Panasonic SR-TMG10 User manual

Order No. PHAT061123C3
(REVISION : AUG. 2011)
Service Manual
Electronic Warm Jar
SR-TMG10
SR-TMG18
Destination
Hong Kong
© Panasonic Home Appliances (Thailand) Co., Ltd. 2006.
All rights reserved. Unauthorized copying and distribution
is a violation of law.
There are special components used in this equipment which are important for safety. These parts are marked by
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.
IMPORTANT SAFETY NOTICE
Congee
Off
(3 hours)
SR-TMA18N
(1 hour)
The 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 within this service information by anyone
else could result in serious injury or death.
WARNING

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CONTENT
Page
3
4
5 - 7
8
8
9
9
10
11
12
12
13
14
15 - 17
18
1. Specification
2. Wiring Diagram
3. Troubleshooting Guide
4. Testing Procedure
4.1 Bubbling Test
4.2 Evaporation Test
4.3 Heat reserving Test
4.4 Hinge cover removal (Hinge Cover)
4.5 Inner enclosure and upper frame removal
4.6 Disassembly a control unit
4.7 Disassembly cast heater and thermostat case ass’y
4.8 Disassembly a side heater
5. Parts Exploded View and Replacement Parts List
5.1 Parts Exploded View : Body
5.2 Parts Exploded View : Packing
5.3 Replacement Parts List : SR-TMG10 / SR-TMG18
6. Detail Change Notice
SR-TMG10 / TMG18

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1. SPECIFICATION
MODEL
Power Source
Power Consumption Cooking
Warming
Plane Rice
Brown Rice
Mixed Rice
Sticky Rice
Porridge
Congee
Cake
Cooking Capacity
220V 50Hz
SR-TMG10
470W 650W
65W
0.18 ~ 1.0 L (1 cup ~ 5.6 cups)
0.18 ~ 1.0 L (1 cup ~ 3 cups)
0.18 ~ 1.0 L (1 cup ~ 4 cups)
0.18 ~ 1.0 L (1 cup ~ 3 cups)
Max 1.0 L (Rice 1/2 ~ 1 cup)
76W
0.54 ~ 1.8 L (3 cups ~ 10 cups )
Warming Capacity (Plane Rice) 0.18 ~ 1.0 L (1 cup ~ 5.6 cups) 0.54 ~ 1.8 L (3 cups ~ 10 cups )
248 x 247 x 255 (mm) 276 x 274 x 277 (mm)
2.5 Kgs. 3.1 Kgs.
Cooked rice warming Temperature
Temperature Detector
Thermal fuse Specification
Dimension (Width x Depth x Height)
Weight
Keep Warm
Power Cord (Approx.)
Accessories
* Specification subject to change without notice.
71°C ~ 79°C
Sensor thermistor
172°C 250V 10A
12 Hours
1.2 m.
Measuring cup, Scoop, Steaming basket
0.54 ~ 1.8 L (3 cups ~ 7 cups )
0.54 ~ 1.8 L (3 cups ~ 8 cups )
0.54 ~ 1.8 L (3 cups ~ 6 cups )
Max 1.8 L (Rice 1 ~ 2 cups )
Max 1.0 L Max 1.8 L
500 g. 650 g.
SR-TMG18
SR-TMG10 / TMG18

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2. WIRING DIAGRAM
SR-TMG10 / TMG18
PCB lead wire C (Red)
Thermal fuse lead wire A (Black)
Should be above thermal fuse
lead wire A and then goes
below terminal of side
heater lead wire D
Thermistor lead
wire (Red)
Sems screw lor
laternal wising
Thermostat earth lead wire (Green)
Therminal fuse lead wire B (Orange)
Side heater lead wire A (Blue)
PCB lead wire B (Black)
Side heater lead wire C (Black)
Side heater lead wire B (Blue)
Terminal shall not be higher than head of sems screw
Side heater lead
wire D (Red)
PCB lead wire A (White)
Body earth lead wire (Green)
Tapping screw for body earth lead wire
Hinge earth lead wire (Green)

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3. TROUBLESHOOTING GUIDE
Table 1
When receiving a rice boiler to be repaired, be sure to check that the main body is completely provide with the inner pan
and the inner lid, ask the condition (phenmenon) of the trouble in detail. Before troubleshooting single parts, be sure to
disconnect the power supply plug from the receptacle.
Condition
Rice boiling section
Plane rice / Brown rice
• Rice is not boiling.
(The indicating lamp
does not come on)
• Rice is not boiling.
(The indicating lamp
is lit)
Troubleshooting Remedy
Is the power cord conductive? • Replace the cord.
• Make sure insert therminal is
fasten.
• Replace the P.C.B. complete.
• Replace the P.C.B. complete.
• Replace the cast heater.
• Replace the center thermostat.
• Replace the inner pan or the
cast heater.
• Seeing at Table 2
• Explain the proper operation.
• Isolate the cause which melt
the thermal fuse, correct
the cause and
• Earlier cut off.
• Poor boiling up.
• Too hard
• Too soft
• Insufficient boiling
SR-TMG10 / TMG18
• Immediately after the switch is turned
off, open the cap.
• Rice is excessive or insufficient.
• Rice has not been scooped and mixed
well.
• Water is excessive or insufficient.
• The switch is turned off once during
boiling.
Is the pan bottom properly contacted with
the cast heater?
Yes
No
Is the thermal fuse conductive?
Yes
No
Is the therminal conductive?
Yes
Are the parts on the P.C.B. mistake?
Are the parts on the P.C.B. mistake?
Improper operation
No
Yes
No
Yes
Yes
Yes
No
Is the cast heater conductive?
Yes
No
Are the parts on the P.C.B. mistake?
(Check with the bubbling test).
Does the center thermostat operate
properly?
Yes
No
(Check with the operation test).
Yes

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SR-TMG10 / TMG18
Condition Troubleshooting Remedy
• Replace the center thermostat.
• Seeing at Table 2.
• Explain the proper operation.
• Excessive burning.
(More than light brown)
• The voltage is lower than specified.
• Rice is not washed sufficiently
• Water is excessive.
(Bran remains still)
• The pan bottom is conditioned to
generate burning easily.
Are the parts on the P.C.B. mistake?
Improper operation
No
Yes
Yes
Does the center thermostat operate
properly?
Yes
No
(Check with the evaporation test).

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Table 2
Condition
• Rice is not boiling.
(The indicating lamp
does not come on)
• Rice is not boiling.
• The thermal fuse is
blown off.
• Earlier cut off.
• Poor boiling up.
• Excessive burning.
(The indicating lamp
is lit)
• Heat is not reserved.
(The indicating lamp
does not come on)
• Heat is not reserved.
(The indicating lamp
is lit)
Troubleshooting Remedy
Is the transformer operating?
• Replace the P.C.B. complete.
• Replace the transformer.
• Replace the relay.
• Replace the relay.
• Replace the transformer.
• Replace the relay.
• Replace the relay.
SR-TMG10 / TMG18
No
Is the relay operation? No
Is the relay cut off?
Is the relay operation?
Yes
• Replace the P.C.B. complete.
Yes
No
• Replace the P.C.B. complete.
Yes
No
• Replace the P.C.B. complete.
Yes
• Replace the P.C.B. complete.
Yes
• Replace the P.C.B. complete.
Yes
Is the relay operation? No
Is the transformer operating? No
• Replace the transformer.
• Replace the P.C.B. complete.
Yes
Is the trial operating? No

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4. TESTING PROCEDURE
4.1 Bubbling test
Input the pan in the main body, lightly rotate the pan clockwise and counter clockwise to settle the pan on the
heating plate properly.
1. Fill water until center area of the pan bottom is dipped and close the lid. Then turn on the boiling switch.
4.2 Evaporation test
1. Check that bubbling is proper, open the lid and place a weight.
2. Fully cover 2 to 3 sheet of tissue paper (gauze is also applicable) on the pan bottom and continuously
flow electric current.
Note : To prevent plastic parts from deformation caused by steam, be sure to open the lid fully.
Note : To prevent tissue paper from floating because of bubbling, previously hole the paper.
3. Water on the pan bottom is completely evaporated to be empty. This timing is an follows :
Within 1 minute before the boiling switch is turned off.
Within 1 minute after the boiling switch is turned off.
Place a weight so that its gravity center may be aligned at the center
2. When it beings boiling to produce steam. Remove the lid immediately check the bubbling condition on
the pan bottom.
3. As show in the figture.
If it is improper, it may result from the insufficient contact between the pan bottom and heating plate.
Check the pan bottom and the heating plate for foreign material remainder. Clean off the foreign materials
or replace the parts.
Bubbles generate through out the circumference of the pan bottom...............................................Proper
Bubbles does not generate on more than one quater part of the pan bottom circumference..........Improper
SR-TMG10 / TMG18
Bubbling
5 cm
40 cm

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SR-TMG10 / TMG18
4.3 Heat reserving test
The above conditions are proper.
1. Put approx. 1 liter of water and the thermometer [ repairing tool (mercury thermometer ASN-150H) ]
in the pan, close the lid and turn on the boiling switch.
4.4 Hinge cover removal (Hinge cover)
1. Remove the dew collector.
2. Remove the hinge cover mounting screws.
3. As show in the figure, insert a narrow flat head screwdriver from just below and pry off the hinge cover.
2. When the beings boiling to generate steam turn off the boiling switch.
Within 69°C - 77°C .....................................Proper
If outside 69°C - 77°C, check triac mounting for irregularity, if it is proper, replace warming heater.
3. Add water or keep the lid opened until the reading of the thermometer falls to approx. 70°C.
4. When it becomes approx. 70°C, close the lid. After the warming heater is activated for 1 hour or more,
check the heat reserving temperature.
Top view of pan
Holes on the
tissue paper
Pan flange
Tissue paper
Mercury thermometer
Urethane foam blocks
Mercury thermometer
Inner Pan

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SR-TMG10 / TMG18
4.5 Inner enclosure and upper frame removal
1. As show in the figure, pry up three fastening hooks. Fixing the upper frame, turn the inner enclosure in
the arrow direction.
2. The upper frame will be seperated from the inner enclosure and the upper frame.
Note : When assembling, refer to the illustration without the position relationship between the inner
enclosure and the upper frame.