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Daewoo DTM-2881Z SERIES, Service Manual

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Daewoo DTM-2881Z SERIES Service Manual Download Page 12

1

1

    SVM (Scan Velocity Modulation)

    1. SVM SVG

:  SVM Gain

    2. SVM SVD

:  SVM Differentiator delay (0 = filter off)

    3. SVM SVDEL :  Delay of SVMOUT in steps of 12.5nS
    2. SVM SVCOR :  SVM coring value

ALIGNMENT INSTRUCTIONS

    BCL (Beam Current Limit)

    1. BCL Thres :  BCL threshold current
    2. BCL TC

:  BCL time constant

    3. BCL Gain

:  BCL loop Gain

Summary of Contents for DTM-2881Z SERIES

Page 1: ...ish Hungarian Rumanian Turkish Remote Controller Teletext 21 pin EURO SCART jack AV input TV output RGB input 21 pin EURO SCART jack AV input S VHS input RCA type AV input jack S VHS jack Headphone jack R 22D06 with 2 AAA type batteries 75 ohm unbalanced input Din Standard Frequency Synthesize FS Tuning System UV1316 A Philips DT5 BF18D Partsnics TECC2949PG35W S S EL2782 105 B Siel 100programs Sta...

Page 2: ...CATIONS 3 CIRCUIT BLOCK DIAGRAM 4 ALIGNMENT INSTRUCTION 5 SCHEMATIC DIAGRAM 12 EXPLODED VIEW 14 PRINTED CIRCUIT BOARD 18 SERVICE PARTS LIST 21 APPENDIX Appendix is provided only by internet http svc dwe co kr IC DESCRIPTION 1 IC DC VOLTAGE CHARTS 18 ...

Page 3: ...the high potential of the picture tube before handling the tube The picture tube is highly evacuated and if broken glass fragments will be violently expelled 2 If any Fuse in this TV receiver is blown replace it with the FUSE specified in the Replacement Parts List 3 When replacing a high wattage resistor oxide metal film resistor in circuit board keep the resistor 10mm away from circuit board 4 K...

Page 4: ... 5Vrms Imp 10 k RF 60 MOD 7 Blue in 0 7Vpp 2dB Imp 75 8 Slow Function Switching TV 0 2V PERI 9 5 12V Imp 10 k 9 Green Earth 10 NC 11 Green In 0 7Vpp 2dB Imp 75 12 NC 13 Red Earth 14 Rapid Blanking Switching Earth 15 Red In C In 0 7Vpp 2dB Imp 75 16 Rapid Blanking switching Logic 0 0 0 4V Logic 1 1 3V Imp 75 17 Video Earth 18 Rapid Blanking Earth 19 Video Out 1Vpp 2dB Imp 75 20 Video In Y In 1Vpp 2...

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

Page 6: ...ME UP VOLUME UP CURSOR RIGHT PR DOWN PAGE DOWN NORMAL Not used A V Not used TXT Not used Not used INDEX Not used C Zoom Double Window SOUND Not used MODE MUTE MUTE CURSOR DOWN Not used Size Not used Y EFFECT Not used R 22D06 SLEEP Not used Not used CANCEL Not used HOLD RECALL SUBPAGE STILL REVEAL Not used R Not used G PR PAGE NUMBER NUMBER 0 9 0 9 ...

Page 7: ...SVC Menu by OSD in TV set ALIGNMENT INSTRUCTIONS Tuner is Flat Option Svm SVG Svm SVD Svm SVDEL Svm SVCOR Bcl Thres Bcl Tc Bcl Gain Nor1 Bright Nor1 Cont Nor1 Color Nor1 Sharp Nor1 Tint Nor2 Bright Nor2 Cont Nor2 Color Nor2 Sharp Nor2 Tint Dolby3411 Phi NO 020 001 013 012 430 250 511 038 058 038 032 032 038 038 038 032 032 NO Osd Contrast Osd Bright Text Gain Tilt Option Transparent Vertical angle...

Page 8: ...15 Double TEXT 000 000 000 000 Wide Option YES YES NO NO 2PAGE Tuner Is DWE DWE DWE DWE Flat Option YES YES YES YES Svm SVG 010 010 010 010 Svm SVD 002 002 002 002 Svm SVDEL 010 007 010 007 Svm SVCOR 008 007 008 007 Bcl Thres 530 550 530 550 Bcl Tc 250 250 250 250 Bcl Gain 511 511 511 511 Nor1 Bright 038 045 038 038 Nor1 Cont 058 058 058 058 Nor1 Color 040 040 040 040 Nor1 Sharp 032 032 032 032 No...

Page 9: ...o 3 0V 0 1V SCREEN G2 1 Set a Pattern Generator with RF Frequency 210 25MHz 10CH Pattern RETMA 2 Select the G2 in Menu 3 And a Horizontal Line will appear on the screen 4 Adjust the SCREEN VOLUME on FBT barely to see the Horizontal Line 5 Press the PR UP DOWN keys to finish the SCREEN adjustment FOCUS 1 Apply a RETMA PATTERN signal 2 Adjust the FOCUS VOLUME on FBT to obtain optimal resolution GEOM...

Page 10: ...st picture centering with the select H Center by volume UP DOWN keys EW 1 WIDTH 1 Apply a RETMA PATTERN Signal 2 Adjust the horizontal width to make a perfect circle with the select H Width by volume UP DOWN keys 2 PARA 1 Apply a CROSSHATCH PATTERN Signal 2 Adjust the vertical line to straight with the select E W Para by volume UP DOWN keys 3 CORNER Fixed Adjust if need be 1 Apply a CROSSHATCH PAT...

Page 11: ...ture can be seen DOUBLE TEXT CENTER 1 Pattern Pattern RED 2 Select Menu 3 Select DT in SVC menu time to see the Double Text Picture Left RF Picture Right Text Picture 4 Change the Double Text control keys volume UP DOWN keys so that the left edge of text picture concur with the right edge of RF picture WIDE MODE 1 Locate the cursor on Wide in SVC Menu 2 Yes changes the display to 16 9 mode 3 No ch...

Page 12: ... SVM SVD SVM Differentiator delay 0 filter off 3 SVM SVDEL Delay of SVMOUT in steps of 12 5nS 2 SVM SVCOR SVM coring value ALIGNMENT INSTRUCTIONS BCL Beam Current Limit 1 BCL Thres BCL threshold current 2 BCL TC BCL time constant 3 BCL Gain BCL loop Gain ...

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

Page 14: ...13 ...

Page 15: ...14 EXPLODED VIEW DTM 29U7ZLS DTM 29U7ZZS ...

Page 16: ... CHASSIS CRT 4852163301 7172401212 4856015821 7172401612 COVER BACK SEREW TAPTITE SCREW CRT FIX SCREW TAPTITE SP 78128F02 TT2 WAS 3X10 MFZN HIPS GY 1 8 2 CP 885F 29 F CR T2 0 2 1 1 4 SWRM SK5 L 35 HIPS GY 8 1 4 1 4851950201 BUTTON CTRL AS 1 4955401 5549601 REMARKS REFERENCE MODEL Approved by Desi g ned by Mechani c al Desi g n Team TV Research Cent e r DAEWOO El e ctroni c s CO LTD SCALE m m PART ...

Page 17: ...16 DTM 28W8ZLS DTM 28W8ZZS EXPLODED VIEW ...

Page 18: ...17 EXPLODED VIEW DTM 2881ZLS 2881ZZS ...

Page 19: ...PRINTED CIRCUIT BOARD 18 ...

Page 20: ...PRINTED CIRCUIT BOARD 19 ...

Page 21: ...PRINTED CIRCUIT BOARD 20 ...

Page 22: ...F J C809 CEYD2W221D C ELECTRO 450V FHS 220MF 25X50 C817 CH1BFE472M C CERA AC AC400V 4700PF M U C V C820 CEYF1E332V C ELECTRO 25V RSS 3300MF 16X31 5 C828 CEYE2D221E C ELECTRO 200V RM 220MF 18X35 5 C829 CEYE2D331E C ELECTRO 200V RM 330MF D401 DDTV32D DIODE DTV32D D805 DRL4A015 DIODE RL4A 015 308 D806 DRL4A015 DIODE RL4A 015 308 D820 DFMLG12S DIODE FML G12S D821 DFMLG12S DIODE FML G12S D824 PTP2SW690...

Page 23: ...0 EYE LET BSR T0 2 R2 3 E204 4856310600 EYE LET BSR T0 2 R2 3 E205 4856310600 EYE LET BSR T0 2 R2 3 E206 4856310600 EYE LET BSR T0 2 R2 3 E207 4856310600 EYE LET BSR T0 2 R2 3 E208 4856310600 EYE LET BSR T0 2 R2 3 E209 4856310600 EYE LET BSR T0 2 R2 3 E210 4856310600 EYE LET BSR T0 2 R2 3 E211 4856310600 EYE LET BSR T0 2 R2 3 E212 4856310600 EYE LET BSR T0 2 R2 3 E213 4856310600 EYE LET BSR T0 2 R...

Page 24: ...AL FILM 2W 4 7K OHM J SMALL R835 RN02B472JS R METAL FILM 2W 4 7K OHM J SMALL R851 RN02B109JS R METAL FILM 2W 1 OHM J SMALL SWF01 5S50101090 SW TACT THVH472GCA SWF02 5S50101090 SW TACT THVH472GCA SWF03 5S50101090 SW TACT THVH472GCA SWF04 5S50101090 SW TACT THVH472GCA SWF05 5S50101090 SW TACT THVH472GCA X701 5XEX4R000C CRYSTAL QUARTZ HC 49 U 4 000MHZ 20PPM TP Z102 5PXXT5R5MB FILTER CERA XT 5 5MB TP ...

Page 25: ...2 1 0 65 TIN COATING J407 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J408 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J410 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J411 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J412 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J413 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J414 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J415 858...

Page 26: ...TIN COATING J734 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J735 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J736 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J737 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J738 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J739 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J741 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J801 85801065GY W...

Page 27: ... R CARBON FILM 1 6 1K OHM J R723 RD AZ102J R CARBON FILM 1 6 1K OHM J R724 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R725 RD AZ223J R CARBON FILM 1 6 22K OHM J R726 RD AZ161J R CARBON FILM 1 6 160 OHM J R727 RD AZ151J R CARBON FILM 1 6 150 OHM J R728 RD AZ101J R CARBON FILM 1 6 100 OHM J R729 RD AZ332J R CARBON FILM 1 6 3 3K OHM J R730 RD AZ132J R CARBON FILM 1 6 1 3K OHM J R731 RD AZ182J R CARBON FI...

Page 28: ...ADIAL AS DTM 2881ZLS CD01 CEXF1C101V C ELECTRO 16V RSS 100MF 6 3X11 TP CD02 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD03 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD04 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD05 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD06 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD07 CMXM2A224J C MYLAR 100V 0 22MF J CD08 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP CD09 CXCH...

Page 29: ...SCREW TAPPTITE TT2 WAS 3X10 MFZN Q909 PT62SW6900 HEAT SINK ASS Y TKTC4370AY 7178301011 00001 TKTC4370AY TR KTC4370AY 0000A 4857026900 HEAT SINK AL EX 0000B 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN SCT1 4859302930 SOCKET CRT ISHS 09S SF01 5PK3953M FILTER SAW K3953M SF02 5PK9650M FILTER SAW K9650M ZZ200 PTUNJ0D745 PCB UNION RHU AS DTM 28W8ZLS C907 CEXF2E100V C ELECTRO 250V RSS 10MF 10X20 TP C908 ...

Page 30: ...TIN COATING J656 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J657 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J658 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J659 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J660 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J661 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J662 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J663 85801065GY W...

Page 31: ...CARBON FILM 1 6 39K OHM J R935 RD AZ563J R CARBON FILM 1 6 56K OHM J R936 RD AZ103J R CARBON FILM 1 6 10K OHM J R937 RD AZ820J R CARBON FILM 1 6 82 OHM J R938 RD 2Z100J R CARBON FILM 1 2 10 OHM J R939 RD AZ820J R CARBON FILM 1 6 82 OHM J R940 RD AZ122J R CARBON FILM 1 6 1 2K OHM J R941 RD AZ152J R CARBON FILM 1 6 1 5K OHM J R942 RD AZ683J R CARBON FILM 1 6 68K OHM J R943 RD AZ683J R CARBON FILM 1 ...

Page 32: ... 1 6W 62K OHM F RN AZ7502F RN AZ7502F RN AZ6202F P902 LW 0640 03 HER 03 YBNH250 02 ULW 300 LW 0640 03 HER 03 YBNH250 02 ULW 300 4859205620 4850703N26 4859205620 4850703N26 R954 2W 6 8 OHM J 1W 8 2 OHM J 2W 6 8 OHM J 1W 8 2 OHM J RF02Z689J RF01Z829J RF02Z689J RF01Z829J SP01 12W 8 OHM SP 58126F SP 78128F02 4858311110 4858315210 SP02 12W 8 OHM SP 58126F SP 78128F02 4858311110 4858315210 ZZ131 DC 28SF...

Page 33: ...controller keep running at a frequency programmable via the CCU In this mode the power consumption of the device can be reduced by more than 95 LP WFI Wait For Interrupt Mode The Wait For Inter rupt WFI instruction and if the Watchdog is not enable the CPU and its peripherals stop operation and the I O ports enter high impedance mode A reset is necessary to exit from Halt mode 1 1 3 I O Ports Up t...

Page 34: ...M 56 lead Shrink DIP package 28 fully programmable I O pins Serial Peripheral Interface Flexible Clock controller for OSD Data Slicer and Core clocks running from one single low frequency external crystal Enhanced Display Controller with 26 rows of 40 80 characters Serial and Parallel attributes 10x10 dot Matrix 512 ROM characters definable by user 4 3 and 16 9 supported 2 Feature 0 C O 70 C O _ R...

Page 35: ...3 3 Block Diagram IC DESCRIPTION APPENDIX ...

Page 36: ...r inverter and internal clock generator OSCOUT is the output of the oscillator inverter VSYNC Vertical Sync Vertical video synchronisation input to OSD Positive or negative polarity HYNC CSYNC Horizontal Composite sync Horizontal or composite video synchronisation input to OSD Posi tive or negativety PXFM Analog pin for the Display Pixel Frequency Multi plier AVDD Analog VDD of PLL This pin must b...

Page 37: ...zontal scaling of the 2fH signal Scaling factors 3 0 75 including 16 9 compat ibility 5 zone panorama generator Embedded memory On chip memory controller Embedded DRAM core for field memory SRAM for PAL SECAM delay line Data format 4 2 2 Flexible clock and synchronization concept Horizontal line locked or free running mode Vertical locked or free running mode Scan rate conversion Simple interlaced...

Page 38: ...U656 Encoder 51 8 8 8 8 50 Fine delay Y noise reduction 38 UV noise reduction 37 eDRA M memory controller 39 14 23 17 27 Pixelmixer 44 H postscaler 42 Panorama generator 43 V H avout auout ayout hout vout clkout v50 h50 v cvbso3 cvbso2 cvbso1 cvbs1 cvbs2 cvbs3 cvbs4 cvbs5 cvbs6 cvbs7 rin1 gin1 bin1 rin2 gin2 bin2 fbl2 fbl1 656clk 656io0 656io1 656io2 656io3 656io4 656io5 656io6 656io7 CLAMP CLAMP ...

Page 39: ... output 3 VSSDACY S I DAC Y 4 VSSD2 S Supply voltage for digital 0 V digital 5 VDDD2 S Supply voltage for digital 1 8 V digital 6 SDA I O I2C Bus data 7 TMS I Testmode select Connected to vdd33 8 656VIN BLANK1 I O Connect to vss and dis able blank Separate V input for 656 BLANK output 9 656CLK I O Leave open Digital input output clock 7 ...

Page 40: ... double scan dependent on version 24 RESET I Reset input Reset when low 25 VDDP3 S Supply voltage for digital 0 V pad 26 VSSP3 S Supply voltage for digital 3 3 V pad 27 CLKOUT O Leave open Output clock 27 MHz nom 28 VDDD3 S Supply voltage for DRAM 1 8 V digital 29 VSSD3 S Supply voltage for digital 0 V digital 30 656IO2 I O Leave open Digital input output 31 656IO1 I O Leave open Digital input out...

Page 41: ...0 VDDAC1 S Supply voltage CVBS1 1 8 V 51 VSSAC1 S Supply voltage CVBS1 0 V 52 CVBS1 I Connect to vss CVBS input Analog input 53 CVBS2 I Connect to vss CVBS input Analog input 54 CVBS3 I Connect to vss CVBS input Analog input 55 CVBS4 I Connect to vss CVBS input or Y1 Analog input 56 CVBS5 I Connect to vss CVBS input or C1 Analog input 57 CVBS6 I Connect to vss CVBS input or Y2 Analog input 58 CVBS...

Page 42: ...70 XIN I Crystal connection 1 71 TCLK I Testclock 72 VDDP1 S Supply voltage for digital 3 3 V pad 73 VSSP1 S Supply voltage for digital 0 V pad 74 656HIN CLKF20 I O Connect to vss and dis able clock Separate H input for 656 20 25 clock output 75 VDDDACV S I Leave open DAC V 27 MHz nom 76 AVOUT O I Leave open V output 77 VSSDACV S I Leave open DAC V 78 VDDDACU S I DAC U 79 AUOUT O I U output 80 VSS...

Page 43: ... output digital EHT compensation for vertical east west soft start stop of H drive vertical angle and bow correction differential vertical outputs vertical zoom via deflection horizontal and vertical protection circuit horizontal frequency for VGA SVGA 1080I black switch off procedure supports horizontal and vertical dynamic focus Miscellaneous selectable ITU R 601 4 1 1 4 2 2 YC rCb input or doub...

Page 44: ...4 53 52 51 50 49 48 47 46 45 44 43 42 41 C0 C1 C2 C3 C4 C5 C6 C7 VSUPD GNDD Y0 Y1 Y2 Y3 Y4 Y5 NC EW VERT VERT GNDM SENSE RSW1 RSW2 VPROT SAFETY HFLB ASG1 NC VSYNC HSYNC DFVBL SCL RESQ TEST NC HCS ASG2 BIN2 PB GIN2 Y RIN2 PR SDA FBLIN2 BIN1 GIN1 RIN1 FBLIN1 AGND VRD BCS VSUPO XREF GNDO BOUT GOUT ROUT SVM Y7 LLC1 LLC2 HS VS FREQSEL CM1 CM0 VS2 Y6 XTAL2 XTAL1 NC GNDP VSUPP FIFORRD FIFORD FIFOWR FIFOR...

Page 45: ...FVBL HSYNC VSYNC PWM1 PWM2 PWMV Fig 4 5 Analog fastblank pins FBLIN1 FBLIN2 Fig 4 6 Input pins RIN1 GIN1 BIN1 RIN2 PR GIN2 Y BIN2 PB Fig 4 7 Output pin HOUT Fig 4 8 Input pin SENSE Fig 4 9 Output pin RSW2 Fig 4 10 I O pin RSW1 VREF P N GNDP VSUPP P N VSUPO GNDO VREF N N Clamping VSTBY P N P GNDM N N GNDM N P to ADC P P VSUPO GNDO N Flyback P IC DESCRIPTION APPENDIX ...

Page 46: ... 13 Input pins XREF VDR BCS Fig 4 14 Output pins SVM ROUT GOUT BOUT Fig 4 15 Input pin XTAL1 Output pin XTAL2 Fig 4 16 I O pins SCL SDA VSUPO GNDO P P P N ref current VSUPO GNDO VRD BCS XREF int ref voltage GNDO N GNDD P P N N VSUPD XTAL1 XTAL2 N GNDD VREF ...

Page 47: ...ired Pin 30 34 Fast Blank Input FBLIN1 2 These pins are used to switch the RGB outputs to the external analog RGB inputs FBLIN1 switches the RIN1 GIN1 and BIN1 inputs FBLIN2 switches the RIN2 GIN2 and BIN2 inputs The active level Low or High can be selected by software Pin 31 32 33 Analog RGB Input1 RIN1 GIN1 BIN1 These pin are used to insert an external analog RGB sig nal e g from a SCART connect...

Page 48: ...informatoion Either single or double vertical frequency or VGA vertical sync signal Pin 65 66 Crystal Output Input XTAL2 XTAL1 These pins are connectecd to an 5 MHz crystal oscillator The security unit for the HOUT signal uses this clock sig nal as reference Pin 67 Data Input Output SDA Via this pin the bus data are written to or read from the DDP 3310B Pin 68 Clock Input SCL Via this pin the cloc...

Page 49: ...12 13 14 15 16 17 18 19 20 V DC 2 4 2 4 2 4 0 2 0 2 0 2 0 2 4 9 0 0 2 Pin No 21 22 23 24 25 26 27 28 29 30 V DC 0 0 0 4 9 0 1 0 1 0 0 1 0 1 0 Pin No 31 32 33 34 35 36 37 38 39 40 V DC 0 1 0 3 7 3 7 0 3 7 3 7 6 9 8 0 6 9 Pin No 41 42 43 44 45 46 47 48 49 50 V DC 0 3 7 3 7 3 7 0 3 7 3 7 0 3 7 3 7 Pin No 51 52 53 54 55 56 57 58 59 60 V DC 0 3 7 3 7 2 6 3 7 0 5 0 1 5 1 5 0 3 Pin No 61 62 63 64 V DC 0 ...

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