Durabrand DCF2003 Service Manual

20” COLOR TELEVISIONDCF200327” COLOR TELEVISIONDCF2703SERVICE MANUAL

3-2 L6115STAWith Soldering Iron:(1) Using desoldering braid, remove the solder fromall pins of the flat pack-IC. When you use solderflux which is appl

3-3 L6115STA2. Installation(1) Using desoldering braid, remove the solder fromthe foil of each pin of the flat pack-IC on the CBAso you can install a

4-1 L6525DCCABINET DISASSEMBLY INSTRUCTIONS[ DCF2003 ]1. Disassembly FlowchartThis flowchart indicates the disassembly steps for thecabinet parts, and

4-2 L6525DCS-VIDEOVIDEO 1 INVIDEOLRANT.INS-1S-1S-1S-2S-1S-4Fig. 1[1] Rear CabinetS-1S-1S-1S-1S-1S-1S-4S-2Fig. 2[3] Main CBAFig. 3S-3S-3S-3S-3ANODE CAP

4-3 L6525DCTV Cable Wiring DiagramCN691ANODECN801CLN801SP801 L691 DEGAUSSING COILMAIN CBAFLYBACK TRANSFORMERT571AC601AC CORDTU1TUNERWH501BWH301BFOCUSS

4-4 L6625DC[ DCF2703 ]1. Disassembly FlowchartThis flowchart indicates the disassembly steps for thecabinet parts, and the CBA in order to gain access

4-5 L6625DCS-1S-1Fig. 6[1] Rear CabinetS-2S-3S-1S-1S-1S-3S-1S-2[1] Rear CabinetS-1Front CabinetControl PlateFig. 7[3] Main CBAFig. 8Front CabinetContr

4-6 L6625DCTV Cable Wiring DiagramCN691ANODECN801CLN801SP801 L691 DEGAUSSING COILMAIN CBAFLYBACK TRANSFORMERT571AC601AC CORDTU1TUNERWH501BWH301BFOCUSS

5-1 L6525EAELECTRICAL ADJUSTMENT INSTRUCTIONS[ DCF2003 ]General Note: "CBA" is abbreviation for "Circuit Board Assem-bly."NOTE:Ele

5-2 L6525EA2. Initial SettingGeneral 1. Enter the Service mode. (See page 5-1) 2. Press "VOL p" button on the service remote controlunit. Di

IMPORTANT SAFETY NOTICEProper service and repair is important to the safe, reliable operation of allFunai Equipment. The service procedures recommende

5-3 L6525EA4. Black Stretch Control AdjustmentPurpose: To show the fine black color.Symptom of Misadjustment: Black color will notappear correctly.Not

5-4 L6525EA7. H. Position AdjustmentPurpose: To obtain correct horizontal position ofscreen image.Symptom of Misadjustment: If H. Position is incor-re

5-5 L6525EA11. Cut-off AdjustmentPurpose: To adjust the beam current of R, G, B, andscreen voltage.Symptom of Misadjustment: White color may bereddish

5-6 L6525EA13. Sub-Brightness AdjustmentPurpose: To get proper brightness.Symptom of Misadjustment: If Sub-Brightness isincorrect, proper brightness c

5-7 L6525EA16. Convergence AdjustmentPurpose: To obtain proper convergence of red, greenand blue beams.Symptom of Misadjustment: If Convergence Adjust

5-8 L6625EA[ DCF2703 ]General Note: "CBA" is abbreviation for "Circuit Board Assem-bly."NOTE:Electrical adjustments are required a

5-9 L6625EA2. Initial SettingGeneral 1. Enter the Service mode. (See page 5-8) 2. Press "VOL p" button on the service remote controlunit. Di

5-10 L6625EAS-TNT1. Press "MENU" button on the service remote con-trol unit. Then select "S-TINT" (S-TNT) display.2. Press "C

5-11 L6625EA7. H. Position AdjustmentPurpose: To obtain correct horizontal position ofscreen image.Symptom of Misadjustment: If H. Position is incor-r

5-12 L6625EA9. V. Position AdjustmentPurpose: To obtain correct vertical width of screenimage.Symptom of misadjustment: If V. Position is incor-rect,

1-1 L6525SPSPECIFICATIONS<TUNER> ANT. Input ------------------- 75ohm Unbal., F typeReference Level------------20Vp-p (CRT Green Cathode)Test In

5-13 L6625EA13. H. Size AdjustmentPurpose: To obtain correct horizontal size of screenimage.Symptom of Misadjustment: If H. Size is incorrect,horizont

5-14 L6625EA16. White Balance AdjustmentPurpose: To mix red, green and blue beams correctlyfor pure white. Symptom of Misadjustment: White becomes blu

5-15 L6625EAThe following adjustments normally are notattempted in the field. Only when replacing theCRT then adjust as a preparation.19. Purity Adjus

5-16 L6625EA22. Yh, Yv, Xv Adjustment1. Adjust the volume of Deflection Yoke(Yh, Yv, Xv)to get good convergence.XvYHYvFRONTYHYvXv

L6525BLSBLOCK DIAGRAMS6-1 6-258737563628056SCLAFTAGCAFTAGCINPUT0INPUT1PROTECT-2PROTECT-1PROTECT-3P-ON-HSDASystem Control Block DiagramREMOTESENSORKEYS

L6525BLIF6-3 6-45816563230SCLCF31CF32VCO F/BQ33AGCSDAS-SW(REAR)FROM/TOCRT/H.V. BLOCKWH301ATOCRT/H.V. BLOCKWH301BBLUE5GREEN4RED3IF/Video Block DiagramI

Audio Block DiagramMAIN CBAAUDIO SIGNAL6-5 6-6 L6525BLAA-MUTE-HVOLUMEFROM/TOSYSTEM CONTROL BLOCKINPUT 0INPUT 1SCLSDASP802SPEAKERR-CHCN802SP-R 1SP-GND

L6525BLCRTCRT/H.V. Block DiagramMAIN CBACRT CBA748611109RAMP-OUTP-ON-HV-RAMP-F/BH-DRIVEGREEN AMPBLUE AMPQ572 Q571Q531Q561Q551,Q552VR562VR561PCC WIDTHT

L6525BLP6-9 6-10Power Supply Block Diagram4A/125VF6014A/125VLINEFILTERL601AC601AC CORDDEGAUSSINGCOILL691CN691PS691BRIDGERECTIFIERD605 - D608HOT COLDT

7-1 L13SCSCHEMATIC DIAGRAMS / CBA'S AND TEST POINTSStandard NotesMany electrical and mechanical parts in this chassis have special characteristic

1-2 L6525SP<AUDIO> All items are measured across 8Ω load at speaker output terminal.Note:Nominal specifications represent the design specificati

7-2 L13SCLIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ONTHE FOLLOWING PAGES:1. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK O

A1A2A3A4B1B2B3B4C1C2C3C4D1D2D3D4E1E2E3E4F1F2F3F4VIDEO SIGNALMain 1/4 Schematic Diagram7-3 7-4L6525SCM1MAIN 1/4Ref No. PositionIC151A-3IC333C-2Q111 D-1

G1G2G3G4H1H2H3H4I1I2I3I4J1J2J3J4K1K2K3K4L1L2L3L4VIDEO SIGNALAUDIO SIGNAL7-57-6L6525SCM2Main 2/4 Schematic DiagramMAIN 2/4Ref No. PositionIC431G-3IC771

M1M2M3M4N1N2N3N4O1O2O3O4P1P2P3P4Q1Q2Q3Q4R1R2R3R4IF SIGNALVIDEO SIGNALAUDIO SIGNALNOTE :The voltage for parts in hot circuit is measuredusing hot GND a

S1S2S3T1T2T3U1U2U3V1V2V3W1W2W3X1X2X3VIDEO SIGNAL7-97-10L6525SCM4 Main 4/4 & CRT Schematic DiagramMAIN 4/4Ref No. Position Ref No. Position Ref No.

FOCUS-VR(UPPER SIDE)SCREEN-VR(LOWER SIDE)VR661+B ADJ+BTP60115kHzTP302VR561PCCVR562WIDTHAGCTP301TP300GNDMain CBA Top ViewBECAUSE A HOT CHASSIS GROUND I

Q571BaseWF8PIN 4OF CN571WF12WF9PIN 1OF CN571PIN 3OF WH501AWF10PIN 7OF IC551WF11Q572CollectorWF7WF1PIN 3OF IC33PIN 8OF TU1WF16WF2PIN 14OF IC333P

WF15Q1511CollectorQ1511BaseWF3 WF14Q1521CollectorQ1521BaseWF4 WF13Q1531CollectorQ1531BaseWF5GNDTP500BLUETP5017-15 BL6650F01011-27-16CRT CBA Top View C

10 V 5 ms1DIV: 0.5V 20µsecIC 33 Pin 3WF1GND1DIV: 0.5V 20µsecIC 333 Pin 14WF21DIV: 0.2V 20msecIC 801 Pin 5WF61DIV: 200V 20µsecCN 571 Pin 1WF9GN

WIRING DIAGRAMCRT CBAFOCUSSCREENGNDD.Y.DY551HDVDMAIN CBABL6650F01011-1WH301ACN150112CN691CLN501CLN301AC6011234512345CN57154321WH301BGNDREDGREENBLUEV50

2-1 L6115IMPIMPORTANT SAFETY PRECAUTIONSPrior to shipment from the factory, our products are strictly inspected for recognized product safety and elec

10-1 L6650PINIC PIN FUNCTIONSIC333 (TV Micro Computer)Pin No.Signal Name Function1GND GND2 N.U. Not Used3 N.U. Not Used4 N.U. Not Used5GND GND6VCC AL+

10-2 L6650PIN70 RCV-IN Input For Remote Control71 N.U. Not Used72 I2C OPENWhite Balance Adjustment Judgement73 AFT AFT Voltage Input74 DG-ON-H Degauss

L-13B-4B-13A-3A-7B-5B-5B-5B-1B-5B-2B-2B-2B-2A-1A-2B-11B-11A-4L-10L-8L-8L-8L-8L-8L-9L-8L-13B-4B-12B-13Details for DY551 and surrounding partsSHINWHA TA

Cabinet [ DCF2703 ]11-3 11-4 L6625CEXPB6PB6B-8B-7B-6L-1L-1B-9L-1L-1L-1MAIN CBAAC601SP801L-13L-13L-13L-13SP801CLN551A-3A-5B-20B-20B-20B-1B-20B-2B-2B-2B

Packing [ DCF2003 ]11-5 L6525PEXPACKING TAPEPACKING TAPETAPEX-2X-1X-3FRONTSome Ref. Numbers are not in sequence.S5S6S4S3S3S2S2X5S1Bend up of the

Packing [ DCF2703 ]11-6 L6625PEXFRONTPACKING TAPEX-4PACKING TAPES-5S-4S-6S-3S-2X-3X-2X-1TAPEX-5S-1

20030417 12-1 L6525CAMECHANICAL PARTS LISTPRODUCT SAFETY NOTE: Products marked with a #have special characteristics important to safety. Beforereplaci

20030417 12-2 L6525CATable 1 (V501 and DY551 Combination)Note 1: Purity and Convergence Adjustments must beperformed following CRT replacement. Refer

20030417 13-1 L6525ELELECTRICAL PARTS LISTPRODUCT SAFETY NOTE: Products marked with a# have special characteristics important to safety.Before replaci

20030417 13-2 L6525ELC305 ELECTROLYTIC CAP. 0.1µF/50V M or CE1JMASTLR10ELECTROLYTIC CAP. 0.1µF/50V M CE1JMASDLR10C306 ELECTROLYTIC CAP. 100µF/10V M or

2-2 L6115IMPing is performed that involves B+, horizontal de-flection or high voltage. Correct operation of the X-radiation protection circuits also m

20030417 13-3 L6525ELC555 B METALIZED PLYESTER CAP. 2.2µF/100V JCT2A225MS065C556 B FILM CAP.(P) 0.1µF/50V J or CMA1JJS00104B FILM CAP.(P) 0.1µF/50V J

20030417 13-4 L6525ELCERAMIC CAP. RB 560pF/2KV CA3D561TE006C654 ELECTROLYTIC CAP. 1µF/50V M or CE1JMASTL1R0ELECTROLYTIC CAP. 1µF/50V M or CE1JMASTL010

20030417 13-5 L6525EL# CONNECTOR BASE, 5P W-P3005-02 1730812CN691# CONNECTOR BASE, 2P TV-50P-02-V3 or J3TVC02TG002# CONNECTOR BASE, 2P RTB-1.5-2P J3RT

20030417 13-6 L6525ELSWITCHING DIODE 1N4148 or NDTZ001N4148DIODE 1SS176TPA7 1SS176TD661 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133SWITCHING DIODE 1N

20030417 13-7 L6525ELTRANSISTOR KTC3199(GR) or NQS10KTC3199TRANSISTOR KTC3198(GR) or NQS40KTC3198TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZTRANSISTOR 2SC

20030417 13-8 L6525ELQ751 B TRANSISTOR 2SC2785(F) or QQSF02SC2785B TRANSISTOR 2SC2785(H) or QQSH02SC2785B TRANSISTOR 2SC2785(J) or QQSJ02SC2785B TRANS

20030417 13-9 L6525ELR150 CARBON RES. 1/4W J 2.2k Ω RCX4JATZ0222R153 CARBON RES. 1/4W J 100 Ω RCX4JATZ0101R154 CARBON RES. 1/4W J 100 Ω RCX4JATZ0101R1

20030417 13-10 L6525ELR583# A METAL OXIDE FILM RES. 2W J 2.2 Ω or RN022R2ZU001# A METAL OXIDE FILM RES. 2W J 2.2 Ω RN022R2DP004R583# B METAL OXIDE FIL

20030417 13-11 L6525ELR751 CARBON RES. 1/4W J 22k Ω RCX4JATZ0223R752 CARBON RES. 1/4W J 27k Ω RCX4JATZ0273R753 B CARBON RES. 1/4W J 56k Ω RCX4JATZ0563

20030417 13-12 L6525ELCRT CBAGP641# GAP. FNR-G3.10D FAZ000LD6005J160 CARBON RES. 1/4W J 3.3k Ω RCX4JATZ0332JK701 A RCA JACK(YELLOW) MSP-281V4-B JXRL01

2-3 L6115IMPPrecautions during Servicing A. Parts identified by the ( # ) symbol are critical forsafety.Replace only with part number specified. B. In

20030417 13-13 L6525ELTRANSISTOR 2SC2785(H) or QQSH02SC2785TRANSISTOR 2SC2785(J) or QQSJ02SC2785TRANSISTOR KTC3199(GR) or NQS10KTC3199TRANSISTOR KTC31

DCF2003/DCF2703 L6525/625CR

2-4 L6115IMPSafety Check after ServicingExamine the area surrounding the repaired locationfor damage or deterioration. Observe that screws,parts and w

3-1 L6115STASTANDARD NOTES FOR SERVICINGCircuit Board Indications a. The output pin of the 3 pin Regulator ICs is indicat-ed as shown. b. For other IC