Related Manuals for Memorex MT1125SM
Summary of Contents for Memorex MT1125SM
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Page 1: Service Manual
MT1125 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 SPECIFICATIONS ............................ COVER 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......................2. REMOVAL OF DEFLECTION YOKE ................... SERVICE MODE LIST ..........................CONFIRMATION OF USING HOURS....................... -
Page 4: General Specifications
G E N E R A L S P E C I F I C A T I O N S G-1.Outline of the Product inch( 626 mmV):Measured diagonally Color CRT 100 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... - Page 5 G E N E R A L S P E C I F I C A T I O N S G-17. P rotector: Power Fuse G-18.Regulation Safety NEMKO FEMKO DEMKO IEC65 SEMKO HOMOLO SABS SISIR AS3159 DENTORI GOST NONE Radiation SABA HOMOLO...
- Page 6 G E N E R A L S P E C I F I C A T I O N S G-26.OSD Language OSD Language Setting Not Applicable G-27.Speaker 1.5 x 2.7 inches Imp. ohm x Max 2.5 + 2.5 W (Typical) 10% 2.0 + 2.0 W (Typical) G-28.EXT Speaker G-29.Carton...
- Page 7 G E N E R A L S P E C I F I C A T I O N S G-32.Switch Front Power(Tact) Channel Up/Reset Volume Up/Set Up System Select Channel Down/Enter Volume Down/Set Down Main Power S W Sub Power Menu:Vol UP + Vol Down Rear...
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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 Of Deflection Yoke
DISASSEMBLY INSTRUCTIONS 4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 1-5. Support Fig. 1-5 Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts. 2. -
Page 10: Service Mode List
SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD. VOL. (-) MIN Initialization of the factory. VOL. (-) MIN NOTE: Do not use this for the normal servicing. POWER ON total hours is displayed on the screen. -
Page 11: Electrical Adjustments
ELECTRICAL ADJUSTMENTS 1. BEFORE MAKING ELECTRICAL 1. RF AGC DELAY ADJUSTMENTS 2. VIDEO LEVEL Read and perform these adjustments when repairing the 3. FM LEVEL circuits or replacing electrical parts or PCB assemblies. 4. OSD H 5. CUT OFF CAUTION 6. - Page 12 ELECTRICAL ADJUSTMENTS 2-5: SUB TINT/SUB COLOR 2-8: VERTICAL SIZE Receive the color bar pattern. Receive the crosshatch pattern. Connect the synchro scope to pin 1 of CP101 and the Using the remote control, set the brightness and pin 6 (GND) of CP101. contrast to normal position.
- Page 13 ELECTRICAL ADJUSTMENTS 2-11: VCO FREERUN Receive an 80dB monoscope pattern. Connect the digital voltmeter between the TP201 and the Ground. Adjust the L205 until the digital voltmeter is 3.1 0.05V. 2-12: SEPARATION 1, 2 Receive the stereo broadcasting signal. Connect the AC voltmeter to CP351 through stereo filter (L=400Hz, R=2KHz).
- Page 14 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 15: Major Components Location Guide
MAJOR COMPONENTS LOCATION GUIDE CP351 L205 TP201 TU001 FB401 VR401 CP101 FOCUS VOLUME SCREEN VOLUME MAIN D3-1... -
Page 16: Block Diagram
BLOCK DIAGRAM IC351 AN5277 SPEAKER SOUND CHROMA TU001 SPEAKER IC201 LA76814M-MPB AUDIO IF/RF AGC SOUND_R SOUND_L CH. DOWN DRIVE CF201 Q604, Q605 SAW FILTER VIDEO VIDEO MICON VIDEO VOL. DOWN BUFFER IC101 OEC3041A Q801 POWER TV MUTE RED OUT TONE CONTROL IC705 M62420SP RGB OUT Q803... -
Page 17: Printed Circuit Boards Main/Crt
PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CP803A C448 CP802A TP501 IC601 CP101 C434 R422 C626 IC501 C420 R509 R429_1 W023 C004 R001 D410 W823 R002 HS501 D001 W022 W818 C002 L704 C001 D408 R753 C403 C764 D404 FB401 D406 D401 W005... - Page 18 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R606 R645 R112 R636 R632 C612 C632 R646 R661 R647 R209 C645 R201 R202 C610 R618 C218 R208 C216 R203 C206 C207 R622 R357 R210 C647 R656 R204 R655 R624 R664 C648 R666 R218...
- Page 19 MICON/TUNER SCHEMATIC DIAGRAM ATC001 NXC0032-010010 TM101 R25-1088 TU001 ENV56D67G3 Vout R133 47 1/4W 5V REG. KIA78L05BP IC103 R136 SKHVBED010 SW101 R134 X-RAY SW CH UP Q103 2SC1815Y 12.5 FROM/TO SOUND SKHVBED010 25" SW102 C134 C103 R137 AUDIO_MUTE CH DOWN POWER SW Q104 I2C_SCL 0.1 TF...
- Page 20 CHROMA SCHEMATIC DIAGRAM VIDEO BUFFER VIDEO BUFFER Q605 Q604 2SA1015Y 2SA1015Y D609 R652 1SS133 L205 3602038 R624 R660 R662 C628 0.047 M TP201 C610 100P SL C218 3.3 2.2 0.001 Y C217 R208 0.47 CLMP CLMP X-RAY VIDEO R203 TRAP FILTER HOR GND VIDEO...
- Page 21 DEFLECTION/CRT SCHEMATIC DIAGRAM CD802 CP802B 51048-0510 FROM/TO CHROMA CP802A 51048-0510 122E053701 CLAMP CLAMP CLAMP CLAMP CLAMP G.OUT G.OUT G.OUT G.OUT G.OUT B.OUT B.OUT B.OUT B.OUT B.OUT R.OUT R.OUT R.OUT R.OUT R.OUT P.CON+5V V-OUT IC401 LA7841 THERMAL PUMP CD801_1 CP801_1 PROTECTION 8M82025A TS-80P-02-V1 AMP -...
- Page 22 POWER SCHEMATIC DIAGRAM CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE 6.3A 125V (F501) FUSE. ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES 6.3A 125V D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V (F501). DEGAUSS COIL CP502 L502...
- Page 23 SOUND SCHEMATIC DIAGRAM FROM MICON/TUNER I2C_SDA I2C_SCL AUDIO_MUTE L704 FROM CHROMA 22uH TU_AUDIO_OUT TP701 P.CON+9V TU_AUDIO_OUT R752 C775 1.8K 0.033 M C770 C777 0.022 0.47 1.8K TONE 136K AMP1 I2C BUS INTERFACE SIMAMP1 VOLAMP1 6.5K 6.5K 6.5K VOLAMP2 R729 C748 CONTROL SOUND_R SIMAMP2...
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Page 24: Micon/Tuner
WAVEFORMS MICON/TUNER 200mV 5ms/div 0.5V 20 s/div 1V 0.5ms/div 20V 20 s/div 0.5V 20 s/div 0.5V 20 s/div 0.5V 20 s/div 200mV 20 s/div 200mV 20 s/div 200mV 5ms/div 200mV 20 s/div 14 0.5V 5ms/div CHROMA 1V 20 s/div 0.5V 20 s/div 100mV 1ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. -
Page 25: Deflection/Crt
WAVEFORMS 50V 20 s/div 16 1V 20 s/div 200V 20 s/div SOUND 1V 20 s/div 0.5V 1ms/div 10V 5ms/div DEFLECTION/CRT 1V 1ms/div 18 0.5V 5ms/div 10V 5ms/div 20V 20 s/div 50V 20 s/div 200mV 1ms/div 200mV 1ms/div 2V 20 s/div 50V 20 s/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. - Page 26 WAVEFORMS 1V 1ms/div 1V 1ms/div 34 2V 1ms/div 2V 1ms/div...
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Page 27: Mechanical Exploded View
MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB ASS'Y) L502 ATC001 V801 TU001 PCB010 (MAIN PCB ASS'Y) SP351... -
Page 28: Mechanical Replacement Parts List
MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A3I002F720 CABINET,FRONT ASS'Y ---- HEAT SINK ---- HEAT SINK ---- METAL SPACER ---- COATING CLIP 741WUA0016 SPRING,EARTH 701APJ0066 CABINET,FRONT 713KPA0109 GUIDE,REMOCON 7230006856 SHEET,CAUTION 735WPA0426 BUTTON ASS'Y 702APA0086 CABINET,BACK 7222022470 SHEET,RATING 7230006851 FILM,DECORATION 7230006873 SHEET,BRAND 759WPA0006 HOLDER,ANODE WIRE 762WPA0007 HOLDER,CRT WIRE... -
Page 29: Electrical Replacement Parts List
ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R177 R5Y2CF122J R,CEMENT 1.2K OHM 10W D610 D1VT001330 DIODE,SILICON 1SS133T-77 ! R401 R4X5T4104F R,METAL 100K OHM 1/4W D611 D92T09R1B1 DIODE,ZENER RD9.1EB1 TA11R ! R404 R801R7272J 2.7K OHM 1/10W ! R405... - Page 30 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS FH501 06710T0006 HOLDER,FUSE EYF-52BC FH502 06710T0006 HOLDER,FUSE EYF-52BC ! K001 129A000010 WEDGE 8115529 ! K002 129A000010 WEDGE 8115529 ! K003 129A000010 WEDGE 8115529 MG801 026A062704 MAGNET,CONVERGENCE 29MMSTAR MS501 128B000018 SHEET 23MICA OS101 077Q014003 REMOTE RECEIVER...
- Page 31 M3I0-02F SPEC.NO. A953512 O/R NO.