Durabrand DBTV2501 SERIES Service Manual
  1. Manuals
  2. Brands
  3. Durabrand Manuals
  4. TV Receiver
  5. DBTV2501 SERIES
  6. Service manual
Durabrand DBTV2501 SERIES Service Manual

Durabrand DBTV2501 SERIES Service Manual

Color television receiver
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
DBTV2501 SERIES A
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION A
Design and specifications are subject to change without notice.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DBTV2501 SERIES and is the answer not in the manual?

Questions and answers

Related Manuals for Durabrand DBTV2501 SERIES

Summary of Contents for Durabrand DBTV2501 SERIES

  • Page 1 DBTV2501 SERIES A SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR’S VERSION A Design and specifications are subject to change without notice.
  • Page 2 DBTV2501 SERIES A SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL 1 MFR’S VERSION B MFR’S VERSION A63AHC26X A63ADT15*08 Please file this revision with the original version.
  • Page 3 Change of CRT ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION B PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. ! R406 R903N8332J 3.3K OHM 1/8W R903N8100J OHM 1/8W ! R408 R4X5T6183F R,METAL 18K OHM 1/6W R4X5T6273F R,METAL 27K OHM 1/6W R410 R002T2821J 820 OHM 1/2W...
  • Page 4 PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE (MFR'S VERSION B) TP023 SW104 SW102 SW103 SW101 SW105 R806 OS101 CD806B TP024 FH501 W084 R804 R625 W015 TP022 F501 _A_V C530 W014 Q608 S501A W013 R802 X101 W012 S501B W011 W002 W010 S802X W857...
  • Page 5 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) (MFR’S VERSION B) FROM/POWER R645 AT+10V 5V REG Q601 KTC3203_Y 4.97 5V REG 5V REG Q604 Q605 2SD734 KTC3203_Y 15.0 W801 W802 CF604 Q606 R639 TPSRA4M50C00-A0 KTC3203_Y C647 R615 CF603 SFSH4.5MCB R638 8.2K R646 TO/ SOUND R634 10K STEREO+5V R642...
  • Page 6 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) (MFR’S VERSION B) CP802A CP802B B2013H02-10P S101 B2013H02-10P 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 IC401 LA78041 V_FEEDBACK HEATER HEATER HEATER...
  • Page 7 M3K0-04I SPEC.NO. A173518 O/R NO.

  • Page 8: 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 9: Table Of Contents

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

  • Page 10: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 25 inch / 626mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2Speaker Position Front Size 1.5 x 2.7 Inch Impedance Sound Output 0.75 + 0.75 W 10%(Typical) 0.5 + 0.5 W NTSC3.58+4.43 /PAL60Hz...
  • Page 11 GENERAL SPECIFICATIONS OSD Language English French Spanish OSD Language Setting English Clock and Sleep Timer Max Time 120 Min Timer Step On/Off Timer Program(On Tim / Off Tim) Wake Up Timer Timer Back-up (at Power Off Mode) more than G-10 Remote Unit RC-DW...
  • Page 12 GENERAL SPECIFICATIONS G-11 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip Type USA,ORION Type Auto Search CH Allocation Channel Lock Just Clock Function Game Position CH Label VM Circuit Full OSD Premiere Comb Filter Lines Auto CH Memory Hotel Lock...
  • Page 13 GENERAL SPECIFICATIONS G-13 Interface Switch Front Power System Select Main Power SW Sub Power Channel Up/Reset Channel Down/Enter Volume Up/Set Up Volume Down/Set Down Menu: Vol Up + Vol Down Rear AC/DC TV/CATV Selector Degauss Main Power SW Indicator Power Stand-by On Timer Terminals...

  • Page 14: 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 15 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 16: 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 17: 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 60dB monoscope pattern. circuits or replacing electrical parts or PCB assemblies. Connect the digital voltmeter to R606. Activate the adjustment mode display of Fig.
  • Page 18 ELECTRICAL ADJUSTMENTS "A" 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 19 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 20: Major Components Location Guide

    MAJOR COMPONENTS LOCATION GUIDE TP402 VR502 TU001 R606 FB401 CP601 FOCUS VOLUME SCREEN VOLUME MAIN PCB J801 TP022 TP024 CRT PCB D 3 - 1...

  • Page 21: Block Diagram

    BLOCK DIAGRAM Q351 MUTE SW. SOUND AMP IC TU001 IC351 AN7523 CH UP CHROMA IC IC601 M61206FP X602 3.579545MHz VOL UP X' TAL SP351 AUDIO OUT MICON IC CH DOWN RF AGC OUT IC101 OEC7045B CF601 SAW FILTER VIF IN (1) VOL DOWN Q606 AUDIO MUTE...

  • Page 22: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE SW102 SW105 SW104 SW103 SW101 TP023 R806 OS101 R804 FH501 FH502 W084 R625 W015 R802 F501 _A_V C530 Q608 W014 S501A W013 X101 W012 W011 W002 S501B W010 W857 W120 W072 PH003 R515 Q603 W069...
  • Page 23 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE C554_1 R553 C408_1 R356 R618 R650 R634 C650_1 C636_1 R639 C618 R633 C616 C114 R122 R646 IC101 R638 R133 R614 C128_1 R809 R619 R129 C811_1 C810_1 R811 R128 R126...
  • Page 24 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) TU001 ENV56D66G3 ACCESSORY FROM/TO CHROMA TM101 RC-DW020 C003 TUNER+5V R001 R002 18K 1/2W 18K 1/2W SYNC I2C_OFF Y_VIDEO MICON IC IC101 OEC7045B W862 R123 4.7K OSD_R P50/H.SYNC RED R W863 R122 4.7K OSD_G P51/V.SYNC GREEN G R109 W864 R121...
  • Page 25 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) FROM POWER R645 AT+10V 5V REG Q601 KTC3203_Y-AT 4.97 5V REG Q604 2SD734(E,F)-AA 15.0 W801 W802 CF604 Q606 R639 TPSRA4M50C00-A0 KTC3203_Y-AT C647 R615 CF603 SFSH4.5MCB R638 10K R646 27K TO SOUND C638_2 R634 10K STEREO+5V R612 5.6K 1/4W...
  • Page 26 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) CP802A CP802B 51048-1010 51048-1010 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 IC401 LA78041 V_FEEDBACK HEATER HEATER HEATER HEATER THERMAL V_OUT PROTECTION...
  • Page 27 POWER SCHEMATIC DIAGRAM (MAIN PCB) TO CHROMA AT+10V RELAY DRIVE Q504 D516 KTC3198-AT(Y,GR) 1SS133 TO DEFLECTION/CRT RY501 ALKS325 FBT+8V DEGAUSS COIL L503 8R250009 TO SOUND CP502 R517 TV-50P-02-A1 SOUND+B SOUND_GND R501 TH501_1 ZPB45BL3R0A 3.3 7W PH003 PH004 B504 D510 003P-2100 003P-2100 W5RH3.5X5X1.0 RU2AM-EIC...
  • Page 28 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM MICON/TUNER AUDIO_MUTE SOUND AMP IC IC351_1 AN7523 C709 220P CH FROM POWER SOUND+B W829 SOUND_GND W835 W825 SPEAKER FROM CHROMA CP351_1 TID-X02P-B2 SP351_1 W813 S0407F02 AUDIO_OUT W858 4OHM 2.5W STEREO+5V W828 MUTE SW. R354 Q351 KTC3198-AT(Y,GR) 4.7K 1/4W...

  • Page 29: Micon/Tuner

    WAVEFORMS MICON/TUNER 11 1V 20µs/div 1 1V 0.1µs/div 6 0.5V 20µs/div 12 1V 20µs/div 200mV 20µs/div 0.5V 20µs/div 3 200mV 20µs/div 20V 20µs/div 1V 20µs/div DEFLECTION/CRT 200mV 5ms/div 14 0.5V 5ms/div 9 200mV 20µs/div CHROMA 15 20V 20µs/div 0.5V 5ms/div 0.5V 2ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 30: Sound

    WAVEFORMS 16 2V 20µs/div 21 50V 20µs/div 1V 1ms/div 22 50V 20µs/div 200V 20µs/div POWER 23 5.0V 20ms/div 10V 5ms/div 24 500mV 5µs/div 10V 5ms/div SOUND 0.5V 1ms/div 50V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 31: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 FB401 V801 TU001 SP351 PCB010 (MAIN PCB)

  • Page 32: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 735WPA0562 BUTTON,ASS'Y 899HV3T000 HOLDER,ANODE WIRE 762WPA0009 HOLDER,CRT WIRE 723000B179 FILM,DECORATION 741WUA0021 SPRING,EARTH 701APJA057 CABINET,FRONT 713WPA0096 GUIDE,REMOCON 7230006856 SHEET,CAUTION 722552A006 SHEET,RATING 702APA0121 CABINET,BACK 7220001109 SHEET,HWC 723552A003 BADGE,BRAND 7240001041 SHEET,CSA WARNING 8110630A04 SCREW,TAP TITE (P) BRAZIER 3x10 810B130A04 SCREW/WASHER (B)

  • Page 33: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART. NO. DESCRIPTION REF. NO. PART. NO. DESCRIPTION RESISTORS DIODES R401 R4X5T6104F R, METAL 100K OHM 1/6W D517 D2WXN40050 DIODE, SILICON 1N4005-EIC R404 R903N8102J RC OHM 1/8W D518 D1VT001330 DIODE, SILICON 1SS133T-77 R405 R4X5T6223F R, METAL 22K OHM 1/6W D521 D1VT001330 DIODE, SILICON...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART. NO. DESCRIPTION MISCELLANEOUS CF603 1012T4R509 FILTER, CERAMIC SFSH4.5MCB-TF21 CF604 1012T4R519 FILTER, CERAMIC TRAP TPSRA4M50C00-A0 CP351 069W120019 CONNECTOR PCB SIDE TID-X02P-B2 CP401 069W340018 CONNECTOR PCB SIDE TS-80P-04-V1 CP502 069W420029 CONNECTOR PCB SIDE TV-50P-02-A1 069S420110 CONNECTOR PCB SIDE A1561WV2-2P CP601 0697260650 CONNECTOR PCB SIDE...
  • Page 35 M3K0-04G SPEC.NO. A153510 O/R NO.

Table of Contents