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Orion 21MT9A Service Manual

Color television receiver
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21MT9A
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION B
Design and specifications are subject to change without notice.

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Summary of Contents for Orion 21MT9A

  • Page 1 21MT9A SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR’S VERSION B Design and specifications are subject to change without notice.

  • Page 2: 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 3: Table Of Contents

    CONTENTS SERVICING NOTICES ON CHECKING ...................... A1-1 HOW TO ORDER PARTS ........................... A1-1 IMPORTANT ..............................A1-1 TO CANCEL HOTEL LOCK ........................A1-1 CONTENTS ..............................A2-1 GENERAL SPECIFICATIONS ........................A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ......................2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..............B-2, B-3 SERVICE MODE LIST ..........................

  • Page 4: General Specifications

    GENERAL SPECIFICATIONS G-1.Outline of the Product 21 inch(544.5mmV):Measured diagonally Color CRT 90 degree deflection G-2.Broadcasting System CCIR 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.Tuner and Receiving Tuner : Contactless Electric Tuner Oscar(W/O HYPER) Oscar(W/ HYPER)
  • Page 5 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 ºC~ 40 ºC Storage ºC~ 60 ºC G-20.Operating Humidity Less than G-21.Clock and Timer Sleep Timer...
  • Page 6 GENERAL SPECIFICATIONS G-26.OSD Language OSD Language Setting Not Applicable G-27.Speaker P o s itio n Front Side Bottom Size 6 1/4 x 2 1/4 inches Imp. ohm x Power 1.25 + 1.25 W 1.0 + 1.0 W (Typical) G-28.EXT Speaker : G-29.Carton Master Carton: Need...
  • Page 7 GENERAL SPECIFICATIONS G-32.Switch Front Power(Tact) Channel Up Volume Up System Select Channel Down Volume Down Main Power SW Sub Power Rear AC/DC TV/CATV Selector Degauss Main Power SW G-33.Magnetic Field BV : +0.45G BV : +0.35G BV : +0.25G BH : 0.18G BH : 0.30G...

  • Page 8: 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 9: 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. 2-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 10 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. 2-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 11: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. The SERVICE MODE dose not funtion if the clock has been set. if so, unplug AC cord to set the clock to the nonclock setting mode. To enter the Service Mode, press both set key and remote control key for more than 1 second.

  • Page 12: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. BEFORE MAKING ELECTRICAL 1. AGC AUTO ADJUSTMENTS 2. RF AGC DELAY Read and perform these adjustments when repairing the 3. VIDEO LEVEL circuits or replacing electrical parts or PCB assemblies. 4. FM LEVEL 5. OSD H CAUTION 6.
  • Page 13 ELECTRICAL ADJUSTMENTS 1. AKB AUTO 2. R. BIAS 3. G. BIAS 4. B. BIAS 5. R. DRIVE 6. G. DRIVE 7. B. DRIVE 0. RETURN Fig. 2-3 100% Fig. 2-5 2-6: BRIGHTNESS Receive the monoscope pattern. (RF Input) 2-8: CONTRAST Using the remote control, set the brightness and contrast to normal position.
  • Page 14 ELECTRICAL ADJUSTMENTS 2-11: VERTICAL SIZE 2-14: TINT Receive the monoscope pattern. Receive the color bar pattern.(Audio Video lnput) Using the remote control, set the brightness and contrast Connect the oscilloscope to TP801. to normal position. Activate the adjustment mode display of Fig. 2-1 and Activate the adjustment mode display of 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 L204 TP202 VR501 IC201 CP101 TP501 TU001 FB401 J753 J752 FOCUS VOLUME SCREEN VOLUME MAIN PCB TP801 TP802 J801 CRT PCB D3-1...

  • Page 17: Block Diagram

    IC352 AN7523 BLOCK DIAGRAM SP351 SOUND AMP DECORDER IC DATA SLICER IC SPEAKER IC850 ET106 IC851 ET317 (MONO) IC SP352 Q851 X850 SPEAKER BUFFER 13875KHz IF/CHROMA IC TU001 IC201 LA76812 SDA SCL CLAMP CH DOWN Q302 A_MUTE SW Q103 Q852 CH UP/DOWN IF/RF AGC BUFFER...

  • Page 18: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE C420 D404 R430 W053 CP401 S801Y D410 C448 R408 C435 J753 R421 J752 L401 R422 W099 IC402 CP803A C003 R756 C426_1 C427 C409 Q754 L001 W935 C767 R432 HEATER C417 R407_2 R401 C444_1 D001 R425...
  • Page 19 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE R138 Q103 R102 R101 R103 C118 R123 Q102 R130 C112 R129 R127 C120 IC101 C124 Q101 R133 C108 W869 C105 C123 C121 C107 R121 R122 W120 W894 W098 W819 C704 Q701 Q611 C719 W156...

  • Page 20: T' Text/Front Av Jack

    PRINTED CIRCUIT BOARDS T' TEXT (CHIP MOUNTED PARTS) T' TEXT (INSERTED PARTS) SOLDER SIDE SOLDER SIDE W867 CP852B W003 W002 CP851B W854 C864 W863 W858 C867 C877 W005 W861 R875 R885 Q852 IC851 W001 IC850 R880 R867 C876 B850 R852 W851 W008 W868...
  • Page 21 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 GP1U281Q PH001 003P-2100 TU001 TUWOF4EG-771F2 S902Y 5.0 4.8 0.0 PH002 R107 003P-2100 R105 C003 TEST POINT TP001 CP101_1 8283_0612_00_000 B101 MEMORY IC IC102 BLM21A601SPT C007 I2C_SCL S-24C08ADPA-01 FROM DEFLECTION/CRT I2C_SDA 0.01 B C008 I2C_OFF FBT_5V 0.01 B MODE...
  • Page 22 IF/CHROMA/SOUND AMP SCHEMATIC DIAGRAM (MAIN PCB) TO SOUND W896 W859 FBT_5V FROM/TO JACK TUNER_AUDIO_R AV_AUDIO C645 AV_VIDEO_2 220P TU_VIDEO_OUT DET_OUT W803 FROM JACK BUFFER Q611 D401 R435 FBT_9V 2SA1037AK FBT_5V MTZJ5.6B C655 W900 47P CH FROM/TO VIDEO/R.G.B SWITCH R434 VIDEO_OUT[1] AV_VIDEO_1 CLMP CLMP...
  • Page 23 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM IF/CHROMA/SOUND AMP FBT_5V CP701 FRONT AV JACK 8283_0712_00_000 R710 TO JACK R704 C712 R711 BUFFER Q701 EXT_VIDEO_IN 2SC2412K EXT_AUDIO_IN[L] FROM IF/CHROMA/SOUND AMP W819 SOUND_SP[-] SOUND_SP[+] CP351_1 CD351_1 TID-X02P-B2 SPEAKER CH22060A 4 OHM 2.5W SP351_1 MS-2D6SB02-1 SPEAKER 4 OHM 2.5W...
  • Page 24 POWER SCHEMATIC DIAGRAM (MAIN PCB) 1A 250V 2A 125V 4A 250V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 4A 250V(F501) ,1A 250V(F502) AND 2A 125V (ICP501) ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE ,1A 250V(F502) ET 2A 125V (ICP501)
  • Page 25 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) S902X S903X CLAMP CLAMP FROM/TO IF/CHROMA/SOUND AMP G.OUT G.OUT B.OUT B.OUT R.OUT R.OUT CLAMP V-OUT IC CP802A G.OUT CD802 CP802B IC401 LA7840 51048-0510 2E054201 51048-0510 B.OUT R.OUT THERMAL PUMP PROTECTION V_OUT CORE FERRITE L802 AMP - ESD-R-30SD H_OUT 15.3...
  • Page 26 JACK SCHEMATIC DIAGRAM (MAIN PCB) FROM MICON/TUNER AV SIGNAL SWITCHER IC IC751 LA7151 CH1(L) CH2(R) VIDEO SW IC IC701 NJM2245L BUFFER BIAS 0 NC C766 L753 L701 10uH 10uH 0607 FROM/TO IF/CHROMA/SOUND AMP AV_VIDEO_2 DET_OUT R776 FROM SOUND EXT_VIDEO_IN EXT_AUDIO_IN[L] FROM/TO VIDEO/R.G.B SWITCH MONO AV OUT J753...
  • Page 27 VIDEO/R.G.B SWITCH SCHEMATIC DIAGRAM (MAIN PCB) FROM IF/CHROMA/SOUND AMP C608 TEXT-R C607 TEXT-G C606 W850 TEXT-B W879 TEXT-Y W809 FROM/TO IF/CHROMA/SOUND AMP W894 VIDEO_OUT[1] AV_VIDEO_1 FROM/TO JACK PCB010 TM9430 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST...
  • Page 28 FRONT AV JACK SCHEMATIC DIAGRAM (FRONT AV JACK PCB) PCB280 TE9A14A FROM/TO SOUND F_A/V_IN(MONO) CD701 J702 CH27088A LPR6520-7200C V_IN A_IN_L A_IN_L A_IN V_IN V_IN NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE G-15 G-16...
  • Page 29 T’TEXT SCHEMATIC DIAGRAM (T’TEXT PCB) W864 W868 SYNC BUFFER C870 W857 Q852 R870 2SC2412K 1.46 W851 DECORDER IC IC850 ET106 C887 FLAG2 TEST5 56P CH W861 TO IF/CHROMA/SOUND AMP B850 R854 DATA SLICER IC BUFFER FLAG1 SYNC (CP851A) CP851B Q851 IC851 ET317 C855...

  • Page 30: Micon/Tuner

    WAVEFORMS MICON/TUNER IF/CHROMA/SOUND AMP 2V. 500µs/div 0.5V. 20µs/div 1V. 20µs/div 2 2V. 500µs/div 7 0.5V. 20µs/div 12 1V. 20µs/div 1V 0.1µs/div 0.5V. 20µs/div 1V. 20µs/div 2V 200 µs/div 4 200mV. 20µs/div 1V. 0.5ms/div 10 20V. 20µs/div 5 200mV. 5ms/div 16 200mV. 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 31: T' Text

    WAVEFORMS JACK µ 17 0.5V. 5ms/div 10V 5ms/div 200mV 20 s/div DEFLECTION/CRT 20V 5ms/div 20V 5ms/div 0.2V 0.2ms/div T' TEXT µ µ 50KV 20 s/div 50V 20 s/div 0.5V 20ms/div µ µ 10V 20 s/div 26 50KV 20 s/div µ µ...

  • Page 32: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 PCB150 V801 (T' TEXT PCB) FB401 SW501 TU001 SP352 PCB010 (MAIN PCB) SP351 PCB280 (FRONT AV JACK PCB)

  • Page 33: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A3G818C720 CABINET,FRONT ASS'Y 701WPJB350 CABINET,FRONT 711WPDA395 PLATE,DISPLAY 713WPAA010 GUIDE,REMOCON 713WPA0077 GLASS,LED 7232020561 BADGE,BRAND 735WPAA304 BUTTON,CHANNEL 735WPAA305 BUTTON,BASE 735WPA0383 BUTTON,POWER 743WKA0035 SPRING,BUTTON 769WSAA003 WASHER 9.5x22xT2 800WR0A003 SHEET,CRT SUPPORT 741WUA0001 SPRING,EARTH 752WSAA013 SHIELD,LID 899HV3T000 HOLDER,ANODE WIRE 702WPAA098 CABINET,BACK 722202A514...

  • Page 34: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES R401 R3X181102J R,METAL OXIDE OHM 1W D508 D28T10ELS6 DIODE,RECTIFIER 10ELS6TA1B2 R408 R6558A1R5J R,FUSE 1.5 OHM 2W D509 D94TA36011 DIODE,ZENER HZ36-1L TD R416 R3X281330J R,METAL OXIDE 33 OHM 1W ! D510 D28I15DF60 DIODE,SILICON...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION COILS &TRANSFORMERS MISCELLANEOUS ! L502 029A000002 COIL,LINE FILTER AC FK0B160MH14 FH502 06710T0006 HOLDER,FUSE EYF-52BC ! L503 028H200015 COIL,DEGAUSS 8H200015 FH503 06710T0006 HOLDER,FUSE EYF-52BC L504 02AXB9A971 CORE,FERRITE ESD-R-30SD FH504 06710T0006 HOLDER,FUSE...
  • Page 36 SPEC.NO. M3G8-18C W153018 O/R NO.

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