Panasonic H665 Microwave Oven User Manual
Contents
1. SMALL LAMP RESIST RICE COOKING NEON LAMP INPUT LAMP RESIST KEEP WARM NEON LAMP SWITCH Cord Bush MICA HEATER ASS Y SCHEMATIC DIAGRAM SR GA281 WIRING DIAGRAM SR GA281 TE Cast Heater Gray Blue Lamp Resistor Rice Cooking Neon Lamp Input Lamp Resistor Keep Warm Neon Lamp Green L Switch Brown Mica Heater Ass y SR GA421 SR GA281 SR GA721 1 SCHEMATIC DIAGRAM amp WIRING DIAGRAM SCHEMATIC DIAGRAM SR GA721 WIRING DIAGRAM SR GA721 Cord Wire Earth Green Blue N hal 2 1 L Brown CAST HEATER BIG LAMP RESIST RICE COOKING NEON LAMP LAMP RESIST KEEP WARM NEON LAMP SWITCH MICA HEATER ASS Y Keep warm lamp lead Red Heater lead wire A Red Heater lead wire C Brown SR GA421 SR GA281 SR GA721 2 FUNCTION OF CENTER THERMOSTAT AND THERMALFUSE A Center Thermostat The center thermostat senses when the bottom of the rice cooker pan reach 134 C 6 C And it s action turns off the cooking cycle and starts the warming cycle Center thermostat construction Metal Cook switch button Magnet Inner spring 4 4 Cooking h ater d C Outer J spring Switch lever Rod Inner spring Figure 1 w E NC Cooking Position War2. 281 11 12 6 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA421 SR GA281 13 14 7 EXPLODED VIEW amp PACKING VIEW SR GA721 u uu u J J 15 16 8 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA721 17 18 WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death IMPORTANT SAFETY NOTICE There are special components used in this equipment which are important for safety These parts are marked by N in the Schematic Diagrams Circuit Board Diagrams Exploded Views and Replacement Parts List It is essential that these critical parts should be replaced with manufacturer s specified parts to prevent shock fire or other hazards Do not modify the original design without permission of manufacturer SR GA421 SR GA281 SR GA721 1 SCHEMATIC DIAGRAM amp WIRING DIAGRAM SCHEMATIC DIAGRAM SR GA421 WIRING DIAGRAM SR GA421 CAST HEATER T F
3. Foreign matter adhering Body dented or deformed Pan bottom dented or Heater surface deformed deformed or corroded Remove foreign matter Repair or replace body Replace pan Replace cooking heater by of screw driver etc and then polish with 320 water paper while wetting it with water B Forced application of current Chopstick wooden Switch lever deformed piece etc inserted onto or maladjusted causing cooking button continu continuous application of ous application of current current Inserted to prevent ear Repair or replace parts lier turning off Refer to cause in a above When fusion takes place check the cause set right the faulty section and be sure to use replacement parts 3 TROUBLESHOOTING GUIDE SR GA421 SR GA281 SR GA721 When receiving the cooker to be repaired be sure to always take charge of not only the cooker body but also the pan and the lid and ask for details as to the symptom of the trouble Furthermore when making troubleshooting of each part be sure to remove the power plug from the socket Cooking function Yes Cooking fails Cooking No continuity of cord lamp is not shown o Yes Y No continuity of thermal fuse 2 No No continuity of micro switch Y Y No Center thermostat is broken Checked evaporation test Switch lever properly adjust Cooking fails Cooking Yes lamp is not shown No continuity of sheat
4. ekses PACKING LIST MAL PACKING CASE 1 NEN INSTRUCTIONS UPPER PAD ASS Y ASR754A708 1 0 POLYETHYLENE SHEET ASR762T590 K RUST PROOF PAPER AQZ48T295 6 CORD PROTECTOR AQZ15T2951 LOWER PAD ASS Y ASR750A708 ROLLPAPER AQZ17T295
5. 21 SR GA281 PARTS LIST DBD RBD ern 95 2 s memwosmrassv maso esos 1 3 1 1 1 1 1 1 7 CASTHEATERASSY aqrzozeU 1 o P spares Kk 1 gt e a Co A HANDLE FOR BOBY AQE30T2941K0 BODY COMPLETE AQE13T2931WU AQE13T2931UG AQE13T2941WU AQE13T2941UG 8 1 NAME PLATE AQY50H299 UG AQY50S299 WU AQY50V299 WU AQY50M299 WU AQY50H300 WU AQY50H300 UG SWITCH ASS Y AQNOOH299WU AQNOOH300W9U 0 1 SWITCH PANEL AQN10T294 W9 3 DECORATIVE PANEL AQN21T294 W9 4 1 LAMP BOARD ASS Y AQN85T29310U 15 SWITCH LEVER COMP AQN30H299 0U 16 MICAHEATER ASS Y AQL70T29300U AQH20T2941WU 8 19 POWER CORD ASS Y AQQ00T29320U AQQ00H299 0U AQQ00H300 0U gt 42 2 R a 1 N 1 SR GA421 SR GA281 SR GA721 6 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA421 SR GA281 PARTS LIST Ref Part Name Part No SR GA421 SR GA281 DBD RBD LIST OF SCREW DBD RBD 212121212 A TAPPING SCREW 2 2 B semsscrew xyNs cioNs 1 1 1 a 1 L3 ow quy n D_ TAPPINGSCREW xr 4 4 4 4 4 4 E semsscrew 8 8 8 8 6 PACKING LIST DBD RBD rozmow _ j Ea ame E E E E E sA 4 PLASTIC SHEET ASR758 631 K 5 RUST PROOF PAPER ASR758T613B 021672931 p COR
6. D PROTECTOR AQZ15T2941 LOWER PAD ASR752T607 K SR GA421 SR GA281 SR GA721 7 EXPLODED VIEW amp PACKING VIEW SR GA721 EXPLODED VIEW m SR GA721 SR GA421 SR GA281 SR GA721 7 EXPLODED VIEW amp PACKING VIEW SR GA721 PACKING VIEW lt gt SR GA721 SR GA421 SR GA281 SR GA721 8 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA721 PART LIST Ref Part Name Part No SR GA721 SIN DBD SIN RBD LID AQB01T2951 1 1 298 MEASURING 295 THERMOSTAT ASS Y AQS00T295 0U CAST HEATER ASS Y AQL20T29510U AQL20M298 0U AQL20S298 0U BODY HANDLE AQE30T2951 B ODY COMPLETE AQE13T2951WU AQE13T2952U2U 0 NAME PLATE AQY50M298 WU AQY50S298 WU AQY50V298 WU AQY50A298 N9 11 SWITCH ASS Y AQN00M298W9U po AQNOOA298W9U SWITCH PANEL AQN10T295 W9 AQN21M298 LAMP BOARD ASS Y AQN85T29510U AQN85A29800U RICE COOKING LAMP AQN86T295 LEAD WIRE AQN86A298 MICA HEATER ASS Y AQL70T295 0U 1 maoa r HOLDER se carona k 5 17 SR GA421 SR GA281 SR GA721 8 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA721 LIST OF SCREW Ref Part Name Part No SR GA721 MAL TAPPING SCREW XTN4 10BVW P F HOLD SCREW XYN4 C10FNS SEMS SCREW XYN5 C10FNS XYN5 C10FNS O 5 wemascnew rasa 2 TAPPING SCREW 6 memmascnew
7. Order No PHAT070510C3 ervice Manual Automatic Rice Cooker SR GA421 SR GA281 SR GA721 EXPORT gt lt I SR GA421 SR GA281 SR GA721 Specification mem em m HK SIN DBD SIN RBD MALAYSIA MALAYSIA SIN DBD SIN RBD 220 V 50 Hz 230 V 50 Hz 220 V 50Hz 240V 50Hz 220 V 50 Hz 240 V 50 Hz 230V 50Hz 220 V 50Hz 208 V 60 Hz Power Cooking 1400 W 950 W 2500 W consumption Warming 47 5 W Cooking capacity 5 23L 5 15L 3 7L Center thermostat working temperature AE Keep warm temperature More than equal to 80 C After 1 Hr keep warm Thermal fuse specification 113 169 C Dimension mm 367 Width x Depth x Height 429 x 369 x 300 x 295 248 x 247 x 255 x 305 Weight 5 5 kg 3 6 kg 10 1 kg Power Cord approx 1 0m Specification subject iB change without notice 2007 Panasonic Home Appliance Thailand Co Ltd All rights reserved Unauthorized copying and distrbution is a violation of law Panasonic SR GA421 SR GA281 SR GA721 CONTENTS Page 1 SCHEMATIC DIAGRAM amp WIRING DIAGRANMN 3 4 2 FUNCTION OF CENTER THERMOSTAT AND THERMAL FUSE 5 6 S TROUBLE SHOOTING GUIDE U u u uuu u 7 8 4 TESTING PROCEDURE U U U u u u uuu u u u aaa 9 10 5 EXPLODED VIEW amp PACKING VIEW 421 5
8. after water of the pan bottom has evaporated is within 1 minute before and after the cooking switch is turned off If these requirements are not satisfied check the center thermostat as well as the contacted condition between the pan bottom and the cooking heater and then repair or replace the parts Pan viewed from above Pan flange section Holes of Tissue paper SR GA421 SR GA281 SR GA721 4 TESTING PROCEDURE 3 Boiling control lever adjustment Such a mechanical operation as center thermostat goes up and down is used to turn on and off the micro switch Check and adjust this relationship as shown below When the boiling switch is turned on When the boiling switch is turned off Micro switch Auxiliary lever Auxiliary lever Checking The auxiliary lever presses the push The auxiliary lever does not press button The WARM lamp comes on the push button The lamp comes on Adjusting To gain the above relationship adjust the auxiliary lever by bending it with long nose pliers SR GA421 SR GA281 SR GA721 5 EXPLODED VIEW amp PACKING VIEW SR GA421 SR GA281 SNS Soy sasaqa GW m ee EXPLODED VIEW SR GA421 SR GA281 SR GA421 SR GA281 SR GA721 5 EXPLODED VIEW amp PACKING VIEW SR GA421 SR GA281 PACKING VIEW SR GA421 SR GA281 A SR GA421 SR GA281 SR GA721 6 REPLACEMENT OF PARTS LIST amp PACKING LIST SR GA4
9. arming fails Warm lamp Yes shown No continuity of warming heater Replace warming heater SR GA421 SR GA281 SR GA721 4 TESTING PROCEDURE 1 Bubbling test Input the pan in the main body and lightly rotate the pan clockwise and counter clockwise to set the pan on the heating plate properly 1 Fill water until the center area of the pan bottom is dipped and close the lid Then turn on the boiling switch 2 When it beings boiling to produce steam remove the lid and immediately check the bubbling condition on the pan bottom 3 Bubbling condition is shown in figure 3 A Bubbles generate through out the circumference of the pan bottom Proper B Bubbles does not generate on more than one quater part of the pan bottom s felgsM Improper v Water Level Y Sheathed heater Center thermostat Figure 2 Figure 3 If it is improper it may result from the insfficient contact between the pan bottom and the sheathed heater Check the pan bottom and the sheathed heater for foreign material remained Clean up the foreign materials or replace the parts 2 Evaporation test 1 After satisfactory bubbling is confirmed remove the lid and put a weight on the cooker 2 Cover the entire pan bottom with 2 or 3 pieces of tissue paper or gauze and turn on the switch subsequently 3 The cooker is considered acceptable if the timing when steam generation comes to a stop
10. hed heater Thermal fuse blown Yes Forced application of current Rice burns Brown color Yes No Yes Yes No Center thermostat defective Check with evaporation test No Switch lever has been properly adjusted Yes Yes Usage correct Rice is not rinced well enough Using with low rated voltage Too much water input for cooking Replace AC cord Locate cause for fusing and replace fuse Replace Frame ass y Replace center thermostat Adjust Switch lever Replace sheathed heater Explain correct usage Replace center thermostat Adjust Lever Explain correct usage SR GA421 SR GA281 SR GA721 3 TROUBLESHOOTING GUIDE Earlier Switching off Poor cooking finish Poor contact between pan and sheathed heater Check with bubbling test heater Too hard Too soft Half boiled Center thermostat defective Check with evaporation test Replace Center thermostat Switch lever has been properly adjusted Adjust switch lever Usage correct Too small or large in rice quantity Too small or large in water quantity Switched off once by hand in cooking process Switched off by shocks given in cooking process Rice not untied Explain correct usage Keep warm function Warming fails Warm lamp Micro switch change contact to NO Warm not shown mode after cooking is done Adjust switch lever W
11. lever and cause the auxiliary lever to depress the micro switch button This puts the micro switch in the warming position 2 When the pan is not in place within the rice cooker the center thermostat is not depressed a In this condition the outer spring is not compressed within the center thermostat preventing the metal from reaching its normal operating position b When the switch button is depressed the switch lever and auxiliary lever work as above but the magnet cannot come in contact with the metal to hold the switch lever in the cook position This happens because the switch lever hits the thermostat case and cannot push the rod with the magnet attached all they way up to meet with the metal c When the pressure is taken off the switch button the switch lever releases immediately to the open or warm positions SR GA421 SR GA281 SR GA721 2 FUNCTION OF CENTER THERMOSTAT AND THERMALFUSE Thermal Fuse The thermal fuse is used to open the circuit to the cooking heater when the temperature has gone unusually high This happens in cases such as incomplete contact between the heater and pan or if the switch buttons is forced to stay on keeping the heater energized abnormally This fuse is not a resetting device and must be replaced after openning Whenever replacing the fuse make sure the protective cover is placed over all exposed wiring Cause of Fusion A Improper contract between heater and pan Pan collar or deformed
12. ming or Off Position C Micro switch Refer to these figures showing the center thermostat construction and cooking position As the metal is heated its ability to be attracted by the magnet decreases Finally the inner spring pressure becomes stronger than the magnetic pull and the metal and magnet will pop apart The rod activates the switch lever which causes the auxiliary lever to press the micro switch button into the warming cycle B Switch On Preventive System Thermostat surface Inner spring 7777 Cooking ZZ Outer spring Magnet Thermostat case Cook switch button Auxiliary lever Micro switch Switch lever This is design to prevent the rice cooker from being turned on without the pan placed into position 1 Normally when the pan is inserted properly into the rice cooker the pan will depress the center thermostat The center thermostat outer spring will be compressed In this case when the switch button is depressed the following will happen a The auxiliary lever will release the micro switch button This puts the micro switch in the cook position b The switch lever will push the rod which will allow the magnet to meet with the metal c When the rice is cooked and the proper temperature has been reached 134 C 6 C the metal and magnet will pop apart as described in the center thermostat operation above d The rod will push the switch
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