Sanyo SBM-20 User manual

“\ 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) x25.0 (D) x33.7 (H) cm
Weight Approx. 6.5 kg
Timer 2Hrs 50 min. up to 12 Hrs.
Cord Approx. 1.8 mlength
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
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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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(ELECTRICAL PARTS LIST)
POWER SUPPLY UNIT CONTROL UNIT
“L
SYMBOL ISPECIFICATION
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 IVaristor ERZC1 ODK270
VAR103 Varistor MFCN08D431 K
PH101,PH1O2 Photo Triac. S21ME3 or S21ME3Y
SK101 Spark Killer ECQJO186X
C103 IMetallized Film Cap. O.11.LF250V
C104, C105 Metallized Film Cap. 0.1pF 50V
C106 Ceramic Cap. 1.5LF 25V
C107 IElectrolytic Cap. 22001LF25V
C108 IElectrolytic Cap. 10OOVF25V
R101 &rtXY12.7M~l/ZW
R102,R1O3 Flameproof Carbonl 00(2 l/2W
R104,R1O5 Metal Oxide 220S21W
R106,R1 07 IFlameproof Carbon 680f2 l/2W
R108 Carbon 620L2l/dW
R109 Carbon 150kL) l/dW
R11O Carbon 3.9kL2l/aW
Rlll IMetal Oxide 150L21W
BZ101 IPiezo 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(21W
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=
(IMotor 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
AIclol ‘/) 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 Ais 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
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I&
al
-TT
IPH102
QI; +
~i ,L—
R104 (o
L101 o
E
I I II I
C230V IAIA 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
13 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)
11
of Baking (Operation Processes)
(Lg. Dark) course
Setting KNEAD
o
Lg.Medium10min.~9hrs. 50 min.
Lg. Dark 10 min. -8 hrs. 50 min. >6min.
<
11
I
HI
Heater ON/OFF OFF
Main motor OFF *‘ON
.Basic (Reg.) course
KNEA
@
31mil
RS
SE
mir
.
8~
—
—
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—
)FF
—
—
Se(
—
.
3FF
—
K
.
SHAPE
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—
—
)FF
—
)FF
—
aec
—
—
—
)FF
—
G
—
INAL KEEP
BAKE
ISE WARM
*2
1min. 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, 6min. 27 min. 23 min. 5sec. 10 sec. 5sec. 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 2hrs. 50 min.
Lg. Dark 3hrs. 10 min.
Time until finish
of BAKE
2hrs. 40 min.
8

.Whole Wheat (Lg.) course
E
Heater
Main motor
Setting REST KNEAD KNEAD FIRST
10min. 0) @RISE
%7hrs.
soMin, 30 min. 6min. 25 min. 79 min
130”C II\30”C
w
14°c
)fVOFFON/OFFOFF OFF ON/OFf
&
.Whole Wheat (Reg.) course
#
PUNCH REST SHAPI
29 min.
15sec. 45 sec. 3sec
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. 6min. 18 min. 76 min. 10sec. 50 sec. 3sec. 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
4hrs. 30 min.
Time until finish
of BAKE
4hrs. 20 min.