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Memorex MT1194 Service Manual

Color television receiver
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MT1194
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION A
Design and specifications are subject to change without notice.

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Summary of Contents for Memorex MT1194

  • Page 1 MT1194 SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR'S VERSION A 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 CONTENTS ..............................A2-1 GENERAL SPECIFICATIONS ........................A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ......................... B1-1 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..............B2-1, B2-2 SERVICE MODE LIST .............................

  • Page 4: General Specifications

    GENERAL SPECIFICATIONS G - 1 CRT Size / Visual Size 19 inch / 480.0mmV S ystem CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 1Speaker Position Bottom Size 3 Inch Impedance Sound Output 1.5 W 10%(Typical) 1.0 W NTSC3.58+4.43 /PAL60Hz...
  • Page 5 GENERAL SPECIFICATIONS Color Stream Channel(TV/Cable) CH Label Sleep Timer Sound Mute V-chip Rating G - 8 OSD Language English French Spanish G - 9 Clock and Sleep Timer Max Time 120 Min Timer Step On/Off Timer Program(On Timer / Off Timer) Wake Up Timer Timer Back-up (at Power Off Mode) more than...
  • Page 6 GENERAL SPECIFICATIONS Channel Lock Just Clock Function Game Position CH Label VM Circuit Full OSD Premiere Comb Filter Lines Auto CH Memory Hotel Lock Closed Caption Stable Sound Energy Star Power On Memory Favorite CH G - 1 2 Accessories Owner's Manual Language English / Spanish...
  • Page 7 GENERAL SPECIFICATIONS Gross (Approx.) 20.0kg ( 44.1lbs) G - 1 6 C ar ton Master Carton Content ---- Sets Material Dimensions W x D x H(mm) x -- x -- Description of Origin Gift Box Material Double/Brown Dimensions W x D x H(mm) x 526 x 472 Design...

  • 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. 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 12: 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. Table 1 Enter DATA SET mode by setting VOLUME to minimum.

  • Page 13: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: CUT OFF Read and perform these adjustments when repairing the Adjust the unit to the following settings. circuits or replacing electrical parts or PCB assemblies. R.DRIVE=10, B.DRIVE=10, R.BIAS=64, G.BIAS=64, B.BIAS=64, BRI.CENT=105, CONT.MAX=65. CAUTION Place the set with Aging Test for more than 15 minutes.

  • Page 14: Using The Adjustment Control, Set The Brightness And Contrast To Normal Position

    ELECTRICAL ADJUSTMENTS 2-8: OSD HORIZONTAL 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) "A" Fig. 2-1 00 OSD H 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 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CD803 CRT PCB CP806 TU001 FB401 TP022 TP023 CP801 CP502 S501B CD501 S501A CD101A SPEAKER CD101B MAIN PCB...

  • Page 17: Block Diagram

    BLOCK DIAGRAM TU001 11 12 CH. DOWN IC1001 AN7511 VOL. DOWN SPEAKER SOUND AMP CH. UP SP1001 RGB Proc.2 VOL. UP Q801 OSD SW CONTRAST BRIGHTNESS RED OUT RGB OUTPUT Chroma Proc. Stage DRIVE Q802 ACC/C-BPF CUT OFF APC/KILLER OS101 GREEN OUT HV BLK RGB Proc.1...

  • Page 18: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE R403 W066 C406 C435 W003 C442 D405 C403 D410 CD803A W008 CP803A C434 D412 FB401 R408 W845 W801 Q402 W001 W062 R427 W011 HS402 R542 Q401 R446 HS501 D409 R448 R503 D506 C410 Q501 R449...
  • Page 19 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R701 R703 R702 R704 R101 R128 IC199 R1003 R1005 R610 R609 R1004 R627 TCD460A R129 R420 R418 TMD604A...
  • Page 20 MICON/CHROMA/TUNER SCHEMATIC DIAGRAM (MAIN PCB) H.CTL Q607 KTC3198 R621 220 1/4W R618 FROM/TO DEFLECTION/CRT C118_1 R608 CLAMP C632_1 1K 1/4W 6.3V R110 10K 1/4W C101 V_OUT R109 10K 1/4W 0.01 B V_FEEDBACK AT+5V ABCL H_OUT R123 P.CON+5V X-RAY 10K 1/4W 1 CNVSS 41 NC C623_1...
  • Page 21 TV POWER SCHEMATIC DIAGRAM (MAIN PCB) CAUTION :FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE 4A 125V (F501) FUSE. ATTENTION 4A 125V :POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 4A 125V (F501). TO SOUND/AV R517 D505...
  • Page 22 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) CD802 CP802A B2013H02-5P CP802B B2013H02-5P FROM MICON/CHROMA/TUNER CLAMP CLAMP CLAMP CLAMP CLAMP G.OUT G.OUT G.OUT G.OUT G.OUT R.OUT R.OUT R.OUT R.OUT R.OUT B.OUT B.OUT B.OUT B.OUT B.OUT V-OUT IC IC401 LA78040N-E CD803 CP803A B2013H02-3P CP803B B2013H02-3P HEATER HEATER HEATER...
  • Page 23 SOUND/AV SCHEMATIC DIAGRAM (MAIN PCB) RCA JACK WHITE J703 TO MICON/CHROMA/TUNER (FRONT) AV1-09D-4 ACCESSORY R703 AUDIO 2 AUDIO_IN2 A_IN R704 V_IN VIDEO 2 VIDEO_IN2 RCA JACK YELLOW TM101 J702 RC-DW110 AV1-09D-3 W807 FROM TV POWER CD101A SPEAKER SOUND_GND CH012002 SOUND+B CD101B SP1001 CH012003...

  • Page 24: Micon/Chroma/Tuner

    WAVEFORMS MICON/CHROMA/TUNER 1 0.5V 2ms/div 6 1V 20µs/div 200V 20µs/div 20V 20µs/div 1V 20µs/div 10V 5ms/div DEFLECTION/CRT 10V 5ms/div 3 200mV 20µs/div 8 0.5V 5ms/div 0.5V 5ms/div 9 20V 20µs/div 50V 20µs/div 10 2V 20µs/div 5 1V 20µs/div 15 50V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 25: Sound/Av

    WAVEFORMS 16 50V 20µs/div SOUND/AV 0.5V 1ms/div 1V 1ms/div 200mV 500µs/div 20 500mV 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 26: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB ASS'Y) L503 FB401 TU001 V801 101D 101C PCB010 (MAIN PCB ASS'Y) 101B SP1001 101A...

  • Page 27: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 7A701A126A FRONT CABI ASS'Y 101A 701WPJC696 CABINET,FRONT 101B 713WPAA124 GUIDE,REMOCON 101C 735WPBB125 BUTTON,FRAME 101D 735WPAA610 BUTTON,BASE A3R107Q740 CABINET,BACK ASS'Y 702WPAA476 CABINET,BACK 702WPAA504 CABINET,BACK 702WPAA680 CABINET,BACK 735WPAA647 HOLDER,SPEAKER 722A08A148 SHEET,RATING 741WUA0019 SPRING,EARTH 8994201000 HOLDER,CRT WIRE 899HV3T000 HOLDER,ANODE WIRE...

  • Page 28: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES R402 R3T181010J R,METAL OXIDE OHM 1W D511 D1VT001330 DIODE,SILICON 1SS133T-77 R3K581010J R,METAL OXIDE OHM 1W ! D512 D1VT001330 DIODE,SILICON 1SS133T-77 R404 R63581010J R,FUSE OHM 1W D513 D28T21DQN9 DIODE SCHOTTKY 21DQ09N-TA2B1...
  • Page 29 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS FH502 06710T0009 HOLDER,FUSE EYF-52BCY OS101 077Q000025 REMOTE RECEIVER KSM-713SY SP1001 070Y132018 SPEAKER S08F21 ! TH501 D8EE0B1400 DEGAUSS ELEMENT B59203-S1060-B14 TM101 076N0DW110 TRANSMITTER RC-DW110 TU001 0163100011 RF UNIT ENG36A01GY 0163300005 RF UNIT 115-V-K015AR_B ! V801 098Q200490...
  • Page 30 M3R1-07Q SPEC.NO. W443056 O/R NO.

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