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Top Case Assembly
4-56
Top Case Assembly
Description
The top case assembly consists of the following components, all pre assem-
bled into the case at the factory.
Display window.
IRDA and Ambient Light lenses.
Main Keypad subassembly.
Printer ribbon cable
Should the case itself or any one of these components sustain damage, the top
case assembly must be replaced.
Removal and replacement
The Top Case is probably the most difficult and time consuming repair that
can be done on the M3500B/M5500B. Some parts need to be moved from the
old case to the new; and new parts must be installed. Some of the new parts
come with the top case and some must be ordered separately.
Parts to be moved from old top case to new
The following subassemblies must be removed from the old top case and
installed into the new one. Follow the Removal and Replacement instructions
in this chapter for each subassembly. Remove them in the order shown, and
replace them in reverse order.
1. Printer (see "Printer Assembly" on page 4-11).
2. Manual door and label (see "Manual Door" on page 4-4).
3. Shaft and mounting rails for Manual Door ("Manual Keypad Assembly"
on page 4-44).
4. Control stack ("Control Stack" on page 4-33).
5. Interface PCA, with its ribbon cable and insulating shield (see "Interface
PCA" on page 4-50).
6. SpO
connector and flex circuit (if present) (see "SpO
2
page 4-42).
7. ECG connector and cable with ferrite (see "ECG Connector" on page 4-
40).
8. SpO
PCA (if present) and flex with ferrite (see "SpO2 PCA" on page 4-
2
38). The flex circuit and ferrite will be reused.
9. Speaker, hardware, tape (see "Speaker" on page 4-55).
10. All screws.
Connector" on
2
Removal and Replacement
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