Memorex MT1194, Service Manual

Page 1: ...SERVICE MANUAL MT1194 Design and specifications are subject to change without notice COLOR TELEVISION RECEIVER ORIGINAL MFR S VERSION A ...

Page 2: ...t which is replaced should be used the part which has the same character Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark the designated parts must be used PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING 4 There are parts which use the insulation material such as a tube or tape for safety or which are ...

Page 3: ...L SPECIFICATIONS DISASSEMBLY INSTRUCTIONS 1 REMOVAL OF ANODE CAP 2 REMOVAL AND INSTALLATION OF FLAT PACKAGE IC SERVICE MODE LIST CONFIRMATION OF HOURS USED WHEN REPLACING EEPROM MEMORY IC ELECTRICAL ADJUSTMENTS BLOCK DIAGRAM PRINTED CIRCUIT BOARDS MAIN CRT SCHEMATIC DIAGRAMS MICON CHROMA TUNER TV POWER DEFLECTION CRT SOUND AV WAVEFORMS MECHANICAL EXPLODED VIEW MECHANICAL REPLACEMENT PARTS LIST ELE...

Page 4: ...C 120V AC 60Hz DC Power Consumption at AC 73 W at AC 120 V 60 Hz Stand by at AC 5 W at AC 120 V 60 Hz Per Year kWh Year Protector Power Fuse Yes Safety Circuit Yes IC Protector Micro Fuse No G 4 Regulation Safety UL Radiation FCC X Radiation DHHS G 5 Temperature Operation 5o C 40o C Storage 20o C 60o C G 6 Operating Humidity Less than 80 RH G 7 On Screen Menu Yes Display Menu Type Character Pictur...

Page 5: ...27 Keys Keys Power Yes 1 Yes 2 Yes 3 Yes 4 Yes 5 Yes 6 Yes 7 Yes 8 Yes 9 Yes 0 Yes 100 No CH Up Yes CH Down Yes Volume Up Yes Volume Down Yes TV Caption Text Yes CH1 CH2 Yes TV Video TV AV Yes CH RTN CH ENT Quick View Yes Sleep Yes RE Call Call Yes Reset Yes Menu Yes Enter Yes Mute Yes Exit No MTS Audio Select No Set Yes Set Yes Multi Brand Keys CH Up VCR No CH Down VCR No Pause Still No TV VCR VC...

Page 6: ...tery No UM size x pcs OEM Brand No AC Cord No AV Cord 2Pin 1Pin No Registration Card No PTB Sheet No 300 ohm to 75 ohm Antenna Adapter No G 13 Interface Switch Front Power Yes System Select No Main Power SW No Sub Power No Channel Up Reset Yes Channel Down Enter Yes Volume Up Set Up Yes Volume Down Set Down Yes MENU Volume Up Volume Down Yes Rear AC DC No TV CATV Selector No Degauss No Main Power ...

Page 7: ...ions W x D x H mm 546 x 526 x 472 Design As per Buyer s Description of Origin Yes Drop Test Natural Dropping At 1 Corner 3 Edges 6 Surfaces Height cm 46 Container Stuffing 436 Sets 40 container G 17 Cabinet Material Cabinet Cabinet Front PS 94V0 DECABROM Cabinet Rear PS 94V0 DECABROM PCB Non Halogen Demand No Eyelet Demand No G 18 Environment Pb Free Lead free Solder No Other No Cd Free No A3 4 ...

Page 8: ...ip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 1 2 2 GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT Support Fig 1 2 3 After one side is removed pull in the opposite direction to remove the other NOTE Take care not to damage the Rubber Cap INSTALLATION 1 Clean the spot where the cap was located wit...

Page 9: ...using a blower type IC desoldering machine Refer to Fig 2 2 2 Fig 2 2 NOTE Do not add the rotating and the back and forth directions force on the IC until IC can move back and forth easily after desoldering the IC leads completely When IC starts moving back and forth easily after desoldering completely pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering...

Page 10: ...2 8 Thin tip Soldering Iron NOTE When the IC leads are bent during soldering and or repairing do not repair the bending of leads If the bending of leads are repaired the pattern may be damaged So be always sure to replace the IC in this case Finally confirm the soldering status on four sides of the IC using a magnifying glass Confirm that no abnormality is found on the soldering position and insta...

Page 11: ...MEMORY IC Refer to the WHEN REPLACING EEPROM MEMORY IC VOL MIN 8 Writing of EEPROM initial data NOTE Do not use this for the normal servicing VOL MIN Display of the Adjustment MENU on the screen Refer to the ELECTRICAL ADJUSTMENT On Screen Display Adjustment 9 CONFIRMATION OF HOURS USED POWER ON total hours can be checked on the screen Total hours are displayed in 16 system of notation NOTE If you...

Page 12: ...d should blink Using the VOL button on the remote step through the ADDRESS until required ADDRESS to be changed is reached Press ENTER to select DATA When DATA is selected it will blink Again step through the DATA using VOL button until required DATA value has been selected Pressing ENTER will take you back to ADDRESS for further selection if necessary Repeat steps 3 to 6 until all data has been c...

Page 13: ... Refer to Fig 2 1 Connect the oscilloscope to TP022 Activate the adjustment mode display of Fig 1 1 and press the channel button 19 on the remote control to select COL CENT Press the VOL UP DOWN button on the remote control until the red color level is adjusted to 110 10 of the white level Refer to Fig 2 2 Receive the color bar pattern Audio Video Input Press the TV AV button on the remote control...

Page 14: ...ontrol to select V SIZE Press the VOL UP DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes 10 2 Receive a broadcast and check if the picture is normal NOTE Adjust after performing adjustments in section 2 5 2 7 VERTICAL SHIFT 1 2 3 Receive the crosshatch signal from the Pattern Generator Activate the adjustment mode display of Fig 1 1 and pr...

Page 15: ...h the color bar generator from the green raster pattern to the crosshatch pattern Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets Combine red blue magenta and green by adjusting the pair of 6 pole magnets Adjust the crosshatch pattern to change to white by repeating steps 6 and 7 Turn the unit on and let it warm up for at l...

Page 16: ... PARTS LOCATION GUIDE WIRING CONNECTION CP803A CP802A TU001 S501A S501B FB401 CD501 AC IC CP401 C P 8 0 2 B CP806 CD803 CRT PCB MAIN PCB C R T CD101A CD101B SPEAKER CD802 R 8 0 7 R 8 0 3 J 8 0 1 TP023 TP022 CP801 CRT CD801 CP803B CRT CP502 L503 D 4 ...

Page 17: ...C401 LA78040N E VCC RGB Proc 1 RGB MATRIX COLOR CONT 38 37 26 27 57 58 16 Hor Proc SYNC SEPA Hor VCO Hor COUNT DOWN AFC 1 H COINCIDENT AFC 2 H PHASE 1 2 DY 3 1 4 2 L501 AC IN F501 Q507 FEED BACK T502 4 8 13 FEED BACK SW Q502 BUFFER 6 L503 DEGAUSS COIL 6 5 MEMORY IC IC199 S 24C02BFJ TB SDA SCL VOL DOWN CH DOWN VOL UP CH UP X601 3 579545MHz TU001 10 13 11 12 17 OS101 1 16 Q505 MICON CHROMA IC IC101 ...

Page 18: ...B TP023 TP022 C801 W048 W046 W032 W030 R123 W016 R423 C502 C503 R806 R802 SW105 W069 R143 W816 R427 Q401 R501 W004 W049 W019 W847 W848 D515 W803 R447 C410 W025 C511 R130 R106 R105 R116 R119 W067 W001 R522 W042 D507 R502 D521 C509 C435 C406 W064 D404 D408 D411 W003 W008 W056 R601 R604 X601 R403 R508 R415 D501 D502 D503 D504 CP801_2 OS101 CP803B CP803A L801 W801 CD101A CD101B C443 C515 C624 D510 L50...

Page 19: ... R108 R129 R813 R809 R816 R814 R815 R811 R701 R405 R418 R003 R507 C639 C620 C1001 C607 C608 C1009 C001 R602 C603 R103 C611 R104 R120 C602 C105 C107 R102 C104 C108 R606 C622 C605 C113 IC199 C004 C615 C616 R1008 C629_1 C627_1 C604_1 C626_1 C007_1 C407_1 C609_1 C513_2 C808_2 C810_2 C809_2 C641 PRINTED CIRCUIT BOARDS MAIN CRT CHIP MOUNTED PARTS SOLDER SIDE F 3 F 4 ...

Page 20: ...79545MHz CP601 173979 6 1 2 3 4 5 6 L001 3 3uH 0305 TU001 ENG36A01GY 1 10 11 12 13 14 15 16 17 18 19 2 20 21 3 4 5 6 7 8 9 GND B Vout OS101 KSM 713SY 1 2 3 P CON 5V P CON 5V H_OUT H_CTL ABCL B OUT CLAMP H_CTL G OUT R OUT H_SYNC V_OUT GND V_FEEDBACK AT 5V ABCL H_OUT P CON 5V X RAY SDA R OUT G OUT SCL B OUT H_SYNC AFT UNREG 12V KEY1 V_OUT POWER_FAIL KEY2 V_FEEDBACK UNREG 12V POWER_ON GND B REMOCON A...

Page 21: ...14_1 820P 2KV RR C502 0 001 500V B C508_1 0 0022 250V KY C517 820P 2KV RR C501 0 0082 B C509 0 047 TF C510_1 0 039 TF C511 1 50V KA C526_1 220 200V YK R503 100 1 4W R522 1 2M 1 2W R511_1 1 2M 1 2W R515 120K 1 2W R520 12K 1 4W R504 100 1 4W R528 6 8K 1 4W R538 1 5M 1 2W R500 2 7M 1 2W 10 R506 2 7K 1 4W R513 2 2K 1 4W R512 680 1 4W R507 27 R519 1K 1 4W R505 1K 1 4W R502 1K 1 4W R509 220 1 4W R508 22...

Page 22: ...00 1 4W R802 2 7K 1 4W R403 22K 1 4W R427 100 1 4W R416 1 1 2W R806 2 7K 1 4W R424 6 8K 1 4W R445 150K 1 4W R405 1K R809 4 7K R811 4 7K R813 330 R814 4 7K R815 330 R816 330 R448 680 1 2W R449 680 1 2W OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURI...

Page 23: ... R1008 39K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE LES PIECES REPAREES PAR UN ETANT ATTENTION SINCE THESE PARTS MARKED BY CAUTION DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY USE ONES ARE W807 W803 W851 IC1001 AN7511 SOUND AMP IC 1 2 ...

Page 24: ...esponding balloon number in the schematic diagram MICON CHROMA TUNER 1 0 5V 2ms div 200V 20µs div 11 1V 20µs div 7 2 20V 20µs div DEFLECTION CRT 10V 5ms div 12 3 200mV 20µs div 8 0 5V 5ms div 10V 5ms div 13 0 5V 5ms div 4 9 20V 20µs div 50V 20µs div 14 10 2V 20µs div 5 1V 20µs div 15 50V 20µs div ...

Page 25: ...H 2 16 50V 20µs div NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram SOUND AV 0 5V 1ms div 17 1V 1ms div 18 200mV 500µs div 19 20 500mV 20µs div ...

Page 26: ...AL EXPLODED VIEW I 1 PCB010 MAIN PCB ASS Y TU001 FB401 205 204 203 103 206 206 202 L503 V801 J801 PCB110 CRT PCB ASS Y 106 102 104 201 201 201 201 206 105 107 101B 203 101A SP1001 101 101D 101C 203 203 203 103 ...

Page 27: ...WUA0019 SPRING EARTH 106 8994201000 HOLDER CRT WIRE 107 899HV3T000 HOLDER ANODE WIRE 108 800WQ0A024 FELT SHEET 5x80 T 0 5 201 8117540A64 SCREW TAPPING B0 TRUSS 4x16 202 8109I30804 SCREW TAP TITE B WH7 3x8 203 8110630A04 SCREW TAP TITE P BRAZIER 3x10 204 8107630804 SCREW TAP TITE S BRAZIER 3x8 205 8109I30604 SCREW TAP TITE B WH7 3x6 206 8121F50B84 SCREW TAP TITE P FAI20 FLAT 5x28 A3R006V975 INSTRUC...

Page 28: ... 1 25KV PHE COILS TRANSFORMERS C446 E02LU5220M CE 22 UF 50V L001 02167F3R3J COIL 3 3 UH C503 C0JTB0513K CC 0 001 UF 500V B L101 02167F3R3J COIL 3 3 UH C505 P2122B334M CMP 0 33 UF 275V ECQUL L501 029X000417 COIL LINE FILTER SS11V 10062 CH C506 CC3LE0ML3M CC 0 0033UF 250V L503 028R200031 COIL DEGAUSS 8R200031 C508 CC3LE0MH3M CC 0 0022UF 250V L801 021673101K COIL 100 UH C514 C0PLRR7W2K CC 820 PF 2KV ...

Page 29: ...TM101 076N0DW110 TRANSMITTER RC DW110 TU001 0163100011 RF UNIT ENG36A01GY or 0163300005 RF UNIT 115 V K015AR_B V801 098Q200490 CRT W DY A48AKH13X04 X601 100BT3R537 CRYSTAL HC 49U RESISTOR RC CARBON RESISTOR CAPACITORS CC CERAMIC CAPACITOR CE ALUMI ELECTROLYTIC CAPACITOR CP POLYESTER CAPACITOR CPP POLYPROPYLENE CAPACITOR CPL PLASTIC CAPACITOR CMP METAL POLYESTER CAPACITOR CMPL METAL PLASTIC CAPACIT...

Page 30: ...M3R1 07Q O R NO SPEC NO W443056 ...