Zoll Impact Uni-Vent 731 Power Knob Kit Replacement

Introduction

This information can be found on page 29 of the Zoll Impact Uni-Vent 731 Ventilator Guide on the iFixit page for the ventilator. This is a simple repair that can be done on this model of Zoll ventilator and should be done whenever there is damage to the power knob.

What you need

Step 1 Power Knob Kit

Zoll Impact Uni-Vent 731 Power Knob Kit Replacement, Power Knob Kit: step 1, image 1 of 1

Loosen but do not remove the(4) 8-32 X 3 screws on the outer air intake
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Step 2

Loosen and remove the (2) 10-32 Keps nuts and the (4) 6-32 X 2 screws. Remove the back case by lifting from the ventilator
Pg. 29

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Step 3

Remove the (2) 4-40 X ¼ screws on the Dovetail Mounting Bracket and disconnect the ribbon cable on the PIM PCB by simultaneously applying pressure on the two locking “ears”
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Step 4

Flip the ventilator over and remove the front case assembly by lifting it straight up away from the ventilator module
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Step 5

Remove the bezel by loosening and removing the (7) 4-40 X ¼ screws that hold the bezel to the front case
Pg. 29

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Step 6

On the membrane panel assembly, loosen the 6-32 X ¼ set screw using a 1/16 Ball Hex Driver (located in the power knob) and lift the damaged knob from the membrane panel
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Step 7

Place the replacement knob on the membrane panel switch -align with flat on switch –insert the included 6-32 X ¼ set screw and tighten
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Step 8

Install the new bezel by tightening the included (7) 4-40 X ¼ screws
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Step 9

Place the front case assembly over the vent module and tighten the (2) 4-40 X ¼ screws unto the dovetail mounting bracket. Reconnect the ribbon cable unto the PIM PCB. Make sure the two locking “ears” lock into position
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Step 10

Attach the back case to the vent module and align cover with handle, air intake housing and dovetail mounting studs. Insert and tighten the included (2) 10-32 Keps nuts and the (4) 6-32 X 2” screws
Pg. 30

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