description

FCC ID: PR46261X

Operational Description

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FCCID_283297

TECH SHEET - DO NOT DISCARD PAGE 1 Models: 665.62612200 665.62614200 Electrical Shock Hazard 665.62619200 Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. 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 check the magnetron, waveguide or operated with the door open. transmission line and cavity for proper alignment, integrity and connections. b. Make the following safety checks on all ovens to be serviced before activating the d. Any defective or misadjusted magnetron or other microwave source, and components in the interlock, monitor, make repairs as necessary: door seal, and microwave generation, 1. Interlock Operation and transmission systems shall be repaired, replaced, or adjusted by 2. Proper Door Closing procedures described in service manual 3. Seal and Sealing Surfaces (Arcing, before the oven is released to the owner. Wear & Other Damage) e. A microwave leakage check to verify 4. Damage to or Loosening of Hinges & compliance with the Federal Latches performance standard should be 5. Evidence of Dropping or Abuse performed on each oven prior to release c. Before turning on microwave power for any to the owner. service test or inspection within the f. Do not attempt to operate the oven if the microwave generating compartments, window area of the door is broken. POWER OUTPUT MEASUREMENT 2. Place the beaker in the center of the oven. The power output of the magnetron can be Operate on HIGH power level for measured by the following tap water 60 seconds. temperature rise test: 3. When done, stir the thermometer through ✔ Be sure oven cavity is clean and cool (not the water and record the temperature. used recently). 4. Subtract the cold water temperature from ✔ Low voltage will lower the magnetron output. the warm water temperature to get the temperature rise. Normal range is as 1. Fill a glass beaker with 1000 ml (32 oz.) of tap shown in the following table: water. Stir the water with a thermometer (digital recommended) and record the Voltage Temperature Rise temperature. This starting temperature should (VAC under load) °C °F be between 10°C (50°F) to 24°C (75°F). 120V 12 - 13 21 - 24 108V 10 - 11 18 - 19 FAILURE CODES/INDICATIONS Display Likely Failure Condition Recommended Repair Procedure Flashing After a power failure, the colon “:” will be flashing. Press any key to Power failure colon “:” end this indication. The colon will then be steady when in stand-by. -F2- Membrane switch failure Replace membrane switch. If problem persists, replace control board. -F6- Check wiring to relay 4903 for short circuits. If wiring is OK, replace Microwave relay failure control board. FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184729/4619-651-98211

INTERLOCK 14 OR FUSE SECONDARY 3B 15 W 20 AMP PAGE 2 2B 4R 13 GR 22 W H.V. 120V / 60Hz CL TRANSFORMER B DOWN OR / R MAGNETRON L FA G ELECTRONIC CONTROL BOARD OR / R G F W 4912 16 R22 N 4911 4906 4901 R Hood Night Cav Lt/ SCHEMATIC DIAGRAM TR1-5100 Turntable Light Light Door 37 R / W 4910 LFS MW Fan 2 1 Y/ W PART NO. 8184729/4619-651-98211 L.V.T. On/Off Prim. Sec. 4903 H.V. 4909 Microwave CAPACITOR Fan High/Low Relay Cavity Thermostat 1 N1 L1 HL FT HF2 HF1 P3 P4 TTM F/L Door NFS (TCO) 1 1 1 P2 GND H.V. 31 W 4P5 30 Y DIODE 13 GR 14 OR 16 R 7 BL 32 W 21 R 1 BL 38 Y/G 29 G HL HL Exhaust Fan 33 W Thermostat 2P5 1P5 UP 34 W 6 BR Cavity 5P5 12 B 1P0 B 5R 19 BL 11 W W 28 BR 20 BL Thermostat 2 26 W HF 10 BL BL 9Y Y TT 4R INTERLOCK 8R R MONITOR Magnetron INTERLOCK Motor Capacitor 5P0 PRIMARY 24 BL Thermostat DWG NO. MU-070 27 W 25 W 23 B 26 W CONDITION: DOOR OPENED B P0/P2/P3/P4/P5: CONNECTORS CL CAVITY LAMP W SYMBOL NOTES HF 1 BL BL HOOD FAN MOTOR B: BLACK W: WHITE BR: BROWN Y WIRE COLOR - BLUE BL: BLUE G: GREEN OR: ORANGE HL HOOD LAMP (COOKTOP LAMP) TT TURNTABLE MOTOR R WIRE NO. - 1 R: RED Y: YELLOW GR: GRAY TECH SHEET - DO NOT DISCARD FOR SERVICE TECHNICIAN'S USE ONLY

POWER CORD WHITE FUSE & FUSE SADDLE BLACK BLACK HIGH VOLTAGE COMPONENT UPPER INTERLOCK SUPPORT SECONDARY INTERLOCK GREEN SWITCH RED BLACK H.V. BLUE WHITE CAPACITOR F BLACK MAGNETRON CAVITY CAVITY WHITE ELECTRONIC CONTROL BOARD THERMOSTAT 2 FA THERMOSTAT 1 U1 EXHAUST FAN ORANGE THERMOSTAT WHITE BLUE BLUE RED WHITE P1 ORANGE/ RED ORANGE/ RED RED PICTORIAL DIAGRAM BROWN 5100 RED POWER H.V. TRANSFORMER LOWER INTERLOCK SUPPORT MONITOR ORANGE/ RED MOTOR TECH SHEET - DO NOT DISCARD INTERLOCK BLUE CAPACITOR BLACK SWITCH BROWN H.V. 1 WHITE DIODE YELLOW/ WHITE P2 4903 P4 1 2 RED WHITE BLACK FOR SERVICE TECHNICIAN'S USE ONLY 1 P3 WHITE 1 WHITE BROWN BLUE YELLOW/ WHITE RED MOTOR GRAY YELLOW HOOD FAN ASSEMBLY ORANGE PRIMARY BROWN WHITE WHITE BLACK BLACK WHITE INTERLOCK SWITCH MAGNETRON 1 1 THERMOSTAT BLUE WHITE WHITE BROWN BLUE 2 2 WHITE WHITE BLUE ORANGE GREEN 3 3 CAVITY LAMP & BROWN 4 4 YELLOW LAMP HOLDER BLACK RED 5 5 RED BLACK SIX POLES GRAY BROWN CONNECTOR RED RED YELLOW P0 WHITE 5 4 2 1 BLUE SIX POLES HOOD LAMP & 5 4 2 1 CONNECTOR P5 HOOD LAMP HOLDER GRAY WHITE WHITE WHITE BROWN WHITE ORANGE BLUE BLUE WHITE WHITE WHITE DWG NO. L-M1-070 WHITE WHITE WHITE TURNTABLE WHITE MOTOR BROWN GRAY WHITE ORANGE WHITE WHITE PART NO. 8184729/4619-651-98211 PAGE 3

PAGE 4 TECH SHEET - DO NOT DISCARD PICTORIAL DIAGRAM ELECTRONIC CONTROL BOARD U1 P1 5100 P2 1 4903 1 2 P4 1 P3 1 YELLOW COOKTOP LAMP WHITE INTERLOCK BLUE SECONDARY EXHAUST FAN THERMOSTAT RED TURNTABLE WHITE MOTOR HOOD FAN MOTOR BLACK WHITE H.V. TRANSFORMER INTERLOCK WHITE PRIMARY RED TURNTABLE MOTOR INTERLOCK ORANGE GREEN SECONDARY COOKTOP LAMP GRAY CAVITY LAMP BROWN EXHAUST FAN THERMOSTAT DWG NO. L-M1-071 PART NO. 8184729/4619-651-98211 FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 5 Cavity Thermostat 1 Hood Fan PARTS LAYOUT Opens at 165°C (329°F) Motor Assembly Not to Scale Closes at -35°C (-31°F) (8184825) Cavity Thermostat 2 (4393945) Opens at 125 C (257 F) Closes at -35 C (-31 F) (8184585) Motor Capacitor Cavity Lamp (8184091) (4393681) Line Fuse (4393308) Fuse Holder (8184312) Turntable Motor Magnetron (8184774) (8184827) Magnetron Thermostat Secondary Opens at 145°C (293°F) Interlock Switch Closes at 70°C (158°F) (4393697) (8184829) Hood (Cooktop) H.V. Transformer Lamps (4393681) (8184826) Monitor Interlock Switch (4393598) H.V. Capacitor (8169501) Primary Interlock Switch (4393599) H.V. Diode Touch Panel Exhaust (8184664) (Membrane Switch) PCB Fan Thermostat (WT 8184830) (Control Board) Opens at 45°C (113°F) (BK 8184831) Assembly Closes at 60°C (140°F) (BT 8184832) (8184834) (4393710) PRIMARY, SECONDARY, AND MONITOR INTERLOCK SWITCH CHECKOUT PROCEDURE Door Door Switch Check By Open Closed Disconnect the wires at the Primary Interlock Switch. Primary Interlock Check from the common terminal (White/Brown wires) to − + the normally open terminal (White wires). Disconnect the wires at the Secondary Interlock Switch. Check from the common terminal (Black wires) to the − + Secondary normally open terminal (White wire). Interlock Disconnect the wires at the Secondary Interlock Switch. Check from the common terminal (Black wires) to the + − normally closed terminal (Orange wire). Disconnect the wires at the Monitor Switch. Monitor Check from the common terminal (White/Blue wires) to + − the normally closed terminal (Red wires). (+) Continuity (–) No Continuity NOTE: These diagrams are not intended to show a complete circuit; they represent the position of switches during “DOOR OPEN” and “DOOR CLOSED” (continuity checks only). DOOR CLOSED DOOR OPEN L N L N (NC) (NO) (NC) (NC) (NO) (NC) (NO) (NC) (NO) (NO) (NC) (NO) SECONDARY MONITOR PRIMARY SECONDARY MONITOR PRIMARY INTERLOCK SWITCH INTERLOCK INTERLOCK SWITCH INTERLOCK SWITCH SWITCH SWITCH SWITCH FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184729/4619-651-98211

PAGE 6 TECH SHEET - DO NOT DISCARD TOUCH PANEL CONTINUITY DIAGRAM Example of use: PIN 9 10 11 12 13 When “Cook Time” is NO. selected, a resistance of 6 0 7 8 9 less than 200 ohms will be 1 observed between 3 and 11 on the flex circuit connector. 2 1 5 2 3 4 See diagram at right. Add Cook Hold Minute Time Power Warm 14 PIN FLEX CIRCUIT 3 CONNECTOR Auto Auto Auto Cook Reheat Defrost 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Beverage 1 5 Popcorn 6 Turntable Kitchen STOP Clock On/Off Timer Clear 7 START On/Night/Off High/Low/Off 8 ESD GROUND PLANE 14 14 TOUCH PANEL AND MICROCOMPUTER BOARD TEST The microwave hood combination is provided 2. Release the STOP/Clear button and then with a self-diagnostic routine that can be close the door. accessed through the touch key pad. To 3. Now, by pressing each button on the initiate this routine: control panel, the number 8 will appear in 1. Depress the STOP/Clear button while the display to indicate that the circuits are opening the door and while still depressing complete and all relays are working. the STOP/Clear button, unplug the NOTE: If the STOP/Clear button is pressed microwave oven for two seconds and plug it during this diagnostic routine, you will exit the back in. test mode. KEY TABLE FOR TEST MODE Key Name In Circuit Relay Digit* Key Name In Circuit Relay Digit* Popcorn - 1 7 - 1 Beverage - 3 8 4912 (Night Light) 3 Hold Warm - 5 9 4909 (Fan High/Low) 5 Auto Cook - 1 Clock Buzzer 1 Auto Defrost - 3 0 4910 (Fan On/Off) 3 Auto Reheat - 5 Kitchen Timer - 5 Cook Time - 1 START - 1 Power - 3 Turntable - 3 Add Minute - 5 On/Off 1 4901 (Cavity Light/Door) 1 (Fan) High/Low/Off - 2 2 4911 (Hood Light) 3 (Light) 3 4903 (MW) 5 - 4 On/Night/Off 4 - 1 See STOP/Clear - Text 5 - 3 4906 (Turntable) * The No. 8 will appear in the display position 6 5 4901 (Cavity Light/Door) indicated in the table. PART NO. 8184729/4619-651-98211 FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 7 TROUBLESHOOTING GUIDE Complete the following steps before 4. All testing must be done with an checking microwave circuitry: ohmmeter having a sensitivity of 20,000 ohms per volt DC or greater, and powered 1. Check the line voltage, household fuses or by at least a 9-volt battery. circuit breakers. 5. All operational checks using microwave 2. Check for loose wiring or miswiring within energy must be done with the microwave microwave. oven loaded with a minimum of 300 ml 3. Disconnect white wire from power transformer (10 oz.) of water in a microwave-safe and discharge high-voltage capacitor. container. MICROWAVE COOKING MICROCOMPUTER BOARD MOTOR CAPACITOR Y R FAN FAN ON HIGH/LOW Y CAVITY RELAY RELAY THERMOSTAT 2 N W W R 3P3 W B B BL BL BL 4P3 L1 FUSE LOW VOLTAGE CAVITY 20 AMP TRANSFORMER G BR THERMOSTAT 1 B R R BR W 1P2 3P2 B CAVITY LIGHT PRIMARY CAV LT/DOOR INTERLOCK B GR RELAY 4P4 SWITCH TURNTABLE (F/L) W MONITOR MOTOR SWITCH SECONDARY 2.7k-3.8kΩ INTERLOCK BL R TT MAGNETRON BL ON/OFF SWITCH TT 6P4 THERMOSTAT R RELAY W W B BL 2 1 MICROWAVE RELAY HIGH VOLTAGE SYSTEM BLOWER FAN TURNS ON AUTOMATICALLY MICROCOMPUTER BOARD MOTOR CAPACITOR Y R EXHAUST FAN THERMOSTAT FAN L1 FUSE HIGH/LOW Y CAVITY 20 AMP RELAY THERMOSTAT 2 B R R BL W W R N 2P3 3P3 BL B B BL BL W 4P3 HOOD FAN CAVITY MOTOR THERMOSTAT 1 79-119Ω (approx.) BLOWER FAN ON HIGH MICROCOMPUTER BOARD L1 FUSE LOW VOLTAGE 20 AMP TRANSFORMER BR B R R BR G 1P2 3P2 MOTOR CAPACITOR FAN Y R W CAVITY FAN ON HIGH/LOW Y RELAY RELAY THERMOSTAT 1 W W R N 3P3 BL B B BL BL W 4P3 HOOD FAN CAVITY MOTOR THERMOSTAT 2 79-119Ω (approx.) B: BLACK BL: BLUE BR: BROWN G: GREEN R: RED W: WHITE Y: YELLOW FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184729/4619-651-98211

PAGE 8 TECH SHEET - DO NOT DISCARD BLOWER FAN ON LOW MICROCOMPUTER BOARD L1 FUSE LOW VOLTAGE 20 AMP TRANSFORMER BR B R R BR G 1P2 3P2 MOTOR CAPACITOR Y R FAN Y FAN ON HIGH/LOW W CAVITY RELAY RELAY THERMOSTAT 1 W W R N 3P3 BL B B BL BL W 4P3 HOOD FAN CAVITY MOTOR THERMOSTAT 2 79-119Ω (approx.) MICROWAVE PLUGGED IN - TIME OF DAY DISPLAYED MICROCOMPUTER BOARD CAVITY L1 FUSE LOW VOLTAGE THERMOSTAT 2 N 20 AMP TRANSFORMER B R R BR G BR W BL W 1P2 3P2 CAVITY THERMOSTAT 1 DOOR OPEN - CAVITY LIGHT IS ON MICROCOMPUTER BOARD CAVITY L1 FUSE LOW VOLTAGE THERMOSTAT 2 N 20 AMP TRANSFORMER B R R BR G BR W BL W 1P2 3P2 CAVITY OVEN CAVITY LIGHT THERMOSTAT 1 CAV LT/DOOR RELAY B B GR 4P4 ACTIVATED BY OPENING AND F/L CLOSING MICROWAVE DOOR B: BLACK BL: BLUE BR: BROWN G: GREEN R: RED W: WHITE Y: YELLOW PART NO. 8184729/4619-651-98211 FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 9 COOKTOP LIGHT ON HIGH MICROCOMPUTER BOARD CAVITY L1 FUSE THERMOSTAT 2 LOW VOLTAGE N 20 AMP TRANSFORMER W B R R BR G BR BL W 1P2 3P2 W CAVITY HOOD W THERMOSTAT 1 LIGHT ON W RELAY Y W COOKTOP LIGHT 1P3 COOKTOP LIGHT ON LOW (NIGHT LIGHT) MICROCOMPUTER BOARD CAVITY L1 FUSE THERMOSTAT 2 LOW VOLTAGE N 20 AMP TRANSFORMER W B R R BR G BR BL W 1P2 3P2 W CAVITY NIGHT W THERMOSTAT 1 LIGHT ON W RELAY DIODE* Y W COOKTOP LIGHT * ALLOWS CURRENT TO FLOW 1P3 IN ONE DIRECTION ONLY. B: BLACK BL: BLUE BR: BROWN G: GREEN R: RED W: WHITE Y: YELLOW FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184729/4619-651-98211

PAGE 10 TECH SHEET - DO NOT DISCARD COMPONENT TESTS Discharge the high-voltage capacitor and Conduct a microwave energy test after remove the lead wires from the primary performing any tests or repairs to the winding of the high voltage transformer microwave. before conducting any of the following tests. Check that all wire leads are in the All operational checks using microwave correct position before operating the energy must be done with the microwave microwave oven. oven loaded with a minimum of 300 ml Grasp wire connectors when removing (10 oz.) of water in a microwave-safe the wire leads from microwave parts. container. COMPONENT TEST RESULTS H.V. 1. Remove wire leads. Transformer 2. Measure resistance (ohmmeter scale: Rx1): Primary winding - - Less than 0.5 ohm (approx.) Secondary winding - - 100 ohms (approximate) Filament winding - - 0 ohms 3. Measure resistance (ohmmeter scale: Rx1k): Primary winding to grounding - - Normal: Infinite Filament winding to grounding - - Normal: Infinite Magnetron 1. Remove wire leads. Check that the seal is in good condition. 2. Measure resistance (ohmmeter scale: Rx1): Filament terminal - - Normal: Less than 1 ohm 3. Measure resistance (ohmmeter scale: Rx1k): Chassis Filament to chassis - - Normal: Infinite H.V. Capacitor 1. Discharge capacitor. 2. Remove wire leads. 3. Measure resistance (ohmmeter scale: Rx1k): Terminal to terminal - - Normal: Momentarily indicates several ohms, gradually returns to Infinite Terminal to case - - Normal: Infinite H.V. Diode 1. Measure continuity (ohmmeter scale: Rx1k): Forward - - Normal: Continuity - Abnormal: Infinite (Some inexpensive 2. Measure continuity meters may indicate (ohmmeter scale: Rx1k): infinite resistance, both Reverse - - Normal: Infinite directions.) - Abnormal: Continuity CONTINUED ... PART NO. 8184729/4619-651-98211 FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 11 COMPONENT TEST RESULTS Turntable Motor 1. Remove wire leads. Digital Meter 2. Measure resistance (ohmmeter scale: Rx1k): - Normal: 2.7k - 3.8k ohms (approximate) COM - Abnormal: Infinite Hood Fan Motor 1. Remove wire leads. 2. Measure resistance (ohmmeter scale: Rx1): - Normal: For High Speed: Red and Blue wires 79 - 119 ohms (approximate) Blue and Black wires 22 - 43 ohms (approximate) For Low Speed: Red and Blue wires 79 - 119 ohms (approximate) Blue and White wires 43 - 62 ohms (approximate) - Abnormal: Infinite Thermostats NOTE: Refer to Parts Layout on page 5 for opening and closing temperatures. 1. Remove wire leads. 2. Cavity and Magnetron Cavity/ Thermostats: Magnetron Measure continuity Thermostat (ohmmeter scale: Rx1): - Normal: Continuity - Abnormal: Infinite 3. Exhaust Fan Thermostat: Exhaust Fan Measure continuity Thermostat (ohmmeter scale: Rx1): - Normal: Infinite - Abnormal: Continuity FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184729/4619-651-98211

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Document Created: 2002-09-18 09:38:33
Document Modified: 2002-09-18 09:38:33
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