Samsung SMH7177STE Service Manual Download

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8-2 P.C.B Parts List

Level

Code No.

Description

Speciﬁcation

Q’ty

SA/SNA Remark

1-2

RAS-OTR7HV-04 ASSY PCB PARTS

SMH7178,120V/60HZ

1-3

2011-000777

R-NETWORK

47Kohm,5%,1/8W,A,SIP,8P,TP

SNA

AR01

1-3

3501-000256

RELAY-POWER

110V,1200VA,10000MA,-,10MS,1

SNA

RY04

1-3

3501-001155

RELAY-MINIATURE

24VDC,200MW,3000MA,1FORM

RY11

1-3

3708-001550

CONNECTOR-FPC/FC/PIC

16P,1.25mm,STRAIGHT

SNA

CN01

1-3

3711-000024

CONNECTOR-HEADER

BOX,3P,1R,2.5mm,STRAIGH

SNA

CN04

1-3

3711-000879

CONNECTOR-HEADER

BOX,3P,1R,2.5mm,STRAIGH

SNA

CN05

1-3

3711-000999

CONNECTOR-HEADER

BOX,5P,1R,2.5mm,STRAIGH

SNA

CN02

1-3

3711-004200

CONNECTOR-HEADER

BOX,4P/7P,1R,2.5MM,STRA

SNA

CN03

1-3

3711-004201

CONNECTOR-HEADER

BOX,6P/9P,1R,2.5MM,STRA

SNA

CN06

1-3

DE07-10035A

V.F.DISPLAY

SVM-07SS10,SEA,-,-,-,-

DSP1

1-3

DE26-20144A

TRANS-L.V

SLV-5574U,120V,60HZ,AC17V/2.7V

LVT1

1-3

DE30-20016A

BUZZER

CBE2220BA,STICK,-,-,-,-,-,-,-

SNA

BZ01

1-3

DE92-01674A

ASSY PCB AUTO

-,-,RAS-OTR7HV-04,120V60HZ

SNA

1-4

0401-001002

DIODE-SWITCHING

1N4148M,100V,200mA,DO-34

SNA

D28

1-4

0402-001103

DIODE-RECTIFIER

1T4,400V,1A,TS-1,TP

SNA

D25

1-4

0403-000355

DIODE-ZENER

UZ5.1BSB,5-5.2V,500MW,DO-35,

SNA

ZD05

1-4

0504-001044

TR-DIGITAL

KRA226M,PNP,400MW,2.2K/10K,TO

SNA

TR10

1-4

0504-001178

TR-DIGITAL

KRC246M,NPN,400MW,2.2K/10KOHM

SNA

TR17

1-4

1201-001125

IC-OP AMP

75S01,SOP,5P,63MIL,SINGLE,100D

IC04

1-4

1203-001238

IC-POSI.ADJUST REG.

78L15,TO-92,3P,-,PLA

SNA

IC02

1-4

1404-000230

THERMISTOR - PTC 27OHM

20%

SNA

PTC1

1-4

1405-000001

VARISTOR

470V,1250A,14x7.5mm,TP

SNA

ZNR1

1-4

2001-000009

R-CARBON

20KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R12

1-4

2001-000062

R-CARBON

470OHM,5%,1/4W,AA,TP,2.4X6.4MM

SNA

R22

1-4

2001-000273

R-CARBON

100KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R27

1-4

2001-000290

R-CARBON

10KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R44

1-4

2001-000429

R-CARBON

1KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R19

1-4

2001-000446

R-CARBON

2.2KOHM,5%,1/2W,AA,TP,3.3X9MM

SNA

R10

1-4

2001-000577

R-CARBON

2KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R43

1-4

2001-000786

R-CARBON

47KOHM,5%,1/8W,AA,TP,1.8X3.2MM

SNA

R34

1-4

2004-000218

R-METAL

10Kohm,1%,1/8W,AA,TP,1.8x3.2mm

SNA

R24

1-4

2004-001978

0R-METAL

300OHM,1%,1/8W,AA,TP,1.8X3.2MM

SNA

R45

1-4

2004-005091

R-METAL

249KOHM,1%,1/8W,AA,TP,1.8X3.2MM

SNA

R29

1-4

2203-000192

C-CERAMIC,CHIP

100nF,+80-20%,50V,Y5V,TP,

SNA

C15

1-4

2203-000260

C-CER,CHIP

10nF,10%,50V,X7R,TP,2012

SNA

C13

1-4

2203-000889

C-CERAMIC,CHIP

4.7NF,10%,50V,X7R,TP,2012

SNA

C11

1-4

2401-000244

C-AL

100uF,20%,10V,GP,TP,6.3x7,5

SNA

C05

1-4

2401-000911

C-AL

22uF,20%,16V,GP,TP,5x7,5

SNA

C06

1-4

2401-001415

C-AL

470uF,20%,35V,GP,TP,10x20,5

SNA

C03

1-4

2401-001573

C-AL

47uF,20%,50V,GP,TP,6.3x11,2.5

SNA

C02

(S.N.A : SERVICE NOT AVAILABLE)

Summary of Contents for SMH7177STE

Page 1: ...E OVEN CONTENTS SMH7177STE SEA 1 Precaution 2 Speciﬁcations 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignment and Adjustments 6 Troubleshooting 7 Exploded Views and Parts List 8 PCB Diagrams 9 Schematic Diagrams 10 Reference ...

Page 2: ... 4 8 1 Removal of Control Box 13 4 8 2 Removal of P C B Assembly 13 5 Alignment and Adjustments 14 5 1 High Voltage Transformer 14 5 2 Low Voltage Transformer 14 5 3 Magnetron 14 5 4 High Voltage Capacitor 15 5 5 High Voltage Diode 15 5 6 Main Relay and Power Control Relay 15 5 7 Adjustment of Primary Switch Door Sensing Switch and Monitor Switch 15 5 8 Vent Exhaust Blower Motor 16 5 9 Thermal Cut...

Page 3: ...ction 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 transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the...

Page 4: ...o compliance CENTRAL SERVICE CENTER 10 Service technicians should remove their watches while repairing an MWO 11 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary interlock switches interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all o...

Page 5: ...r wiring always unplug the oven and discharge the high voltage capacitor See Figure 1 1 2 The high voltage capacitor remains charged about 30 seconds after disconnection Short the nega tive terminal of the high voltage capacitor to the oven chassis Use a screwdriver 3 High voltage is maintained within speciﬁed limits by close tolerance safety related components and adjustments If the high voltage ...

Page 6: ...AVITY DIMENSIONS OUTSIDE DIMENSIONS NET WEIGHT SHIPPING WEIGHT 99 MINUTES 99 SECONDS 120VAC 60Hz MICROWAVE 1 650W FROM 100 TO 1100W 10 LEVEL POWER IEC 705 TEST PROCEDURE 2 450MHz OM75P 10 ERHN COOLING FAN MOTOR 207 8 W x 109 32 H x 141 32 D mm 297 8 W x 1515 16 H x 165 32 D mm 58 4 lbs 64 4 lbs 2 1 Table of Speciﬁcations ...

Page 7: ...3 Sensor Cook Buttons 4 Handy Helper Kids Meals Snack Bar 5 More Less 6 Number Buttons 7 Power Level 8 Clock am pm 9 Light On Night Off Button 10 Turntable On Off Button 11 One Minute 12 My Choice 13 Custom Cook 14 Start 15 Kitchen Timer 16 Pause Cancel 17 Help 18 Vent Fan Turbo Hi Low Off Button 3 1 Control Panel ...

Page 8: ... 5 Door Door Key Handle Ventilation Holes Oven Light Safety Interlock Holes Control Panel Grill Intake Holes Glass Tray Guide Roller 758 8mm 404 8mm 410 3mm 3 2 Features External Views ...

Page 9: ...ed you are supplied with several accessories that can be used in a variety of ways Registration Card Top Template Owner s Manual Roller Guide Ring Exhaust Adaptor Grease Filters Shelf Charcoal Filter Glass Tray Installation Instructions Hardware Kit Wall Template ...

Page 10: ...inet arrangements such as an island or peninsula It must be mounted to both a top cabinet and wall 3 4 2 Vent Blower The vent or exhaust blower is located at the top of the oven It is shipped for vertical exhaust but can be changed to rear exhaust or recirculating See installation instrustions on how to change and or blower section on how to remove 3 4 3 Cooltop Lights One 40 watt screw base incan...

Page 11: ...n will automatically turn off when the internal parts are cool If may stay on for 30 minutes or more after the cooktop and microwave controls are turned off 3 5 3 Grille Removal The top full width grille is removable for service to some components such as oven light cavity T C O vent motor capacitor and fuse TO REMOVE GRILLE 1 Disconnect oven power 2 Remove screws 2 from grille outer case 3 Lift o...

Page 12: ...4 Screws from the H V Trans 8 Take out the H V Trans 4 2 Replacement of Magnetron Remove the magnetron including the shield case permanent magnet choke coils and capacitors all of which are contained in one assembly 1 Disconnect all lead wires from the magnetron 2 Remove nuts 4 securing the magnetron to the wave guide 3 Take out the magnetron very carefully NOTE 1 When removing the magnetron make ...

Page 13: ... E Following the procedure as shown in the ﬁgure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound Insertion depth of the thin metal plate should be 0 5mm or less 4 3 3 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key door Door A Door C Door E Key Door Spring Door E ...

Page 14: ...lignment 2 Adjust so that the door has no play between the inner door surface and oven front surface If the door assem bly is not mounted properly microwave energy may leak from the space between the door and oven 3 Do the microwave leakage test After replacement of the defective component parts of the door reassemble it and follow the instruc tions below for proper installation and adjustment so ...

Page 15: ... motor screws 1 and lift up stirrer motor after turn left The stirrer is located on the upper side of the cavity The oven uses a top feed wave guide 1 Disconnect power and open the door 2 Remove the clip and turn the stirrer cover left 3 Remove stirrer cover and the stirrer will come with it 4 Replace the clip if the clip head broken CLIP COVER STIRRER STIRRER ASSEMBLY COVER STIRRER STIRRER MOTOR ...

Page 16: ...ct the connectors from the control circuit board 4 8 2 Removal of P C B Assembly 1 Pull the lever end of the plastic fastener and remove the Flexible Printed Circuit FPC of membrane panel 2 Remove screws 3 securing the control circuit board 3 Lift up the control circuit board from the Ass y control box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly eng...

Page 17: ... open ﬁlament or a shorted magnetron To diagnose an open ﬁlament or shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting its leads 3 A continuity check across the magnetron ﬁlament terminals should indicate one ohm or less 4 A continuity check between each ﬁlament terminal and magnetron case should read open 1 The low voltage transformer is located on the control circuit boa...

Page 18: ... Latch Body to the oven assem bly adjust the Latch Body by moving it so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten the screws holding the Latch Body to the oven assembly 4 Reconnect to Monitor switch and check the continu ity of the monitor circu...

Page 19: ...ould be much slower TO TEST THE CAPACITOR 1 Remove grille discharge capacitor and disconnect one capacitor lead 2 Make appropriate capacitor check with analog meter needle should rise then fall cap is charging then discharging TO TEST BLOWER WINDINGS 1 Disconnect power and remove grille 2 Open control panel and discharfe capacitor 3 Disconnent two wires to run capacitor Continuity test across the ...

Page 20: ... the oven cavity beside exhaust duct with a temperature rating of 248OF 120OC and is non resetable The cutout is tightly held to the top of the oven cavity by duct upper 5 9 2 Replacement of Flame Sensor Disconnect oven power Remove Grille Panel outer 1 Remove screws 3 securing the duct upper 2 Loft up the duct upper from the cavity 3 Disconnect two wire leads 4 Press the top of the thermal cutout...

Page 21: ... is during an overheat condition It will be normally open when checked with an ohmmeter 5 9 4 Magnetron Thermal Cutout THIS COMPONENT REQUIRE REMOVAL OF MICROWAVE OVEN FROM INSTALLATION FOR SERVICING During a ﬁre on the stove the heat could be intense enough to close the Hood Thermal Cutout and force the fan to run While at moderate high temperature we do want it to run however during a ﬁre it is ...

Page 22: ...play Numbers approximate 15 185 Normal verify with detection test 213 or Higher Sensor failed to open sensor unplugged wiring or smart board Less then 6 shorted sensor or smart board NOTE Only heater terminals H Black and Red leads can be checked with ohmmeter 30Ω CAUTION DO NOT ATTEMPT TO CHECK SENSOR TERMINALS White and Orange leads CAN DAMAGE SENSOR Power Defrost Sensor Reheat Pause Cancel pota...

Page 23: ...water again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise T 6 The output power is obtained by the following formula Output Power 4 187 x 1000 x T 0 55xMcx T2 T1 38 Heating Time sec 41 Counting Time sec 4 187 Coefﬁcient for Water 1000 Water cc T Temperature Rise T2 T1 To Room Temperature Mc Cylindrical borosilicate glass weig...

Page 24: ...or seam is taken near a corner of the door keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 5cm to any metal If it gets closer than 5cm erroneous readings may result 5 Measured leakage must be less than 4mW cm2 after repair or adjustment Maximum allowable leakage is 5mW cm2 4mW cm2 is used to allow for measurement and meter a...

Page 25: ...Timer starts countdown but no microwave oscillation No heat while oven lamp and fan motor turn on 1 Off alignment of latch switches 2 Open or loose connection of high volt age circuit especially magnetron ﬁla ment circuit NOTE Large contact resistance will bring lower magnetron ﬁlament voltage and cause magnetron to lower output and or intermittent oscillation 3 Defective high voltage components H...

Page 26: ...1 Loose fan and fan motor 2 Loose screws on H V Transformer 3 Shorted H V Diode Tighten screws of fan motor Tighten screws of H V Transformer Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor 2 Defective turntable motor Replace turntable motor Oven stops operation dur ing cooking 1 Open or loose wiring of primary inter lock switch 2 Operation of thermal cu...

Page 27: ...or respectively 4 For unusual cases errors can be indicated in letters after discussion in advance ex Key Short Error SE 5 Error code not mentioned below should be discussed in advance and approved by P L and numbered reported to relevant departments 6 This numbering rule has been applied to models to have been developed since January 1 2005 But GE or Customize model are excluded E 1 1 DEVICE 0 Ot...

Page 28: ...D in ﬁrst 3 minutes after cooking by heater starts Error Code Gas Sensor Error Case E 1X E 31 Open When value of HEX is above FF for 5 seconds E 32 Short E 33 In case the initial value of HEX is under 14 for 30 seconds while a weight sensor in operation E 34 In case the initial value of K calculated by a weight sensor is above and under 28 as value of HEX E 35 In case the value of A is as a weight...

Page 29: ...ter SE Key Short Error 10 seconds E 01 The door opens in case the door should not be opened E 02 Cooking Time Setting Over Error MWO E 03 Cooking Time Setting Over Error Grill E 04 Cooking Time Setting Over Error Convection E 05 Cooking Time Setting Over Error Combination E 06 It fails to sense that the swing heater has stopped for 20 seconds during cooking E 08 In case function of MWO starts with...

Page 30: ...015 P013 P014 P001 P039 P032 M015 M001 M035 M029 M021 M023 H018 M017 P109 M040 M039 M041 M206 P059 M049 B002 B001 B013 U004 U007 U001 P122 P123 M038 P121 M048 M155 M036 U003 P012 P006 M024 M060 C004 D049 C082 C005 C001 C009 P156 C073 W022 W023 R066 C003 D024 D037 D005 D004 D006 P125 P007 P007 H032 P098 P178 P112 P179 P113 P117 P099 M067 P208 P104 P100 P102 M068 P106 M149 M149 P101 D019 D002 D060 D...

Page 31: ...LASS T6 1 SA 1 1 P012 DE92 90242A ASSY HOOD DAMPER JVM 250BL OTR4 1 SA 1 2 P013 DE71 60051A COVER DAMPER FESN5 T0 22 W68 L248 4 1 SA 1 2 P014 DE72 40022A DAMPER MAIN SECC W28 L650 OTR4 T0 1 SA 1 1 M060 DE92 90505E ASSY HARD WARE SMH7175 1 SA 1 1 P032 DE92 90508A ASSY HOLDER NUT OTR6 1 SA 1 1 B018 DE96 00082C ASSY BODY LATCH SMH7175WE XAA 1 SA 1 2 B002 3405 001033 SWITCH MICRO 125 250VAC 16A 200GF ...

Page 32: ...97 00181A ASSY CAM LOUVER JVM 1860 ASSEMBLY 1 SA 1 3 P178 3405 001050 SWITCH MICRO 125V 0 1A 60GF SPNC 1 SA 1 3 P179 3405 001051 SWITCH MICRO 125V 0 1A 60GF SPNO 1 SA 1 3 H032 DE31 10154C MOTOR DRIVE M2CK59ZT69 H 120V60HZ 1 SA 1 3 W023 DE39 00253A WIRE HARNESS CAM JVM 1860 1 SA 1 3 P112 DE61 00118A BRACKET CAM PLATE JVM 1860 SCP T2 0 W60 1 SA 1 3 P113 DE72 00145A CAM LOUVER JVM 1860 POM KEPITAL FE...

Page 33: ...00244A EARTH GRILLE SMV9165 STS301 T0 15 W13 5 1 SA GRILLE 1 2 M068 DE64 01294A GRILLE SMH7178 PC T2 5 W75 L757 BLK 1 SA 1 2 P101 DE97 00497A ASSY COVER GRILLE SMH7178 CHASSIS BKT C 1 SA 1 3 P102 DE61 00150A BRACKET BARRIER GR JVM 1860 SECC T0 5 1 SA GRILLE 1 3 P117 DE61 00672A BRACKET COVER GRILLE SMH7178 SECC T1 2 W 1 SNA 1 3 P208 DE64 01296A CHASSIS GRILLE SMH7178 STS430 4 T0 5 W7 1 SNA 1 1 M03...

Page 34: ...4 01292A SCREEN DOOR B SMH7178 TEMP GLASS T3 2 W 1 SA 1 3 D002 DE64 01295A DOOR A SMH7178 PC T2 5 L619 W327 BLK 1 SA 1 1 C082 DE94 01120D ASSY CONTROL BOX 120V 60HZ SMH7178STE XA 1 SNA 1 2 C089 DE39 40673A WIRE HARNESS H 120V60HZ OTR6 ALL MODEL G 1 SA 1 2 C009 DE64 00766B WINDOW DISPLAY 4150 SAN T2 0 W37 L84 YEL 1 SA 1 2 C001 DE94 01119A ASSY CONTROL PANEL 120V 60HZ SMH7178 BLK 1 SA 1 3 C005 DE64 ...

Page 35: ...10111A SCREW LAG MSWR W1 4X50 1 SA 1 2 DE60 20022A BOLT TOGGLE MSWR W3 16X75 3 SA 1 2 DE60 20066A BOLT FLAT UNF1 4 L110 MSWR10 OTR6 3 SA 1 2 DE60 30022A NUT TOGGLE SBC1 ZPC2 WHT 3 SA 1 2 6002 000643 SCREW TAPPING TH 2S M4 L10 ZPC YEL SW 2 SNA 1 2 DE60 10051A SCREW TAP PH MSWR PH M4 L6 1 SA 1 2 6002 000630 SCREW TAPPING PH 2S M3 L8 ZPC YEL SWR 1 SNA PCB 1 2 DE60 10045A SCREW TAP PH FEFZY PH M3 L6 1...

Page 36: ...DB4DW 47K R35 DGND C02 1000uF P11 9 P12 10 P13 13 19 P14 15 P15 P16 12 P2 7 16 P3 14 P4 17 P5 P6 4 P7 5 P8 6 P9 8 27 4G 28 5G 29 6G 30 7G F11 1 F12 2 F21 32 F22 33 NP 1 20 NP 2 21 NP 3 22 NP 4 23 P1 11 18 P10 5V DSP1 SVM 07SS25 24 1G 25 2G 26 3G KRC246 TR13 R61 47K 47K R60 R53 47K 47K CBE2220BA BZ01 DGND DGND R59 2K R51 RY07 FTR F3AA024E 4 7uF C09 22uF C06 MM4148 D07 D02 GF1G CN02 3 5 1 7 CN05 SMW...

Page 37: ...R DIGITAL KRC246M NPN 400MW 2 2K 10KOHM 14 SNA TR17 1 4 1201 001125 IC OP AMP 75S01 SOP 5P 63MIL SINGLE 100D 1 SA IC04 1 4 1203 001238 IC POSI ADJUST REG 78L15 TO 92 3P PLA 1 SNA IC02 1 4 1404 000230 THERMISTOR PTC 27OHM 20 1 SNA PTC1 1 4 1405 000001 VARISTOR 470V 1250A 14x7 5mm TP 1 SNA ZNR1 1 4 2001 000009 R CARBON 20KOHM 5 1 8W AA TP 1 8X3 2MM 1 SNA R12 1 4 2001 000062 R CARBON 470OHM 5 1 4W AA...

Page 38: ...B MAIN RAS OTR7HV FR 1 1 T1 6 197 19 1 SNA 1 4 1203 001037 IC VOLTAGE REGULATOR 78L05 SOT 89 3P 185 1 SNA IC05 1 4 2401 002216 C AL 2200uF 20 35V GP TP 16x25 7 5 1 SNA C01 1 4 2004 005092 R METAL 348KOHM 1 1 8W AA TP 1 8X3 2MM 1 SNA R30 1 4 DE13 20009A IC KA7533 DIP 1 SNA IC03 1 4 2001 000780 R CARBON 470OHM 5 1 8W AA TP 1 8X3 2MM 2 SNA R02 1 4 2004 004255 R METAL 3 32KOHM 1 1 8W AA TP 1 68X3 81 1...

Page 39: ... 36 9 Schematic Diagrams 9 1 Schematic Diagrams This Document can not be used without Samsung s authorization ...

Page 40: ...ON BUILT IN B RB USA RV BUILT IN USA Junior SJ SJ USA Junior MWO USA OTR SM SOLO H SMH USA OTR SOLO CONVECTION V SMV USA OTR CONVECTION EUROPE Epoxy Cavity M SOLO 1 M1 EUROPE SOLO EPOXY CAVITY GRILL 2 M2 EUROPE GRILL EPOXY CAVITY EUROPE Ceramic Enamel CE SOLO 1 CE1 EUROPE SOLO CERAMIC ENAMEL GRILL 2 CE2 EUROPE GRILL CERAMIC ENAMEL EUROPE Quartz GRILL G2 G2 EUROPE Quartz GRILL EUROPE Power Grill PG...

Page 41: ...EDIUM LOW This function is used to cook the food slowly Close the door completely Press the Cancel button Press the Start button Contact the nearest Samsung after sales service center Ground Ground problem may happen when the oven is placed in a humid area and the over is not grounded Ground is not provided by an extended electric outlet If the oven is placed in a humid area buy an electric wire i...

Page 42: ...uch as herbal remedies are not removed Error Errors are classiﬁed into the case which is out of order and the case which is not out of order Clean the inside of the oven Remove strange smell through the Deodorant button If the strange smell still remains place a piece of lemon on the turntable and operate the oven for 5 minutes by pressing the Deodorant button However the smells produced from the ...

Page 43: ...al is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law Samsung Electronics Co Ltd July 2005 Printed in Korea Code No DE68 03934A ...

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