“\
FILE NO.
I
SERVICE MANUAL Automatic Bread Maker
SBM-20 (NewZealand)
PRODUCTION CODE No.
343631200
REFERENCE NO. SM-680039
1. Specifications
Power Source
230V (50Hz)
Heater
430W
Power Consumption
Main Motor
50 Hz
1Oow
Outer Dimensions
34.0 (W) x 25.0 (D) x 33.7 (H) cm
Weight
Approx. 6.5 kg
Timer
2 Hrs 50 min. up to 12 Hrs.
Cord
Approx. 1.8 m length
Thermal Fuse
Baking temp. 192°C
Accessories
Cook book, Instruction manual
2. Constructions and Operation Procedures
1. Constructions
The kneader blade attached to the inner pot ass’y is rotated by the main motor by way of the pulley and the
belt. The ingredients inside of the inner pot are kneaded by the kneader blade. The inside of the tempera-
ture is controlled by the thermal sensor and the heater between the processes of “kneading” and “baking”.
-—
Outline of Constructions
I
N--
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0
/
[
El
VA
n
El
n
\
Inner pot Ass’y,
‘L-
—
.
Kneader blade
Heater
4
\
\
~ Thermal sensor
~ Over temperature protector
Main motor Ass’y
Pulley
Belt
2
3. Circuit Diagram
The sign A :
The parts marked with ~ have special characteristics important for safety.
When replacing any of these parts, use only manufacturer’s specified parts.
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C108
5
R1ll
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D102 -(
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.-
—
+,
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R18
-—— ——— ——— ——_ ——_ ___ ___ ___ ___ ___ ___ ___ ___ _
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3
“’u’
(ELECTRICAL PARTS LIST)
POWER SUPPLY UNIT
CONTROL UNIT
“L
SYMBOL I
SPECIFICATION
Iclol IC AN7905 or UPC7905HF
TR101 Triac TM561 S-L
TR102 Triac TM361 S-L
D101 Diode Stack 1B4B42 or DBB1OB
D102
Diode GMAO1
Q101,Q1O2,Q1O3Digi. Tra. 2SA1348
Q104
Transistor 2SC181 5-Y
VAR101 VaristorERZV07D431UorERZC07DK431U
orERZC07DK431
VAR102
I Varistor ERZC1 ODK270
VAR103
Varistor MFCN08D431 K
PH101,PH1O2 Photo Triac. S21ME3 or S21ME3Y
SK101 Spark Killer ECQJO186X
C103
I Metallized Film Cap. O.11.LF250V
C104, C105 Metallized Film Cap. 0.1pF 50V
C106 Ceramic Cap. 1.5LF 25V
C107 I Electrolytic Cap. 22001LF25V
C108
I Electrolytic Cap. 10OOVF25V
R101
&rtXY12.7M~l/ZW
R102,R1O3 Flameproof Carbonl 00(2 l/2W
R104,R1O5 Metal Oxide 220S21W
R106,R1 07 I Flameproof Carbon 680f2 l/2W
R108
Carbon 620L2l/dW
R109
Carbon 150kL) l/dW
R11O
Carbon 3.9kL2 l/aW
Rlll I Metal Oxide 150L21 W
BZ101 I Piezo Buzzer PKM24SP-3805
L101
Coil SL02B121
PT101
Power Transformer ETP35KCN61 TU
F102 Fuse 315mA 250V
SYMBOL
SPECIFICATION
ICI
IC UPD75006CU-081
IC2 Ic M51943BL
IC3 Ic MLC4049B
LD1 LED GL3P404N
TR1 , TR2 Digi. Tra. UN6215
TR3, TR4,
TR5, TR6,
TR7, TR8, Digi. Tra. UN611 F
TR9, TR1 O,
TR1l, TR12,
TR13, TR14
TR15, TR16, Digi. Tra. UN6124
TR17, TR18
Dl, D2,
Diode GMAO1
D3, D4
cl, C2, Ceramic Cap. 1.5pF25V
C3, C4
C5, C6 Ceramic Cap. 10OOpF50V
C7
Electrolytic Cap. 10OP.F6.3V
C8
Electrolytic Cap. 0.33pF50V
C9
Electrolytic Cap. 4.7 pF50V
Rl, R2
Carbon 4.7kKUldW
R3, R4
Carbon 2.2kG?l/dW
R5~R12
Carbon 1.2kG?VdW
R13
Metal Film 11k~l/4W
R14 Carbon 10OL2VaW
R15 Metal Film 1.5k~l/4W
R16
Carbon 47CY14W
R17
Carbon 10Okf2VdW
R18, R19 Metal Oxide 330(21 W
R20
Carbon 330QV4W
xl
Ceramic Osc. CST4.I 9MGW-TFO1
Swl , SW2,
SW3, SW4,
Key Switch EVQ-215-05R or SKHVBE
SW5
4
4. Operational Principles
1 ) Operation procedures
L
Refer to the separate instruction manual.
Block diagram
Power
transformer
Power circuit
7=
(I Motor control
— - >--------lz51-
Heater control
------------
3) Power circuit
“Circuit diagram
ICI
Indicator circuit
E
EIEEEcl-
Ezcl
POWER SUPPLY UNIT
< >
CONTROL UNIT
1‘1x!K:‘::
,-
---------------.
Rll
+
+
Clm C107 CI08
G
PTIOI ‘- -----D;o;--”- “-:
IN
OUT
(!)
I
A
Iclol
‘/)
B
●Voltage at each point (Ground is shown as VDD)
@ -13V @ -5V
.Description of operation
(1) VDD-VSSPower supply (-5V)
The secondary output of the power transformer (PT101 ) is given
l-l--r
21
VDD
k
1
cl
42
ICI
Vss
I
bridge-rectification
by the diode
stack (D101 ) and the condenser (Cl 07) to produce -13V voltage at A. The voltage at A is used to
compose B -5V power supply by the operation of constant voltage circuit consisting of 3-terminal
output voltage regulator (pRIMARY:lCl 01).
4
5
4) Heater and motor control circuits
“Circuit diagram
—
Q101
OVER
TEMPERATURE
PROTECTOR
T
I
r--J’
I&
al
-TT
I PH102
QI; +
~i ,
L—
R104 (o
L101
o
E
I I II I
C230V
I
A I
A A
5(3H7
R105
-----
1
21
VDD
P60
P61
ICI
(J-13V
.Description of operation
(1) Heater control circuit
When the voltage at pin 32 of the microcomputer (IC1 ) becomes Low (-5V), the signal will drive
transistor (TR4) ,transistor (QI 01) ,photo triac (PHI 01), and then triac (TR1 01) to operate the heater.
(2) Motor control circuit
When the voltage at pin 33 of the microcomputer (IC1 ) becomes Low (-5V), the signal will drive
transistor (TR3) ,transistor (Ql 02) ,photo triac (PH1 02), and then triac (TR1 02) to operate the motor.
5) Reset circuit
—
●
Circuit diagram
2’
VDD
IC2
R17
ICI
1
3 5
R16
3 —
{)
RESET
C7 +
C2
C9 +
42
Vss
(1) The reset circuit generates the signal which resets the microcomputer.
6
6)
7)
Control circuit for inner temperature
●
Circuit diagram
21
,
TH1
TR5
24
25
23
R14
TR2
()
C3
C8 +
18
42
IC3
I
VDD
P21
P20
P22
PI l/lNTl
Vss
●Description of operation
(1) The circuit controls the inner temperature during the timer setting and start of operation.
Oscillator circuit
+Circuit diagram
xl
------- ...... 1
8) Buzzer circuit
●
Circuit diagram
5
n;
4
d
.>
42
x2
ICI
xl
Vss
POWER SUPPLY UNIT < : >
CONTROL UNIT
21
R20
+ }
: RI
22
TRI
VDD
ICI
P231BZR
Vss
-
5. Characteristics
-
.Basic ( Lg. Medium)
1
1
of Baking (Operation Processes)
(Lg. Dark) course
Setting KNEAD
o
Lg.Medium10min.~ 9
hrs. 50 min.
Lg. Dark
10 min. -8 hrs. 50 min.
>
6 min.
<
1
1
I
HI
Heater
ON/OFF OFF
Main motor
OFF * ‘ ON
.Basic (Reg.) course
KNEA
@
31mil
RS
SE
mir
.
8~
—
—
E
—
)FF
—
—
Se(
—
.
3FF
—
K
.
SHAPE
)se
.
—
—
)FF
—
)FF
—
aec
—
—
—
)FF
—
G
—
INAL
KEEP
BAKE
ISE
WARM
*2
1
min. Lg.Mejium:50min.
Max.
1sec. Lg.Dak :7Dmin. 80 min.
D
135C
Oc
*
)FF OFF OFF
Setting KNEAD KNEAD
FIRST
FINAL
KEEP
SHAPE BAKE
WARM
lomin. @ @
RISE
RISE
*2
-9 hrs.
63 min.
Max.
*Orein, 6 min. 27 min.
23 min. 5 sec.
10 sec. 5 sec.
40 sec. 40 min.
60 min.
<
>
135C
38~
4o”c
14C
Heater
ONIOFF
OFF
ON/OFF
OFF
ONIOFF OFF OFF OFF
ONIOFF ON/OFF
Main motor
OFF *’ ON ON OFF
ON
OFF
ON OFF
OFF
OFF
Time until finish
of BAKE
Lg. Medium 2 hrs. 50 min.
Lg. Dark 3 hrs. 10 min.
Time until finish
of BAKE
2 hrs. 40 min.
8
.Whole Wheat (Lg.) course
E
Heater
Main motor
Setting REST KNEAD KNEAD FIRST
10min.
0)
@
RISE
%7 hrs.
soMin, 30 min. 6 min. 25 min. 79 min
130”C I I \ 30”C
w
14°c
)fVOFFON/OFFOFF OFF ON/OFf
&
.Whole Wheat (Reg.) course
#
PUNCH REST SHAPI
29 min.
15sec. 45 sec. 3 sec
30”C
++
it
OFF OfVOFF OFF
ON OFF ON
FINAL
RISE
44 min
57 sec
::
30”C
BAKE
55 min.
135°c
r
ON/OFF
OFF
KEEP
WARM
*2
Max.
60 min.
\
ONIOFF
OFF
Setting REST KNEAD KNEAD FIRST PUNCH REST SHAPE FINAL
BAKE
KEEP
10min.
0
(2)
RISE
RISE
WARM
-7 hrs.
29 min.
54 min.
*2
40min.
30 min. 6 min. 18 min. 76 min. 10sec. 50 sec. 3 sec. 57 sec.
45 min.
Max.
60 min.
<
>
135°C
3o”c 30”C 3o”c 30”C
14°C
/
Heater
ONIOFF
ONIOFFON/OFF OFF OFF ONIOFF OFF ONIOFF OFF ONIOFF ONIOFF
Main motor
OFF OFF *’ON ON
OFF
ON OFF ON OFF OFF OFF
Time until finish
of BAKE
4 hrs. 30 min.
Time until finish
of BAKE
4 hrs. 20 min.
●French course
KEEP
WARM
*2
Max.
~
min
-
\
Setting
10min.
-8 hrs
IOmin.
PUNCH
REST
28min.
40Sec.
-
3o”c
SHAPE
‘INAL
?ISE
3
min
10Sec
-
36C
Time until finish
of BAKE
3 hrs. 30 min.
(NEAD
@
22min.
FIRST
RISE
34min.
BAKE
65min.
-
1357.3
r
fOsec.
5sec. 5 sec.
5 sec.
OFF
Iosec
-
OFF
5 SW.
-
OFF
_
-
OFF
OFF
OFF
ON
30T
14C
OFF
T
.-
Heater
RR
OFF
G
OFF
DN/OFF
OFF
2NIOFF
OFF
M/OFF
OFF
ONIOFF
OFF
Main motor
ON
ON
OFF
ON
OFF
“Sweet course
Setting
10min.
-8 hrs
10min.
147.3
PUNCH
REST
28min.
40 sec.
SHAPE
1
Time until finish
KEEP
WARM
*2
Max.
50 min
‘INAL
W3E
16min
10sac
:NEAD
o
3min.
<NEAO
@
31min.
~lRST
W3E
!0 min.
BAKE
50 min
::
130V
r
I
of BAKE
3 hrs. 25 min.
Osec
-
OFF
OFF
5sec. 5 sec.
5 sec.
OFF
T
IOsec
5 sec.
_
4
30”C
36°C
3o”c
OFF
OFF
OFF
OFF
E
Heater
Main motor
OFF
z
OFF ONIOFF
ON
OFF
3NIOFF
OFF
Rim
OFF
)NIOFF
OFF
OFF
)NIOFF
OFF
)t40FF
OFF
‘ ON
ON
ON
ON
10
●Dough course
*1
*2
E
Heater
Main moto
Setting
10 min.
,10 hrs.
10 min. .
14°C
DNIOFF
OFF
KNEAD
@
6 min.
.
OFF
*’ ON
KNEAD
@
24 min.
OFF
ON
FIRST
RISE
60 min.
>
30”C
/
ONIOFF
OFF
1 hr.30 min.
During the first 6 min. of the KNEAD@ process, the main motor is operated intermittently.
The KEEP WARM process is maximum 60 minutes. Even if within 60 minutes, when temperature of sensor
is over 80 temperature impressed, the keep warm is completed.
11
(
(
(’
Key
Indication
Operation Remarks
START STOP SELECT
A (Up) V (down)
(1) POWER
Basic
0:00 only flashes at 1.66Hz. When power
ON
operation
,11111,
supply cord is
: l-l
● I-1 g-l :
turned on.
, &t”&/&/
\
‘11111’
Operation
x
Key input is neglected.
against
(While error is sounding)
input
o To STOP (2)
o
To SELECT (3)
x
Key input is neglected.
(While error is sounding)
x
Key input is neglected.
(While error is sounding)
(2) STOP
Basic
No indication
When STOP
operation
switch is
depressed in the
condition (1).
Operation
x
Key input is neglected.
against
(While error is sounding)
input
o
To STOP (2)
o
To SELECT (3)
x
Key input is neglected.
(While error is sounding)
x
Key input is neglected.
(While error is sounding)
Key
Indication
Operation
Remarks
START STOP
SELECT A (up) ? (down)
(3) SELECT
Basic
operation
“1” is indicated. When SELECT
switch is depressed
in the condition (1)
or (2).
o
Operation
against
input
o
Menu selected with the
SELECT key is started.
For menuclsplay,
see the instruction
manual.
To STOP (2)
o
The display changes with each
SELECT switch input.
o
To TIMER SETTING (4)
.
CJ
o
To TIMER SETTING (4)
(4)
TIMER
SETTING
Basic
operation
“2:50” is displayed.
(In case of Basic (Lg. Medium))
When A (up) or
7 (down) switch
is depressed in
the condition (3).
Operation
against
input
o
0
0
0
0
Starts according to timer
setting.
To START (6)
To STOP (2)
Moves onto menu select (5) of
timer settings.
TIMER SET time increases in
10 minute increments.
●When pressed,
time is added at
high speed.
. When pressed,
time is subtracted
at high speed.
TIMER SET time decreases in
10 minute increments.
(
(
(
A
+
(
Key
Indication
Operation
Remarks
START STOP SELECT
A (up) V
(down)
(5) Menu select
Basic
When SELECT
in timer
operation
switch is
settings.
●
depressed in the
●
:
condition (4).
Operation
o
The time preset by the timer
against
setting key are starts counting.
input
TO START (6)
o
TO
STOP(2)
o
Returns to display in timer
Course change is
settings.
not carried out.
o
Returns to timer setting time
Display time is
display.
To TIMER SET (5)
counted up 10
minutes.
o
Returns to timer setting time
Display time is
%%tiER SET (5)
counted down 10
minutes.
(6) START
Basic
~l~!l.i ~)
Displays baking time.
operation
~ ,; ,<:f ~~
Operation starts for baking time
When the START
selected by the SELECT key.
key is pressed
The colon (:) changes from
after selection or
being steadily lit to flashing,
when the timer
and the display is counted
has been set.
down 1 minute at a time.
Operation
x
Key input is neglected.
against
input
o
Moves onto STOP (2) with
input of 1 second or more.
x
Key input is neglected.
x
Key input is neglected.
x
Key input is neglected.
1
Key
Indication
Operation
Remarks
START STOP SELECT
A (up) V (down)
(7) Keep
Basic
The colon (:) in the “0:00” Changesto “keep
warm
operation
g-hi !// g-/ g-)
display flashes.
warm” mode after
mode
#J. :#,,, _/g
baking is complete.
Operation
x
Key input is neglected.
against
input
o
To STOP (2)
x
Key input is neglected
x
Key input is neglected.
x
Key input is neglected.
(8) Keep Basic
#-/
● t-l 8-)
The colon (:) changes from
Warning ends 1
warm
operation
:/.4/tf
flashing to being steadily lit.
hour after startof
.-
complete
keep warm mode,
or when oven
temperature is
80”C or more.
Operation
x
Key input is neglected.
against
(No error warning)
input
o
To STOP (2)
x
Key input is neglected.
(No error warning)
x
Key input is neglected.
(No error warning)
x
Key input is neglected.
(No error warning)
Demonstration(for inspection)
Inspection demonstration mode is set when power plug is connected to the power outlet while depressing ail of SELECT,DOWN and START switches.
Operation is the same as ordinary one. Only exception is that depressing of UP key at the time of starting makes the process move to the following one.
(
(
(
(
7. Disassembly Procedures
1.
Disassembly of lid
(1)
(2)
L
Remove the fitting screws on the left side of the lid hinge. Open the lid and, while lifting its left side slightly,
slide rightward to dismount the lid ass’y.
Finder glass, glass supporter and air exhaust can be dismounted by removing tab of outer lid fixing inner
lid. (Fig. 1)
Inner lid
Gla
Outer
2. Disassembly of main unit
(1)
(2)
(3)
b
(4)
(5)
(6)
The bottom lid can be dismounted by removing 4 fitting screws and 4 feet on the bottom lid.
The power supply cord can be removed by unfastening 3 screws on the terminal ass’y and the screw on the
cord bushing (Fig. 2)
Removing the fitting screw on the rear surface
of control panel. The control panel can be re-
moved from the main unit by removing tab of
control panel out of enclosure, through pressing
rightward on the rear surface of control panel.
The control panel can be dismounted by remov-
ing detached 2 sockets from the control PCB
ass’y.
The control PCB ass’y can be removed from
control panel by removing the 2 fitting screws
and tab of control panel.
Remove the 4 fitting screws of the heating shel-
ter plate (B). The heating shelter plate (B)
can be dismounted by setting tab of heating
shelter plate (A) to its horizontal position.
(Fig. 2)
The main unit can be pulled up after removing 6
fitting screw of inner case (upper) , and the
main unit can be separated out of enclosure.
(Fig. 2)
Self-tapping screw, pan hd. 3 x 8mm
F&
Self-tapping screw, pan hd. 3 x 6mm
h
r
%Enc,.s.re
plate (A)
Power supply cord ass’y
(Fig. 2)
16
(7)
(8)
(9)
(lo)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
Cut the 3 fixers that hold the lead wire.
Then, remove the following sockets: socket from the motor (blue socket), socket from the heater (white
socket), socket from the over temperature protector ass’y (yellow socket).
The power supply PCB can be dismounted by removing the 2 fitting screws of power supply PCB and the
fitting power supply PCB and fitting screw of power supply PCB supporting plate and lead wire 105L from
the terminal ass’y (blue and brown wire).
The capacitor can be dismounted by removing the fitting screw.
By removing the 3 main motor fit-
ting screws, the main motor ass’y
and belt can be removed from
frame.
The pulley (big) and pulley
washer can be dismounted by re-
moving the pulley (big) fitting
ring.
The heating shelter plate (A)
can be dismounted by removing
the 2 fitting screws of heating
shelter plate (A).
The inner pot connector base
ass’y and inner case ass’y can be
separated by removing the 3 fit-
ting screws of inner pot connector
base ass’y. (Fig. 3)
Pull out the 2 sockets of the lead
-,
.
(Fig. 3)
wire from the heater. The ground lead wire 40L can be detached be removing its 1 fitting nuts. By remov-
ing the heater fitting nut and heater supporting insulator fitting nut, the heater ass’y can be dismounted
from the inner case.
By removing the fitting screw of the heater supporting plate,the heater supporting plate and the heater
supporting insulator (small) can be dismounted from heater ass’y.
By removing the 2 fitting nuts of
the heater supporting insulator
(big), the heater supporting in-
sulator (big) can be dismounted
from inner case.
The over temperature protector
unit can be dismounted by re-
moving the screw inside of the in-
ner case which is fixing the over
temperature protector unit.
The over temperature protector
ass’y can be removed by
straightening the fixing tab of the
over temperature protector sup-
port. (Fig. 4)
The sensor ass’y and the sensor
holding plate can be dismounted
by removing the screw inside of
the inner case which is fixing the
sensor ass’y. (Fig. 4)
Washer spring 3mm
Heater supporting plate
Screw pan hd. 3 x 10mm
Sensor ass’y
V
)
c%
Sensor holding
date
~.—
Tarmi
pa;”hd~3 x 6m’m
7“
Over temperature
protector ass’y
Heater supporting insulator (Big)
(Fig. 4)
The inner pot support spring can be taken out by removing its fitting screw.
17
(20)
By removing
(Fig. 5)
the 2 hindge fitting screws, the hinge and reinforcement can be dismounted from
,=
Tapping screw, pan hd. 4 x 8mm
Hinge
Reinforcement
Enclosure
(Fig. 5)
enclosure.
Precautions for Reassembly
1. When mounting the power supply cord, the cord bushing should be attached to the cord holder so that the
dimension between the bushing and the exit of the lead wire is approx. 20 mm. (Fig. 6)
For wiring of the terminal section, see Fig.6.
Lead wire 105L
Ground
(greenly
(Fig. 6)
2. When mounting the belt, the belt is hooked on the pulley (small) is hooked partially from the lower side of
the pulley (big). The belt is wrapped on the pulley (big) by turning on the pulley (big) . (Fig. 7)
Pulley
ame
Pulley (small)
Belt
(Fig. 7)
18
3. Wiring should be made as shown in the specified wiring diagram. (Fig 8)
Motor
\
Motor ~ Capacitor
Blue and red connector
4
Capacitor ------1 lllA
-2 J!!!i!
01
PCB
(Fig. 8)
I
Illustration of Wiring
I
L=%=@‘owers”pp’’cord
\\ .-”
BI
Heater
n
Terminal ass’y
pw ~~
1111
Blue
\\
‘ ‘“r= n !/iir
Green/Yellow,)
~uuu u\\
Control PCB
-
Capacitor
19
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