Panasonic SR-DE183 User manual

Order No. PHAT101101CE
(Revision : Jul. 2011)
Service Manual
Electronic Warm Jar
SR-DE103 / SR-DE183
SR-MS103 / SR-MS183
Product Colour
White (W)
Destination
Thailand, Hong Kong, Malaysia,
Singapore (RBD), Indonesia, PSV,
Singapore (DBD), Taiwan,
USA & Canada, Panama,
Australia & New Zealand.
© Panasonic Home Appliances (Thailand) Co., Ltd. 2010.
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
SR-MS103 / SR-MS183SR-DE103 / SR-DE183

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CONTENT
Page
3
4
5
6
7
8
9
9
10
11
12
13
13
13
14 - 16
17
18
19
20
21 - 22
23 - 24
1. Warning
2. Specification
3. Diagram
3.1 Circuit Diagram
3.1.1 SR-DE103 / SR-DE183
3.2.1 SR-MS103 / SR-MS183
3.2 Block Diagram
3.3 Wiring Diagram
4. Troubleshooting
4.1 Before troubleshooting
4.2 Self-diagnosing
5. Troubleshooting-Part I (for the main unit)
6. Quick Check Test for the Control Board
7. Troubleshooting-Part II (for the P.C.B.)
8. Test Method
8.1 Bubble Test
8.2 Steaming Test
8.3 Keep Warm Test
9. Replacing of P.C.B. (Comp.)
10. Replacing of Cast Heater
11. Replacing of Pan Sensor and Thermal Fuse
12. Parts Exploded View and Replacement Parts List
12.1 Part Exploded View
12.2 Packing View
12.3 Replacement Parts List : SR-DE103 / SR-DE183
12.4 Replacement Parts List : SR-MS103 / SR-MS183
SR-DE103, 183 / SR-MS103, 183

SR-DE103, 183 / SR-MS103, 183
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1. WARNING
Accessory
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
Scoop Measuring cup Steaming
basket
Power cord
Outer lid
Pan
Handle
Body

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2. SPECIFICATION
MODEL SR-DE103 SR-DE183 SR-MS103 SR-MS183
Colour Name
Colour Code
Power Consumption
White White White White
WWWW
120V/50Hz USA & Canada
Panama
-
220V/50Hz Thailand
Hong Kong
Thailand
Hong Kong, PSV
Singapore (RBD)
Indonesia
USA & Canada USA & Canada
Cooking 750W 750W 750W 750W
Cooking Capacity White Rice 1 ~ 5 cups 1 ~ 5 cups2 ~ 10 cups 2 ~ 10 cups
Product Dimension Width 274 mm 274 mm274 mm 274 mm
Weight Approx. 2.8 Kg 2.6 Kg3.1 Kg
Thermal Fuse Specification
Accessories
* If any change occurted to the appearance, wiring or other parts of the warm jar due to property improvement
or other reasons, there will be additional notice.
Keep Warm
Temperature
Others 75 ± 4 ˚C
Indonesia 77 ± 4 ˚C
3.0 Kg
Depth 351 mm 351m351 mm 351 mm
Height 197 mm 197 mm245 mm 245 mm
Keeping Warm 70W 80W 77W 87W
Thailand
Hong Kong, PSV
Singapore (RBD)
Thailand
Hong Kong, PSV
Singapore (RBD)
USA & Canada
Panama 73 ± 4 ˚C
127 ± 6 ˚C
Center Thermostat Working Temperature
172 ˚C
Steaming basket, Scoop, Measuring cup, Power cord
230V/50Hz Singapore (DBD) Singapore (DBD)
Malaysia, AUS/NZ
Singapore (DBD) Singapore (DBD)
240V/50Hz Malaysia, AUS/NZ AUS/NZ AUS/NZ
Power Supply 110V/60Hz Taiwan Taiwan Taiwan Taiwan
SR-DE103, 183 / SR-MS103, 183

SR-DE103, 183 / SR-MS103, 183
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3. DIAGRAM
3.1 Circuit Diagram
3.1.1 SR-DE103 / SR-DE183

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3.1.2 SR-MS103 / SR-MS183
SR-DE103, 183 / SR-MS103, 183

SR-DE103, 183 / SR-MS103, 183
- 7 -
3.2 Block Diagram
NL
Lid heater
Control board (Power side)
Socket
Grounding wire
Cast heater Control board (Operating side)
Side heater
Lid earth lead wire
Lid sensor

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3.3 Wiring Diagram
SR-DE103, 183 / SR-MS103, 183
Terminal ejector should be opposite to the component
2
2
2
Lead wire A for the
thermal fuse assy B
Earth lead wire
Lead wire A
Lead wire C for thermal fuse assy B
Thermister earth lead wire
Lead wire assy
Lid sensor assy
Lead wire B assy
Hinge earth lead wire Lid earth lead wire Lid heater assy
Lead wire A for thermal fuse assy

SR-DE103, 183 / SR-MS103, 183
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4. TROUBLESHOOTING
Before repairing the warm jar from users, please confirm whether it is complete (pan, lid, keep warm pin, etc.)
and inquiry the user for specific malfunctions. Please turn off the power before checking the circuit or
component.
Troubleshooting will be proceeded in two steps, one for the main unit and the other for control circuit board.
Please refer to part I before any checking. If the malfunctioned item is unavailable in the troubleshooting
table, please proceed the basic test to check the control circuit board (refer to page 7). Then decide proper
measures according to the troubleshooting description in part II.
The malfunctioned component and its location are indicated in the right side of trouble symptom.
Each component is designated with a number of checking sequence, please refer to it. Please refer to page 7
for information of diagnosing the malfunctioned parts on panel (for reference only).
4.1 Before troubleshooting
4.2 Self-diagnosing
Display
Symbol Symptom
The “Keep Warm” function is cut off
automatically when the operation
exceeds 96 hours.
All the buttons are inoperative.
Press [ Keep Warm / Off ] button to resume keeping
warm (Do not set keeping warm for more than 12 hours).
Replace the pan sensor (pan sensor is broken off), or
check the branch component of pan sensor on the
computer panel.
All the buttons are inoperative. Replace the pan sensor (pan sensor is broken off), or
check the branch component of lid sensor on the
computer panel.
All the buttons are inoperative. Replace relay or P.C.B. (Cause : The relay is in fault).
Remedy
Precautions for operating microprocessor or control circuit
• The handling personnel should be well grounded.
• The iron should be grounded. Do not use the iron with poor insulation. The iron with microcomputer control
is suggested.
• Do not touch the IC pin or other components before grounded. Do not put the circuit board on conductive
surface that may be charged.
• Do not insert the components from reverse side of the circuit board.
• Do not apply high resistance (x10k) when proceeding continuous measurement with multi-meter, otherwire,
the IC and other components on the circuit board may be damaged due to the high voltage.
• Try to shorten the welding time (within several seconds).
• Please turn off the power before replacing any component.
• The transformer for control panel has a voltage of AC 110V, 120V, 220V, 230V, 240V, so please take care
when handling the electric control board to avoild electric shock or hurt.
The microcomputer is composed of CMOS digital IC and MOS FET, so it is quite sensitive to electrostatic,
such as electrostatic from body, clothes, iron, etc. Please handle it carefully as per following instructions :
The following symbols will appear on LCD automatically when it is abnormal.

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5. TROUBLESHOOTING-PART I (for the main unit)
Note :
Drawing No. Remark
Malfunctioned
Component
15 23 44 48 48 54 61 6 22
Lid Heater Cast Heater Warming Heater Pan Sensor Thermal Fuse Terminal AC Cord Outer Lid Comp. Pan Parts on the P.C.B.
Refer to page 8, when the
malfunctioned parts are
supposed to be on the
P.C.B.
Does not cook
Cooking LED
lights up
Unit
Description
Symptom
Cannot cook rice correctly
(stops early or cooking
is uneven, etc.)
This may occur due to user’s
improper measurement or
insufficient loosening of rice.
Rice on bottom of the inner
pan is scorched
Keep Warm temperature is
high (over 78 ˚C)
Check that there is on dirt or
foreign substances stuck to
the surface of the pan sensor.
This may occur by unplugging
or insufficient loosening of rice.
This may occur when the lid is
kept open for a long time,
insufficient loosening of rice or
falling of “Keep Warm” pin.
Mark means the components that may malfunction.
SR-DE103, 183 / SR-MS103, 183
LED does not
operate at all
Indicates
“H01” on LCD
Indicates
“H02” on LCD
Indicates
“H05” on LCD
Cooking LED
does not light
up
If the fuse melts, check and
remove the cause firstly, then
replace the malfunctioned part.
Keep Warm temperature is
low (below 68 ˚C)
Does not
Keep warm
Keep Warm
LED lights up
Droplets fall onto the surface
of rice
The surface of rice dries up
The bottom of warm jar melts
and fires

SR-DE103, 183 / SR-MS103, 183
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6. QUICK CHECK TEST FOR THE CONTROL BOARD
Check performance of the P.C.B. in the following procedure. If any failure detected, repeat the performance
again. (Refer to page 8). If still abnormal, replace spare parts on the control panel or the whole control board
(comp.) according to “Troubleshooting-Part II” on page 12 and “Problem Diagnosing Table” under subject of
“4.2 Self-diagnosing” on page 9.
Connect the unit to a power source by inserting the
plug into an outlet. In the stand-by mode, press the
[Start], [Menu Select] and [Keep Warm] button
simultaneously with fingers.
1.
With the keys pressed, if all areas on the LCD panel
light up, as shown at right in Fig. B, the control board
can be judged to be normal. (Releasing any or all of
the three keys will cancel the test condition)
2.
[Fig. A]
[Fig. B]
When releasing the three keys, the [Hour] lights up as
shown in right Fig. C and the buzzer sounds, then cooking
starts. When the pan sensor temperature reaches the
cooking end level, the heating operation switches to the
warming mode.
Press the [Keep Warm] button. Operate and check whether other function buttons are normal.
If the above 1 to 4 operation proves to be normal, the P.C.B. comp. can be judged as OK.
3.
4.
[Fig. C]
Start
SR-MS103
FUZZY
Off
Menu
Select
Keep
Warm
Timer
hour min
Cooking
Timer
Start
SR-MS103
FUZZY
Off
Menu
Select
Keep
Warm
Timer
hour min
Cooking
Timer
Start
SR-MS103
FUZZY
Off
Menu
Select
Keep
Warm
Timer
hour min
Cooking
Timer

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7. TROUBLESHOOTING-PART II (for the P.C.B.)
Note :
Drawing No. Remark
Malfunctioned
Component
38 SW LCD X1 BZ T RL TR1 BAT
P.C.B. (comp.) Tact Switch LCD
Parts on the control panel
Cermic Resonator Buzzer Transformer Relay Triac Flat Cable Li Battery
Does not cook
Cooking LED
lights up
Unit
Description
Symptom
Cannot cook rice correctly
(stops early or cooking
is uneven, etc.)
Rice on bottom of the inner
pan is scorched
Keep Warm temperature is
high (over 78 ˚C)
Mark means the components that may malfunction.
SR-DE103, 183 / SR-MS103, 183
LED does not
operate at all
Cooking LED
does not light
up
Keep Warm temperature is
low (below 68 ˚C)
Does not
Keep warm
Keep Warm
LED lights up
Does not keep warm
continuously
Droplets fall onto the surface
of rice
Buzzer does
not sound
Part of the LCD is blank
The clock display disappears
after unplugging
Other operations
are normal

SR-DE103, 183 / SR-MS103, 183
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8. TEST METHOD
1. Insert the pan into the cooker main body and turn it slightly clockwise and anti-clockwise to place the pan
properly on top of the cast heater.
2. Pour small quantity of water into the pan so that the bottom of the pan is immersed with water.
Close the lid completely.
3. After connecting to power, select [Quick] from [Menu Select] and then press [Start] button.
4. When the water boils, the cooker will blow off steam. When you see the steam, open the lid, and then
press the brim of the pan to completely touch it to the cast heater. Then check the water bubbling condition.
8.1 Bubble test
After confirming the bubble test is acceptable, spread two
or three sheets of tissue paper (or gauze) over bottom of
the pan to leave the cooker on without closing the lid.
Note :
• Be sure to fully open the lid to protect the plastic parts
from thermal distortion caused by steam.
• Make holes in the tissue paper (or gauze), as shown,
so that it will not float up during steaming.
8.2 Steaming test
See the right figures :
8.3 Keep Warm test
• Water bubbles appear at three areas and are distributed
evenly around the circle..............Acceptable
• Water bubbles are distributed unevenly and not around
the circle......................................Unacceptable
• The unacceptable result is possibly due to incomplete
contact of bottom of pan and the cast heater. So please
check the heater surface for foreign material and remove
them or replace the defective part (pan or cast heater).
1. Place a mercury thermometer between urethane foam blocks as shown below. Urethane foam blocks
(ASN-300) and the thermometer (ASN-150H) are supplied as spare parts.
2. Place the urethane foam blocks holding the thermometer into central bottom of the pan and allow the
cooker to run in the “Keep Warm” condition for more than 1 hour.
3. More than 1 hour later, open the lid and read the temperature within 10 seconds.
- If it is within 69˚C - 77˚C, then considered as normal.
- If the warming temperature is out of this range, check whether there is any dirt of foreign material stuck
on the pan sensor or bottom of the pan, if so, please remove them.
- If nothing is found, adjust the warming temperature and replace the control circuit board (comp.)
Inner pan (top view)
Holes of
tissue paper
Brim of pan
Bubble
Tissue paper
Mercury thermometer
Urethane foam blocks
Mercury thermometer
Pan

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SR-DE103, 183 / SR-MS103, 183
9. REPLACING OF P.C.B. (Comp.)
• Open the lid and place the cooker upside down on a
rubber sheet to protect it, as shown in the right figure.
• Unplug the power cord.
• Remove the screw (1) on power socket cover and
take out the power socket and its cover (comp.)
• Remove the wiring of power socket (3 places).
1. Remove the power socket (comp.)
Remove the retaining screw of the body
Remove the hinge cover
• Remove the 4 retaining screws of the body.
2.
• Remove the retaining screw first, and then insert the
screwdriver between hinge cover and body, as shown
in the right figure.
• Pry the screwdriver outward like a lever to disconnect
the hinge cover.
3.

SR-DE103, 183 / SR-MS103, 183
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• Place the cooker upside down on a rubber sheet, then
insert the screwdriver upright for about 30 - 40 mm.,
as shown in the right figure.
• Turn the screwdriver in arrow direction to remove the
body, as shown in the right figure.
• Do not knock at the screwdriver, othewise the parts
contacted with screwdriver will be damaged.
Please follow the above procedures to remove.
4.
Note :
• For connectors or thing like this, please pull
outward directly. If pulled out in different directions,
the coil may be damaged or P.C.B. cracks due to
the pressure applied on it.
• When pulling out the fastening terminal, please
press the pin down in arrow direction while pulling.
Otherwise, the terminal can not be pulled out.
Note :
Please wear an anti-static wring strap or take relative
measures to prevent electric shock.
Remove the body of cooker
Remove the wiring of P.C.B. component
Remove the P.C.B. base (comp.)
• Pull out each connector with a pincers.
• Pull out the fastening terminals (3 places) with a
pincers.
5.
• Remove the fire-retardant tape attached on the P.C.B.
• Unplug the wiring connected to P.C.B.
• Remove the retaining screw on P.C.B. base (3 places).
• Take out the P.C.B. base directly with hand.
• Remove another fire-retardant tape attached on the
P.C.B.
6.

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SR-DE103, 183 / SR-MS103, 183
• Remove the tabs at (a) gently, then take out the P.C.B.
(operating side) while lifting.
• Remove another fire-retardant tape attached on the
bottom of the P.C.B.
• Remove the retaining screws gently. Then take out
the P.C.B. (power side) while lifting.
7. Take out the P.C.B. component
Assembly of P.C.B. base (comp.)
• When assembling the P.C.B. base (comp.), please proceed in reverse to disassembly.
• When reassembling, make sure to attach the fire-retardant tapes as what they are before removing.
8.
Note :

SR-DE103, 183 / SR-MS103, 183
- 17 -
10. REPLACING OF CAST HEATER
• Remove the power socket and body in referring to replacing of P.C.B. base (comp.)
1.
• Remove the retaining screw of cast heater (3 pieces).
• Take out the cast heater from protection frame.
• Please reassemble the cast heater in reverse to disassembly.
Note :
• When reassembling, make sure to attach the fire-retardant tapes as what they are before removing.
3.
4.
Remove the power socket (comp.) and body
• Tear off the retaining tapes (2 places) on the wiring of the pan sensor.
• Remove the connections (2 places) between pan sensor and P.C.B.
• Remove the wiring (1 place) connected between pan sensor and cast heater.
• Remove the connection (1 place) between cast heater and P.C.B.
• Remove the grounding wire.
• Remove the connections (3 places) on base of sensor.
• Take out the base of sensor.
2. Remove the base of sensor
Remove the cast heater
Reassembly

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SR-DE103, 183 / SR-MS103, 183
11. REPLACING OF PAN SENSOR AND THERMAL FUSE
• Remove the cast heater in referring to replacing
of cast heater.
1. Remove the cast heater
Remove the pan sensor
Replacing of thermal fuse
• Upright the tabs (3 places) as shown in the right
figure, then take out the pan sensor.
Note :
• Do not deform the spring when removing.
2.
• The procedure of replacing of pan sensor is actually
a procedure of replacing of thermal fuse A/B, for
they both fixed inside of pan sensor.
• Please reassemble the pan sensor in reverse to disassembly.
Note :
• Do not deform the spring when assembling.
• Do not slant the spring when assembling.
• Check the direction of pan sensor.
3.
Reassembly4.

SR-DE103, 183 / SR-MS103, 183
- 19 -
12. PARTS EXPLODED VIEW AND REPLACEMENT PARTS LIST
12.1 Parts Exploded View
19
20
33
3
2
1
4
5
6
7
9
8
11
15
16
14
13
12
10
22
23
24
25
27
32
17
18
31
30
28
29
21
XTN4+8GFJ
XTB4+12GFJ
(FOR MS SERIES) (FOR DE SERIES)
XTL4+10RTW
XTL4+16AVW
(FOR MS SERIES) (FOR DE SERIES)
XYM4+E10FNS
XYC4+CF8FJ
XTB4+12GFJ
XTB4+12GFJ
26

- 20 -
SR-DE103, 183 / SR-MS103, 183
12.2 Packing View
(FOR MS SERIES ONLY)
3
1
4
7
6
2
5