User Guide

FM-202 FAN & MOTOR REPLACEMENT INSTRUCTIONS

PARTS SUPPLIED WITH THIS KIT:

(1) Fan Motor with Leads

(1) 3½” Fan Blade

(2) Blue Wire Nuts

(1) Long Shank 3/32” Hex Wrench

(2) 8-32 x ½” Screws

(2) 3/8” Rubber Grommets

(2) #8 Shoulder Washers

To start the installation, read these instructions very carefully. You will need a ¼” drill bit

and a narrow screwdriver at least 4” long. Unplug the amplifier and remove any input, output and

control cables that may be connected to the back of the amplifier. Remove the chassis from the

case. Remove the perforated sheet metal shield from the top of the chassis and remove the tubes.

Place the tubes where they will not be damaged. You are now ready to proceed with the

installation.

( ) Drill a ¼” hole in the left side of the tube compartment 5¾” inches from the rear of the

chassis and about 3/16” up from the under side of the chassis. This will be the screwdriver

access hole for the fan blade setscrew.

( ) If you have not unpacked the motor and fan blade, do so now.

( ) Cut the 2 black fan power wires. Cut them near the motor winding.

( ) With the amplifier right side up, bend the fan blades up until you find the setscrew in the fan

hub.

( ) Put your narrow screwdriver through the hole you drilled and remove the fan blade by

unscrewing the setscrew.

( ) Remove the (2) 10-32 screws that attach the fan motor to the chassis and discard them,

along with any washers.

( ) Remove and discard the 2 rubber grommets that padded the motor mounting screws.

Clean any debris out of thee holes.

( ) Install the new rubber grommets in the motor mounting holes.

( ) Pass 1 of the 8-32 x ½” screws through a shoulder washer. The shoulder of the washer

should face away from the screw head.

( ) Set the new fan motor in place with its mounting holes aligned with the holes in the rubber

grommets.

( ) Pass the screw through the grommet into the adapter block on the fan motor.

( ) In a like manner, repeat for the other 8-32 x ½” screw and shoulder washer.

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FM-202 FAN & MOTOR REPLACEMENT INSTRUCTIONS PART S SUPPLIED WITH T HIS KIT : (1) Fan Motor with Leads (1) 3½” Fan Blade (2) Blue W ire Nuts (1) Long Shank 3/32” Hex Wrench (2) 8-32 x ½” Screws (2) 3/8” Rubber Grom mets (2) #8 Shoulder W ashers To start the installation, read these instructions very carefully. You will n eed a ¼ ” drill bit and a narrow screw driver at least 4” long. Unplug the amplifier and remove any input, output and control cables that may be connected to the back of the amplifier.
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() Tighten both sc rews firmly, but DO NOT over-compress the rubber grommets. () Note that the fan blade is marked to indicate the location of the setscrew. Place the fan blade over the motor shaft with the hub and setscrew toward the chassis. () Lower the fan blade until there is about ¼” clearance between the fan blade and the chassis. Now tighten the setscrew. Spin the fan blade to assure that there is clearance with the chassis and other nearby components.