Hospira LifeCare XL Series, Technical & Service Manual

Page: 92 / 278

7.2 REPLACEMENT PROCEDURES
Technical Service Manual 7 - 13 430-00587-008 (Rev. 2/05)
7.2.7.3
CONTROL KNOB, KNOB DETENT, WASHER, GASKET, SNAP
RETAINER, AND DETENT RING REPLACEMENT
Recommended tools for this procedure are a small flat blade screwdriver, a medium size
flat blade screwdriver, a No. 2 Phillips screwdriver, and long needle nose pliers.
The replacement parts for this procedure are:
Retainer, Snap, Knob
Knob, Control
Detent, Knob
Washer, Knob
Gasket, Knob
Ring, Detent
Shim
Magnet
CAUTION: Use proper ESD grounding techniques when handling components.
Wear an antistatic wrist strap and use an ESD-protected workstation. Store the PWA
in an antistatic bag before placing it on any surface.
To replace the control knob, knob detent, washer, gasket, detent ring, and snap retainer,
refer to
Figure 7-4 , then proceed as follows:
1. Separate the front enclosure assembly and rear enclosure assembly as described
in Section 7.2.5 .
2. Remove the display PWA as described in Section 7.2.7.1 .
3. Remove the front panel keys as described in Section 7.2.7.2 .
4. Using long needle nose pliers, carefully remove the snap retainer.
5. Remove the control knob, knob detent, shim, washer, gasket, and detent ring.
6. Inspect the magnet on the knob detent. If the magnet appears damaged, carefully
remove it using the small flat blade screwdriver. Install the replacement, assuring
that the dot on the magnet is facing up.
7. Install the replacement control knob, washer, and gasket.
- Fit the gasket into the circular recess on the front side of the front enclosure.
- Install the washer on the control knob.
- Install the shim on the control knob.
- Place the control knob through the hole in the front enclosure.
- Turn the control knob to OFF/CHARGE.
8. Place the front enclosure assembly face down. Place the detent ring on the four
pins, centered on the control knob. Assure that the raised bumps on the detent
ring are facing up.
9. Using the snap retainer, secure the knob detent on the control knob retainer clips
and splines. Press the snap retainer firmly until it is secure.

Note: When the control knob is at OFF/CHARGE, the knob detent is
positioned on the detent ring as shown in Figure 7-4 .
10. Verify that the control knob rotates fully.
11. Reassemble the device in the exact reverse order of disassembly.