Sharp R-210AM User manual

210AM - 1
S3768R210AM//
R
SHARP CORPORATION
SERVICE MANUAL
TABLE OF CONTENTS Page
SERVICING....................................................................................................................................... 2
CAUTION, MICROWAVE RADIATION ............................................................................................. 3
WARNING......................................................................................................................................... 3
PRODUCT DESCRIPTION ............................................................................................................... 3
OPERATION DATA........................................................................................................................... 4
DOOR SWITCHES............................................................................................................................ 4
OUTPUT POWER TEST PROCEDURE ........................................................................................... 5
COMPONENT REPLACEMENT ....................................................................................................... 5
SCHEMATIC DIAGRAM ................................................................................................................... 7
WIRING DIAGRAM ........................................................................................................................... 8
PARTS LIST...................................................................................................................................... 9
EXPLODED ILLUSTRATION ............................................................................................................ 11
NEW FEATURE ................................................................................................................................ 14
In the interests of user-safety the oven should be restored
to its original condition and only parts identical to those
specified should be used.
MICROWAVE OVEN
MODEL
R-210AM
LOW
MED LOW MED
MED HIGH
HIGH
COOKING CONTROL
WITH COOK & DEFROST GUIDE
TIMER
5
30
20
10
15
25
2.0
1.0
1.5
0
COOK & DEFROST
GUIDE (KG)
0.5
E
800W

210AM - 2
Microwave ovens should not be used without a load. To test for the presence of microwave energy within a cavity,
place a cup of cold water on the oven turntable, close the door and set the microwave timer for one (1) minute, set the
powerleveltoHIGH(100%)andpushthestartkey.Whentheone(1)minutehaselapsed(timeratzero)carefullycheck
that the water is now hot.
AFTER REPAIR REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
When all service work is completed, and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test carried out.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F8A in the 1st latch switch - monitor switch
circuit, check the 1st latch switch and monitor switch before replacing the fuse F8A.
Sharp recommend that wherever possible, fault-finding is carried out with the supply disconnected. In some
cases, it may be necessary to connect the supply with the cover removed to carry out fault investigation in the
control circuitry. In such cases, the high voltage circuit should be disabled as described below to reduce the
hazards:-
• Carry out 3D checks (see above).
• Disconnect the supply leads from the high voltage transformer, making a note of the polarity. Insulate the
connectors, ensuring they are positioned away from the transformer and fastened there.
• Connect any relevant test equipment e.g. voltmeter.
• Reconnect the oven to the supply, then close the door.
• Note the results of the test, taking care to keep clear of the operational oven.
• Carry out 3D checks (see above).
• Reconnect the leads to the transformer. Take care to observe correct polarity.
• Carry out 4R checks (see below).
WARNING TO SERVICE PERSONNEL
SERVICING
Microwaveovenscontaincircuitrycapableofproducingveryhighvoltageandcurrent.Contactwithfollowingparts
will result in electrocution:-
High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier, High voltage harness.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING AGAINST THE CHARGE OF THE HIGH-VOLTAGE CAPACITOR
The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the high-voltage capacitor (that is, of the connecting lead of the
high-voltage rectifier) against the chassis using a screwdriver with an insulated handle.

210AM - 3
WARNING
Servicing and repair work must be carried out only by
trained service engineers.
The parts marked '*' on the parts list and schematic
diagram have voltages in excess of 250V.
Removal of the outer wrap gives access to potential
above 250V.
All the parts marked "∆" on the parts list may cause
undue microwave exposure, by themselves, or when
they are damaged, loosened or removed.
CAUTION
MICROWAVE RADIATION
Do not become exposed to radiation from the
magnetron or other parts conducting microwave en-
ergy. All input and output microwave connections,
waveguides, flanges and gaskets must be secured.
Never operate the device without a microwave en-
ergy absorbing load attached. Never look into an
openwaveguide or antenna while thedevice is ener-
gized.
SPECIFICATION
Power Requirements 230 /240 Volts 50 Hertz Single phase, 3 wire grounded
Power Consumption 1.3KW
Power Output 800 watts nominal of RF microwave energy (measured by way of IEC 705)
Operating frequency of 2450 MHz
Case Dimensions Width 449 mm Height 282 mm including foot Depth 369 mm
Cooking Cavity Dimensions Width 290 mm Height 194 mm Depth 313 mm
Turntable diameter 272 mm
Control Complement Mechanical Control System
Microwave Power for Variable Cooking
Repetition Rate :
HIGH.....................Full power throughout the cooking time
MEDIUM HIGH .....approx. 70% of Full Power
MEDIUM ...............approx. 50% of Full Power
MEDIUM LOW......approx. 30% of Full Power
LOW .....................approx. 10% of Full Power
Set Weight Approx. 13.3 kg
PRODUCT DESCRIPTION
CAUTION / WARNING
WARNING
THIS APPLIANCE MUST BE EARTHED. THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE
If the mains lead is replaced, only part number QACCBA030WREO should be used

210AM - 4
OFF CONDITION
Closingthedooractivatesalldoorinterlockswitches(moni-
tored latch switch and latch switch).
IMPORTANT
When the timer knob is at "0" the oven is in the OFF
condition.
Approx. 10% = 80 Watts
26 sec. ON
4 sec. ON
8 sec. ON
14 sec. ON
20 sec. ON
22 sec. OFF
18 sec. OFF
12 sec. OFF
6 sec. OFF
LOW
MEDIUM HIGH
MEDIUM
MEDIUM LOW
HIGH
Approx. 70% = 560 Watts
Approx. 50% = 400 Watts
Approx. 30% = 240 Watts
Approx. 100% = 800 Watts
HIGH, MEDIUM HIGH, MEDIUM, MEDIUM
LOW, LOW COOKING
When the microwave oven is preset for variable cooking
power,thelinevoltageissupplied tothepowertransformer
intermittently within a 32-second time base through the
relaycontactwhichiscoupledwiththecurrent-limitingrelay
(RY2). The following levels of microwave power are given.
SETTING
NOTE: TheON/OFFtimeratiodoesnotexactlycorrespond
to the percentage of microwave power, because
approx. 3 seconds are needed for heating up the
magnetron filament.
DOOR OPEN MECHANISM
Figure D-1. Door Open Mechanism
MONITORED LATCH SWITCH (SW1)
STOP SWITCH (SW3)
1. Whentheovendoorisclosed,thecontacts(COM-NO)
must be closed.
2. When the oven door is opened, the contacts (COM -
NO) must be opened.
MONITOR SWITCH (SW2)
1. Whentheovendoorisclosed,thecontacts(COM-NC)
must be opened.
2. When the oven door is opened, the contacts (COM -
NC) must be closed.
3. Iftheovendoorisopenedandthecontacts(COM-NO)
ofthemonitoredlatchswitch(SW1)failtoopen,thefuse
F8A blows simultaneously with closing the contacts
(COM - NC) of the monitor switch (SW2).
CAUTION: BEFORE REPLACING A BLOWN FUSE (F)
F8ATESTTHEMONITOREDLATCHSWITCH
(SW1), + MONITOR SWITCH (SW3) FOR
PROPER OPERATION.
OPERATING SEQUENCE
DOOR SWITCHES
LATCH HOOK
SW2: LATCH
SWITCH
SW1: MONITORED
LATCH SWITCH
SW3: MONITOR
SWITCH
LATCH
HEADS
OPEN LEVER
DOOR OPEN BUTTON
DOOR

210AM - 5
OUTPUT POWER TEST PROCEDURE
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.
Note: The result from this test should be within 10% of the power rating stated on the rating label.
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/m2 (equivalent to 5mW/cm2), 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
COMPONENT REPLACEMENT
MONITORED LATCH SWITCH, LATCH
SWITCH, AND MONITOR SWITCH REMOVAL
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
Figure C-4. Switches

210AM - 6
COMPONENT REPLACEMENT
DOOR REPLACEMENT
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.
CHOKE COVER REMOVAL
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.
INNER DOOR FILM
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
Figure C-6. Door Assembly Replacement and
Adjustment
FLAT TYPE
SCREW-DRIVER
PROTECT BY TAPE
CHOKE
COVER DOOR PANEL
OUTER DOOR FILM
Removal
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
SCHEMATIC DIAGRAM
POWER TRANSFORMER
WITH 150°C THERMOSTAT
IN PRIMARY WINDING
MAGNETRON
H.V. RECTIFIER
CAPACITOR
0.91µ
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
0.0033µ/250V
BLU/18 BRN/18
F8A
FUSE
G-Y/18
10M/0.5W
VARI
SWITCH
SW3 - MONITOR SWITCH
TIMER
SWITCH
NL
0.0033µ/250V
680K/0.5W
0.22µ/250V
SW1
MONITORED
LATCH
SWITCH
SW2
LATCH
SWITCH
SURGE
RESISTOR
10/20W
SURGE
RELAY
SURGE
RELAY
CONTACT
N.C.
*
*
*
*

210AM - 8
Figure S-1. Pictorial Diagram
NOTE: Most of the terminals are Positive - Lock Type.
WIRING DIAGRAM
R E D
G R YSW1:
MONITORED LATCH SWITCH
COM.
TM: TIMER MOTOR
3
4
TC: THERMAL CUT-OUT 125°C (OVEN)
SW2: LATCH SWITCH
COM.
MG: MAGNETRON
FFA
H.V. WIRE B
HIGH VOLTAGE COMPONENTS
H.V. RECTIFIER
C: H.V. CAPACITOR
NEUTRAL
B L U
B R NG
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
NL
LIVE
NO
256
FM: FAN MOTOR TTM: TURNTABLE
MOTOR
GRY BLU BRN ORG
OL: OVEN LAMP R
E D
W
H
T
BRN
GRY
BLU RED
B
L
U
B
R N
W
H
T
W
H
T
R2: SURGE RESISTOR
G
R
Y
YLW
ORG
BRN
B
R N
R
E
D
1
BRN BRN
YLW
BLK
PNK
ORG
BLK
GRY
BLU
COM.
NC NO
NO
BRN
BLU
WHT
P
N
K
SURGE RELAY
O
R
G
B
L
U
G
R
Y
BLK BLK
B
L
K
SW3: MONITOR SWITCH

210AM - 9
Note: The parts marked “ *” are used in voltage more than 250V. The parts marked ∆may cause undue microwave exposure
“§” MARK: SPARE PARTS-DELIVERY SECTION
ELECTRICAL PARTS
REF NO PART NO S DESCRIPTION Q'TY CODE
4-1 DOVN-A439WRT0 U Oven cavity 1 BD
4-2 LBNDKA111WRP0 U Capacitor holder 1 AD
4-3 PHOK-A092WRF4 U Latch hook 1 AH
4-4 NFANJA029WRE0 U Fan blade 1 AK
4-5 PDUC-A638WRF1 U Fan duct 1 AE
4-6 LANGFA169WRP4 U Chassis support 1 AE
4-7 PPACGA126WRE0 U Seal packing 1 AC
4-8 MLEVFA078WRF0 U Open lever 1 AE
4-9 PCOVPA309WRE0 U Waveguide cover 1 AC
4-10 PDUC-A578WRF1 U Air intake duct 1 AD
4-11 GDAI-A280WRP2 U Base plate 1 AQ
4-12 PCUSGA308WRP1 U HVT cushion 2 AA
4-13 PSPAGA001WRE0 U Vibration Proof Cushion 1 AA
ELECTRICAL PARTS
REF NO PART NO S DESCRIPTION Q'TY CODE
1-1 RH-DZA008WRE0 U H.V. rectifier 1 AM *
1-2 FPWBFA308WRE0 U Noise filter 1 AQ
1-3 QACCBA030WRE0 U Power supply cord 1 AQ
1-4 RV-MZA270WRE0 U Magnetron 1 BG *∆
1-5 RC-QZA218WRE0 U High voltage capacitor 1 AS *
1-6 QSW-MA110WRE0 J Monitored latch switch 2 AK
1-7 QSW-MA112WRE0 J Monitor swith 1 AN
1-8 RMOTEA339WRE1 U Fan motor 1 AU
1-9 QFS-CA024WREO U Fuse F8A 1 AC
1-10 RLMPTA066WRE0 U Oven lamp 1 AK
1-11 FMOTDA056WRKO J Turntable motor assy 1 AR
1-12 RR-WZA023WRE0 J Surge resistor 0.8 ohm 20W 1 AK
1-13 RTHM-A078URE0 U Thermal cut-out 125°C (Oven) 1 AL
1-14 RTRN-A005UREO U Power transformer 1 BH *
1-15 RRLY-A042WRE0 U Surge relay 1 AS
CABINET PARTS
REF NO PART NO S DESCRIPTION Q'TY CODE
2-1 GCABUA001URP0 U Outer case cabinet (B) 1 AT ∆
2-1 GCABUA573WRT0 U Outer case cabinet (W) 1 AT ∆
2-1 GCABUA003URP0 U Outer case cabinet (G) 1 AT ∆
2-1 GCABUA009URP0 U Outer case cabinet (GL) 1 AT ∆
2-2 GLEGPA057WRE0 U Foot 2 AB
CONTROL PANEL PARTS
REF NO PART NO S DESCRIPTION Q'TY CODE
3-1 JKNBKA004URF0 U Timer Knob (B) 1 AE
3-1 JKNBKA556WRF0 U Timer Knob (W) 1 AE
3-1 JKNBKA009URF0 U Timer Knob (G) 1 AE
3-1 JKNBKA029URF0 U Timer Knob (BL) 1 AE
3-2 JKNBKA005URF0 U Vari Knob (B) 1 AE
3-2 JKNBKA555WRF0 U Vari Knob (W) 1 AE
3-2 JKNBKA007WRF0 U Vari Knob (G) 1 AE
3-2 JKNBKA027WRF0 U Vari Knob (BL) 1 AE
3-3 HPNLCA081URR0 U Control Panel (Printed) (B) 1 AN
3-3 HPNLCA080URR0 U Control Panel (Printed) (W) 1 AN
3-3 HPNLCA082URR0 U Control Panel (Printed) (G) 1 AN
3-3 HPNLCA097URR0 U Control Panel (Printed) (BL) 1 AN
3-4 QSWTEA121WRE0 U Timer/Vari unit 1 AZ
3-5 JBTN-A001URF0 U Open button (B) 1 AE
3-5 JBTN-B009WRF0 U Open button (W) 1 AE
3-5 JBTN-A011WRF0 U Open button (G) 1 AE
3-5 JBTN-A073WRF0 U Open button (BL) 1 AE
3-6 MSPRCA045WRE0 U Open button spring 1 AA
3-7 XEPSD30P10XS0 J Screw 2 AA
PART LIST

210AM - 10
PART LIST
Note: The parts marked “*” are used in voltage more than 250V. The parts marked ∆may cause undue microwave exposure
“§” MARK: SPARE PARTS-DELIVERY SECTION
DOOR PARTS
REF NO PART NO S DESCRIPTION Q'TY CODE
5 CDORFA075URK0 U Door assembly (B) 1 AZ ∆
5 CDORFA074URK0 U Door assembly (W) 1 AZ ∆
5 CDORFA076URK0 U Door assembly (G) 1 AZ ∆
5 CDORFA077URK0 U Door assembly (BL) 1 AZ ∆
5-1 FDORFA299WRT0 U Door panel assembly 1 AU
5-2 GCOVHA366WRF0 U Choke cover 1 AG
5-3 GWAKPA085URR0 U Door frame (B) 1 AQ ∆
5-3 GWAKPA084URR0 U Door frame (W) 1 AQ ∆
5-3 GWAKPA086URR0 U Door frame (G) 1 AQ ∆
5-3 GWAKPA091URR0 U Door frame (BL) 1 AQ ∆
5-4 PSHEPA560WRE0 U Outer sealer film 1 AE
5-5 LSTPPA158WRF0 U Latch head 1 AD
5-6 MSPRTA141WRE0 U Latch spring 1 AA
5-7 PSHEPA482WRE0 U Inner Sealer film 1 AH
5-8 XEBSD30P06000 U Self tapping screw 4 AA
SCREW, NUT AND WASHER
REF NO PART NO S DESCRIPTION Q'TY CODE
7-1 XEPSD30P10XS0 J Self tapping screw 1 AA
7-2 XHTSD40P08RV0 J Screw 4mm x 8mm 8 AA
7-3 XCPSD30P06000 U Self tapping screw 2 AB
7-4 Not applicable to this model
7-5 XFPSD40P06000 J Screw 4mm x 8mm 1 AA
7-6 XOTSD40P12RV0 J Screw 4mm x 12mm 12 AA
7-7 XOTSE40P12000 J Screw 4mm x 12mm (Chrome) 2 AA
7-7 XOTSF40P12000 J Screw 4mm x 12mm (Black) 2 AA
7-8 LXCZA063WRE0 U HVT screw 4 AA
7-9 XHPSD40P08K00 J Screw 1 AA
7-10 LX-CZA030WRE0 J Screw 1 AA
7-11 LX-NZA026WRE0 U M4 Nyloc nut 1 AA
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER 2. REF. NO.
3. PART NO. 4. DESCRIPTION
MISCELLANEOUS
REF NO PART NO S DESCRIPTION Q'TY CODE
6-1 FROLPA070WRK1 U Roller stay 1 AM
6-2 NTNT-A060WRE0 U Turntable 1 AN
6-3 TINS-A052URRO U Operation Manual/Cookery book 1 AM
6-4 QW-QZA191WRE0 U H.V. wire A 1 AF *
6-5 QW-QZA001URE0 U H.V. wire B 1 AE *
6-6 FW-VZA027UREO U Main wire harness 1 AT
6-7 TCAUHA001WRR1 U Caution label 1 AC