DOWNLOAD Sharp R-210AM Service Manual ↓ Size: 205.96 KB | Pages: 16 in PDF or view online for FREE

210AM - 5

MICROWAVE OUTPUT POWER (IEC-705)

The power output of this oven is rated using the method specified by IEC-705.  Full details of how to carry out this
procedure can be found in the Sharp Technical Training notes which is available from Sharp Parts Centre
(part number SERV-LITMW01).

Using this procedure, the heating time to raise 1000g of water by 10

°

C is approximately 50 seconds.

The IEC-705 procedure must be carried out using laboratory-type procedures and equipment.  These requirements
make the procedure unsuitable for routing performance checks.  An indication of the power being produced by the oven
can however be obtained using the procedure given below.

Alternative simplified method:
1. Place 2 litres of cold water (between 12

°

C and 20

°

C) in a suitable container.

2. Stir the water and measure the temperature in 

°

C.  Note temperature as T1.

3. Place the container in the microwave and heat the water for 2 minutes on full power.
4. When the 2 minutes is completed, remove the container and stir the water.  Note the water temperature as T2.
5. Calculate the output power using the following formula:

R.F. Power Output = (T2 - T1) x 70.

MICROWAVE LEAKAGE TEST

This oven should be tested for microwave leakage on completion of any repair or adjustment, following the procedure
described in the Sharp Technical Training notes (part number SERV-LITMW01).  The maximum leakage permitted in
BS EN 60335-2-25 is 50W/m

2 

(equivalent to 5mW/cm

2

), however it is not normal to detect any significant leakage,

therefore, any leakage which is detected should be investigated.

It is essential that only leakage detectors with current calibration traceable to the National Physical Laboratories are used.

Suitable leakage detectors :

CELTEC A100
APOLLO X1

1.

CARRY OUT 3D CHECKS.

2.

Disconnect the leads from all switches.

3.

Remove the one (1) screw holding the latch hook to the
oven cavity.

4.

Remove the latch hook.

5.

Push the retaining tab slightly and remove the switch.

LATCH HOOK

SW2: LATCH 
          SWITCH

SW1: MONITORED
          LATCH SWITCH

SW3:  MONITOR
           SWITCH

Tab

Tab

Post

Post

Tab

Post

210AM - 6

1.

CARRY OUT 3D CHECKS.

2.

Remove choke cover taking care not to break
clips.

3.

Remove door assembly by lifting and easing
it forward.

4.

On re-installation make sure the door is
parallel with the bottom line of the oven face
plate and the latch head pass through the
latch holes correctly.

5.

CARRY OUT 4R CHECKS.

NOTE : After any service to the door, the

approved microwave survey meter should be
used to assure in compliance with proper
microwave radiation standards.

1.

Insert an iron plate (thickness of about 0.5mm) or
flat type screw driver to the gap between the choke
cover and door panel as shown figure to free the
engaged part.  The protect sheet may be used not
to damage the door panel.

2.

Lift up the choke cover, now the coke cover is free.

LATCH HEAD REMOVAL
1.

Remove the choke as above.

2.

Unhook the spring and lift the latch head clear.

3.

Replacement, the reverse of the above.

Removal
1.

Tear the door film from the door panel.

2.

Now the door film is free.

Installation
1.

Tear away the backing film.

2.

Put the pasted side of the door film on the door
panel.

Finger tab

Door film

Backing film

DOOR ASSEMBLY

OUTER CASE
CABINET

LATCH HEADS

FLAT TYPE
SCREW-DRIVER

PROTECT BY TAPE

CHOKE
COVER

DOOR
PANEL

1. Remove  the door film from the clips on the door frame.

Installation
1. Attach  the door film to the clips on the door frame.

Adhesive tape

Finger tab

Door film

Backing film

210AM - 7

ead clear.

ve.

l.

n the door

NOTE:

   INDICATES COMPONENTS
   WITH POTENTIALS ABOVE
   250V.

*

CIRCUIT SUBJECT TO
CHANGE
WITHOUT NOTICE.
DOOR CLOSED
COOK OFF
MICROWAVE CONDITION

POWER TRANSFORMER
WITH 150

°

C THERMOSTAT

IN PRIMARY WINDING

 MAGNETRON

H.V. RECTIFIER

    CAPACITOR
    0.91

µ

    2100V/AC*

EARTH

NOISE SUPPRESSION COIL

NOISE
FILTER
UNIT

OL

TTM

FM

TM

OVEN LIGHT

TURNTABLE MOTOR

FAN MOTOR

TIMER MOTOR  

OVEN
THERMAL
CUT OUT
125˚C

230/240V~50Hz

0.0033

µ

/250V

BLU/18

BRN/18

F8A
FUSE

G-Y/18

10M/0.5W

VARI
SWITCH

SW3 - MONITOR SWITCH

TIMER
SWITCH

N

L

0.0033

µ

/250V

680K/0.5W

0.22

µ

/250V

SW1
MONITORED
LATCH
SWITCH

SW2
LATCH
SWITCH

SURGE 
RESISTOR
10/20W

SURGE 
RELAY

SURGE
RELAY
CONTACT

N.C.

*

*

*

*

210AM - 8

NOTE: Most of the terminals are

Positive - Lock Type.

R

E

D

G

R

Y

SW1:

MONITORED 

LATCH

SWITCH

COM.

TM:

TIMER

MOTOR

3

4

TC:

THERMAL

CUT-OUT

125

°

C (OVEN)

SW2:

LATCH

SWITCH

COM.

MG:

MAGNETRON

FF

A

H.V. WIRE B

HIGH VOLTAGE COMPONENTS

H.V. RECTIFIER

C:

H.V.

CAPACITOR

NEUTRAL

B

L

U

B

R

N

G

I

Y

POWER

SUPPLY

CORD

E

A

R

T

H

B

L

K

R

E

D

H

.

V

W

I

R

E

T:

POWER

TRANS-

FORMER

R

E

D

NOISE 

FILTER

EARTH

ANGLE

N

L

LIVE

NO

25

6

FM: FAN MOTOR

TTM: TURNTABLE

          MOTOR

GR

Y

BLU

BRN

ORG

OL:

 O

VEN LAMP

R

E

D

W

H

T

BRN

GR

Y

BLU

RED

B

L

U

B

R

N

W

H

T

W

H

T

R2:

SURGE

RESIST

OR

G

R

Y

YL

W

ORG

BRN

B

R

N

R

E

D

1

BRN

BRN

YL

W

BLK

PNK

ORG

BLK

GR

Y

BLU

COM.

NC

NO

NO

BRN

BLU

WHT

P

N

K

SURGE

RELA

Y

O

R

G

B

L

U

G

R

Y

BLK

BLK

B

L

K

SW3:

MONIT

OR

SWITCH