Related Manuals for Memorex MT1120S
Summary of Contents for Memorex MT1120S
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Page 1: Service Manual
MT1120S SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR’S VERSION E Design and specifications are subject to change without notice. - Page 2 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R111 R114 R605 Q701 C129 C607 R624 R602 C652 R601 Q702 R638 R652 R642 IC101 W843 C616 C634 R621 IC601 R105 C626 C651_1 C618 R629 R622 C650 R644 Q610 W808 W814 R853 W159 Q352...
- Page 3 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) TU001 ENV56D66G3 ACCESSORY TP001 JWF-50K-1 TM101 RC-DW040 FROM/TO CHROMA C003 TUNER+5V R001_1 33K 2W SYNC I2C_OFF Y_VIDEO MICON IC IC101 OEC7044C R123 4.7K OSD_R P50/H.SYNC RED R R122 4.7K P51/V.SYNC GREEN G OSD_G R109 R121 4.7K P00/EXT MUTE BLUE B...
- Page 4 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) R645 FROM TV POWER AT+10V Q604 Q605 Q601 2SD734 2SD734 2SD734 C655 0.22 11.3 Q606 2SD734 CF604 R647 BUFFER TPS4.5MB R639 Q603 2SD734 CC003 FROM/TO AV Y_VIDEO R615 C647_1 0.01 B CF603 VIDEO_IN SFSH4.5MCB VIDEO R638 D607 C661...
- Page 5 DEFLECTION/CRT SCHEMATIC DIAGRAM CP802A CP802B (MAIN PCB) 51048-1000 51048-1000 FROM CHROMA S801 CLAMP CLAMP CLAMP G.OUT G.OUT G.OUT R.OUT R.OUT R.OUT B.OUT B.OUT B.OUT V-OUT IC IC401 LA78040 FBT+8V HEATER HEATER THERMAL PUMP PROTECTION TO SOUND AMP 180V 180V +12V CD801 8M82025A W810...
- Page 6 TV POWER SCHEMATIC DIAGRAM (MAIN PCB) 5A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH THE SAME TYPE 5A 125V (F501) ATTENTION: POUR LINE PROTECTION CONTINUE LES RISQUES R517_1 D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME C516 TYPE 5A 125V (F501) 500V 470P...
- Page 7 SOUND AMP SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO MICON/TUNER REGULATOR 9V IC IC853 KIA78L09BP-AT AUDIO_MUTE 11.7 R864 C881 1.8K 0.033 B C879 C883 R859 BUFFER 0.022 0.47 4.7K Q851 2SA1037AK 1.8K TONE 136K AMP1 I2C BUS INTERFACE BUFFER SIMAMP1 VOLAMP1 6.5K Q852 6.5K 6.5K...
- Page 8 AV SCHEMATIC DIAGRAM (MAIN PCB) FROM STEREO JACK FROM/TO SOUND AMP CP701B 8283_0812_00_000 C702 R727 A_IN_R A_IN_R FRONT_AUDIO_R C701 R729 A_IN_L FRONT_AUDIO_L A_IN_L FRONT_VIDEO_IN FRONT_VIDEO_IN REAR_AUDIO_R REAR_AUDIO_L AUDIO_OUT_R TO STEREO JACK AUDIO_OUT_L CP703B W808 8283_0512_00_000 L-OUT L+OUT SOUND_OUT_L R-OUT R+OUT SOUND_OUT_R P.CON+5V W814...
- Page 9 STEREO JACK SCHEMATIC DIAGRAM (STEREO JACK PCB) PCB280 TO AV TE9977 F_A/V_IN(STEREO) CD701 J702_1 CH28110A JPJ3653-01-234 A_IN_R A_IN_R A_IN_L A_IN_R A_IN_L A_IN_L V_IN V_IN V_IN SPEAKER CD353 8 OHM 2.5W CH14061A SP354_1 MS-2D6SB02 SPEAKER 8 OHM 2.5W SP355_1 MS-2D6SB02 W860 FROM AV CD352 CH25088A...
- Page 10 WAVEFORMS MICON/TUNER 200mV 20µs/div 12 1V 20µs/div 200mV 5ms/div 1V 20µs/div 20V 20µs/div 0.5V 20µs/div DEFLECTION/CRT 3 200mV 20µs/div 9 200mV 20µs/div 14 0.5V 5ms/div 200mV 5ms/div 0.5V 5ms/div 15 20V 20µs/div CHROMA 11 1V 20µs/div 16 2V 20µs/div 6 0.5V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
- Page 11 WAVEFORMS 200V 20µs/div 22 50V 20µs/div SOUND AMP 25 200mV 1ms/div 10V 5ms/div 26 200mV 1ms/div 10V 5ms/div 50V 20µs/div 0.5V 1ms/div 21 50V 20µs/div 1V 1ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
- Page 12 MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 FB101 V801 TU001 PCB010 (MAIN PCB) SP354 SP355 PCB280 (STEREO JACK PCB)
- Page 13 MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A3G853J720 CABINET,FRONT ASS'Y 701WPJB240 CABINET,FRONT 711WPAA065 PLATE,DISPLAY 713WPAA010 GUIDE,REMOCON 735WPBA220 BUTTON,CHANNEL 735WPAA279 BUTTON,BASE 800WR0A003 SHEET,CRT SUPPORT 741WUA0001 SPRING,EARTH 7220001107 SHEET,HWC 7220001119 SHEET,CSA WARNING 723000A900 FILM,DECORATION 726000A014 SHEET,CRT SERVICEMAN 8995034000 CORD CLIP UL CO. 702WPAA129 CABINET,BACK 722A08A081 SHEET,RATING 769WSAA003 WASHER...
- Page 14 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R001 R3X18A333J R,METAL OXIDE 33K OHM 2W D508 D1VT001330 DIODE,SILICON 1SS133T-77 ! R401 R4X5T4104F R,METAL 100K OHM 1/4W ! D509 D97U01801B DIODE,ZENER MTZJ18B T-77 ! R404 R3X181102J R,METAL OXIDE OHM 1W...
- Page 15 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION COILS &TRANSFORMERS T401 03305Y0018 TRANS,HORIZONTAL DRIVE 305Y001 ! T502 0481290604 TRANSFORMER,SWITCHING 8129060 J A C K S J702 0602431015 RCA,JACK JPJ3653-01-234 J703 060Q431018 RCA,JACK AV3-19DS-1 J704 060Q431018 RCA,JACK AV3-19DS-1 ! J801 066X120014 SOCKET,CRT HPS3200-010501...
- Page 16 SPEC.NO. M3G8-53J O/R NO. W143007...
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Page 17: 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 18: 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 ....................... SERVICE MODE LIST ..........................CONFIRMATION OF USING HOURS ......................NOTE FOR THE REPLACING OF MEMORY IC ..................ELECTRICAL ADJUSTMENTS ........................ -
Page 19: General Specifications
GENERAL SPECIFICATIONS G-1.Outline of the Product inch(508.0mmV):Measured diagonally Color CRT 90 degree deflection G-2.Broadcasting System 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 Contactless Electric tuner 1Tuner System 2Tuner System channel Tuner... - Page 20 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 21 GENERAL SPECIFICATIONS G-26.OSD Language OSD Language Setting Not Applicable G-27.Speaker P o s itio n Front Side Bottom Size 6 1/3 x 2 1/4 inches Imp. ohm x Power 2.5 + 2.5 W 2.0 + 2.0 W (Typical) G-28.EXT Speaker : G-29.Carton Master Carton: Need...
- Page 22 GENERAL SPECIFICATIONS G-32.Switch Front Power(Tact) Channel Up/Reset Volume Up/Set Up System Select Channel Down/Enter Volume Down/Set Down Main Power SW Sub Power Menu:Vol UP+Vol Down Rear AC/DC TV/CATV Selector Degauss Main Power SW G-33.Magnetic Field BV : +0.45G BV : +0.35G BV : +0.25G...
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Page 23: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP 3. After one side is removed, pull in the opposite direction to 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 24: 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 25: Electrical Adjustments
ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: RF AGC DELAY Read and perform these adjustments when repairing the Place the set with Aging Test for more than 15 minutes. circuits or replacing electrical parts or PCB assemblies. Receive an 65dB monoscope pattern. - Page 26 ELECTRICAL ADJUSTMENTS 2-9: 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) Fig. 2-1 00 OSD 110% Fig.
- Page 27 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.
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Page 28: Major Components Location Guide
MAJOR COMPONENTS LOCATION GUIDE VR501 CP601 TU001 FB401 TP001 FOCUS VOLUME SCREEN VOLUME MAIN PCB TP023 TP022 J801 CRT PCB D3-1... -
Page 29: Block Diagram
BLOCK DIAGRAM TONE CONTROL IC SOUND AMP IC REGULATOR 9V IC IC854 M62420SP IC853 KIA78L09BP-AT IC852 AN5829S Q352 +12V 22 21 18 19 9 10 2 19 MUTE SW. Q351 MUTE SW. Q705 Q707 Q852 Q851 IC351 LA4600 IF/CHROMA AUDIO IC TU001 MUTE MUTE... -
Page 30: Printed Circuit Boards
PRINTED CIRCUIT BOARDS STEREO JACK MAIN/CRT (INSERTED PARTS) SOLDER SIDE SOLDER SIDE D605 CD701 D402 CD352 CD353 R424 W096 C406 D411 R403_1 W861 C435 C404 J702_1 C003 R421 C870 C722 R429_1 TP001 C720_1 D705 D410 C448 C712_1 D708 D406 C726 D703 IC853 C002...