Sharp R-23AM Manuel de service Page 1

R-22ATR-23AMR-24ATSHARP CORPORATION SERVICE MANUALSX910R24ATK//COMMERCIALMICROWAVE OVENMODELSR-22ATR-23AMR-24ATIn interests of user-safety the oven s

8R-22ATR-23AMR-24AT“ . “ does not appear on display when power cord is plugged into wall outlet.Control panel can not accept key in.Fuse F2 F6.3A

9R-22ATR-23AMR-24ATA MAGNETRON TESTTEST PROCEDURESPROCEDURELETTER COMPONENT TESTCARRY OUT 3D CHECKS.Isolate the magnetron from high voltage circuit by

10R-22ATR-23AMR-24ATRoom temperature ... T0 = 21°CInitia

11R-22ATR-23AMR-24ATTEST PROCEDURESPROCEDURELETTER COMPONENT TESTB HIGH VOLTAGE TRANSFORMER TESTWARNING: High voltage and large currents are present

12R-22ATR-23AMR-24ATF FUSE F3, F4 M8A TESTCARRY OUT 3D CHECKS.If the fuses F3 and/or F4 M8A are blown, there could be shorts in the high voltage trans

13R-22ATR-23AMR-24ATTEST PROCEDURESPROCEDURELETTER COMPONENT TESTJ MONITOR RESISTOR R1 TESTCARRY OUT 3D CHECKS.Disconnect the leads from the monitor r

14R-22ATR-23AMR-24ATTEST PROCEDURESPROCEDURELETTER COMPONENT TESTThe touch control panel consists of circuits including semiconductors such as LSI, IC

15R-22ATR-23AMR-24ATSwitches Terminals Released DepressedSW1 F1 - F4 O.C. S.C.SW2 F1 - F5 O.C. S.C.SW3 F2 - F4 O.C. S.C.SW4 F2 - F5 O.C. S.C.SW5 F3 -

16R-22ATR-23AMR-24ATTo protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on thePWB, this foil patt

17R-22ATR-23AMR-24ATThis AC voltage is the input to the IN3 and IN5 ports ofIC1, which determines if there is a magnetron / highvoltage problem.Figure

R-22ATR-23AMR-24ATREMEMBER TO CHECK 3D1) Disconnect the supply.2) Door opened, and wedged open.3) Discharge high two voltage capacitors.WARNING: AGAIN

18R-22ATR-23AMR-24ATCONTROL PANEL ASSEMBLY FOR R-23AMOUTLINE OF CONTROL PANELThe control section consists of the following units asshown in the contro

19R-22ATR-23AMR-24ATPin No. Signal I/O Description2 IN7 IN Temperature measurement input: MAGNETRON THERMISTOR AND OVENTHERMISTOR (2).By inputting DC

20R-22ATR-23AMR-24AT25 P30 OUT Terminal not used.26 CNVSS IN Connected to Vc.(-5V)27 RESET IN Auto clear terminal.Signal is input to reset the LSI to

21R-22ATR-23AMR-24AT45 P11 OUT Segment data signal. Signal similar to P17.Key strobe signal.Signal applied to touch-key section. A pulse signal is inp

22R-22ATR-23AMR-24ATPin No. Signal I/O Description5-6 AN7-AN6 IN Terminal to switch the specification.7 AN5 IN Connected to GND.8 AN4 IN A/D input for

23R-22ATR-23AMR-24AT28-29 P71-P70 OUT Terminal not used.30 XIN IN Internal clock oscillation frequency setting input.The internal clock frequency is s

24R-22ATR-23AMR-24AT2-2 Memory IC (IC2) FOR R-24AT / R-22ATAT24C04 is a 4K-bit, serial memory, enabling CMOS to be erased/written electrically. This m

25R-22ATR-23AMR-24ATapprox. 1M ohmSERVICINGcontrol panel with a jumper, which brings about anoperational state that is equivalent to the oven door bei

26R-22ATR-23AMR-24ATPROCEDURE FOR ENTERING TO IC-2 FOR R-24AT / R-22ATWhen the control unit or IC-2 is exchanged, re-enter theconstans of EXPRESS DEFR

27R-22ATR-23AMR-24ATPAD ORDER DISPLAY PHONE(Door close) •SET •SET "NUMBER" •(within 2 sec.)1 NUMBER 1 • 05 NUMBER 1 • 5SET "NUMBER"

1R-22ATR-23AMR-24ATSERVICE MANUALCOMMERCIALMICROWAVE OVEN R-22AT/ R-23AM/ R-24ATGENERAL IMPORTANT INFORMATIONThis Manual has been prepared to provide

28R-22ATR-23AMR-24AT1. Disconnect the oven from power supply.2. Make sure that a definite “click” can be heard when themicrowave oven door is unlatche

29R-22ATR-23AMR-24AT4. Remove the wire lead(s) of high voltage transformer(s)from the wire holder.5. Pull out the wire lead(s) of high voltage transfo

30R-22ATR-23AMR-24ATSTIRRER MOTORS (UPPER AND LOWER) REMOVAL1. CARRY OUT 3D CHECKS.2. Remove the rear cabinet, too.3. Disconnect the wire leads from t

31R-22ATR-23AMR-24ATTERMINAL INSULATOR REPLACEMENTCONTROL PANEL ASSEMBLY REMOVALThe complete control panel should be removed for re-placement of compo

32R-22ATR-23AMR-24AT2. When inserting key cable to main body set,ensure them free from caught-in trouble. Inaddition, when installing the control pane

33R-22ATR-23AMR-24AT1. Loosen the two (2) screws holding the latch hook.2. With the door closed, adjust the latch hook by movingit back and forward, o

34R-22ATR-23AMR-24ATaround door with an approved microwave survey me-ter. (Refer to Microwave Measurement Procedure.)Note: The door on a microwave ov

35R-22ATR-23AMR-24ATMICROWAVE MEASUREMENTBefore commencing the test, check that the leakagedetector is functioning and adjusted according to themanufa

36R-22ATR-23AMR-24ATFigure O-2 Oven Schematic-IDLE Condition (Door opened condition)SCHEMATICNOTE: CONDITION OF OVEN1. POWER SUPPLY CONNECTED AND/OR 1

37R-22ATR-23AMR-24ATSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. MANUAL/ REPEAT KEY TOUCHED [R-22AT/24AT].3. COOKING TIME PROGREMMED.4. START PAD

2R-22ATR-23AMR-24ATGENERAL INFORMATIONWARNINGTHIS APPLIANCE MUST BE EARTHEDIMPORTANTTHE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE F

38R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-1. Pictrorial DiagramBRNNOISE FILTERBLUNLF1:FUSE 13ASW5 : STOP SWITCH1 RED3 W

39R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-2. Control Panel Circuit (R-24AT)VPVREFIN7IN6IN5IN4IN3IN2IN1IN0P47P46P45P44P43P42P41P40P37P36

40R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-3. Control Panel Circuit (R-22AT)VPVREFIN7IN6IN5IN4IN3IN2IN1IN0P47P46P45P44P43P42P41P40P37P36

41R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-4. Control Panel Circuit (R-23AM)POWER%ON6G 5G 4G 3G 2G 1Gaa aabcdefghabcdefg1261F1FPNCNBLBUh

42R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board For R-24AT / R-22AT(ZD3)D3R80(J27, R6)(J25, R84)D4D1D21 3 (1) 5 (3) 9

43R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHFigure S-6. Printed Wiring Board For R-23AM(4) (5)1231DIP5164 333540455055603110511113573315 20 25 30

44R-22ATR-23AMR-24AT∆∆∆∆PARTS LISTNote: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in v

45R-22ATR-23AMR-24ATNote: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more th

46R-22ATR-23AMR-24ATHOW TO ORDER REPLACEMENT PARTSTo have your order filled prompty and correctly, please furnish the following information.1. MODEL N

47R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS7-167-167-267-224-202-44-30 7-297-187-267-256-117-187-334-397-137-187-187-144-22

3R-22ATR-23AMR-24ATAPPEARANCE VIEWOVEN1. Control panel2. Hole for safety door latches3. Ceramic floor4. Splash cover5. Oven light6. Air intake filter7

48R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHActual wire harness may be different from illustration.6-76-46-166-146-35-155-165-175-185-45-115-115-2

49R-22ATR-23AMR-24ATREF. NO. PART NO. DESCRIPTION Q'TY CODE3- 1 DPWBFB998WRU0 Control unit [R-24AT] 1 BN3- 1 DPWBFC005WRU0 Control unit [R-22AT]

50R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHR200 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AAR201 VRD-B12EF682J Resistor 6.8k ohm 1/4W 1 AA

51R-22ATR-23AMR-24AT3- 1 DPWBFC003WRU0 Control unit 1 BL3- 1A QCNCMA308DRE0 4-pin connector (A) 1 AC3- 1B QCNCMA312DRE0 3-pin connector (B) 1 AB3- 1C

52R-22ATR-23AMR-24AT3- 2-1 GMADIA067WRF0 Display window 1 AE3- 2-2 HDECAA206WRP0 Decorative metal fittings 1 AU3- 2-3 HPNLCB155WRF0 Control panel 1 BA

53R-22ATR-23AMR-24AT645123645123ABCDEFGHABCDEFGHCONTROL PANEL PARTSR-23AM3-2-33-2-43-2-23-2-13-23-13-43-193-93-43-83-63-203-213-33-153-223-53-173-183-

54R-22ATR-23AMR-24AT'99SHARP CORP. (11S0.520E) Printed in Germany.

4R-22ATR-23AMR-24ATOPERATION SEQUENCEthe two high voltage transformers. The voltage isconverted to about 3.3 volts A.C. output on the filamentwinding

5R-22ATR-23AMR-24ATpower, the line voltage is supplied to the high voltagetransformers T1+T2 intermittently within a 48 second timebase through the co

6R-22ATR-23AMR-24ATDOOR OPEN MECHANISM1. The door release lever is pulled.2. The upper latch head is lifted up by the linked doorrelease lever.3. The

7R-22ATR-23AMR-24ATcavity, the oven temperature fuse will open at 120˚C,causing the oven to shut down. The defective temperaturefuse must be replaced