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Order No. PHAT070510C3
Service Manual
Automatic Rice Cooker
SR-GA421/SR-GA281/SR-GA721
EXPORT
COOK
WARM
SR-928
Rice Cooking
Keep Warm
SR-GA421/SR-GA281 SR-GA721
Specification
Model
SR-GA421 SR-GA281 SR-GA721
Detail
Country HK SIN-DBD SIN-RBD MALAYSIA HK MALAYSIA SIN-DBD SIN-RBD USA
Power Source 220 V / 50 Hz 230 V / 50 Hz 220 V / 50 Hz 240 V / 50 Hz 220 V / 50 Hz 240 V / 50 Hz 230 V / 50 Hz 220 V / 50 Hz 208 V / 60 Hz
Cooking 1400 W 950 W 2500 W
Power
consumption
Warming 47.5 W
Cooking capacit
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SR-GA421/SR-GA281/SR-GA721 CONTENTS Page 1.SCHEMATIC DIAGRAM & WIRING DIAGRAM .....................................................................3-4 2.FUNCTION OF CENTER THERMOSTAT AND THERMAL FUSE .........................................5-6 3.TROUBLE SHOOTING GUIDE ...............................................................................................7-8 4.TESTING PROCEDURE .........................................................................................................9-10 5
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˚ ˚ 5 5 ± ± ˚ ˚ 0 1 0 1 SR-GA421/SR-GA281/SR-GA721 1. SCHEMATIC DIAGRAM & WIRING DIAGRAM SCHEMATIC DIAGRAM (SR-GA421) WIRING DIAGRAM (SR-GA421) CAST HEATER T .F . (BIG) N (SMALL) LAMP RESIST. RICE COOKING NEON LAMP E LAMP RESIST. INPUT Green KEEP WARM NEON LAMP SWITC H Silicone Tube (Blue) Cord Bush L MICA HEATER ASS’Y N Silicone Tube (Brown) Cord Wire Earth (Green) Silicone Tube (Green) Twist two time Switch Lead Wire (Blue) Lever Earth Lead Wire (Green) Thermal Fuse Wire (Brown) Lamp Lead Wi
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T . F . 2 T . F . 1 SR-GA421/SR-GA281/SR-GA721 1. SCHEMATIC DIAGRAM & WIRING DIAGRAM SCHEMATIC DIAGRAM (SR-GA721) CAST HEATER Blue N (SMALL) (MIDDLE) (BIG) LAMP RESIST. RICE COOKING NEON LAMP E LAMP RESIST. INPUT Green KEEP WARM NEON LAMP SWITCH L Brown MICA HEATER ASS’Y WIRING DIAGRAM (SR-GA721) Cord Wire Earth (Green) Keep warm lamp lead (Red) Cathode lead wire (Brown) Red Brown Grey Cord Wire Blue (N) Cord Wire Brown (L) Heater lead wire A (Red) Heater lead wire B (grey) Heater lead wire C
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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 Outer Cooking heater spring Switch lever Inner spring Rod NC Figure 1 Micro switch (Cooking Position) (Warming or Off Position) C Refer to these figure
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SR-GA421/SR-GA281/SR-GA721 2. FUNCTION OF CENTER THERMOSTAT AND THERMALFUSE C. 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 cove
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SR-GA421/SR-GA281/SR-GA721 3. TROUBLESHOOTING GUIDE 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. Symptom Diagnosis Remedy Yes Cooking function ● Cooking fails (Cooking No continuity of cord? ● Replace AC cord. lamp is not shown) No Yes ● Locate cause
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SR-GA421/SR-GA281/SR-GA721 3. TROUBLESHOOTING GUIDE Symptom Diagnosis Remedy ● Earlier Switching-off Yes ● Poor cooking finish Poor contact between pan and sheathed ● Replace pan or sheathed heater? (Check with bubbling test) heater. Too hard No Too soft Yes Half-boiled Center thermostat defective? ● Replace Center thermostat. (Check with evaporation test) No No Switch lever has been properly adjusted? ● Adjust switch lever. Yes Usage correct? ● Too small or large in rice quantity. ●
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40 cm. 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. Bu
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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. Checking The auxiliary lever presses the push- The auxiliary lever does not press button (The “WARM” lamp comes on.) the push-button (The “COOK” lamp comes on.) Adjusting
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SR-GA421/SR-GA281/SR-GA721 5. EXPLODED VIEW & PACKING VIEW (SR-GA421/SR-GA281) EXPLODED VIEW (SR-GA421/SR-GA281) 11
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SR-GA421/SR-GA281/SR-GA721 5. EXPLODED VIEW & PACKING VIEW (SR-GA421/SR-GA281) PACKING VIEW (SR-GA421/SR-GA281) 12
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SR-GA421/SR-GA281/SR-GA721 6. REPLACEMENT OF PARTS LIST & PACKING LIST (SR-GA421/SR-GA281) PARTS LIST Ref. Part Name Part No. SR-GA421 SR-GA281 No. Silver White White White White Silver HK SIN- SIN- MAL HK HK DBD RBD 1 LID ASS’Y AQB01T29310U 1 1 1 1 AQB01T29410U 1 1 2 LID HANDLE AQB10T2941K0 1 1 1 1 1 1 3 LID AQB01T293 1 1 1 1 AQB01T294 1 1 4 MEASURING CUP ASR792-454BK 1 1 1 1 1 1 5 ALUMINIUM PAN AQE50T293 1 1 1 1 AQE50T294 1 1 6 THERMOSTAT ASS’Y AQS00T293-0U 1 1 1 1 1 1 7 CAST HEATER ASS’Y AQL2
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SR-GA421/SR-GA281/SR-GA721 6. REPLACEMENT OF PARTS LIST & PACKING LIST (SR-GA421/SR-GA281) PARTS LIST Ref. Part Name Part No. SR-GA421 SR-GA281 No. Silver White White White White Silver HK SIN- SIN- MAL HK HK DBD RBD 20 CORD BUSHING ASR577Z658-K 1 1 1 1 1 1 21 SCOOP ASR796-454AK 1 1 1 1 1 1 22 CAUTION LABEL (BODY) ASR665T539-X 1 1 1 1 1 1 LIST OF SCREW Ref. Part Name Part No. SR-GA421 SR-GA281 No. Silver White White White White Silver HK SIN- SIN- MAL HK HK DBD RBD A TAPPING SCREW XTN4+10BVW 2 2
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SR-GA421/SR-GA281/SR-GA721 7. EXPLODED VIEW & PACKING VIEW (SR-GA721) SR-GA721 / U.S. EXPLODED VIEW (SR-GA721) 15
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SR-GA421/SR-GA281/SR-GA721 7. EXPLODED VIEW & PACKING VIEW (SR-GA721) PACKING VIEW (SR-GA721) 16
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SR-GA421/SR-GA281/SR-GA721 8. REPLACEMENT OF PARTS LIST & PACKING LIST (SR-GA721) PART LIST Ref. Part Name Part No. SR-GA721 No. White White White Silver MAL SIN-DBD SIN-RBD USA 1 LID ASS’Y AQB01T29510U 1 1 1 1QB01A298-0U 1 2 LID HANDLE AQB10T2941K0 1 1 1 1 3 LID AQB01T2951 1 1 1 AQB01A298 1 4 MEASURING CUP AQK00T295 1 1 1 1 5 PAN AQE50T295 1 1 1 1 6 THERMOSTAT ASS'Y AQS00T295-0U 1 1 1 1 7 CAST HEATER ASS'Y AQL20T29510U 1 1 AQL20M298-0U 1 AQL20S298-0U 1 8 BODY HANDLE AQE30T2951 2 2 2 2 9 BODY CO
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SR-GA421/SR-GA281/SR-GA721 8. REPLACEMENT OF PARTS LIST & PACKING LIST (SR-GA721) LIST OF SCREW Ref. Part Name Part No. SR-GA721 No. White White White Silver MAL SIN-DBD SIN-RBD USA A TAPPING SCREW XTN4+10BVW 2 2 2 2 B P.F. HOLD SCREW XYN4+C10FNS 4 4 4 4 C SEMS SCREW XYN5+C10FNS 1 1 1 1 XYN5+C10FNS 1 1 1 1 D TAPPING SCREW XTN4+8BFJ 2 2 2 2 E TAPPING SCREW XTN5+16BFJ 6 6 6 6 F SEMS SCREW XYN4+C7FNS 12 12 12 12 G TAPPING SCREW XTN4+20BFJ 2 2 2 2 H TAPPING SCREW XTN4+12AFJ 3 3 3 3 I TAPPING SCREW P
