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ORDER NO.PHAMOS0509034C3 Microwave Oven NN-G385MF ZPE(CIS Countries) SPECIFICATIONS 2005 Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. / All rights reserved. Unauthorized copying and distribution is a violation of law. PDF created with pdfFactory Pro trial version www.pdffactory.com...
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2. DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking control High Voltage Inverter Power Supply (U) controls output power by the signal from Digital Programmer Circuit (DPC). Power relay always stays ON, but PWM (pulse width modulation) signal controls microwave output power. NOTE: The ON/OFF time ratio does not correspond with the percentage of PDF created with pdfFactory Pro trial version...
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microwave power since approximately 2 seconds are required for heating of magnetron filament. Variable Power Cooking POWER SETTING OUTPUT MANUAL POWER(%) MICROWAVE DUTY APPROX. ON(SEC) OFF(SEC) HIGH 100% MEDIUM-HIGH MEDIUM MEDIUM-LOW DEFROST 2.2. Inverter power supply circuit [NEW H.V.] The Inverter Power Supply circuit powered from the line voltage, 220V 50Hz AC input supplies 4,000V DC to the magnetron tube, and functions in place of the H.V.
1. The digital programer circuit determines the power level and cooking time to complete cooking and indicates the operating state in the display window. Table shows the corresponding cooking times for respective serving by categories. Inverter Turbo Defrost SELECTED WEIGHT COOKING TIME 1.0 Kg 15 min.40 sec.
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The aluminum heat sink may be HOT due to heat energy, therefore, extreme care should be taken during servicing. H.V. Inverter warning WARNING FOR INVERTER POWER SUPPLY (U) GROUNDING Check the High Voltage Inverter Power Supply circuit grounding. The high voltage inverter power supply circuit board must have a proper chassis ground.
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Discharging the high voltage capacitors WARNING There is high voltage present with high current capabilities in the circuits of the primary and secondary windings, choke coil and heat sinkof the inverter. It is extremely dangerous to work on or near these circuits with the oven energized.
3.5. Avoid inserting nails, wire etc. through any holes in the unit during operation. Never insert a wire, nail or any other metal object through the lamp holes on the cavity or any holes or gaps, because such objects may work as an antennaand cause microwave leakage. 3.6.
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4.1. Magnetron 1. Discharge the high voltage capacitor. 2. Remove 1 screw holding air guide A on the magnetron. 3. Remove 1 screw holding reinforce bracket on the magnetron. 4. Remove 1 screw holding thermistor on the magnetron. 5. Disconnect 2 high voltage lead wires from magnetron filament terminals.
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Be sure to ground any static electric charge built up on your body before handling the DPC. 1. Disconnect all connectors from D.P.C. board. 2. Disconnect 1 grounding terminal from the oven cavity. 3. Disconnect connector CN701 from H.V. inverter. 4.
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4.3. Low voltage transformer and/or power relays (RY1, RY2) NOTE: Be sure to ground any static electric charge built up on your body before handling the DPC. 1. Using solder wick or a desoldering tool and 30W soldering iron carefully remove all solder from the terminal pins of the low voltage transformer and/or power relays.
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4.5. Door assembly 1. Remove door C from door E by carefully pulling outward, starting from upper right hand corner using a flat blade screwdriver. 2. Separate door E from tabs on door A and remove door A. 3. Remove door screen B from door A. 4.
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4.6. Turntable motor 1. Remove the motor cover by breaking off at the 4 spots indicated by arrows with a cutter or the like. NOTE: After removing the motor cover, be sure that cut portions are properly trimmed or bent to the inside so that no sharp edges will be exposed to outside.
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4.7. Quartz heater 1. Disconnect lead wires from heater terminals. 2. Remove 1 screw holding heater supports. 3. Remove the heater by pulling it out. 4.8. H.V. Inverter Power Supply 1. Remove the H.V. lead wire from magnetron terminals. PDF created with pdfFactory Pro trial version www.pdffactory.com...
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2. Disconnect 2 connectors from CN701 & CN702 on H.V. inverter (U). 3. Remove 1 screw holding grounding plate on the base. 4. Remove 1 screw holding inverter bracket on the base. 5. Slide 2 locking tabs of inverter bracket at the bottom of the base in direction of arrows.
5. COMPONENT TEST PROCEDURE CAUTION [NEW. H.V.] 1. High voltage is present at the high voltage terminal of the High Voltage Inverter (U) including aluminum heat sink during any cook cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage.
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which were connected to Inverter Power Supply (U). 3. Test the continuity of short switch with door opened and closed positions using lowest scale of the ohm meter. Normal continuity readings should be as follows. Door Opened Door Closed 5.3. Magnetron Continuity checks can only indicate an open filament or a shorted magnetron.
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DANGER HIGH VOLTAGE Test if failure codes of H95, H97 or H98 appear by doing the following procedure. It is recommended to use an AC line input current Ampere meter for testing. Test1 1. Program DPC. A. Tap [Reheat] pad once. B.
A. After approximately 3 seconds, oven stops. B. During oven operation, input current is approximately 0.4A. INPUT AMPERE FAILURE CODE Unplug CN701 <0.4A Oven stops in 3 seconds after started. If both a and b check OK, the Inverter Power Supply (U) can be determined to be OK. 5.6.
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6.2. Measurement of microwave output The output power of the magnetron can be determined by performing IEC standard test procedures. However, due to the complexity of IEC test procedures, it is recommended to test the magnetron using the simple method outlined below. Necessary Equipment: - 1 liter beaker - Glass thermometer...
TABLE (1L-1min.test) RATED OUTPUT TEMPERATURE RISE 800W Min.12.6°F(7.0°C) 7. TROUBLESHOOTING GUIDE DANGER HIGH VOLTAGES 1. DO NOT RE-ADJUST PRESET CONTROL on the H.V.Inverter (U). It is very dangerous to repair or without proper test equipment because this circuit handles very large current and high voltage. a misaligned inverter circuit is dangerous.
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SYMPTOM CAUSE CORRECTIONS 1. Oven is dead. Open or loose lead wire harness Check fan motor if thermal is defective. Open thermal cutout Fuse is OK. Open low voltage transformer No display and no operation Defective DPC at all. 2. No display and no operation Shorted lead wire harness Check adjustment of primary, at all.
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SYMPTOM CAUSE CORRECTIONS 5. Timer starts count down but Off-alignment of latch switches Adjust door and latch switches. no microwave oscillation. Open or loose connection of high (No heat while oven lamp voltage circuit especially magnetron and fan motor turn on) filament circuit NOTE: Large contact resistance will cause...
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7.3. Troubleshooting of inverter circuit (U) and magnetron [NEW H.V. This oven is programmed with a self diagnostics failure code system which will help for troubleshooting. H95, H97, H98, and H99 are the provided failure codes to indicate magnetron and inverter circuit problem areas. This section explains failure codes of H95, H97, H98, and H99.
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7.4. Simple way of H.V. Inverter/magnetron troubleshooting Purpose: Simple way (3/23 seconds rule) of identifying whether it’s Magnetron, Inverter, or others. Set-up: The unit under question is connected through the Ammeter as shown below. Procedure: Follow the matrix table below to identify the problem source. Note: Do not replace both Inverter board and Magnetron simultaneously and automatically without going through this procedure.
Power will: Ammeter reading is: To do: Remedy: Shut off in 23 1. Between 0.5A and 1.0A. Check and repair open Open magnetron wiring seconds after magnetron circuit between Inverter and “Start”. magnetron terminal. 2. Between 1.0A and 2.0A. Check continuity of D702 in Inverter PCB.
8.2. PARTS LIST NOTE: 1. When ordering replacement part(s), please use part number(s) shown in this part list. Do not use description of the part. 2. Important safety notice: Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacture’s specified parts.
Ref. No. Part No. Part Name & Description Pcs/Set Remarks F01577K10SZP NAME PLATE F10017K10XP BASE F10084T00AP RUBBER FOOT F110D6N60SXP CABINET BODY (U) F200A7K10XP OVEN (U) F20556S10XP COVER F21316E70XP PULLY SHAFT F2177-F80 WASHER F290D6S10XP ROLLER RING (U) F30206S10XP DOOR HOOK F31365Q00AP HOOK LEVER A F400A6S10XP FAN MOTOR...
Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30186S10XP DOOR KEY A F301A7K10SXP DOOR A F302K6S10XP DOOR E(U) F30216S10XP DOOR KEY SPRING F30856S10XP DOOR C F31455G10XN DOOR SCREEN A F30127K10KXP DOOR HANDLE F30216S10XP HANDLE SPRING 8.4. WIRING MATERIALS PDF created with pdfFactory Pro trial version www.pdffactory.com...
Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030A7K10ZP LEAD WIRE HARNESS F030E7K10ZP H.V. LEAD WIRE F03595G50XN LEAD WIRE (INCLUDING THERMISTOR) F030F7K10XP HARNESS B 8.5. ESCUTCHEON BASE ASSEMBLY PDF created with pdfFactory Pro trial version www.pdffactory.com...
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