This allows the rectifier assembly
capacitors to discharge more rapidly.)
4. Remove the battery as described earlier in this chapter.
5. Remove the left and right clutch covers:
a. Insert a small flat-bladed screwdriver in the slot at the bottom
rear of the cover and gently pry up till the catch releases.
b. Tilt the cover forward slightly to disengage the tabs at the
front, then lift the cover away. (This is easier if the screen
assembly lays flat on the PageWriter.)
6. Remove the mounting screws and washers from the left and right
clutches.
7. Lift the preview screen assembly off of the cardiograph.
S. Remove the user interface as described earlier in this chapter.
7-12 Removal and Replacement