Microwave Oven Service Manual Models CM109-CM209 This document has been published to be used for service only. The contents are subject to change without notice CONTENTS 1. SERVICING REQUIREMENTS HEALTH & SAFETY 1.1.1 Electrical Safety 1.1.2 Good Working Practices 1.1.3 Insulation Test 1.1.4 Sheet Metal Edges 1.1.5 Microwave emissions MEASUREMENT OF ENERGY EMISSION...
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4. TROUBLE SHOOTING GUIDE ERROR MESSAGE MICROWAVE OVEN DOESN’T WORK COOLING FAN PROBLEMS CONVECTION FAN PROBLEMS OVEN LIGHT PROBLEMS DISPLAY PROBLEMS DOOR HINGES PROBLEMS BAD COOKING PERFORMANCE 7. COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE MICROWAVE OVEN REMOVAL COOLING FAN MOTOR SUBSTITUTION OVEN DOOR REMOVAL CONVECTION FAN MOTOR SUBSTITUTION RING ELEMENT SUBSTITUTION...
Servicing Requirements Health & Safety Note: When servicing the oven, health and safety issues must be considered at all times. Specific safety issues are listed below with their appropriate icon. These are illustrated throughout the service information to remind service people of the health and safety issues 1.1.1 Electrical Safety WARNING! TO AVOID ELECTRIC SHOCK!
Servicing Requirements Measurement of energy emission CAUTION For microwave energy emission On every service call. A check for microwave energy emission must be made according to the following manner. 1.2.1 Measurement of energy emission Measurement must be made with the microwave oven operating at its maximum output and containing a load of 275±15 milliliters of tap water initially at 20°±5°...
Technical Overview Serial Plate 2.2.1 Location The product serial number plate is located on the bottom profile trim. 2.2.2 Model & Serial Number The numbers printed on the plate contains the following information: Model Serial Number Electrical ratings...
Technical Overview Components Specifications 2.3.1 Heating Elements Volts Freq. Watts Note Grill 1500 Ring (if present) 1500 2.3.2 Motors Volts Freq. Watts Note Convection Fan CL H 220-240 50/60 Cooling Fan CL H 220-240 50/60 Rotating Plate 2.3.3 Electric Components Volts Watts Note...
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Technical Overview System Description ELECTRONIC CONTROL. The control consists of a main power board and Full Touch Keyboard. COOKING MODE & TEMPERATURE SELECTION. The Microwave oven is full touch control for the set cooking modes and set temperature. TEMPERATURE SENSOR. There is one NTC sensor, fixed on the top of the internal cavity. MAGNETRON.
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Technical Overview Test procedure Microwave Control IMPORTANT: The MANUAL TEST procedure can be activated only after power on. To enter in the MANUAL TEST follow the following procedure: a) NEW CONTROL BOARD (unprogrammed): When the oven is plugged in to the power the language mode appears to the display Holding simultaneously the &...
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Hold key Grill: preset MAX; Verify the power of ring element (1500W); The following icons have to be turned on “cooking time” , “end cooking time” , bell , and & 6. During the microwave cooking functions the following parameters should be showed: Hold key the display shows “00:00”;...
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Technical Overview Fault Numbers Faults N° Temperature sensor disconnected or shorted. Err 1 Door micro switch open Err 2 Electronic boards over temperature (more than 85°C) Err 3 Electronic boards sensor temperature damaged Err 4 Flexible key board damaged Err 5...
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Technical Overview Oven Safety Features 2.7.1 Interlock Mechanism The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage. 2.7.2 Safety Thermostats This appliance is built with three bi-metal mechanical thermostats.
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Troubleshooting guide Error Message NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Microwave oven doesn’t work NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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High voltage Transformer is Measure the resistance Normal readings: damaged (Wire leads removed): a. Approx. 2 ohm. With an ohm-meter on R x1 scale. b. Approx. 170 ohms. a. Primary winding; b. Secondary winding; 7.12 Measure the resistance Normal readings: (Wire leads removed): a.
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resistance in both direction. Measure the continuity (Wire leads removed): Forward (Ohm-meter scale: Rx10000) Normal readings: Infinite. 7.16 Abnormal reading: continuity. Measure the continuity (Wire leads removed): Reverse (Ohm-meter scale: Rx10000) Safety Thermostat damaged Check for continuity of the thermostat’s contact with an Ohm-meter (Wire leads removed) 7.11...
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Troubleshooting guide Cooling Fan Problems NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Convection Fan Problems NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Oven Light Problems NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Display Problems NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Door Hinge Problems NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Troubleshooting guide Bad Cooking Performance NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. For about 60 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must wait to permit the capacitor discarding.
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Component replacement and adjustment procedure Oven removal Disconnect the power supply cord. Open the door. Remove the screws shown in the pictures. Pull off the oven. Remove the oven by using the lateral handles. Lateral Handles (if present)
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Component replacement and adjustment procedure Cooling fan motor substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Disconnect the terminals on the fan. Remove the five screws on the fan and remove the fan.
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User Manual Oven Door Removal To Remove Door To Replace Door Open the door completely. Insert the upper arms (2) of both hinges into the slots. The recesses (3) must hook on the lips (4). Lift up the hinge bracket (1) from the arms (2) . Move the hinge brackets (1) back down into position.
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Component replacement and adjustment procedure Convection fan motor substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper, rear and lateral covers. Disassemble the brackets by removing their three screws each (fig.1). Remove the back support by removing the last two screws on the top (fig.1).
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Component replacement and adjustment procedure Ring element substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper, rear and lateral covers. Disassemble the brackets by removing their three screws each (fig.1). Remove the back support by removing the last two screws on the top (fig.1).
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Component replacement and adjustment procedure Grill element substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal component cover (fig 1) by its six screws. Remove the probe from its location using a clamp make rounded the border to extract it.(fig.2).
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Component replacement and adjustment procedure Rotating Dish Motor Substitution Disconnect the power supply cord and remove the Oven from the cabinet. Open the door and remove the plastic insert (fig1). Put the oven with the door on a horizontal surface with a soft cloth to prevent scratching of the aesthetics.
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Component replacement and adjustment procedure Magnetron Substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal component cover (fig 1) by its six screws. Remove the cooling channel (fig 2) by its two screws.
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Component replacement and adjustment procedure Lock door switch substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper, rear and lateral cover . Disconnect the terminals of micro switch. Remove the plastic support performing the two movements as showed in the figure.
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Component replacement and adjustment procedure 7.10 Door Gasket substitution Open door and pull out the gasket by hands unhooking it by its 4 hooks on the corners. THE GASKET IS MADE BY A SPACIAL MATERIAL FOR MICROWAVE AND IT MUST BE FITTED PROPERLY. Replace with a new one by reversing the previous steps.
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Component replacement and adjustment procedure 7.11 Safety thermostats substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig 1) by its six screws. Unscrew and disconnect the thermostat damaged (fig.2).
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Component replacement and adjustment procedure 7.12 Transformer substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig 1) its six screws. Disconnect the cable of transformer damaged and unscrew it by 4 base screws.
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Component replacement and adjustment procedure 7.13 Condenser substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig 1) its six screws. Disconnect the cable of condenser damaged and unscrew it by 2 base screws.
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Component replacement and adjustment procedure 7.14 Probe Temperature substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig 1) by its six screws. Remove the probe from its location using a clamp make rounded the border to extract it (fig.2).
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Component replacement and adjustment procedure 7.15 Door hinges substitution Remove the Oven door following the section 7.3. Put the door on a flat surface with a soft cloth to prevent scratching of the aesthetics. Unscrew the door external glass A. Before to remove the hinges the hinge arm must be placed in the correct position following the steps (1 to 4) below.
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Component replacement and adjustment procedure 7.16 Diode substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig by its six screws. Disconnect the cable of diode damaged and unscrew it by its base screw.
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Component replacement and adjustment procedure 7.17 Filter substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the rear cover. Disconnect the cable from filter damaged and unscrew it by its base screws. (fig.1) Replace the new one by reversing the previous steps.
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Component replacement and adjustment procedure 7.18 Electronic Control board substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Disconnect the bad Control Board and remove it by its four plastic bracket. (fig.1) Replace the new one by reversing the previous steps.
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Component replacement and adjustment procedure 7.19 Fuse substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the internal components cover (fig 1) by its six screws. Open the fuse holder and remove the fuse damaged from the metal clamps (fig.2) Figure1...
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Component replacement and adjustment procedure 7.20 Door external glass substitution Remove the door from the oven section 7.3. Put the door on a flat surface with a soft cloth to prevent scratching of the aesthetics. Remove the external glass from the door unscrewing two screws on the corner (fig.1).
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Component replacement and adjustment procedure 7.21 Door middle glass substitution Remove the door from the oven section 7.3. Put the door on a flat surface with a soft cloth to prevent scratching of the aesthetics. Remove the external glass from the door Figure 1 unscrewing two screws on the corner (fig.1).
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Component replacement and adjustment procedure 7.22 Door internal labyrinth glass substitution Remove the door from the oven section 7.3. Put the door on a flat surface with a soft cloth to prevent scratching of the aesthetics. Remove the external glass from the door unscrewing two screws on the corner (fig.1).
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Component replacement and adjustment procedure 7.23 Door internal labyrinth glass gasket substitution Remove the door from the oven section 7.3. Put the door on a flat surface with a soft cloth to prevent scratching of the aesthetics. Remove the external glass from the door unscrewing two screws on the corner (fig.1).
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Component replacement and adjustment procedure 7.24 Glass Control panel substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper cover. Remove the Control Board without disassembling the cable. (section 7.18) Substitute the glass damaged by removal of the four screws on metal brackets. (fig.1) Replace the new one by reversing the previous steps mounting also a new plastic control board brackets.
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Component replacement and adjustment procedure 7.25 Light bulb substitution Disconnect the power supply cord and remove the Oven from the cabinet. Remove the upper, rear and lateral cover . Open the glass lens to access to bulb as showed (fig. Replace the new one by reversing the previous steps.
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