Durabrand DBTV1341 Series Service Manual
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Durabrand DBTV1341 Series Service Manual

Color television/video cassette recorder
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DBVT1341 Series A
SERVICE MANUAL
COLOR TELEVISION/VIDEO CASSETTE RECORDER
ORIGINAL
MFR'S VERSION B
Design and specifications are subject to change without notice.

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Summary of Contents for Durabrand DBTV1341 Series

  • Page 1 DBVT1341 Series A SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION B Design and specifications are subject to change without notice.
  • Page 2 DBVT1341 SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION B MFR’S VERSION IC4001 LA71200M-MPB LA71201M-MPB Please file this revision with the original version.
  • Page 3 CORRECTION NOTICE MFR'S INCORRECT CORRECT REF.NO. DESCRIPTION REF.NO. DESCRIPTION VERSION PCB010 SYSCON PCB ASS'Y VMX210A PCB800 SYSCON PCB ASS'Y VMX210A Change of IC ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION B PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. IC4001 I03F3200M0 IC LA71200M-MPB...
  • Page 4 MICON SCHEMATIC DIAGRAM FROM/TO TV POWER (SYSCON PCB) (MFR'S VERSION B) DEGAUSS_H POWER_FAIL2 P.CON+5V SERVICE R1032 TP1001 C1056 AT+12V 0.1 F MOTOR_GND H_GND TV_POWER_H C1034 CYL/LOADING MOTOR DRIVER C1007 IC1004 LB11880 0.1 F 0.1 F R1029 C1035 C1078 B1001 FROM/TO Y/C/A/H.AMP 4.7K 220P CH 0.1 F...
  • Page 5 SPEC.NO. M578-05A O/R NO. K175001...
  • Page 6 CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5002 H5001 M101 NOTE: Applying positions AA and AB for the grease CLASS PART NO. MARK are displayed for this section. GREASE G-555G Check if the correct grease is applied for each MG-33 position.
  • Page 7 CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA and AB for the grease CLASS PART NO. MARK are displayed for this section. GREASE G-555G Check if the correct grease is applied for each position. MG-33...
  • Page 8 MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A5A303C720 CABINET,FRONT ASS'Y 85OP700037 HOLDER,LED 752WSA0230 SHIELD,CASE HEAD AMP 753WSA0118 PLATE,EARTH-SYSCON 899HV3T000 HOLDER,ANODE WIRE 702WPA0832 CABINET,BACK 761WPA0225 HOLDER,DECK 735WPAA267 BUTTON,REC 753WUAA006 SPRING,EARTH HEAD AMP 726000A023 SHEET,CRT SERVICEMAN 741WUA0019 SPRING,EARTH 85OP700038 HOLDER,END SENSOR 701WPJB518 CABINET,FRONT 722552A016 SHEET,RATING...
  • Page 9 CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A5A305A420K DECK ASSY A5A305A420K 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 810A123504 SEMS A M2.3x5.0 85OA400227 PINCH ROLLER BLOCK 8107226404 SCREW,TAP TITE(S) BIND 2.6x4 85OA500026 AHC ASS'Y 8102120604 SCREW,PAN M2x6 85OP200290 BELT,CAPSTAN (S)
  • Page 10 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R415 R002T22R2J RC 2.2 OHM 1/2W D536 D28TELS6N6 DIODE RECTIFIER 10ELS6N-TA1B2 ! R420 R801R7822F RC 8.2K OHM 1/10W D537 D1VT001330 DIODE,SILICON 1SS133T-77 ! R439 R801R7223F RC 22K OHM 1/10W D601...
  • Page 11 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION COILS &TRANSFORMERS MISCELLANEOUS ! L503 028R140031 COIL,DEGAUSS 8R140031 ! F502 081PC2R504 FUSE 51MS025LCC L601 0331920018 COIL 3192001 ! FB401 043213015R TRANSFORMER,FLYBACK 3213015R L603 02167F470J COIL FH501 06710T0006 HOLDER,FUSE EYF-52BC L607...
  • Page 12 M5A3-03C SPEC.NO. K1Y5017 O/R NO.
  • Page 13 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) BUFFER Q4012 2SC2412K R4041 1.8K FROM TV POWER P.CON+5V W858 FROM/TO IN/OUT C4058 FRONT_AUDIO 6.3V FRONT_VIDEO C4059 Y/C_AUDIO 0.1 F Y/C_VIDEO R4038 C4061 680K 0.01 F FROM/TO MICON Y/C_CLK Y/C_DATA Y/C_CS V.REC_ST_H C4016 COMP OUT 4Fsc CLOCK AUDIO...
  • Page 14 MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM TV POWER POWER_FAIL2 SERVICE R1032 TP1001 C1056 P.CON+5V 0.1 F MOTOR+12V C1034 0.1 F R1029 4.7K FROM/TO Y/C/AUDIO/HEAD AMP C1035 Y/C_CLK 220P CH Y/C_DATA C1031 R1044 Y/C_CS 0.001 B H.SW R1033 C1062 5.6K C1001 SD_VIDEO X_RAY X_RAY_SW...
  • Page 15 IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) NC NC C4206_1 0.0022 B FROM/TO SOUND AMP SOUND_GND SOUND+ SP_OUT FROM CHROMA/IF AT+5V INT-MONI FROM/TO MICON B.OUT IIC_OFF T-REC_LED REC_LED REC LED SW(AI) ON TIM/T-REC LED SW(TO) Q1007 Q1008 KRC102SRTK KRC102SRTK W866 FROM/TO TV POWER KEY_B KEY_A REMOCON_IN...
  • Page 16 CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) W829 11.0 FROM/TO MICON REG. Q606 PROTECT AT+5V REG. KTC3203_Y Q603 AT+5V D608 KTC3203_Y AT+5V_BACKUP REG. REG. SB140-EIC Q602 REG. Q605 KTC3203_Y Q604 OSD_R 2SD400E 2SD400E OSD_G W801 OSD_B OSD_BLK W895 TU_VIDEO B604 CF604 FROM/TO Y/C/AUDIO HEAD.AMP R620 AFT_M EFCT4R5MW5...
  • Page 17 SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO IN/OUT W808 SP_OUT SOUND+ SOUND_GND FROM MICON R359 TV_A_MUTE R353 TV_POWER_H C301 0.0068 FROM TV POWER SOUND+B C357 0.001 CH SOUND_GND FROM CHROMA/IF C355 R357 AUDIO_OUT 5.6K NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED ATTENTION: LES PIECES REPAREES PAR UN ETANT...
  • Page 18 POWER SCHEMATIC DIAGRAM (SYSCON PCB) 5A 125V 2.5A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V (F501) AND 2.5A 125V (F502) ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 5A 125V (F501) ET 2.5A 125V (F502)
  • Page 19 DEFLECTION SCHEMATIC DIAGRAM (SYSCON PCB) V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP UP 25.9 12.5 26.3 D402 1N4937 TO DY CP401 A1561WV2-A5P W840 R401 W857 R413 R416 1.8K FROM MICON H_CTL FROM/TO CHROMA/IF HS401 V_OUT 763WSAA013 V_FEEDBACK V801 W807 A34JXV70X53N45 L401 H.PLUSE 4.7mH 0909...
  • Page 20 CRT SCHEMATIC DIAGRAM (CRT PCB) 126.5 J801_1 HPS3200-010501 104.1 127.5 127.5 TP801 R802 BLUE AMP Q804_1 2SC4217 132.5 12K 1W R807 2.7K 1/4W R808 2.7K 1/4W R811 FROM CHROMA/IF TP802 CP851B (CP851A) C809 B2013H02-10P R805 GREEN AMP 470P B Q805_1 CUT_OFF CUT_OFF 2SC4217...
  • Page 21 OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) OS753 PIC-37143TH5 R766 1/4W Vout R778_1 R771_1 R772_1 R773_1 R774_1 1/4W 1K 1/4W 1.5K 1/4W 2.7K 1/4W 5.6K 1/4W R775_1 R776_1 R777_1 FROM/TO IN/OUT 1/4W 1K 1/4W 1.5K 1/4W CD757 (CP757_2) HEADPHONE_JACK CH2A019A J351 HTJ-035-28A REMOCON_IN AT+5V R350_1...
  • Page 22 INTERCONNECTION DIAGRAM J351 OPERATION PCB PCB030 HALL MAIN ROTOR TEXA28 SENSOR COIL MAGNET VIDEO AUDIO L FG SENSOR FRONT AV JACK J701_1 TM101 OS753 LOADING MOTOR M101 HALL HALL SWITCH 8 OHM CD352 LOGIC SOUND GND V.OUT SP OUT CP1001 SPEAKER CAP_FG SP351...
  • Page 23 WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP MICON POWER ON 11 PB 1.0V 20µs/div 0.5V 20µs/div 0.5V 0.5ms/div POWER ON POWER ON 13 PB 100mV 0.1µs/div 0.5V 10ms/div 1.0V 5ms/div DEFLECTION POWER ON 17 0.5V 5ms/div 1.0V 10µs/div 10mV 20us/div 10.0V 5ms/div 0.5V 1ms/div 1.0V 10ms/div 19 2.0V 20µs/div 1.0V 5ms/div...
  • Page 24 WAVEFORMS 20 200mV 20µs/div 21 50.0V 20µs/div 22 50.0V 20µs/div 50.0V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 25 MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 V801 PCB030 (OPERATION PCB) SP351...
  • Page 26 MECHANICAL EXPLODED VIEW FB401 PCB010 (SYSCON PCB)
  • Page 27 PRINTED CIRCUIT BOARDS SYSCON/CRT (INSERTED PARTS) SOLDER SIDE CD852 CD803 TP801 Q804_1 R802 R450 R807 D413 R808 R805 W813 Q805_1 W847 D412 R820 TP802 J801_1 D409 S107X C801 W123 R655_1 R440 W824 R456 S801 Q806_1 W836 R672 C438 W895 Q405 W018 L801 W823...
  • Page 28 PRINTED CIRCUIT BOARDS SYSCON/CRT (CHIP MOUNTED PARTS) SOLDER SIDE C4206_1 R352 C301 R353 R4201 R359 Q1007 Q1008 W903 R4043 R1070 R4054 R4041 Q4012 C4041 R4026 R1018 C1060 R4042 C4043 W818 R1035 R1033 Q4010 C1061 R1078 R1034 R1021 Q1024 C4069 C1062 Q4009 C1034 C1043...

  • Page 29: 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 30: Table Of Contents

    CONTENTS SERVICING NOTICES ON CHECKING .................. A1-1 HOW TO ORDER PARTS ....................... A1-1 CONTENTS ..........................A2-1 GENERAL SPECIFICATIONS ....................A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ..........B1-1 2. REMOVAL OF DECK PARTS .................... B2-1~B2-6 3.

  • Page 31: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 13 inch / 335.4mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G / 0.18G Color System NTSC Speaker 1Speaker Position Front Size x 2.5 Inch Impedance Sound Output 10%(Typical) System System Player / Recorder Video System NTSC...
  • Page 32 GENERAL SPECIFICATIONS Timer Rec Set Channel Setup TV/CATV Auto ch Memory Add/Delete Guide ch Set TV Setup V-chip Set On/Off Timer Set Picture Audio Sap On/Off Auto Repeat On/Off On/Off Timer Set System Setup Clock Set Language Auto Clock On/Off Standard Time Daylight Saving Time Commercial Advance...
  • Page 33 GENERAL SPECIFICATIONS CH Up CH Down Volume Up Volume Down Input Select Play F.Fwd Pause/Still Stop Rec/OTR Eject Counter Reset Speed Timer Rec TV Monitor Quick View Program Slow Auto Tracking Set/Tracking+ Set/Tracking - Menu Enter Cancel Call TV/Caption/Text Sleep Timer Muting Zero Return CM Skip...
  • Page 34 GENERAL SPECIFICATIONS Important Safeguard Dew/AHC Caution Sheet AC Plug Adapter Quick Set-up Sheet Battery UM size x pcs AC Cord AV Cord (2Pin-1Pin) Registration Card ESP Card 300 ohm to 75 ohm Antenna Adapter G-15 Interface Switch Power Play Pause/Still System Select One Touch Playback Channel Up...

  • Page 35: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS 1-3: TV/VCR BLOCK (Refer to Fig. 1-3) Remove the 2 screws 1. AND P.C. BOARDS Disconnect the following connectors: 1-1: BACK CABINET (Refer to Fig. 1-1) (CP757, CP351, CP401 and CP502). Remove the 5 screws 1. Unlock the support 2.

  • Page 36: Removal Of Deck Parts

    DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS NOTE In case of the Locker R installation, check if the two 2-1: TOP BRACKET (Refer to Fig. 2-1) positions of Fig.2-3-B are correctly locked. Extend the 2 supports 1. When you install the Cassette Side R, be sure to move Slide the 2 supports 2 and remove the Top Bracket.
  • Page 37 DISASSEMBLY INSTRUCTIONS 2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) Remove the screw 1. Remove the Loading Motor. Tension Connect Tension Band Remove the Worm. Tension Spring Tension Arm Ass'y Loading Motor Tension Holder Worm Main Chassis Fig. 2-7-B • Screw Torque: 3 ± 0.5kgf•cm Fig.
  • Page 38 DISASSEMBLY INSTRUCTIONS 2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A) Remove the T Brake Spring. Idler Gear Turn the T Brake Arm clockwise and bend the hook Idler Arm Ass'y section to remove it. Unlock the 2 supports 1 and remove the T Brake S Reel Band.
  • Page 39 DISASSEMBLY INSTRUCTIONS 2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/ P5 ARM ASS'Y (Refer to Fig. 2-10-A) Unlock the support 1 and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass'y. A/C Head Cassette Opener A/C Head Spring Pinch Roller Block A/C Head Base P5 Arm Ass'y •...
  • Page 40 DISASSEMBLY INSTRUCTIONS 2-13: AHC ASS'Y/CYLINDER UNIT ASS'Y 2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-13) (Refer to Fig. 2-15-A) Unlock the support 1 and remove the AHC Ass'y. Remove the E-Ring 1, then remove the Main Cam. Remove the E-Ring 2, then remove the Pinch Roller Disconnect the following connector: Cam and Joint Gear.
  • Page 41 DISASSEMBLY INSTRUCTIONS NOTE 2-18: CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig. 2-18-A) 1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. Remove the P4 Cap. Unlock the support 1 and remove the Cassette Guide (Refer to Fig.

  • Page 42: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 3. 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 43: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS REMOVAL AND INSTALLATION OF When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using FLAT PACKAGE IC a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 4-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 44 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 4-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 45: Key To Abbreviations

    KEY TO ABBREVIATIONS Audio/Control H.SW Head Switch Automatic Color Control Hertz Audio Erase Integrated Circuit Automatic Frequency Control Intermediate Frequency Automatic Fine Tuning Indicator AFT DET Automatic Fine Tuning Detect Inverter Automatic Gain Control Killer Amplifier Left Antenna Light Emitting Diode A.PB Audio Playback LIMIT AMP...
  • Page 46 KEY TO ABBREVIATIONS SYNC Synchronization SYNC SEP Sync Separator, Separation Transistor TRAC Tracking TRICK PB Trick Playback Test Point UNREG Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display V.PB Video Playback Variable Resistor V.REC Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source...

  • Page 47: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key simultaneously.

  • Page 48: Preventive Checks And Service Intervals

    PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time 1,000 1,500...
  • Page 49 PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE 2. TAPE RUNNING SYSTEM After cleaning the heads with isopropyl alcohol, do not When cleaning the tape transport system, use the run a tape until the heads dry completely. If the heads gauze moistened with isopropyl alcohol. are not completely dry and alcohol gets on the tape, 3.

  • Page 50: When Replacing Eeprom (Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On.

  • Page 51: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (For 2 heads model) (For 4 heads model) JG002B Adapter JG005 Post Adjustment VHS Alignment Tape VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver JG001 (VN S-LI6 ) JG001B (VN S-LI6 ) (10~90gf•cm) Part No. SV-TG0-030-000 JG001A (VN S-CO1 ) JG001I...

  • Page 52: Mechanical Adjustments

    MECHANICAL ADJUSTMENTS 1. CONFIRMATION AND ADJUSTMENT 1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION Read the following NOTES before starting work. Set to the PLAY mode. • Place an object which weighs between 450g~500g on Adjust the adjusting parts for the Tension Arm position the Cassette Tape to keep it steady when you want to so that the Tension Arm top is within the standard line of make the tape run without the Cassette Holder.
  • Page 53 MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE NOTE Install the Torque Gauge (JG002F) and Adapter (JG002B) If the torque is out of the range, replace the following on the S Reel. Set to the Picture Search (Rewind) mode. parts. (Refer to Fig.1-4-B) Check item Replacement Part Then, confirm that it indicates 120~180gf•cm.
  • Page 54 MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ 2-3: TAPE RUNNING ADJUSTMENT CONTROL HEAD (X VALUE ADJUSTMENT) When the Tape Running Mechanism does not work well, Confirm and adjust the height of the Reel Disk. adjust the following items. (Refer to item 1-1) Confirm and adjust the position of the Tension Post.
  • Page 55 MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 1. Tension Connect P4 Post 2. Tension Arm T Brake Spring 3. Guide Roller T Reel 4. Audio/Control Head S Reel 5. X value adjustment driver hole Adjusting parts for the Tension Arm position D1-4...

  • Page 56: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS (VCR SECTION) Read and perform these adjustments when repairing the 2-1: PG SHIFTER circuits or replacing electrical parts or PCB assemblies. Connect CH-1 on the oscilloscope to TP1002 and CH-2 CAUTION to pin 4 of CP1003.
  • Page 57 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: HORIZONTAL PHASE Receive the VHF HIGH (63dB). Receive the center cross signal from the Pattern Connect the digital voltmeter between the pin 5 of Generator. CP351 and the pin 1 (GND) of CP351. Using the remote control, set the brightness and Activate the adjustment mode display of Fig.
  • Page 58 ELECTRICAL ADJUSTMENTS 2-12: SUB CONTRAST MANUAL White 0% Receive the color bar pattern. (RF Input) Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (14) on the remote control to 100% select "CONTRAST".
  • Page 59 ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE CP1003 TP1001 TP4001 TP1002 TP601 VR401 VR502 TU601 FB401 CP351 FOCUS VOLUME SCREEN VOLUME SYSCON PCB TP801 TP803 J801 CRT PCB D2-4...
  • Page 60 ELECTRICAL ADJUSTMENTS 4. PURITY AND CONVERGENCE 4-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 4-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.
  • Page 61 TV BLOCK DIAGRAM V. OUTPUT IC IC401 AN5522 MICON/ OPERATION/ THERMAL IN/OUT PROTECTION Q602, Q603 Q606 AT+12V AT+5V_BACK UP REG. REG. AT+12V Q407 PUMP MICON/ Q604, Q605 H-CONTROL Q601 H_CTL OPERATION/ TU_AUDIO Y/C/AUDIO/ AT+5V IN/OUT REG. CCD/ TU_VIDEO BUFFER HEAD AMP Y/C_AUDIO Q405 Q406...

  • Page 62: Y/C/Audio/Ccd/Head Amp

    Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 3.579545MHz Q4010 Q4012 BUFFER BUFFER Y/C/AUDIO/CCD/HEAD AMP IC IC4001 LA71201M-N-MPB 4FSC VX01 3.58M BPF2 CP4001 CLAMP AUTO-BIAS Main CONV Y/C_CLK SP-CH2 (L) MICON/ SERAIL Y/C_DATA OPERATION/ DECODER SP_COM IN/OUT Y/C_CS B-UP SP-CH1 (R) C-LPF 3.58M BPF1 SYNC VIDEO...
  • Page 63 MICON/OPERATION/IN/OUT BLOCK DIAGRAM TIMER SYSCON MICON IC SW1001 IC1001 OEC7071A SYSTEM RESET IC RESET-L 1 OUT IC1003 TAB SW R3111N311A/C-TR POWER FAIL2 AT+5.6V POWER_FAIL_L MSSEN-A P. CON+5V X-OUT(12MHz) Q1023 MS_SEN A J701 X1001 Q1009 12MHz AUDIO L X_RAY_SW X-IN(12MHz) FRONT_VIDEO XC-OUT(32KHz) MSSEN-B X1002...

  • Page 64: Printed Circuit Boards Operation

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE SW799 SW794 SW792 SW793 SW795 SW797 J351 W003 R777_1 W805 C382 SW791 R773_1 R772_1 R774_1 W811 R766 R771_1 R350_1 OS753 SW798 W815 R778_1 SW796 C755_1 CD351_1 CD757 D793 D791...

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