Durabrand DCT2405R Service Manual
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3-2 TVN_SN 3. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it. With Soldering Iron: 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-
Durabrand DCT2405R, 8-3 Main 1/4 Schematic Diagram L3401SCM1 MAIN 1/4 Ref No. Position IC111 C-2 IC151 A-3 Q111 D-1 Q131 A-3 Q161 A-4 Q321 E-1 Q361 B-4 ICS TRANSISTORS Downloaded Free from http://www.free-service-manuals.com
Durabrand DCT2405R, IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and described in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended. It is important to note that this service manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It also is important to understand that these CAUTIONS an
Durabrand DCT2405R, 5-4 L3401EA 8. H. Position Adjustment Purpose: To obtain correct horizontal position of screen image. Symptom of Misadjustment: If H. Position is incorrect, horizontal position of image on the screen may not be properly displayed. Note: Use service remote control unit 1. Operate the unit for at least 20 minutes. 2. Enter the Service mode. (See page 5-1.) 3. Receive the monoscope pattern. 4. Press [8] button on the remote control unit. “H-P” is indicated. 5. Press [CH o / p] buttons on the service remote control unit so that the monoscope pattern will be 90±5% of display size and the circle is round. 6. Turn the power off and on again. (Main power button on the TV unit.)
Durabrand DCT2405R, 8-9 WF15 Q1511 Collector Q1511 Base WF3 WF14 Q1521 Collector Q1521 Base WF4 WF13 Q1531 Collector Q1531 Base WF5 BL3700F01012-2 CRT CBA Top View CRT CBA Bottom View CRT CBA Ref No. Position Q1511 A-2 Q1521 A-2 Q1531 A-2 CN1501 B-1 WH301B B-2 WH501B B-1 TRANSISTORS CONNECTORS Downloaded Free from http://www.free-service-manuals.com
Durabrand DCT2405R, 4-1 L3401DC CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route and dress the cables as they were. CAUTION! When removing the CRT, be sure to discharge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap. 2. Disassembly Method Note: (1) Order of steps in procedure. When reassembling, follow the steps in reverse
Durabrand DCT2405R, 7-4 CRT/H.V. Block Diagram L3401BLCRT MAIN CBA CRT CBA 7 4 8 6 11 10 9 RAMP-OUT V-RAMP-F/B H-DRIVE GREEN AMP BLUE AMP Q572 Q571 Q511 Q561 Q551, Q552 VR562VR561 PCC WIDTH T572 1 3 4 5 FBP-IN ACL V- DRIVE H- DRIVE DY551 D.Y. IC551 (V-DEFLECTION CONTROL) ANODE FOCUS SCREEN WH301B R G B HEATER ANODE GND V501 CRT FOCUS SCREEN GND JK1501 CN1501 WH501BWH501A VIDEO SIGNAL CN571 H.OUTPUT H.DRIVE +B PROTECT-3 DEF+B AMP 7 1 Q512 6 3 PULSE UP THERMAL PROTECTION SWITCHING P-ON-ON 5 (SWITCHING) (SWITCHING) W
5-3 L3401EA 4. H f 0 Adjustment Purpose: To get correct horizontal frequency. Note: Use service remote control unit. 1. Press [2] button on the service remote control unit and select H-ADJ mode. (By pressing [2] button the display will change from TV AGC to H-ADJ.) 2. Press [CH o / p] buttons on the service remote control unit so that display will change “0” ~ “7”. At this mo
Durabrand DCT2405R, 8-7 FOCUS-VR (UPPER SIDE) SCREEN-VR (LOWER SIDE) VR661 +B ADJ +B TP601 TP300 GND VR561 PCC VR562 WIDTH BL3700F01012-1 Main CBA Top View For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. CAUTION ! : ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V. 4A/125V CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some c
Durabrand DCT2405R, 20050721 14-1 L3401EL ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. NOTES: 1. Parts that are not assigned part numbers (---------) are not available. 2. Tolerance of Capacitors and Resistors are noted with the following symbols. MMA CBA MAIN CBA C.....±0.25% D.....±0.5%
Durabrand DCT2405R, 7-5 Power Supply Block Diagram L3401BLP 4A/125V F601 4A/125V LINE FILTER L601 AC601 AC CORD DEGAUSSING COIL DG691 CN691 PS691 BRIDGE RECTIFIER D605 - D608 HOT COLD T601 6 4 2 1 11 12 8 7 4 3 IC601 ERROR VOLTAGE DET Q601 Q602 LIMITER SWITCHING Q652 VR661 +B ADJ Q673 SWITCHING CONTROL Q672 Q681 Q696 RL601 +8V SWITCHING MAIN CBA +B DEF +B +5V-CTRL2 (TO PIN 18 OF IC111) P-ON+8V DG-ON-H (TO PIN74 OF IC111) +8V-CTRL (TO PIN40 OF IC111) AL+33V P-ON+5V AL+12V Q111 +B TP601 10 SWITCHING PROTECT-2 (TO PIN 67 OF IC111) BACK-UP PROTECT-1 (TO PIN68 OF IC111) Q682 P-ON+5V +5V-
20050721 14-3 L3401EL D676 ZENER DIODE MTZJT-7718A QDTA00MTZJ18 D685# SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D686 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D696# SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D801 ZENER DIODE MTZJT-773.0B QDTB0MTZJ3R0 D841# SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D842# ZENER DIODE MTZJT-775.1B QDTB0MTZJ5R1 ICS IC31 IC VIF/SIF M61116FP TF0G QSZBA0SHT034 IC11
Durabrand DCT2405R, WAVEFORMS L15WF 9-1 1DIV: 0.5V 20µs IC 111 Pin 26 WF1 GND 1DIV: 0.5V 20µs IC 111 Pin 14 WF2 1DIV: 2V 20µs Q1511 Base WF3 GND 1DIV: 2V 20µs Q 1521 Base WF4 GND Input: NTSC Color Bar Signal (with 1kHz Audio Signal) INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes. reconnect to AC outlet and then turn power on. (Brightness---Center Color---Center Tint --- Center Contrast---Approx 70% ) 1DIV: 0.2V 20ms IC 801 Pin 3 WF6 1DIV: 2V 20µs Q 1531 Base WF5 GND 1DIV: 10V 20µs Q 572 Collector WF7 GND 1DIV: 5V 20µs Q 571 Base WF8 WF1 ~ WF16 = Waveforms to be observed at Wavefo
Durabrand DCT2405R, 7-3 Audio Block Diagram L3401BLA MAIN CBA AUDIO SIGNAL A-MUTE VOLUME TO SYSTEM CONTROL BLOCK INPUT 0 INPUT 1 SCL SDA IC771 (INPUT SELECT) SW CTL 13 3 11 15 12 4 2 1 9 10 VCA STEREO FILTER 75uS DE-EMPH dBX DE-EMPH L+R FILTER WIDE BAND FILTER WIDE BAND RMS DET WIDE BAND EXPAND SPECTRAL EXPAND SPECTRAL RMS DET SPECTRAL FILTER OFFSET CANCEL L-CH R-CH MATRIX AGC OFFSET CANCEL L-R FILTER (L-R)/SAP SW SAP FILTER I2C DECORDER SAP DEMOD SAP OUT FILTER 29 30 TO IF/VIDEO BLOCK TUNER REAR FRONT TUNER REAR FRONT (L-CH) (R-CH) 21 27 24 IC431 (MTS/SAP AUDIO SIGNAL PROCESS) AUDIO-IN(L) (REAR) JK711 SIF JK711 AUDIO-IN(R) (REAR) JK702 AUDIO-IN
Durabrand DCT2405R, 11-2 L3702PIN 74 DG-ON-H Degaussing Coil Control 75 AGC AGC Voltage Input 76 PROTECT-3 Power Supply Protection 77 N.U. Not Used 78 N.U. Not Used 79 P-ON-H Output for P-ON-H 80 INPUT1 Input Select 1 Pin No. Signal Name Function Downloaded Free from http://www.free-service-manuals.com
Durabrand DCT2405R, 8-2 L15N_SC LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components
Durabrand DCT2405R, 8-1 L15N_SC SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the mark “#” in the schematic diagram and the parts list. Before replacing any of these components, read the parts li
Durabrand DCT2405R, 8-6 L3401SCM4 Main 4/4 & CRT Schematic Diagram CRT Ref No. Position Q1511 W-1 Q1521 W-1 Q1531 X-1 CN1501 X-2 WH301B V-2 WH501B V-3 TRANSISTORS CONNECTORS MAIN 4/4 Ref No. Position Ref No. Position IC551 S-3 CN571 T-3 WH301A V-2 Q511 S-2 WH501A V-3 Q512 S-2 Q551 T-3 TP601 U-2 Q552 T-3 Q561 U-3 VR561 U-3 Q571 U-2 VR562 U-3 Q572 T-2 VARIABLE RESISTORS CONNECTORSIC TEST POINT TRANSISTORS Downloaded Free from http://www.free-service-manuals.com
Durabrand DCT2405R, 2-1 TVN_ISP IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced. Safety Precautions for TV Circuit 1. Before returning an instrument to the customer, always make a safety check of the entire instrument, including, but not limited to, the following items: a. Be sure that no built-in protective devices are defective and have been defeated during servicing. (1) Protective
Durabrand DCT2405R, 20050721 13-1 L3401CA MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. NOTE: Parts that are not assigned part numbers (---------) are not available. Table 1 (V501 and DY551 Combination) Note 1: Purity and Convergence Adjustments must be performed following CRT replacement. Refer to Electr
Durabrand DCT2405R, 8-5 Main 3/4 Schematic Diagram L3401SCM3 CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. CAUTION ! : ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V. 4A/125V NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. *
Durabrand DCT2405R, WIRING DIAGRAM L3401WI 10-1 CRT CBA FOCUS SCREEN GND D.Y. DY551 HD VD MAIN CBA WH301A CN1501 1 2 CN691 CLN501 CLN301 AC601 1 2 3 4 5 1 2 3 4 5 CN571 5 4 3 2 1 WH301B GND RED GREEN BLUE V501 CRT ANODE L-CH R-CH 1 SP-L 2 SP801 SPEAKER CN801 1 SP-R 2 SP802 SPEAKER CN802 T571 FBT TU11 TUNER UNIT WH501AWH501B +8V GND RED GREEN BLUE +8V HEATER3 GND2 +200V1 GND 2 +200V 1 HEATER 3 CLN801 CLN802 SP-GND SP-GND Downloaded Free from http://www.free-service-manuals.com
Durabrand DCT2405R, 20050721 14-4 L3401EL R357 CHIP RES.(1608) 1/10W J 100 Ω RRXAJB5Z0101 R358 CHIP RES.(1608) 1/10W J 100 Ω RRXAJB5Z0101 R361 CHIP RES.(1608) 1/10W J 10k Ω RRXAJB5Z0103 R362 CARBON RES. 1/4W J 100 Ω RCX4JATZ0101 R363 CHIP RES.(1608) 1/10W J 47k Ω RRXAJB5Z0473 R417 CHIP RES.(1608) 1/10W J 180k Ω RRXAJB5Z0184 R422 CHIP RES.(1608) 1/10W J 8.2k Ω RRXAJB5Z0822 R423 CHIP RES.(1608) 1/10W J 4.7k Ω RRXAJB5Z0472 R427 CHIP RES.(1608) 1/10W J 8.2k Ω RRXAJB5Z0822 R428 CHIP RES.(1608) 1/10W J 4.7k Ω RRXAJB5Z0472 R445 CHIP RES.(1608) 1/10W J 3.3k Ω RRXA
12-1 L3401CEX EXPLODED VIEWS Cabinet PB4 B4 SP802 CLN802 A2 A6 A1 L1 L1 B4 SP801 B7 B3 B3 B3 B3 B2 B2 B2 B2 L2 L2 L3 L10 L2 L2 L2 L2 A5 A4 B2 B3 B4 PB6 PB6 L1 L1 L1 L1 B1 B5 B5 DG691 CLN551 See Electrical Parts List for parts with this mark. V501 Scotch Tape #880 Scotch Tape #880 CRT CBA MAIN CBA AC601 CLN801 V501-2 V501-1 DY551 Details for DY551 and surrounding parts SHINWHA TAPE SGT-730 (WHI
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