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R-1870
R-1871
SUPPLEMENTAL SERVICE MANUAL
S91M173R1870E
OVER THE RANGE
MICROWAVE OVEN
MODELS R-1870/R-1871
Model R-1870
This is a supplemental Service Manual for Models R-1870/R1871.
This model is quite similar to Base Model R-1850 (S/M# S6804R1850X//).
Use this supplemental manual together with the Base Model Service Manuals for complete operation and service information
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specif
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R-1870 R-1871 PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary: (1) interlock operation (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hing
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R-1870 R-1871 WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage When the testing is completed, Before Serv
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R-1870 R-1871 MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven 2 should not exceed 1mW/cm at any point 5cm or more from the external surface of the oven, measured prior to acquisition 2 by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm at any point 5cm or more from the external surface of the oven. 2) Safety interlock switches: Primary interlock relay
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R-1870 R-1871 PRODUCT DESCRIPTION SERVICE MANUAL GENERAL INFORMATION MICROWAVE OVEN R-1870/R1871 OPERATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP TROUBLESHOOTING GUIDE AND MICROWAVE OVEN, R-1870 and R-1871. TEST PROCEDURE The models R-1870 and R-1871 are quite similar to base model R-1850 (Ref.# S6804R1850X//) TOUCH CONTROL PANEL It is recommended that service personnel carefully study the e
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R-1870 R-1871 SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 13.2 Amperes (Microwave), 13.2 Amperes (Convection) 60 Hertz Single phase, 3 wire grounded Power Output 850 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Convection Power Output 1400 watts Case Dimensions Width 29-15/16" Height 16-11/32" Depth 15- 9/32" Cooking Cavity Dimensions Width 17-1/8" Height 8-1/16" 1.1 Cubic Feet Depth 13-13/16" Hood lamp 2 bulbs, 30W x 2, Incandescent light bulbs Hood fan Ho
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R-1870 R-1871 Electrical Requirements The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG. The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more branch circuit, using a grounded receptacle. The receptacle should be located inside the cabinet directly above the Microwave Oven/Hood system mounting location. Grounded 3-Pronged Plug Receptacle Box Grounding Pin 3-Pronged Receptac
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R-1870 R-1871 OPERATION DESCRIPTION OF OPERATING SEQUENCE of the primary and secondary switch and secondary The following is a description of component functions interlock relay and is mechanically associated with the during oven operation. door so that it will function in the following sequence. (1) When the door opens from a closed position, the OFF CONDITION secondary interlock relay, door sensing switch, primary Closing the door activates the door sensing switch and and secondary switch ope
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R-1870 R-1871 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. FUSE MAGNETRON 20A TEMPERATURE FUSE BLK COM. N.O. CONTROL UNIT RY1 RY2 BLK BLK BLK C3 AH SENSOR HOOD FAN POWER THERMAL TRANSFORMER C9 CUT OUT RY9 BRN NOISE RESISTOR C5 RY10 GRN RY6 RY5 RY4 RY7 RY1 BLU C7 F1 F2 F3 PPL HOOD 120 V AC. GND CAPACITOR 60 Hz RY8 N.O. COM. COM. N.O. E2 E5 E6 RY1 RY2 RY3 RY3 E1 E3 HOOD HIGH VOLTAGE A1 A3 C1 A5 B5 B3 B1 B7 E4 STM MOTOR CAPACITOR 0.9∝F DAMPER DOOR DM TTM THERMIS
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R-1870 R-1871 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CONVECTION PAD TOUCHED. 3. DESIRED TEMP. TOUCHED. 4. START PAD TOUCHED. FUSE MAGNETRON 20A TEMPERATURE FUSE BLK COM. N.O. RY1 CONTROL UNIT RY2 BLK BLK BLK C3 AH SENSOR HOOD FAN POWER THERMAL TRANSFORMER C9 CUT OUT RY9 BRN NOISE C5 RESISTOR RY10 GRN RY6 RY5 RY4 RY7 RY1 BLU C7 F1 F2 F3 PPL HOOD 120 V AC. GND CAPACITOR 60 Hz RY8 COM. COM. N.O. N.O. E2 E5 E6 RY2 RY3 RY1 RY3 E1 HOOD E3 HIGH VOLTAGE A1 A3 C1 A5 B5 B3 B1 B7 E4 STM MOT
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R-1870 R-1871 PROCEDURE COMPONENT TEST LETTER Note: When defective components, the Control Unit or Key Unit are replaced, the defective part or parts must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you. R KEY UNIT TEST If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon is making good contact, verify that the door sensing switch (stop switch) operates properly; tha
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R-1870 R-1871 2 45 6 1 3 A A B B C C D D E E F F G G H H 45 6 1 2 3 10 AH. SENSOR 3 WHT HOOD FAN MOTOR 2 RED CN-F 6 BLK 1 BLK 3 BLK YLW 5 RED BLK 6 BLK 4 RED YLW GRY 2 WHT 5 BLK 3 BLU WHT GRN 1 GRN Power Supply 4 WHT 2 cord 120V 60Hz PPL BLK CN-E 3 BRN GRY 1 BLU 2 GRN 1 PNK TEMPERATURE FUSE (MG.) N.O. STIRRER MOTOR GRN PNK R B GRN COM. WHT E L to oven cavity CONVECTION D K front flange DOOR SENSING SWITCH RY2: PRIMARY BLK MOTOR GRN INTERLOCK WHT RELAY GRN WHT HEATING BLK ELEMENT IC1 BLK Blue
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– R-1870 R-1871 6 2 45 1 3 A A B B C C D D E E F F G G H H 2 45 6 1 3 11 T1 CONTROL UNIT A5 1 5 NOTE 6 D1-D4 : 11ES1 : IF NOT SPECIFIEED, 1/4w ± 5% d 2 3 D1 D4 AC120V : IF NOT SPECIFIEED, 1SS270A Q4 b a 60Hz DTA123ES + + : IF NOT SPECIFIEED, 0.01∝F/16v – – 4 D2 D3 C10 0.1∝/50v c (VP) C100 Q1 2SB1238 R4 510 1/2w A1 MOTOR RUN R3 680 1w R90 100k CAPACITOR Q3 A3 KRA101M FLUORESCENT DISPLAY TUBE RY4 Q90 KRA101M TURNTABLE B1 MOTOR Q20 KRA101M F 1, 2 MIX CONV 31, 32 F DEFROST P1 4 RY5 FAN MOTOR B3 S
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R-1870 R-1871 PARTS LIST Note: The parts marked “∆∆∆∆∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION. REF. NO. PART NO. § DESCRIPTION Q'TY CODE ELECTRIC PARTS 1- 1 FH-DZB017MRY0 M High voltage rectifier assembly 1 AM 1- 2 RC-QZB234MRE0 M High voltage capacitor 1 AR 1- 3 QFS-TA013WRE0 M Temperature fuse 150½C 1 AG 1- 4 RHET-A174WRE0 M Convection heater 1 AZ 1- 5 RMOTDA211WRE0 M Turntable motor 1 AQ 1- 6 RMOTDA214WR
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R-1870 R-1871 REF. NO. PART NO. § DESCRIPTION Q'TY CODE D1-4 VHD11ES1///-1 J Diode (11ES1) 4 AB D20-32 VHD1SS270A/-1 J Diode (1SS270A) 13 AA D65 VHD1SS270A/-1 J Diode (1SS270A) 1 AA D70-76 VHD1SS270A/-1 J Diode (1SS270A) 7 AA IC1 RH-IZA719DRE0 J LSI 1 AW IC2 RH-IZA495DRE0 J IC 1AL Q1 VS2SB1238//-3 J Transistor (2SB1238) 1 AA Q3 VSKRA101M//-3 J Transistor (KRA101M) 1 AB Q4 VSDTA123ES/-3 J Transistor (DTA123ES) 1 AA Q20-26 VSKRA101M//-3 J Transistor (KRA101M) 7 AB Q27 VSKRC243M//-3 J Transistor (K
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R-1870 R-1871 REF. NO. PART NO. § DESCRIPTION Q'TY CODE 4-14 PHOK-B013MRF0 M Latch hook 1 AG 4-15 FANGTB003MRY0 M Unit mounting plate 1 AV 4-16 PFPF-B002MRE0 M Heat protect L 1 AK 4-17 PPIPFB002MRE0 M Coller 1 AD 4-18 PREFHB006MRP0 M Heater cover L 1 AM 4-19 PDUC-B083MRP0 M Hood intake duct L 1 AG 4-20 NFANPB005MRK0 M Fan blade 1 AC 4-21 GBDYRB002MRP0 M Back plate 1 AX 4-22 FDUC-B046MRK0 M Fan duct 1 AM 4-23 LBSHC0037WRE0 M Cord bushing 1 AB 4-24 FDUC-B050MRK0 M Exhaust duct 1 AK 4-25 MLEVPB016
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R-1870 R-1871 REF. NO. PART NO. § DESCRIPTION Q'TY CODE 6-11 FW-VZB077MRE0 M Main harness C 1 AH 6-12 TCAUAA041WRR0 M Caution label 1 AA 6-13 TCAUAB005MRR0 M DHHS caution label 1 AA 6-14 TCAUAB037MRR0 M Monitor caution label 1 AA SCREWS,NUTS AND WASHERS 7- 1 LX-BZA041WRE0 M Screw : 4mm x 8mm 1 AA 7- 2 XOTSF40P10000 M Screw : 4mm x 10mm [R-1870] 3 AB 7- 2 XOTSE40P10000 M Screw : 4mm x 10mm [R-1871] 3 AC 7- 3 XCBSD30P08000 M Screw : 3mm x 8mm 3 AA 7- 4 XBTSD40P08RV0 M Screw : 3mm x 6mm 2 AA 7-
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R-1870 R-1871 6 2 45 1 3 OVEN AND CABINET PARTS A A 1-17 4-1 7-25 4-49 7-24 7-7 7-24 4-48 B B 4-38 2-10 4-50 4-45 4-15 7-11 4-35 4-24 7-24 7-24 4-36 1-21 4-23 7-11 7-3 4-39 4-44 7-17 C 1-13 2-5 C 4-37 1-7 2-6 7-3 7-11 7-7 7-17 4-21 7-20 4-43 4-19 7-3 4-51 7-7 7-21 1-16 1-6 7-15 7-14 1-18 7-7 1-20 D D 1-3 7-23 1-4 4-17 7-1 7-14 4-9 7-20 4-10 7-4 4-4 4-18 2-9 6-13 4-7 1-15 1-2 4-11 4-12 E 1-1 E 4-42 1-9 7-1 7-12 7-25 7-13 7-12 4-8 4-22 4-20 4-16 4-52 7-19 7-6 1-11 7-22 4-40 1-10 4-13 4-33 4-14 7-9
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R-1870 R-1871 6 2 45 1 3 CONTROL PANEL PARTS A 3-2 A 3-3 3-4 3-1 3-2-2 3-2-6 DOOR PARTS 3-2-1 B B 4-34 7-7 3-4 5-9 5-4 3-2-5 3-2-4 C 5-6 C 5-1 3-2-3 5-9 5-5 D D 5 5-7 5-8 5-3 E E 5-2 MISCELLANEOUS 6-1 6-8 6-1-1 6-6 F 6-1-4 F 6-1-5 6-1-2 6-1-6 6-1-7 6-1-3 G G 6-9 6-10 6-11 H H 2 45 6 1 3 17
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R-1870 R-1871 PACKING AND ACCESSORIES 2-1 GREASE FILTER (x 2) 6-4 TOP TEMPLATE WALL TEMPLATE 6-5 6-2 INSTALLATION INSTRUCTION 6-7 COOK BOOK 6-3 OPERATION MANUAL 6-1 INSTALL MATERIAL ASSEMBLY TOP PAD 4-1 EXHAUST DAMPER ASSEMBLY 4-3 TURNTABLE TRAY DOOR PROTECTOR 6-10 WRAP COVER 6-9 ACCESSORY PACK BOTTOM PAD Non-replaceable items PACKING CASE 18
