Daewoo CN-150 Service Manual
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Daewoo CN-150 Service Manual

Daewoo CN-150 Service Manual

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  • Page 2: Control View

    CONTROL VIEW REMOCON SENSOR POWER ON/OFF CH UP/DN ENTER MENU VOL UP/DN F-CONNECTOR 300 OHM-75 OHM COUPLING TRANSFORMER FROM 75 OHM VHF ANTENNA WITH CABLE OR CABLE TV SYSTEM...

  • Page 3: Important Service Notes

    IMPORTANT SERVICE NOTES 1. X-RAY RADIATION PRECAUTION * Minimum brightness Plug the AC line cord directly into a 120V AC outlet (do 1) Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such not use a line isola-tion transformer during this check). hazards, the high voltage must not be above the Use an AC voltmeter having 5000 ohms per volt or specified limit.
  • Page 4 BLOCK DIAGRAM - 5 -...

  • Page 5: General Adjustments

    GENERAL ADJUSTMENTS 1. GENERAL 1) Operate receiver for at least 15 minutes at 120V AC line. In the majority of cases, all color televisions will need only 2) Adjust all customer controls for normal picture and slight touch-up adjustment upon installation. Check the sound.
  • Page 6 8. SUB-BRIGHTNESS ADJUSTMENT 9-1. COLOR PURITY ADJUSTMENT 1) Tune in a color program. NOTE : Before attempting any purity adjustments, the receiver should be operated for at least 15 2) Set the CONTRAST control to maximum and the BRI- minutes. GHTNESS control to maximum and the SHARPNESS control to the center position.

  • Page 7: Convergence Adjustments

    9-2. CONVERGENCE ADJUSTMENTS B. CIRCUMFERENCE CONVERGENCE ADJUSTMENT NOTE NOTE : This adjustment requires Rubber Wedge Kit. : Before attempting any purity adjustments, the receiver should be operated for at least 15 1) Loosen the clamping screw on deflection yoke to allow minutes.
  • Page 8 10. PICTURE IF/AFT ADJUSTMENTS NOTE : THIS RECEIVER IS TRANSISTORIZED AND SPECIAL CARE MUST BE TAKEN WHEN SERVICING. READ THE FOLLOWING (NOTES BEFORE ATTEMPTING ALIGNMENT) Alignment requires an exacting procedure and should be undertaken only when necessary. Isolation transformer must be used to prevent shock hazard. The test equipment specified or its equivalent is required to perform the alignment properly.

  • Page 9: Troubleshooting Charts

    TROUBLE SHOOTING CHARTS NO POWER GO TO DOES RLY1 (RELAY) OPERATE? GO TO CHECK CHECK (7.5V IN/OUT VOLTAGES R413 18K OF I801(130VOLT REG) IN: 150V 2WATT DOES OUT: 130V SHUT DOWN CIRCUIT R414 20K OPERATE? I501 2WATT 130V CHECK RLY1 SHUT DOWN I801 RELAY...
  • Page 10 NO PICTURE CHECK THE WAVE FORM OF GO TO I501 #44 GO TO COMPOSITE VIDEO INPUT I501 LA 7674 Q506 Y-OUT VIDEO DRIVE C217 CONTRAST CHECK 190V CHECK BRIGHT LINE CONTROL H. BLANKING (MAX) 11 14 VOLTAGES #39:7.5V D404 T402 R554 Q501 #31:6.2V...
  • Page 11 NO SOUND GO TO CHECK FOR SIGNAL AT I501 #6 GO TO IF #4 IS OK & NO OUTPUT THEN I501 CHANGE I501 LA7674 CHECK CONNECTOR Q601 P601 AUDIO Q602,Q603 SOUND VOLUME T601 SP01 AUDIO MAX: ~7V TSP1036 SPEAKER MIN: ~1V VOL-UP DOWN I701...

  • Page 12: Ch Don't Stop

    CH DON'T STOP GO TO GOOD CHECK INPUT SIGNAL CONDITIONS LOSS OF SIGNAL OR WEAK SIGNAL IF OUTPUT 8, 9 U001 TUNER CHECK ADJUST AFT WINDOW RF AGC VTG. R555 1.6V ~ 3.4V 12 15 16 Q507 AFT DETECTOR I501 I701 LA7674 ADJUST...

  • Page 13: No Vertical Deflection

    NO COLOR CHECK MAX. TINT APC FILTER COLOR X501 MAX. I501 LA7674 CHECK CRYSTAL CHECK COMPOSITE C517 VIDEO DRIVE Q951 TO CRT Q956 LUMINANCE (-Y) 190V LINE CHECK CONNECTOR P101 NO VERTICAL DEFLECTION CHECK 9V CHECK VERT.OUT I501 I301 LA7674 LA7837 CHECK 25V R301...

  • Page 14: Remote Control Does Not Operate

    ON SCREEN DISPLAY DOES NOT OPERATE CHECK FOR 60Hz Vsync R, G, B, YS I701 CHECK Hsync IF OSD DOES NOT OPERATE, CHANGE I701 CHECK FOR 15, 734Hz OSC CHECK CAPTION DISPLSY DOES NOT OPERATE COMPOSITE VIDEO 2Vpp R, G, B, YS CHECK I701 IF CAPTION...
  • Page 15 DESCRIPTION OF SEMICONDUCTORS LA7674 (VIF/SIF/VIDEO/CHROMA/DEFLECTION) 1. Case Outline : SDIP 52P 2. Pin Connections/Block Diagram I501 LA7674 IF/VIDEO/CHROMA/DEF LOCK VIDEO EX A RF AGC VIDEO RF AGC AV S.W TINT EX. V CONT TINT KILL- VIDEO COLOR BLACK EXPAND SHARP SHARP SOFT CLAMP...
  • Page 16 LSC420142B/43B (TUNING CONTROL) 1) Case Outline : DIP-42S plastic package 2) Function: C-MOS 4 bit microcomputer, PWM control, CHANNEL SEARCH/MEMORY, ON/OFF, timer, sleep time, on screen display, TV/CATV (STD,HRC,IRC) 3) PIN connections OSC1 RESET OSC2 PC4/PAMIN PC2/ADCIN PB7/DA7 PB6/DA6 PB5/DA5 PB4/DA4 PB3/DA3 PB2/DA2...
  • Page 17 DESCRIPTION OF SEMICONDUCTORS AND TUNER TUNER(U001) DATA +12V VERTICAL OUTPUT(I301) PUMP-UP OUTPUT VERT TRIGGER POWER SUPPLY INPUT FOR V-OUT +25V 50/60Hz OSC BLOCKING ONE SHOT V-OUT AC/DC FEED BACK RAMP GEN. VERT.HEIGHT EEPROM(I702) 130V REGULATOR(I801) OUTPUT BASE CLOCK DATA GROUND INPUT...

  • Page 18: Safety Precautions

    SAFETY PRECAUTIONS Product safety servicing guidelines for color This corresponds to 0.5 milliamp A.C. Any value exceeding this limit constitutes a potential shock hazard television receivers and must be corrected immediately. CAUTION : Do not attempt to modify this product in any A.C.

  • Page 19: Subject : Implosion

    be run up and down while monitoring the high voltage with 2. Avoid conditions of high humidity such as : Outdoor patio installations where dew is a factor. Near steam a meter to be certain that the high voltage does not radiators where steam leakage is a factor, etc.

  • Page 20: Replacement Parts List

    WARNING:BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATOIN,PRECAUTION "SAFETY PRECAUTION" AND "PROUCT SAFETY NOTICE" ON PAGE1 OF THIS MANUAL REPLACEMENT PARTS LIST LOC. PART-CODE PART-NAME PART-DESC C101 CCZF1E103Z C CERA 25V F 0.01MF Z (AXIAL) C102 CCZF1E103Z C CERA 25V F 0.01MF Z (AXIAL) C103 CCZF1E103Z C CERA...
  • Page 21 LOC. PART-CODE PART-NAME PART-DESC C508 CZSL1H330J C CERA 50V SL 33PF J (AXIAL) C509 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C510 CZSL1H330J C CERA 50V SL 33PF J (AXIAL) C511 CZCH1H200J C CERA 50V CH 20PF J (AXIAL) C512 CCZF1E103Z C CERA...
  • Page 22 LOC. PART-CODE PART-NAME PART-DESC C709 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C710 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C713 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C714 CCZB1H101K C CERA 50V B 100PF K (AXIAL) C715 CCZB1H101K C CERA...
  • Page 23 LOC. PART-CODE PART-NAME PART-DESC D404 D1N4937GP- DIODE 1N4937GP (TAPPING) D405 D1N4937GP- DIODE 1N4937GP (TAPPING) D501 DUZ9R1BM-- DIODE ZENER UZ-9.1BM D502 D1N4148--- DIODE 1N4148 (TAPPING) D503 D1N4148--- DIODE 1N4148 (TAPPING) D504 D1N4148--- DIODE 1N4148 (TAPPING) D505 D1N4148--- DIODE 1N4148 (TAPPING) D506 D1N4148--- DIODE 1N4148 (TAPPING)
  • Page 24 LOC. PART-CODE PART-NAME PART-DESC I801G 4857619500 INSU PLATE SILICON RUBBER T0.3 IL01 1SR9VP---- IC PREAMP SR-9VP L101 58C5580019 COIL CHOKE TRF-9225 (0.55UH) L102 58C5580019 COIL CHOKE TRF-9225 (0.55UH) L401 58H0000016 COIL H-LINEARITY (20") L-102 (102UH) L401 58H0000019 COIL H-LINEARITY (14") L-178 L402 58C0000026...
  • Page 25 LOC. PART-CODE PART-NAME PART-DESC Q506 TKTA1270Y- KTA1270Y Q507 TKTC3198Y- KTC3198Y Q601 TKTC1026Y- KTC1026-Y Q602 TKTA940--- KTA940 Q603 TKTC2073-- KTC2073 Q701 TKTA1266Y- KTA1266Y Q702 TKTC3198Y- KTC3198Y Q703 TKTC3198Y- KTC3198Y Q704 TKTC3207-- KTC3207 Q705 TKTC3198Y- KTC3198Y Q706 TKTC3198Y- KTC3198Y Q707 TKTC3198Y- KTC3198Y Q708 TKTC3205Y- KTC3205Y...
  • Page 26 LOC. PART-CODE PART-NAME PART-DESC R311 RS01Z209J- R M-OXIDE FILM 1W 2 OHM J R312 RD-2Z621J- R CARBON FILM 1/2 620 OHM J R313 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R314 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R315 RV5426223P R SEMI FIXED...
  • Page 27 LOC. PART-CODE PART-NAME PART-DESC R520 RD-4Z561J- R CARBON FILM 1/4 560 OHM J R521 RD-AZ684J- R CARBON FILM 1/6 680K OHM J R522 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R524 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R525 RD-AZ274J- R CARBON FILM...
  • Page 28 LOC. PART-CODE PART-NAME PART-DESC R703 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R704 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R705 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R706 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R707 RD-AZ101J- R CARBON FILM...
  • Page 29 LOC. PART-CODE PART-NAME PART-DESC R752 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R753 RD-AZ133J- R CARBON FILM 1/6 13K OHM J R754 RD-2Z363J- R CARBON FILM 1/2 36K OHM J R755 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R757 RD-AZ303J- R CARBON FILM...
  • Page 30 LOC. PART-CODE PART-NAME PART-DESC R962 RD-2Z332J- R CARBON FILM 1/2 3.3K OHM J R963 RD-2Z332J- R CARBON FILM 1/2 3.3K OHM J R964 RD-2Z332J- R CARBON FILM 1/2 3.3K OHM J R965 RS02Z123J- R M-OXIDE FILM 2W 12K OHM J (TAPPING) R966 RS02Z123J- R M-OXIDE FILM...

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