Hitachi CV-SF90 Service Manual

SERVICE MANUAL

CV-SF90

VC No.0208E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

CONTENTS

1.Attachments ･････････････････････････････2

2.Replacement instructions

･･････････････････2

3.How to empty the dust case

･･･････････････4

4.Maintenance

････････････････････････････5

5.Final test

････････････････････････････････8

6.General instructions for
operation and maintenance

････････････････8

7.Parts list

････････････････････････････････9

8.Construction diagram and

connection diagram

･･････････････････････11

SPECIFICATIONS

Rated voltage :AC240V, 50-60Hz
Rated input :900W, MAX 1000W
Motor :Commutator motor
Fan :Turbo type 1 stage
Speed :39,000rpm
Insulation class of materials :Class E
Weight(Without attachment) :3.6kg
Dimensions :330mm(L)x255mm(W)x208mm(H)

VACUUM CLEANER

JANUARY 2004 Hitachi Home &Life Solutions,lnc.

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1. Attachments

2. Replacement instructions

2.1 How to replace the power control board assembly, motor assembly and lead wire
assembly (include triac PWB assembly).

(1)Open the dust case cover while pressing the button of dust case, and lift out the dust case from

cleaner body.

(2)Take off three tapping screws 4x20(7)(8)and two tapping screws 4x12(9), then the upper case

assembly can be removed.

(3)Take out the power control board assembly(13), motor assembly(18) and lead wire assembly(16)

from the lower case .

(4)Release the triac PWB assembly by taking off the lower case.

2.2 How to replace the power cord

(1)Open the dust case cover while pressing the button of dust case,and lift out the dust case from

cleaner body.

(2)Take off three tapping screws 4x20(7)(8) and two tapping screws 4x12(9), then the upper case

assembly can be removed.
(3)Take out the cord reel assembly from the lower case .
(4)After rotate the cord reel assembly anticlockwise several times by pushing the C pedal to release prewind

of cord reel, take of four tapping screws 4x16 can be taken out.

Hose ass'y (With control panel handset and joint pipe)

････1

Ion Air Turbine Brush

･････････････････････････････････1

Telescopic Extension Pipe

･････････････････････････････1

Crevice nozzle

･･････････････････････････････････････1

Carrying Handle

･･････････････････････････････････････1

C pedal

Cord reel assembly

four tapping screws 4x16

(5)After assembly, wind a spring 5 times before set.

-3-

2.3 How to replace the dust indicator assembly

(1)Take off the inner case(15) can be removed.
(2)Take out the dust indicator assembly.

2.4 How to disassemble the ion air turbine brush

(1)How to replace roller ass'y(F)

Insert a blade of cutter between the roller shaft cover and lower case of ion air turbine brush

(2positions, both edges off the ion air turbine brush), cut the projection of roller ass'y cover(F). And
detach the roller shaft cover(F) from the ion air turbine brush with a screwdriver. (When you
maintenance the roller ass'y, please settle the ion air turbine brush firmly, and be careful the blade

of cutter not to be broken.)
Detach the roller shaft and roller ass'y(F) from the ion air turbine brush.
Insert a roller shaft into new roller ass'y(F) and install it into lower case of ion air turbine brush.

Please assemble the roller shaft while facing flat face toward inside.
Push the roller shaft inside and put the roller shaft cover on it. Assure that the roller ass'y dosen't

take off from the ion air turbine brush while pulling it with your fingers.

(2)How to replace roller ass'y(R)

Undo the screw and the roller shaft cover, and take off the wasted roller ass'y(R).
Replace to new roller ass'y(R), return the roller shaft cover to original position and screw it.

2.5 How to replace the hose

(1)You can separate the control panel handset from the hose.
(2)Pull the hose pressing two claws clicked into the holes on both sides of the control panel handset.
(3)Remove the seal ring and the stopper ring from the hose end by turning the seal ring (left-handed

screw).

(4)As to removing the joint pipe assembly(40) from the other side's hose end, do it as same as the

control panel handset removal.

2

1

4

3

2

1

Seal ring Stopper ring

Control panel handset

Knob

Hose

Claws

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1) Empty the dust case before the dust reaches the
max line. If you continue using the cleaner with a full
dust case, the suction power will be decreased.

2) Empty the dust case periodically.

3) When emptying the dust case also remove the dust
around the filters.

1

Open the dust case cover while pressing
the button of dust case, and lift out the
dust case from cleaner body.

2

Put the dust case into a big vinyl bag, and press the open button in the bag.

Notes :
¡When you lift out the dust case from cleaner

body, be careful not to press the open button
of the dust case.

¡Do not lift out the dust case from the body

while the cleaner is in use.

¡The dust case should be kept upright when

removing it from the body to prevent dust
spillage.

How to dispose of the dust

Note :

¡Before you empty the dust case, be sure to turn off the power and

unplug the cleaner from the mains socket.

¡Turn the dust case downward and push the open button on the lid of the dust case to release

dust into a vinyl bag.

¡To remove stubborn dust adhesion inside the dust case, pat the side of dust case.
¡Dust around the mesh filter and under the mesh filter can be removed with tissue paper and

an old toothbrush.

Notes :
¡Some types of dust may cause the suction power to become weak before max line is reached, in that

case, empty the dust and clean the filters.

¡If the rug & floor nozzle sucks some sharp items such as pieces of broken glass, pins, take care not to

touch them.

6

3.How to empty the dust case

Max line

Dust
case

Dust case

Open button
for lid of dust
collection case

Button for the
dust case

Transparent
case cover

Dust
case

Open button
for lid of dust
collection case

Tissue
paper

Dust

The lid of dust case

Under mesh
filter

mesh
filter

The lid of
dust case