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Daewoo DVT-14/20H1(T)D, Service Manual

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3

CIRCUIT DESCRIPTION

REC Luminance process

Fig. 2 REC Luminance Process

Appendix

38

34

ICY01

AGC

AMP

1/2

LPF

YNR

COMB

FILTER

CCD

1H

DELAY

46

45

43

41

CLAMP

DETAIL

EN HANCER

NL EMPH

MAIN EMPH

W/D CLIP

FM MOD

REC EQ

+

AGC

AMP

SP/LP

84

H

E

A

D

CHROMA

VIDEO
in

20

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Summary of Contents for DVT-14/20H1(T)D

Page 1: ...70 PROGRAM AUX TERMINAL SCART JACK REAR REMOTE CONTROLLER R 46C with 2 AAA type batteries OTHER FEATURE ON SCREEN DISPLAY SLEEP TIMER WAKE UP TIMER FULL AUTO SEARCH MANUAL FINE TUNING CHILD LOCK AUTO...

Page 2: ...NT INSTRUCTIONS 5 SERVICE REMOCON DIAGRAM 8 SCHEMATIC DIAGRAM 11 EXPLODED VIEW 13 PRINTED CIRCUIT BOARD 15 SERVICE PARTS LIST 16 Different parts list for size 27 The different parts list for system 29...

Page 3: ...liar with the precautions necesary whenworkingonhighvoltageequipment 2 Always discharge the picture tube before handling the tube The picture tube is highly evacuated and if briken glass fragments wil...

Page 4: ...EARCH MANUAL FINE TUNING CHILD LOCK AUTO REPEAT PICTURE TYPE SELECTION NORMAL 1 2 FAVOURITE INDEX SEARCH TV AV VIDEO SECTION SINGLE SYSTEM PAL SECAM colour and CCIR mono chrome signals 625lines 50fiel...

Page 5: ...4 CIRCUIT BLOCK DIAGRAM...

Page 6: ...he R G B UP DOWN KEY of the other color which did not appear on the screen to obtain WHITE 4 FOCUS 1 Apply a RETMA PATTERN SIGNAL 2 Adjust the FOCUS VOLUME on FBT to obtain optimal resolution 5 GEOMET...

Page 7: ...CH1 Measuring Equipment oscilloscope path jig Mode PLAYBACK ATK OFF Test tape DP 2 6KHz Adjustment Procedure 1 Connect the PATH JIG to PY03 after Test tape PLAYBACK 2 Insert the DP 2 TAPE Auto playba...

Page 8: ...g Equipment oscilloscope or audio level meter Mode PLAYBACK Test tape DP 2 6KHz Adjustment Procedure 1 Connect the measuring equipment to the AUDIO OUTPUT P601 terminal 2 After test tape playback adju...

Page 9: ...ANGUAGE V SLOPE V CENT V SIZE H CENT S CORR B G R ATK OFF OSD SUB AGC OSD SHIPPING AGC REC AGC SCREEN R 46C04 To enter the SERVICE MODE Press NORMAL AV SLEEP CLEAR POWER buttons in regular sequency wi...

Page 10: ...reen of RETMA pattern 4 V SIZE VERTICAL SIZE Press this button to adjust the upperside of the pattern coincident with the mechanical center marks the CRT on screen of RETMA pattern 5 H CENT HORIZONTAL...

Page 11: ...PLAYBACK Press this button to enter the PLAYBACK mode 17 FF CUE Press this button to enter the FF CUE mode 18 LANGUAGE Press this button to enter the LANGUAGE SELECTION mode You can select the langua...

Page 12: ...11 SCHEMATIC DIAGRAM...

Page 13: ...12 SCHEMATIC DIAGRAM...

Page 14: ...13 EXPLODED VIEW 1 DVT 14H1F...

Page 15: ...14 EXPLODED VIEW 2 DVT 20H1F...

Page 16: ...15 PRINTED CIRCUIT BOARD...

Page 17: ...POWER A ABS BK M482A 4856715600 SPRING SWPA PIE 0 4 M561 4855613600 MARK BRAND COPPER T0 4 ZZ200 PTFMSJA643 MASK FRONT AS DVT 14H1F 2 M201 4852070021 MASK FRONT HIPS BK M331 4853311601 RETAINER BACK...

Page 18: ...CRYSTAL QUARTZ HC 49 U 6 0000 MHZ 20PPM XN01 5XJ16R000E CRYSTAL QUARTZ HC 49S 16 000000MHZ 30PPM XN02 5XYR03276C CRYSTAL QUARTZ C 001R 32 768000KHZ 20PPM Z503 5PYXT5R5MB FILTER CERA XT 5 5MB ZZ200 PT...

Page 19: ...IP 1 10 15K OHM J 2012 LOC PART CODE PART NAME DESCRIPTION REMARK RCA04 HRFT154JCA R CHIP 1 10 150K OHM J 2012 RCA05 HRFT153JCA R CHIP 1 10 15K OHM J 2012 RCN22 HRFT105JCA R CHIP 1 10 1M OHM J 2012 RC...

Page 20: ...XB1H152K C CERA 50V B 1500PF K TAPPING LOC PART CODE PART NAME DESCRIPTION REMARK C811 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP C838 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C842 CEXF1C101V C ELECTRO...

Page 21: ...DE PART NAME DESCRIPTION REMARK Q835 TKTA1266Y TR KTA1266Y TP Q836 TKTC3198Y TR KTC3198Y Q837 TKTC3198Y TR KTC3198Y QQ01 TKSR1001 TR KSR1001 QQ02 TKSR1001 TR KSR1001 QU02 TKSR1001 TR KSR1001 QU03 TKTA...

Page 22: ...F1H103Z C CERA 50V F 0 01MF Z CU20 CCZF1H103Z C CERA 50V F 0 01MF Z CU22 CBZF1H104Z C CERA SEMI 50V F 0 1MF Z CU25 CBZF1H104Z C CERA SEMI 50V F 0 1MF Z LOC PART CODE PART NAME DESCRIPTION REMARK CY04...

Page 23: ...PZ100K04 COIL PEAKING 10UH 10 5MM K LAL04TB LU02 5CPZ680K02 COIL PEAKING 68UH K AXIAL 3 5MM LU03 5CPZ101K04 COIL PEAKING 100UH K AXIAL 10 5MM LY01 5CPZ560K02 COIL PEAKING 56UH K AXIAL 3 5MM LY02 5CPZ1...

Page 24: ...K I R812 RD AZ472J R CARBON FILM 1 6 4 7K OHM J LOC PART CODE PART NAME DESCRIPTION REMARK R821 RD 4Z561J R CARBON FILM 1 4 560 OHM J R822 RD 4Z153J R CARBON FILM 1 4 15K OHM J R823 RD AZ432J R CARBO...

Page 25: ...0 OHM J RQ13 RD AZ202J R CARBON FILM 1 6 2K OHM J LOC PART CODE PART NAME DESCRIPTION REMARK RQ16 RD AZ271J R CARBON FILM 1 6 270 OHM J RQ18 RD AZ431J R CARBON FILM 1 6 430 OHM J RQ19 RD AZ821J R CARB...

Page 26: ...VT 14H1F E003 4856310300 EYE LET BSR T0 2 R1 6 E004 4856310300 EYE LET BSR T0 2 R1 6 LOC PART CODE PART NAME DESCRIPTION REMARK E005 4856310300 EYE LET BSR T0 2 R1 6 E006 4856310300 EYE LET BSR T0 2 R...

Page 27: ...64J R CARBON FILM 1 6 560K OHM J R319 RD 2Z159J R CARBON FILM 1 2 1 5 OHM J LOC PART CODE PART NAME DESCRIPTION REMARK R320 RD 4Z473J R CARBON FILM 1 4 47K OHM J R405 RD 4Z152J R CARBON FILM 1 4 1 5K...

Page 28: ...T2 WAS 3X12 MFZN BK M481 BUTTON POWER 4854854601 ABS BK 4854854701 ABS BK M482 BUTTON POWER A 4854858401 ABS BK 4854858601 ABS BK M561 MARK BRAND 4855613600 COPPER T0 4 48556159SS SILVER ETCHING DIA C...

Page 29: ...3 DVT 14H1F PTFMSJD353 DVT 20H1F ZZ200 PCB MAIN RHU AS PTMPJ0A643 DVT 14H1F PTMPJ0D353 DVT 20H1F ZZ200 PCB CHIP MOUNT B AS PTMPJ2A643 DVT 14H1F PTMPJ2D353 DVT 20H1F ZZ200 PCB MAIN AXIAL AS PTMPJAA643...

Page 30: ...4H1F WITHOUT TELETEXT DVT 14H1TF WITH TELETEXT PART CODE PART TYPE PART CODE PART TYPE C550 C CERA X X CCZF1H103Z 50V F 0 01MF Z CC717 C CHIP CERA X X HCBH224KCA 25V X7R 0 22MF K I701 IC MICOM 1SDA555...

Page 31: ...circuit A EE mode 1 0Vp p video signal out of SCART JACK or CHROMA IC is input to pin 38 34 of ICY01 One of them is selected and input to AGC AMP sync and peak AGC Output from AGC AMP is input to QV...

Page 32: ...he adjusted signal again White Dark clip is conducted in order to prevent the luminance signal from undershooting and overshooting which are occurred during the above emphasize process The luminance s...

Page 33: ...nance process Fig 2 REC Luminance Process Appendix 38 34 ICY01 AGC AMP 1 2 LPF YNR COMB FILTER CCD 1H DELAY 46 45 43 41 CLAMP DETAIL EN HANCER NL EMPH MAIN EMPH W D CLIP FM MOD REC EQ AGC AMP SP LP 84...

Page 34: ...REC color process CIRCUIT DESCRIPTION Appendix Video in 38 34 AGC AMP BPF YNR COMB FILTER 41 43 CCD COMB FILTER 45 CCD LPF ACC AMP BURST EMPHASIS MAIN CONVERT COLOR LPF COLOR KILLER AGC AMP SP LP 84 H...

Page 35: ...e emphasized the high frequency level emphasized by Non linear emphasis Double noise canceller reduces minute noise of video signal After being passed it is mixed with color signal The mixed signal is...

Page 36: ...g 4 PB Luminance Process CIRCUIT DESCRIPTION Appendix HEAD 82 85 PB FM AGC PB FM EQ PHASE COMP DOUBLE LIMITER FM DEMOD SUB LPF MAIN DEEMPHASIS 18 45 Y LPF YNR CCD COMB 17 21 46 20 43 41 CLAMP Y C MIX...

Page 37: ...DESCRIPTION PB color process Fig 5 PB Color Process Appendix HEAD 82 85 C LPF AGC AMP MAIN CONVERT BPF 1 2 59 57 5 54 C COMB 51 61 COMB AMP CCD LPF NAP BPF 72 71 Y C MIX QV INSERT VIDEO AMP 2 QCY05 I...

Page 38: ...Bm by values B Function Pin No Name Function 1 EQ OUT Playback Amp output 2 EQ SW2 Capacitor switch for head resonance in SP or LP SW ON 3 EQ NFB Negative feedback of PB Amp 4 EQ IN Input impedance 12...

Page 39: ...B mode The signal from audio head input to pin 4 through frequency equalizer circuit composed of RR18 and CU15 This input signal is output to pin through EQ Amp It is input to pin 100 through buffer R...

Page 40: ...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 djkoo web dwe co kr TEL 82 2 360 7806 FAX 82 2 360 7877...

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