Service manual

PN 4237242C

4.25-1

SERVICE AND REPAIR PROCEDURES

DILUTER PANEL SOLENOIDS

4.25 DILUTER PANEL SOLENOIDS

Tools/Supplies Needed

B #2 Phillips-head screwdriver

Removal

1. Turn OFF the instrument’s power.

2. Open the lower chassis as directed in Heading 4.4.

3. Locate the Solenoid Interconnect card (Figure 4.4-1).

4. Disconnect the connector for the solenoid you are replacing and free the cable of any

wire ties or obstructions so that the connector can easily be pulled through the Diluter

Panel from the front.

5. If there is an extension cable on the solenoid (LV5, LV11), remove it and install it on the

replacement solenoid.

6. Remove the Diluter Panel shield with door. The shield is held in place with three captive

thumbscrews.

7. Remove the two screws that hold the solenoid onto the Diluter Panel. The screws are

visible from the front and there is no loose hardware to contain when removing the

screws.

8. Pull the solenoid out of the Diluter Panel being careful not to snag the connector.

Installation

1. Push the wiring and connector for the new solenoid through the Diluter Panel

mounting, hole and with two screws fasten the solenoid to the Diluter Panel.

2. Locate the connector (using a hemostat if necessary) and connect the cable to the

Solenoid Interconnect card.

3. Replace the Diluter Panel shield with door, with three captive thumbscrews.

4. Turn On the instrument’s power.

Verification

1. Run the Service Diagnostic in Table 7.3-1, to verify solenoid operation. Putting a finger

on the small plunger at the front of the solenoid helps verify mechanical activation.

2. Perform an SVP (Heading 5.1).