✔ 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(http://svc.dwe.co.
TABLE OF CONTENTS SAFETY INSTRUCTION .................................................................................................... 2 SPECIFICATION ............................................................................................................ 5 CIRCUIT BLOCK DIAGRAM ............................................................................................ 6 ALIGNMENT INSTRUCTIONS............................................................................................
SAFETY INSTRUCTION CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER°ØS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES.
SAFETY INSTRUCTION GRAPHIC SYMBOLS : CAUTION : Do not attempt to modify this product in any way. Unauthorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. Service work should be performed only after you are thoroughly familiar with all of the following safety checks and servicing guidelines. To do otherwise, increases the risk of potential hazards and injury to the user.
SAFETY INSTRUCTION SUBJECT : IMPLOSION 4. Wall and shelf mounted installations using a commercial mounting kit, must follow the factory approved mounting instructions. A receiver mounted to a shelf or platform must retain its original feet(or the equivalent thickness in spacers) to provide adequate are flow across the bottom, bolts or screws used for fasteners must not touch and parts or wiring. Perform leakage test on customized installations. 5.
SPECIFICATION ITEMS TV SECTION VIDEO SECTION GENERAL MODEL DVQ-13/19H1FCN, DVQ-13/19H2FCN STANDARD NTSC-M TUNING SYSTEM Frequency Synthesizer(FS) Tuning System TUNING RANGE VHF : 2 - 13(12) UHF : 14 -69(56) CATV : 1-125(125) ANTENNA INPUT IMPEDENCE 75 ohm Unbalanced AUXILIARY INPUT TERMINAL Front : Video, Audio FORMAT VHS NTSC Standard VCR SYSTEM Rotary 2-Head Helical Scanning Monaural System AUDIO RECORDING SYSTEM Monaural TAPE SPEED SP:33.35mm/sec; EP:11.12mm/sec LP:16.
CIRCUIT BLOCK DIAGRAM 6
CIRCUIT BLOCK DIAGRAM 7
ALIGNMENT INSTRUCTIONS 1. SERVICE MODE ADJUSTMENTS Follow the steps below whenever service adjustment is required. See Table-A. and Table-B to determine if service adjustments are required. 1)How to enter the service mode using the user remote control. w Turn the set on. w Direct the remote control to the reception window of your TV/VCR w Push buttons of remote control in sequence as follows. 1 Z MUTE Z RECALL Z MUTE w Then, the screen will appear as follows.
ALIGNMENT INSTRUCTIONS Table-B MODE DATA ADJUSTMENT ITEMS INITIAL RANGE REMARK S2 Screen Adjustment - - S5: IF CONTROL AGC Auto - - Automatical adjustment Select AGC reference voltage (3.75V) AGC Vol 3.
ALIGNMENT INSTRUCTIONS 2. ASSEMBLY ADJUSTMENTS 1) SCREEN ADJUSTMENT(S2) w Enter the service mode and select service adjustment S2 w You can see the horizontal straight line on the screen w Adjust the Screen Control volume(located on FBT) so that the horizontal straight line on screen may be disappear. w Press the MENU button to exit the screen adjustment mode. 2) FOCUS ADJUSTMENT(S2) w Turn in a local station and the Focus Control volume(located on FBT) for best picture details at light condition.
ALIGNMENT INSTRUCTIONS 4-1.HORIZONTAL CENTER Adjustment w Select H CENTER item, adjust H CENTER data value to obtain proper horizontal centering of the internal cross pattern at the left and right of the screen. 4-2.VERTICAL CENTER Adjustment w Select V CENTER item, adjust V CENTER data value to center the raster properly on the screen. 4-3.VERTICAL SIZE Adjustment w Select V SIZE item, adjust V SIZE data value to proper vertical size as figure 1.
ALIGNMENT INSTRUCTIONS 3. VCR DECK ADJUSTMENTS 1) X-DISTANCE & P2,P3 ADJUSTMENT(S10) w Connect Path JIG to connector PS04, Playback the test tape (DN-2,7KHz) w Connect oscilloscope CH1 to V.SW(PS04 #2),CH2 to PB RF(PS04 #1) and trigger on CH1. w Enter the service mode and select service adjustment S10 w Use the VOL up( U ) button to set ATK Off CEN. w Turn the X-distance screw to maximum of PB-RF. w Use the VOL up( U ) button to set ATK Off MIN and MAX. w If PB-RF is not smooth, adjust P2,P3.
SCHEMATIC DIAGRAM VIDEO VERTICAL 13 AUDIO HORIZONTAL
14 48A96220C1 4859813091 A48AGY13X SPTH-C T0.5 DRN-9200 4857246201 4851941600 EXPLODED VIEW 1.
15 48A96220C1 4859813091 A48AGY13X SPTH-C T0.5 DRN-9200 48572462011 4851941600 EXPLODED VIEW 2.
16 4857246201 ET T0.4 330 246 T1.6 A34KQV42X 4859813091 48A96314C3 SPTH-C T0.5 97P0475800 4851941600 EXPLODED VIEW 3.
17 A34KQV42X 330 246 T1.6 ET T0.4 T025 EXPLODED VIEW 4.
PRINTED CIRCUIT BOARD 18
SERVICE PARTS LIST CAUTION “I“is safety component, so it must be used the same component. " 2 " is recomendable part for stock. ✔ 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(http://svc.dwe.co.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION C412 CCYB2H103K C CERA 500V B 0.01MF K C836 CEXF1H479A C ELECTRO 50V RSM 4.7MF 4X7 C413 CCXB2H102K C CERA 500V B 1000PF K (TAPPING) C888 CH1BFE472M C CERA AC AC400V 4700PF M U/C/V C415 CEXF2C109V C ELECTRO 160V RSS 1MF (6.3X11) TP C889 CH1BFE472M C CERA AC AC400V 4700PF M U/C/V C416 CMYE2D474J C MYLAR 200V PU 0.47MF J C901 CMXL2E104K C MYLAR 250V MEU 0.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION CCS50 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 CS33 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z CCS53 HCQK391JCA C CHIP CERA 50V CH 390PF J 2012 CS39 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP CCS54 HCBK332KCA C CHIP CERA 50V X7R 3300PF K 2012 CS40 CCZB1H223K C CERA HIBK 50V 0.022MF K AXL 52 CCS61 HCBK103KCA C CHIP CERA 50V X7R 0.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION CY32 CEXF1C100A C ELECTRO 16V RSM 10MF 5X7 I301A 4857027100 HEAT SINK SPCC T1.0+SN CY37 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP I301B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN CY39 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP I501 1DCT814B-- IC CHROMA DCT814B CZ01 CEXF1C101A C ELECTRO 16V RSM 100MF (6.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION LS02 5CPZ560K02 COIL PEAKING 56UH K (AXIAL 3.5MM) Q823 TKSA1013Y- TR KSA1013Y (TP) LS03 5CPZ560K02 COIL PEAKING 56UH K (AXIAL 3.5MM) Q826 TKTC3198Y- TR KTC3198Y LU01 5CPZ560K02 COIL PEAKING 56UH K (AXIAL 3.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION R506 RD-AZ201J- R CARBON FILM 1/6 200 OHM J R907 RN01B124JS R METAL FILM 1W 120K OHM J SMALL R507 RD-AZ201J- R CARBON FILM 1/6 200 OHM J RA01 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R508 RD-AZ102J- R CARBON FILM 1/6 1K OHM J RA02 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R511 RD-AZ151J- R CARBON FILM 1/6 150 OHM J RC101 HRFT153JCA R CHIP 1/10 15K OHM J 2012 R518 RD-AZ123J
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION RCS09 HRFT393JCA R CHIP 1/10 39K OHM J 2012 RCU03 HRFT512JCA R CHIP 1/10 5.1K OHM J 2012 RCS10 HRFT103JCA R CHIP 1/10 10K OHM J 2012 RCU05 HRFT512JCA R CHIP 1/10 5.1K OHM J 2012 RCS11 HRFT154JCA R CHIP 1/10 150K OHM J 2012 RCU06 HRFT362JCA R CHIP 1/10 3.6K OHM J 2012 RCS12 HRFT154JCA R CHIP 1/10 150K OHM J 2012 RCU08 HRFT272JCA R CHIP 1/10 2.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DESCRIPTION REMARK RS02 RD-AZ103J- R CARBON FILM 1/6 10K OHM J RT04 RD-AZ331J- R CARBON FILM 1/6 330 OHM J RS13 RD-4Z121J- R CARBON FILM 1/4 120 OHM J RT05 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J RS17 RD-AZ102J- R CARBON FILM 1/6 1K OHM J RT06 RD-AZ472J- R CARBON FILM 1/6 4.
SERVICE PARTS LIST LOC PART CODE PART NAME DESCRIPTION TU01 5800000032 COIL OSC DE0-006 U102 4859719130 TUNER VARACTOR DT5-NF20F X501 5XE3R5795C CRYSTAL QUARTZ HC-49/U 3.579545MHZ 20PPM XS01 5XYR03276C CRYSTAL QUARTZ REMARK 2 LOC PART CODE PART NAME REMARK XS02 5XJ16R000E CRYSTAL QUARTZ HC-49S 16.000000MHZ 30PPM XY01 5XEX3R579B CRYSTAL QUARTZ HC-49U 3.57954M 15PPM TP Z101 5PTSF5241P FILTER SAW TSF5241P Z102 5PXPS45MB- FILTER CERA TPS-4.
IC DESCRIPTION Appendix CAM D CAM C CAM B CAM A REC SAFETY (L) CAP FG IN AMP GND DRUM FG IN DRUM PG IN AMP REF IN AMP REF OUT CTL (-) CTL (+) CTL AMP OUT P8(7) P8(6) P8(5) P8(4)/INT2 P8 (3)/INT1 P8(2)/CPFGAMPOUT CPFGIN /CPFGAMPIN AMPVSS P8(1)/DRFG IN DRPG IN /DRPFG IN AMPVREFIN AMPVREFOUT P8 (0)/C CTL- CTL+ AMPC AMPV CC CTLAMPOUT 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 P11(1) /AN9 AV CC 100 AMP Vcc KEY 0 ANALOG Vcc ICS01 DW37760MOH-BA1(M37760) : IC TIM
IC DESCRIPTION Appendix 1. SYSTEM FEATURE 1) 2) 3) 4) 5) 6) 7) The system for TV/VCR tuning is Frequency Synthesis type. VCR SERVO Controller is interior designed. Closed Caption function is interior designed. Parental Control function is interior designed. On Screen Display function is interior designed.
IC DESCRIPTION Appendix 2. PIN DESCRIPTION Pin Terminal Name Explanation 1 P11(0) KEY 1 IN Power, Ch up/down, Vol up/down 2 P7(7) AGC IN Connect this port to AGC of Tuner. Default voltage :3.75V Variable voltage : 3.25V, 3.5V, 3.75V 3 P7(6) OPTION H(5V) : Parental control M(2.5V) : Child lock L(0V) : None 4 P7(5) DRUM SELECT H(5V) : NTSC 4 head L(0V) : NTSC 2 head 5 P7(4) PATH ADJUST Automatic PATH adjust 6 P7(3) VIDEO ENVELOPE IN Connect this port to 6 pin of IZ01.
IC DESCRIPTION Pin Appendix Terminal Name 26 P4(7) 27 P4(6) 28 P4(5) REC LED H Light up LED(RED) when recording 29 P4(4) TIMER REC LED H Light up LED(GREEN) when ready to programming record. 30 P4(3) MONITOR ON H When CRT on, set "H". 31 P4(2) VCR ON H Recording when CRT off, set "H" 32 P4(1) RELAY ON H When CRT on, relay on during 1sec. 33 P4(0) 34 RESET RESET(L) RESET 35 P3(1) Xcin 36 P3(0) Xcout It uses 32.768KHz Crystal.
IC DESCRIPTION Pin Appendix Terminal Name Remarks 60 P0(4) 61 P0(3) 62 P0(2) OSD B OUT Blue output terminal of OSD image. 63 P0(1) OSD G OUT Green output terminal of OSD image. 64 P0(0) OSD R OUT Red output terminal of OSD image. 65 P10(7) S DATA IIC data I/O.
IC DESCRIPTION Pin 89 Appendix Terminal Explanation DRUM FG IN Drum Frequency Generator signal input. Feed back Drum rotation speed. 90 DRUM PG IN Drum Pulse Generator signal input. Feed back Drum rotation phase. 91 AMP REF IN Control pulse AMP reference input terminal. 92 AMP REF OUT Control pulse AMP reference output terminal. C AMP filter. 94 CTL- Input control pulse when playing. 95 CTL+ Output control pulse when recording. 96 AMP C AMP condenser.
IC DESCRIPTION Appendix IC501 DCT814B(LA76814B) : IC VIDEO PROCESSOR 7
IC DESCRIPTION Appendix ICY01 LA71076M : IC VCR Y/C & AUDIO PROCESSOR 8
IC DESCRIPTION Appendix I801 POWER CONTROL MODULE DPM 001 TI KSE 14 13 12 11 10 6 5 4 3 2 1 PIN NO DESCRIPTION PIN NO DESCRIPTION 1 GATE DRIVE1 10 +12V INPUT 2 OCP 11 POWER CONTROL 3 SOURCE 12 +26 OUTPUT 4 GND1 13 GND2 5 GATE 14 +133V INPUT 6 GATE DRIVE2 9
TROUBLESHOOTING GUIDE Appendix 1. NO POWER Check R802(7W 2.
TROUBLESHOOTING GUIDE Appendix 2. TV PART 2-1) NO PICTURE NG : GO to the figure a Check the waveform of I501 #46 OK : GO to the figure b Check Voltage a 33V 5V Check IF Vcc(5V) U102 TUNER Check Signal Check Reset #5 AFT #6 #10 #65 SDATA #34 VCC Z101 SAW FILT IF OUT #67 SCLK #4 I501 MCLK #71 #35 #36 #38 #44 Check Signal Check Signal b Z502 Check CHROMA Vcc(5V) Check HOR. Vcc(5V) #44 CC527 #43 #18 #19 Check RGB Signal Check Waveform XS02 Check the X-TAL Z502 4.
TROUBLESHOOTING GUIDE Appendix 2-2) NO SOUND NG : GO to the figure c Check the waveform of I501 #1 OK : GO to the figure d Check Voltage c 33V 5V Check IF Vcc(5V) U102 TUNER Check Signal Check Reset #5 AFT #6 #8 #10 #65 SDATA #67 SCLK #3 ICS01 TIMER/SYSCON #37 #71 #72 #35 #36 #38 #9 MCLK #12 MDATA Check FM filter circuit #54 #11 #52 #39 Check Signal XS01 Check SIF Signal XS02 Check the X-TAL Check AGC Voltage #10 I501 #34 VCC Z101 SAW FILT IF OUT If SIF no signal,
TROUBLESHOOTING GUIDE Appendix 2-3) CHANNEL DON’T STOP NG : Loss of signal or weak signal Check the input signal conditions.
TROUBLESHOOTING GUIDE Appendix 2-4) NO COLOR Check CVS waveform Check the voltage #44 C527 Chroma/DEF Vcc #43 Check the voltage L502 RGB Vcc(9V) X501 3.
TROUBLESHOOTING GUIDE Appendix 2-5) NO VERTICAL DEFLECTION Check the voltage #43 L502 5V C508 Check the crystal I501 #38 DCT814B #24 V RAMP ALC filter C507 Check the voltage (2.5V) Check vertical output signal Chroma/DEF Vcc X501 3.58MHz From FBT D404 #23 Vertical IC Vcc(26V) R301 #5 Invert RAMP IN #6 I301 LA7841 #2 OUTPUT Check the waveform VERTICAL D.
TROUBLESHOOTING GUIDE Appendix 2-6) NO ON-SCREEN DISPLAY Check the signal (15,734Hz) Check the signal (60Hz) H.SYNC Check data/clock signal V.
Appendix TROUBLESHOOTING GUIDE 2-7) REMOTE CONTROL DOES NOT OPERATE Check the voltage #1 #100 RESET #34 Vcc(5V) #37 KEY 1 KEY 0 RT01 ICS01 TIMER/SYSCON Vcc(5V) #14 #35 #36 #38 XS01 32KHz IT01 REMOCON PREAMP #39 Check the waveform XS02 16MHz Check the crystal 17
TROUBLESHOOTING GUIDE Appendix 3.
TROUBLESHOOTING GUIDE Appendix 3-2) NO ROTATING DRUM : GO to the figure h Check the Rotating CAPSTAN : GO to the figure i h Check the voltage #58 RESET #34 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 Vcc(12V) #59 D-PWM #77 ICS01 TIMER/SYSCON #36 #38 PS01 DRUM CONNECTOR #3 & #4 D-FG Pulse #89 #35 #2 D-PG Pulse #90 #1 #6 #39 Check D-PG/FG waveform XCS01 32KHz XS02 16MHz Check the crystal If PG/FG no signal, then change the DRUM.
TROUBLESHOOTING GUIDE Appendix 3-3) NO PICTURE PLAYBACK NG : GO to the figure j Check the waveform of ICY01 #27 OK : GO to the figure k j CTL(-) Check CTL(+) Control pulse Check the crystal #94 #95 #97 #39 Check the voltage RESET XS02 #34 16MHz #38 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 ICS01 TIMER/ SYSCON #35 XS01 32KHz #36 Check the crystal #20#18 #15 #16 #70 #6 Check CTL signal REC H Check the waveform (1Vp-p) VH SW Pulse C-ROT pulse #11 #13 #14 #15 #16 Y Vcc #21 CCD Vcc #
TROUBLESHOOTING GUIDE Appendix k Check the crystal #39 Check the voltage XS02 #34 RESET 16MHz #38 #37 Vcc(5V) Vcc(5V) #98 Vcc(5V) #99 ICS01 TIMER/ SYSCON Check the crystal #35 XS01 32KHz #36 #71 #72 #20 #18 #15 #16 #70 #56 Check CTL signal Check MCL/MDA signal REC H MDATA VH SW Pulse MCLK C-ROT Pulse HA SW Pulse Check the waveform PB L #12 #11 #11 #13 #14 #15 #16 Y Vcc #21 CCD Vcc #54 C Vcc HA Vcc Check the voltage (5V) ICY01 VCR Y/C #56/5 7 LA71076AM Caption CVS #35 CVS #
TROUBLESHOOTING GUIDE Appendix 3-4) NO COLOR PLAYBACK Check the voltage Check the crystal #39 XS02 RESET #34 16MHz #38 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 Check the crystal ICS01 TIMER/ SYSCON #35 XS01 32KHz #36 #71 #72 #20 #18 #15 #16 #70 #56 Check MCL/MDA signal REC H MDATA VH SW Pulse MCLK C-ROT Pulse Check CTL signal VH SW Pulse PB L Check the waveform #12 #11 #11 #13 #14 #15 #16 Y Vcc #21 CCD Vcc #54 C Vcc HA Vcc #56/57 ICY01 VCR Y/C LA71076AM Caption CVS #35 CVS #87
TROUBLESHOOTING GUIDE Appendix 3-5) NO SOUND PLAYBACK Check the waveform (30Hz) CTL(+) CTL HEAD m CTL(-) Check the crystal #94 #95 #39 Check the voltage RESET #34 XS02 16MHz #38 Vcc(5V) ICS01 TIMER/ SYSCON #37 Vcc(5V) #98 Vcc(5V) #99 #35 XS01 #36 32KHz Check the crystal #65 #67 #15 #18 #20 Check SCL/SDA signal REC H HA SW Pulse PB L VH SW Pulse Check waveform(30Hz) C-ROT Pulse Y Vcc #21 CCD Vcc #54 #16 #17 #97 #99 #19 2HEAD DRUM C Vcc ICY01 VCR Y/C LA71076AM #56/57 #85 #8
TROUBLESHOOTING GUIDE Appendix 3-6) NO RECORD PICTURE NG : GO to the figure 2-1 (TV PART) Check the waveform of ICY01 #40 OK : GO to the figure m Check the waveform (30Hz) CTL(+) CTL HEAD m CTL(-) Check the crystal #94 #95 #39 XS02 Check the voltage RESET #34 #38 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 ICS01 TIMER/ SYSCON 16MHz #35 XS01 #36 32KHz Check the crystal #65 #67 #15 #18 #20 Check SCL/SDA signal REC H HA SW Pulse PB L Check waveform(30Hz) VH SW Pulse C-ROT Pulse #16 #17 #97
TROUBLESHOOTING GUIDE Appendix 3-7) NO RECORD SOUND NG : GO to the figure 2-2 (TV PART) Check the waveform of ICY01 #74 OK : GO to the figure n n Check the crystal #39 Check the voltage XS02 #34 RESET 16MHz #38 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 Check the crystal ICS01 TIMER/ SYSCON #35 XS01 32KHz #36 #20 #70 #26 Check SCL/SDA signal REC H Check the voltage PB L A.
TROUBLESHOOTING GUIDE Appendix 3-8) NO EXTERNAL VIDEO / AUDIO Check the crystal #39 Check the voltage XS02 #34 RESET 16MHz #38 Vcc(5V) #37 Vcc(5V) #98 Vcc(5V) #99 Check the crystal ICS01 TIMER/ SYSCON #35 XS01 32KHz #36 #75 #71 #72 Check MCL/MDA signal INPUT SELCT MDATA Check CTL signal MCLK TV:H, EXT:L #55 HA Vcc #87 #12 #11 ICY01 VCR Y/C LA71076AM #42 #76 Check the voltage (5V) #35 #96 CVS OUT #42 AUDIO OUT I501 CHROMA DCT814B #2 Check the voltage (5V) Check the wav
DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “DAEWOOELEC” E-mail : leesk@web.dwe.co.
