Durabrand DBTV2500 Service Manual
  1. Manuals
  2. Brands
  3. Durabrand Manuals
  4. TV Receiver
  5. DBTV2500
  6. Service manual
Durabrand DBTV2500 Service Manual

Durabrand DBTV2500 Service Manual

Color television receiver
Hide thumbs Also See for DBTV2500:
Table of Contents

Advertisement

Quick Links

Download this manual
DBTV2500
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION B
Design and specifications are subject to change without notice.

Advertisement

Table of Contents
loading

Related Manuals for Durabrand DBTV2500

Summary of Contents for Durabrand DBTV2500

  • Page 1 DBTV2500 SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR’S VERSION B Design and specifications are subject to change without notice.
  • Page 2 DBTV2500 SERVICE MANUAL COLOR TELEVISION RECEIVER REVISION 1 MFR’S VERSION D MFR’S VERSION IC101 OEC7044A OEC7045A Please file this revision with the original version.
  • Page 3 Change of IC101 DIFFERENCES MFR'S VERSION B MFR'S VERSION D PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. IC101 I56F07044A IC OEC7044A I56F07045A OEC7045A PCB010 A3I058G01A MAIN PCB ASS'Y TMX456A A3I058G01B MAIN PCB ASS'Y TMX456A SPEC.NO. M3I0-62G O/R NO. A073521...

  • Page 4: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts.

  • Page 5: Table Of Contents

    CONTENTS A1-1 SERVICING NOTICES ON CHECKING ...................... A1-1 HOW TO ORDER PARTS ........................... IMPORTANT ..............................A1-1 CONTENTS ..............................A2-1 A3-1~A3-4 GENERAL SPECIFICATIONS ........................B-1, B-2 DISASSEMBLY INSTRUCTIONS ....................... SERVICE MODE LIST ..........................CONFIRMATION OF USING HOURS ......................NOTE FOR THE REPLACING OF MEMORY IC ..................ELECTRICAL ADJUSTMENTS ........................

  • Page 6: General Specifications

    GENERAL SPECIFICATIONS G-1.Outline of the Product inch( 626 mmV):Measured diagonally Color CRT 100 degree deflection G-2.Broadcasting System System G-3.Color System NTSC SECAM or Monochrome signal G-4.NTSC Playback(PAL 60Hz) G-5.NTSC 3.58+4.43/PAL60Hz G-6.Antenna Input Impedance VHF/UHF 75 ohm unbalanced G-7. T uner and Receiving Contactless Electric tuner 1Tuner System 2Tuner System...
  • Page 7 GENERAL SPECIFICATIONS G-17.Protector: Power Fuse G-18.Regulation Safety NEMKO FEMKO DEMKO IEC65 SEMKO HOMOLO SABS SISIR AS3159 DENTORI GOST NONE Radiation SABA HOMOLO CISPR13 DENTORI AS/NZS NONE X-Radiation DHHS DENTORI NONE G-19.Temperature Operation ˚C~ 40 ˚C Storage ˚C~ 60 ˚C G-20.Operating Humidity Less than G-21.Clock and Timer Sleep Timer...
  • Page 8 GENERAL SPECIFICATIONS G-26.OSD Language OSD Language Setting Not Applicable G-27.Speaker P os i t i o n Front Side Bottom Size 1.5 x 2.7 inches Imp. ohm x Power 075 + 0.75 W 0.5 + 0.5 W (Typical) G-28.EXT Speaker G-29.Carton Master Carton: Need...
  • Page 9 GENERAL SPECIFICATIONS G-32.Switch Front Power(Tact) Channel Up/Reset Volume Up/Set Up System Select Channel Down/Enter Volume Down/Set Down Main Power SW Sub Power Menu:Vol UP + Vol Down Rear AC/DC TV/CATV Selector Degauss Main Power SW G-33.Magnetic Field BV : +0.45G BV : +0.35G BV :...

  • Page 10: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 1. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.
  • Page 11 DISASSEMBLY INSTRUCTIONS 4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 1-5. Support Fig. 1-5 Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts. 2.

  • Page 12: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD.

  • Page 13: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: RF AGC DELAY Read and perform these adjustments when repairing the Receive an 80dB monoscope pattern. circuits or replacing electrical parts or PCB assemblies. Connect the digital voltmeter to TP001. Activate the adjustment mode display of Fig.
  • Page 14 ELECTRICAL ADJUSTMENTS Fig. 2-1 00 OSD Fig. 2-3 2-9: OSD HORIZONTAL 110% Activate the adjustment mode display of Fig. 1-1. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 2-3) 100% Fig.
  • Page 15 ELECTRICAL ADJUSTMENTS PURITY AND CONVERGENCE 3-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator. minutes before performing the following adjustments.

  • Page 16: Major Components Location Guide

    MAJOR COMPONENTS LOCATION GUIDE TU001 FB401 TP001 CP601 FOCUS VOLUME SCREEN VOLUME MAIN PCB TP023 TP024 J801 TP022 CRT PCB D3-1...

  • Page 17: Block Diagram

    BLOCK DIAGRAM Q351 MUTE SW. TU001 CHROMA IC CH UP IC601 M61203BFP X602 3.579545MHz IC351 AN7523 VOL UP X' TAL AUDIO OUT MICON IC SOUND IC SP351 CH DOWN RF AGC OUT IC101 OEC7044A CF601 SAW FILTER VIF IN (1) VOL DOWN Q606 AUDIO MUTE...

  • Page 18: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CP802A D405 R422 TP501 CP803A C401 CP601 R509 W010 TU001 TP001 R429_1 IC501 D410 R001 D605 HS501 R002 C404 D422 W818 C004 D408 C412 D404 FB401 D401 W019 L406 R503 D407 D402 R508 Q403 R506...
  • Page 19 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R638 C113 R642 C699 IC101 C634_1 IC601 R603 R111 C642 R611...
  • Page 20 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) TU001 NJH3021U268 ACCESORY ATC001 NXC0032-010010 TP001 TM101 R25-1127 C003 FROM DEFLECTION/CRT P_CON+5V OS101 FROM POWER PIC-28143SY-2 R001 S809X 68K1/2W R002 FROM/TO CHROMA 68K 1/2W I2C_OFF MICON IC IC101 OEC7044A R123 OSD_R P50/H.SYNC RED R 4.7K R122 P51/V.SYNC GREEN G...
  • Page 21 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) TO MICON/TUNER SYNC Y_VIDEO AT+5V 10.6 FROM POWER REG. Q603 15.0 2SD734 P_CON+15V S802Y S802X REG. RESET Q606 2SD734 CF604 EFCT4R5MW5 FROM POWER W828 AT+15V R615 CF603 EFCT4R5YS5A R638 6.8K D607 C661 0.01 Y 1SS133 R646 TO SOUND C638...
  • Page 22 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) CD802 2E054401 FROM/TO CHROMA CLAMP CLAMP CLAMP CLAMP CLAMP G.OUT G.OUT G.OUT G.OUT G.OUT B.OUT B.OUT B.OUT B.OUT B.OUT R.OUT R.OUT R.OUT R.OUT R.OUT V-OUT IC V_OUT CP802A CP802B IC401 LA78041 51048-0510 51048-0510 V_FEEDBACK HS401 L802 THERMAL PUMP...
  • Page 23 POWER SCHEMATIC DIAGRAM (MAIN PCB) CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE 6.3A 125V (F501) FUSE. ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES 6.3A 125V D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V (F501). DEGAUSS COIL L502 R502...
  • Page 24 SOUND SCHEMATIC DIAGRAM FROM MICON/TUNER (MAIN PCB) AUDIO_MUTE FROM CHROMA AUDIO_OUT FROM DEFLECTION/CRT SPEAKER P_CON+5V SP351_2 CP351_1 SA04A05AWA SOUND+B TID-X02P-B2 SOUND IC IC351_1 AN7523 SPEAKER SP351_2 SA04A05AWA W834 W820 S801Y S809Y S801X W829 W813 W810 MUTE SW. R354 Q351 2SC1815Y W814 PCB010 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME...

  • Page 25: Micon/Tuner

    WAVEFORMS MICON/TUNER 11 1V 20 s/div 200mV 5ms/div 0.5V 20 s/div 12 1V 20 s/div 200mV 20 s/div 0.5V 20 s/div 1V 20 s/div 3 200mV 20 s/div 20V 20 s/div DEFLECTION/CRT 200mV 5ms/div 14 0.5V 5ms/div 9 200mV 20 s/div CHROMA 15 20V 20 s/div 0.5V 5ms/div...

  • Page 26: Sound

    WAVEFORMS 16 2V 20 s/div 21 50V 20 s/div 22 50V 20 s/div 200V 20 s/div SOUND 0.5V 1ms/div 10V 5ms/div 1V 1ms/div 10V 5ms/div 50V 20 s/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 27: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L502 FB401 MS501 V801 ATC001 TU001 PCB010 SP351 (MAIN PCB)

  • Page 28: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 8995034000 CORD CLIP UL CO. HEAT SINK HEAT SINK METAL SPACER 741WUA0021 SPRING,EARTH 701APJA036 CABINET,FRONT 713WPA0096 GUIDE,REMOCON 7230006856 SHEET,CAUTION 735WPA0426 BUTTON ASS'Y 702APA0086 CABINET,BACK 722552A004 SHEET,RATING 723000B179 FILM,DECORATION 7232020733 SHEET,BRAND 899HV3T001 HOLDER,ANODE WIRE 762WPA0009 HOLDER,CRT WIRE 8994201000 HOLDER,CRT WIRE 7220001109 SHEET,HWC...

  • Page 29: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES R135 R001T6272J RC 2.7K OHM 1/6W D604 D1VT001330 DIODE, SILICON 1SS133T-77 ! R177 R5W2CF122J R, CEMENT 1.2K OHM 10W D605 D2WT011E10 DIODE, SILICON 11E1-EIC ! R401 R4X5T4104F R, METAL 100K OHM 1/4W...
  • Page 30 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS CP806 069W010010 CONNECTOR PCB SIDE 005P-2100 CP802A 067R005019 WIRE HOLDER 51048-0510 CP802B 067R005019 WIRE HOLDER 51048-0510 CP803A 067R104019 WIRE HOLDER 51052-0400 CP803B 067R104019 WIRE HOLDER 51052-0400 ! DY801 027M062505 DY 7M062505 ! F501 081PA6R302 FUSE...
  • Page 31 M3I0-62G SPEC.NO. A063519 O/R NO.

Table of Contents