Assessments - 3, GPA: 3.3 ( )

Fabricante : Daewoo Arquivo Tamanho: 686.67 kb Arquivo Nome : Língua de Ensino:

CIRCUIT CHECK PROCEDURE 1. Low Voltage Transformer check • The low voltage transformer is located on the P.C.B. • Measuring condition: input voltage : 120V/Frequency : 60Hz Terminal Voltage LOAD NO LOAD 4-7 AC 12.6 V AC 14.7 V NOTE : 1. Refer to Circuit Diagram (point 4). 2. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage. 3. The allowable tolerance of the secondary voltage is within ± 5% of nominal voltage. 2. Voltage check • Key check point NO CHECK POINT REMARK 1 IC 1 PIN 2, 21, 30, 34 -5 VDC 2 IC 1 PIN 35 T:16.7ms(60Hz) 3 IC 1 PIN 31 OR 32 T:250ns(4MHz) • Check method NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC -5V±0.25V Replace VL1, EC1 NO LOAD 2 MP2 DC -12V±2.0V Replace EC2, D12, 13, 14 NO LOAD NOTE : Each measure point must be measured with GND points. 26 Measure Point 27 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor do not rotate, but cook indicator in display comes on. * Cause : RELAY 2 does not operate. refer to Circuit Diagram (Point 3) -Check method STATE POINT A B RELAY 2 ON -5VDC GND RELAY 2 OFF GND -12VDC 2) When touching START pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. * Cause : RELAY 1 does not operate. refer to Circuit Diagram (Point 2) -Check method STATE POINT A B RELAY 1 ON -5VDC GND RELAY 1 OFF GND -12VDC 4. When the door is opened during operation, the count down timer does not stop. refer to Circuit Diagram (Point 1) -Check method STATE POINT A B 1) DOOR OPEN OPEN -5VDC 2) DOOR CLOSED CLOSE GND CHECK NO METHOD REMEDY 1 Check the stage (ON, OFF) of the door open monitor switch by resistance measurement. Replace door open monitor switch. 5. When the digital clock does not operate properly. refer to Circuit Diagram (Point 5) POINT WAVE FORM A T:16.7ms(60Hz) * If clock does not keep exact time, you must check resistor R15, 16 zener diode ZD1. 28 29 2. PCB CIRCUIT DIAGRAM 1) KOR-631G0A/631H0A/631H9A/631G9A 4 Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(3. P.C.B. LOCATION NO. 1) KOR-631G0A/631H0A/631H9A/631G9A NO. NAME SYMBOL SPECIFICATION PART CODE Q'TY 1 BUZZER BZ1 BM-20K 3515600100 1 2 C ARRAY CA1 7P(6) 102 M 50V CN6XB-102M 1 3 CAPACITOR ELEC EC1 25V RSS 100uF CEXE1C101V 1 4 CAPACITOR ELEC EC2 25V RSS 1000uF DEZF1E102V 1 5 CONNECTOR WAFER CN1 YW396-02AV 3519150520 1 6 CONNECTOR WAFER CN2 YW396-05AV 3519150510 1 7 CONNECTOR WAFER CN3 FCZ254-11 441M367160 1 8 DIODE RECTIFY D1~6, 9~12 1N4148 DZN4148--10 9 DIODE RECTIFY D13, 14 1N4002A DZN4002A-2 10 DIODE ZENER ZD1 MTZ 5.1VB 1/2W DZTZ5R1B-2 11 DIODE ZENER ZD2 MTZ 3.9VB 1/2W DZTZ3R9B-1 12 LED DISPLAY DP1 DDG-631H DDDG631H-1 13 PCB MAIN M158 81.5X139.9 3514315410 1 14 R ARRAY RA1 7P(6) 1/8 100K J RD-87X104J 1 15 RESISTOR R1~R7 1/6W 330 5% RD-AZ331J7 16 RESISTOR R8,10,12,14,22 1/6W 1K 5% RD-AZ102J5 17 RESISTOR R11,20,21 1/6W 100K 5% RD-AZ104J3 18 RESISTOR R13 1/6W 100 5% RD-AZ101J1 19 RESISTOR R15~17 1/6W 10K 5% RD-AZ103J3 20 RESISTOR R18 1/6W 1M 5% RD-AZ105J1 21 RESISTOR R19 1/4W 51 5% RD-4Z510J1 22 REGULATOR VL1 MC7905C 1MC7905C-1 23 TRANSISTOR Q1~5, 9~11 KRA-102M TZRA102M-8 24 TRANSISTOR Q6 KTA-1270Y TZTA1270Y1 25 TRANS POWER LVT1 DMR-631P 5EPU035302 1 26 WIRE COPPER J1-J21 1/0.52 TIN COATING 85801052GY 21 27 WIRE COPPER SJ3 1/0.52 TIN COATING 85801052GY 1 28 IC MICOM IC1 TMP47C440BN 13GS862GH0 1 29 RESONATOR CERA CR1 KBR-4.0MSTF 5PKBR40MKS 1 30 SW RELAY RY1 G5G-1A DC12V 5SC0101121 1 31 SW RELAY RY2 O5B-1 DC12V 5SC0101110 1 32 CAPACITOR CERA C6 102 50V Z AXIAL CCZB1H102K 1 33 CAPACITOR CERA C1~5,C7 104 50V Z AXIAL CCZF1H104Z 6 30 4 Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(2) KOR-861G0A/861H0A NO. NAME SYMBOL SPECIFICATION PART CODE Q'TY 1 BUZZER BZ1 BM-20K 3515600100 1 2 C ARRAY CA1 7P(6) 102 M 50V CN6XB-102M 1 3 CAPACITOR ELEC EC1 16V RSS 100uF CEXF1C101V 1 4 CAPACITOR ELEC EC2 25V RSS 1000uF CEXF1C102V 1 5 CONNECTOR WAFER CN1 YW396-02V 3519150520 1 6 CONNECTOR WAFER CN2 YW396-05V 3519150510 1 7 CONNECTOR WAFER CN3 FCZ254-11 441M367160 1 8 DIODE RECTIFY D1~6, 9~12 1N4148 DZN4148--10 9 DIODE RECTIFY D13, 14 1N4002A DZN4002A-2 10 DIODE ZENER ZD1 MTZ 5.1B 1/2W DZTZ5R1B-2 11 DIODE ZENER ZD2 MTZ 3.9B 1/2W DZTZ3R9B-1 12 LED DISPLAY DP1 DDG-631H DDDG631H-1 13 PCB MAIN M158 81.5X139.9 3514315410 1 14 R ARRAY RA1 7P(6) 1/8 100K J RA-87X104J 1 15 RESISTOR R1~R7 1/6W 330 5% RD-AZ331J7 16 RESISTOR R8,9,10,14,22 1/6W 1K 5% RD-AZ102J5 17 RESISTOR R11,20,21 1/6W 100K 5% RD-AZ104J3 18 RESISTOR R13 1/6W 100K 5% RD-AZ101J1 19 RESISTOR R15~...

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