Sanyo EM-S889 Service Manual

SUPPLEMENTOF
SERVICE MANUAL

Microwave Oven

I FILE NO.

I

EM-S889

(New Zealand)

m’

n

,AL[[) ,SM.\OR

e

o

3 F!?HFILLET 4 POTATO

— START —
5vEGEWIES 6Cd55ERCLE

Product Code No.

43731423

See the service manual

of EM-S829(SM-860043) except

the items described in this service manual.

Foreword

Read this manual carefully, especially precaution on microwave energy, and follow the procedure strictly.
Careless servicing and testing may expose yourself to the microwave energy leakage.

PRECAUTIONS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO
EXCESSIVE MICROWAVE ENERGY

(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave

source, and make repairs as necessary:
(1) Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage),

(4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.

(c) Before turning on microwave power for any service test or inspection within the microwave generating compartments,

check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmis-

sion systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is
released to the owner.

REFERENCE NO. SS-860045

— TABLE OF CONTENTS —

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1

Test Procedures . . . . . . . . . . . . . . 3

Power Output Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 1

Exploded View and Parfs List . . . . . . . . . . . . . . . . . . . . ...4 -8

Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2

Overall Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . ..9-1o

1. SPECIFICATIONS

Rated Power Consumption
Microwave Output

Frequency
Power Supply
Rated Current
Safety Devices

Timer

. ...........

Overall Dimensions ..............

Oven Cavity Size ..................

Turn Table Diameter ..............

Effective Capacity of

Oven Cavity . .

Net Weight . . .

1330W
91OW
(Adjustable 130Wthrough 910W)
2,450MHz~50MHz
230V-240V,50HZ

6.0 Amp.
Thermal Protector, Open at 122°C
for Cavity
Thermal Protector, Open at 122-C
for Magnetron
Fuse (Cartridge Type 8A)
Primary Interlock Switch
Door Sensing Switch and Relay2
Interlock Monitor Switch
Electronic Digital, up to
99 min. 99 sec.
550(W) x 451(D) x 311(H) mm
375(W) X404(D) x236(H)mm
360mm

32 liters
Approx. 20 kg.

2. POWER OUTPUT MEASUREMENT

NOTE

(c)

(D)

(E)

(F)

(G)

1.

2.

1,

2.

1.

2.

3.

Set cooking time to two (2) minutes. (“2 00’’ appears in
display)
Touch START key and operate oven for exactly two (2)
minutes.
Take out the two bowls at once,

Stir both water with thermometer and measure the water
temperature rise respectively.
Get temperature rise by calculating the difference (water
temperature after cooking minus initial temperature) in
each bowl.
Then calculate average value(t) of both temperature rises
in degrees centigrade.
Then workout;
Power Output (watt) = 70 x

At

Power output shall be in the following range

Average Microwave

temperature rise

Power output

Minimum

10.4”C

728W

Maximum

13.3°C

931W

Power Output will be influenced by line voltage of power
supply. Consequently, correct power output must be
measured within 240 VAC~2volts while unit is operating.

The power output specification, 910Won this model is measured
with IEC measurement. The power output is measured with two (2)
liters water isequivalent to910Win measurement with IEC, when
measured with the following power output.

(A) 1, Fill twotest bowls with eachl Iiter water respectively.

2. Use accurate temperature “C and measure each water
temperature respectively.

(B) Place thetwobowls on glass turntable.

–l–

3. CIRCUIT DIAGRAM

230-240V*50HZ

+

:\21

BL = BR

~._———
IN

‘L;

Ll, L2 - 650LIH

, cl - o.066y F

l~m

r 8.OA(T) , C2, C3 2200PF

CAVITY

11..11

THERMAL PROTECTOR

I

OPENS AT 122+5°C

, C2

w

I

MAGNETRON

L_____ ___J
THERMAL PROTECTOR
OPEN SAT 122+5°C

w

w

INTERLOCK MONITOR

w

INTERLOCK SWITCH

“NO

BK

–1

—

I

II r’

NC

I

COM

Y

w

BLOWER MOTOR

l--y--l

Y

w

Y

w

II

II

~1 1~

I

GEAR MOTOR

II 1/

w

——— -——

“I&J‘

—

CONNECTOR

— — —

——

S201

1

HUMIDITY
SENSOR

RELAY2 z

q’- IBK ~------

9

@l ‘j : ‘R kj!% >:

fl

—

3 ~w ,

1

.—_— ——_

1 000R

+

HIGH VOLTAGE TRANSFORMER

I –––––––––––-

CONNECTOR

S1

—

ITl

I u

I 3

I

“

I 6

“

I

I

I

.—

,

I 1

-1

1~

~ ~

I

El

I

L ______ _. ______( )J

77i-

FUSE DIODE

F FA

R

m

m

o

~

DIODE

h

RELAY 1

STEP DOWN
TRANSFORMER

10–1

c

E

● I

●

1X1,

I

BL

CONNECTOR I

S102 I

CIRCUIT

I

BOARD

CONNECTOR

.I!tm

TOUCH

Slol

KEY

BOARD

— — — ––l

[–––l

7)7 7)7 ,.,”,

CAPACITOR

MAGNETRON

2.1 KV
RESISTOR

— — —

1OMEG-OHM

WIRINGCOLOUR

BR:BROWN
BK: BLACK
0 :ORANGE
BL :BLUE
W :WHITE
Y :YELLOW
R :RED

I

SECONDARY
INTERLOCK

I

I

PRIMARY INTERLOCK DOOR

SWITCH MADE.

INTERLOCK MONITOR

SENSING

I

RELAY 2

I

SWITCH SWITCH SWITCH

CONDITION

COM

CoI/l COM COM

NO

NC NO NO

Parts marked with this sign aresupplied with
high voltage exceeding 250V.

Parts marked with this sign have special
characteristics important for microwave leakage
When replacing any of these parts use only
manufacturers specified parts.

DOOR OPEN

●

DOOR CLOSE ●

●

●

..

–2–

4. TEST PROCEDURES

COMPONENT

TOUCH KEY
BOARD

r

——— ——— .

CHECKOUT PROCEDURE

Measure the resistance between terminals of
FPC connector after removing it from S101.
(Figure 1).

NOTE

- When reconnecting the FPC connector, make

sure the holes on the connector are properly
inserted in hooks of the plastic fastener in S1 01.

MATRIX CIRCUIT FOR

TOUCH KEY BOARD

FPC CONNECTOR

——— ——— ——— —.— ——— —

7

Measure the voltage: Between test points TP-1,
TP-2, TP-3, TP-4 or TP-5 and ground between TP­6 and TP-7. (See control circuit board on page 8.)

CONTROL
CIRCUIT BOARD

NOTE

– Proceed with the check of the step-down trans­former, to see if any one of the measured value is
different from the specified values.

RESULT

Resistance

value

=-E=’

When checking “START” key, connect ohm­meter as illustration below.

ohm-meter

:)’%

-----

-----

I

---- ­~

--- --

I

---- -

I

--- .

---- -

I

----

---- ­~

--- -

I

--- -

---

\

Al

)

A2
A3
A4
A5
c1
C2
c3/
C4
C5

TERMINALS OF FPC CONNECTOR

Figure 1

==El=

Test

TP-5

TP-61

Point

TP-7

=Fl

tl

-15V –25V
DC DC

–3–

5. EXPLODED VIEW AND PART LIST
CAVITY PARTS

*** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING

-­APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS

IDENTIFIED BY A TRIPLE ASTERISK (***)

:ey

io.

1

2
3
4
5
6
7
8

9
10
11

Part No.

6171246377

4110825201
411 1606007
6171385113
411 1606106
6171683295
6171512458
4110105808

6171451399
6171445435
4110110802

“ Item not illustrated

Description

Cabinet (Also order circuit diagram
when replacing Cabinet)
Screw, Truss Hd. Tapping, 4x1 Omm
Screw, TPG TRS + SRT 4x1 Omm
Power Cord
Screw, S-TPG TRS + SRT 4x10mm
Oven Cavity ‘“ (Not service Part)
Gear Motor
Screw, Pan Hd. Machine, 4x1 Omm, Brass
N1
Bottom Plate ‘“

(Not service Part)
Plastic Foot with Canoe Clip
Bolt, Hex Hd. Machine with Spring Washe
& Bolt Washer, 5x14mm, 21‘“

Q’ty

1

11

2
1
1
1
1

2
1
4

2

:ey

40.

12
13
14
15
16
17
18

19
20
21
22
23
24
25
26

,

●

Parl No.

6171240795
4110892500
6171208481
6171444476
6171242416
6171098372
6171621952
6171621938
4110691707
4110076900
6171241235
6170805315
6171281149
6171473865
6171756203
6171821956
6171799538

Description

Hinge, Lower ““”
Washer F 5x1 OXO.8
Insulation Sheet
Turntable Shaft
Roller
Rotating Tray
Antenna
Cavity Cover
Screw, TPG TRS 4x6mm, Stainless
Screw, PAN. HD. Tapping, 3x6mm, Z1
Thermostat, Cavity 122°C
Special Washer
Duct Humidity Sensor
Humidity Sensor
Special Washer
Name Plate
Circuit Diagram

Q’ty

1
1
1
1
1
1
1
1
1

2
1
1
1
1
1

1
1

-4-

SWITCHES AND MICROWAVE PARTS

~Y~

‘\B

@

Parts marked with this sign have special

characteristics Important for microwave leakage
When replaclng any of these parts use only
manufacturers specified parts.

*** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING

APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS

IDENTIFIED BY A TRIPLE ASTERISK (***)

[ey Part No.

Description

Q’ty

~o.

1 4110825201

Screw, Truss Hd, Tapping, 4x1 Omm 6
2 6171685657 H.V.Transformer, N5T-S829ML 1
3 6171621945

Stay, Cavity & Magnetron

1

4

4110076900 Screw, Pan Hd. Tapping, 3x6mm, C2 1
5 6171241235 Thermostat, Magnetron, 122-C 1
6 4150019301 Magnetron, 2M218H (N) ‘“ 1
7 4230227503 Fuse, 250V 8A 1

8
9 6171451627

Lead Wire Ass’y (including Diode)

1

10

6171621990 Space Parlitlon (Blower) 1

11

6171449716 High Voltage Capacitor including Resistor,

1

l.luf 2.1 KV

12

6171622041 Capacitor Band 1

13

4110115609 Bolt Hex 4x1O 21 4

14

6171621983 Duct, Msg. Exhaust 1

15

6171103618 Lamp, 240V 25W 1

16

6171241280 Lamp Socket 1

17

6171305685 Blower Motor 1

(ey
Vo.

18

19
20
21
22

23
24
25
26
27
28
29
30

31
32
33

Parl No.

4110772109
6170751179

6171241181
6171670523
6170045575

6171670523

6171241174
411 1025907

6171173505
6171405354
6171778311
411 1606106

6171325713

Description

Screw, Tapping, Bin 4x20mm
Blower Fan
Latch Lever ‘“
Micro Switch, Primary Interlock V-5P030FB ‘“’
Micro Switch, Interlock Monitor
V-5220DZ ‘“
Micro Switch, Door Sensing V-5P030FB”*

Lever Stopper ‘“’
SCR E-TPG TRS + TW 4x10mm

Harness, Door Sensing
Lead Wire Ass’y
P,C.B, Comp

SCR.S.TPG + TRS 4

X 10

Insulation Sheet

Q’ty
—

2
1
1
1
1

1

1
2

1
1
1
1

1

–5–

DOOR PARTS

--

4 ***

1(-J***

9 ***

*** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING

APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS

IDENTIFIED BY A TRIPLE ASTERISK (***)

(ey

Part No. Description Q’ty

tie.

1

6171520934

Door Cover ‘“

1

2 6171520941

Door Panel ““

1

3 6171365908

Door Main Frame (White) ‘-” (Also order 1
Door Sheet when replacing Door Main
Frame)

4

6171520958 Choke Dielectric ‘“

1

5 6171246483

Door Sheet

1

6 4110541903

Nut, Hex. Hd. with Washer, 5mm

● *’ 2

<ey
No.

7
8

9

10

Part No.

6171240955

4110110802

617101 1494
617101 1487

Description

Hinge, Upper ‘“

Bolt, Hex. Hd, Machine with Spring
Washer and Bolt Washer, 5x14mm,
ZI “+
Spring ““
Door Latch ‘“

Q’ty

1
2

1
1

.

–6–

CONTROL PANEL PARTS

2 ***

1

1 ***

\

3

6

\

8 ***

11 ***

*** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING

APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS
IDENTIFIED BY A TRIPLE ASTERISK (***)

(ey
’40.

1

2

3
4
5
6

Parl No.

6171762075

6171623512

6171514346
6171521030

411 1606205

Description

Control Sheet ‘“ (Also order Touch Key
Board when replacing Control Sheet)
Touch Key Board ‘“ (Also order Control
Sheet when replacing Touch Key Board)
Control Plate
Control Frame ““

Screw, Tapping, TRS + SRT 4x10mm

PRINTED MATTER (Items Not Illustrated)

Q’ty

1

1

1
1

1

+

Key Part No.

No.

6171762099
6171461077
6171621970

Description

Q’ty

I

I

I

(ey Parl No.

Description

Q’ty

Vo.

7 6171623161

Control Base Ass’y ‘“ 1

6 6171756672

Control Clrcult Board Complete ‘“ 1

9 411 1295605

Screw, Bind Hd. Tapping, 3x1Omm, Z1 2

10 6170809559

Spring, Door Release Lever 1

11 6171514339 Door Release Lever ‘“’

1

–7-

CONTROL CIRCUIT BOARD
(Part No. 617175 8672)

(14500) C-O

AH CS-40 94v-()@*

\

o

I

—.—————

———————————

,,,1~:: [===1 +%

J101

‘; e

.=

R127\

UI

m ‘

’26m

o

~fia ;

z

,23m

D!

Q .

—\ --81

.
>

0

I05
113

Cj

o

>IJ

)

*—

0

m

1-

0

—

\

/

\

---

o

TP-6
TP-7

TP-4

TP-I

GROUND

TP-2

TP-5

TP-3

–8–

6. OVERALL CIRCUIT DIAGRAM

L

R143
10K

11

P611ANI

P601AN0

P50

P71

P70

CN

P45 ~

N
w

z

P477r3 J

‘46/T

355
J54 ­J53 ­352

0

~51 —

‘67(AN7

’27

’26

’25

’24

=

~41/lNTl
‘40/1 NTO

(RFF
(Cc

I

L

R142

------ ------

I

I

10K

SI02 I

1:

----- ----- ----- --­I
I

k

,oKm :

DIOI 1SS132

I

RIOIU

/50Vk’

m

18

I

I

I

DOOR

J L

SENSING

D102

–5V I

I

SWITCH

1N4002 470<> 470<2

I

I ~QQ~

- - ‘l~K- ‘1

Q1OI

I
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[ CIRCUIT

I

I

I
~-----

OPENd

I
I

I
I

I
I

RI04
270

I

AC230 240V

50Hz

*

P

SWITCH

BLOWER

MOTOR

GEAR

MOTOR

r-t-a

y~

:

RL2

INTERLOCK

MONITOR

SWITCH

I
I

1

I
I

I
I
I
I
I
I

I

I

I

C!I03 DTA143X I

RL2

Q102
C3330

I

DI04

I

1SS132

I
1

RLI

RI06
3300

1

I

, MAIN
, CONTROL
, CIRCUIT

L-----.–----L- ------- L------ -2

I
I
I
I BUZZER

i DRIVE

is’fls!’l ---

R116 4 7K

Q104 DTA143X 1

‘--l~K-’ 1

RIIO

I

33K

I

,1”

BZI

L --—- .

R109

I

-15V

IK

I

---- -——- ---- ---- ---- _
,.

M

‘B

●

~11
II

,4+- , 1 -

I

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MAGNETRON

.

—

1-

1
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---- --—

KEY
BOARD
CIRCUIT

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(1) (2)

(3)

(4)

016

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,---

1
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POTATO

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R1254,, lK

34

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R126.,, lK

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---- ---- ---- _

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FISH

FILET

.

---- --- --- --- --- --- __

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C106

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4,7K

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-5V

Q11 A564A

— –,,,, b -5V

----- ----- --

i

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x

–15V

ZD12

gl

C12 +:

RD27ESBI

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R12

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-25V

D12

ZD13

s3j

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RD39ESB2

“1

R131,,220Q

VF

R15 IOK

R14’’”22OQ

PI

S4

VF

--------

POWER

PT1 P05M V690

SUPPLY

---- ---- ---- ---- ---- ---- ---- .
CIRCUIT”---- -

INITIALIZATION I

D106

CIRCUIT

:%
CIRCUIT

I

I
I
I

---- ---- ---- ---- ---- --

–9–

P30
P31
P32
P33
P34
P35

P62/AN2

(PD) P17
(PD) P16
(PD) P15
(PD)P14
(PD)P13
(PD) P12
(PD) Pll

(PD) P1O
(PD)P07
(PD) P06
(PD) P05
(PD) P04
(PD) P03
(PD) P02
(PD) POI
(PD) POO

VEE

P37

P36

P66/AN6

P65/AN5

P64/AN4

P63/AN3

P44

P43

P42
P20

P21
P22
P23

XIN

XOUT

Vss

AVSS

---- ---- ---- ---- -— -- ---- ---- —--- ---- ---- ---- --

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OPEN

I________ –______ ---------------

a

j7 R128

10K

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R137 IOK

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DISPLAY :

TUBE

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CIRCUIT :

---— --—- —-—- —--— -

–lo–

.—

Wf!’’’o’o

December ‘95/1 00 LT Printed in Singapore

SANYO Electric Co., Ltd.

Osaka, Japan.