Service Manual MT1191V 19” Color Television THIS SERVICE MANUAL IS FOR MT1191V SUFFIX A , B , C, D AND E CRT USAGE SUFFIX A SUFFIX B SUFFIX C SUFFIX D SUFFIX E V451 5721-015ST51N (51GGD95X) 5721-51CN020T (510UEB22DY) 5721-028TT48N (A48LRH93X (W)) 5721-029NT48N (A48LSD095X) 5721-031ZT48N (A48LGS30X) DY501 4993-118 4993-060 4993-122 4993-119 4993-123
FEATURES w On-screen graphics guide you through setup features and operations w Automatic programming of channels allows easy selection of stations available in your viewing w w w w w w w area Sleep timer programs the TV to turn itself off at a preset time One day timer programs the TV to come on once at a preset time Weekly timer programs the TV to come on at a preset time every day 26 button infrared remote control allows remote operation VHF/UHF/CATV tuning allows reception of standard broadcasts or cab
IMPORTANT SERVICE SAFETY INFORMATION Operation of receiver outside of cabinet or with back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. PROTECT YOUR CUSTOMER 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver.
( ADJUSTMENT BY REMOTE CONTROL ) ADJUSTMENT MODE The following adjustment items can be performed from menus by Remote Control as shown below : NOTE: The button combination and position on the Remote Control to select the adjustment items is given on page 4. 1. Press the SHIFT + ADJ. MODE buttons on the Remote Control simultaneously to bring up the adjustment mode menu screens shown below. 2. 3. From the menu screen, press the + or - button on the Remote Control to select the item to be adjusted.
REMOTE CONTROL LAYOUT VVIDEO IDEO -4 -
IC, TRANSISTOR AND CRT COMPLEMENT INTEGRATED CIRCUITS IC101 TA87C-B2 IC102 M24CO2B IC301 TA1268N IC311 NJ7809FA IC501 AN5512 IC601 STR30130 IC671 NJ7805LD Microcomputer EEPROM IF/Video/Chroma/Deflection Voltage Regulator Vertical Deflection Output AVR Voltage Regulator and Reset TRANSISTORS Q101 DTC143ZS Q102 2SC945(P) Q173 2SC945(P) Q301 2SC945(P) Q302 2SA733(P) Q303 2SC945(P) Q351 DTC143ZS Q451 2SC1573A(R) Q452 2SC1573A(R) Q453 2SC1573A(R) Q551 2SC1473A(R) Q552 2SD1877 Q601 2SC945(P) Q801 2SC945(P) Q802
INSTALLATION AND SERVICE INSTRUCTION CAUTION: Use an isolation transformer when performing any service on this chassis. SHUTDOWN CIRCUIT: When the high voltage rises, there are simultaneous voltage increase developed at terminal 6 of the Horizontal Output Transformer ( T671 ) and applied to pin 29 of IC301.
SOUND IF ADJUSTMENT 1. Connect TV Test Pattern Generator (NTSC signal, 70dB u, channel 2) to EXT. Antenna Terminal (TE1) through TV Channel Signal Generator. (Standard modulation is 400Hz at 25kHz deviation for sound signal. 2. Connect positive lead of DC Digital Voltmeter to TP7 and negative lead to TP4. 3. Adjust T203 so that the DC Digital Voltmeter reading is 4.0V. COLOR PURITY ADJUSTMENT For best results, it is recommended that the purity adjustment be made in the final receiver location.
STATIC CONVERGENCE ADJUSTMENT ( Refer to Figure 3 and 4 ) IMPORTANT: Before proceeding, make sure the location of the convergence magnet assembly on the neck of the CRT is as shown in Figure 3. The rear edge of this assembly must be positioned 65 mm from the tip of the CRT base. If not properly positioned, convergence adjustment may be difficult, if not impossible. 1. Apply dot or crosshatch pattern from Dot/Bar Generator to receiver.
GREEN RED BLUE GREEN BLUE RED WEDGE B RED GREEN BLUE WEDGE C RED GREEN BLUE WEDGE A DEFLECTION YOKE REAR VIEW (A) GREEN BLUE RED BLUE GREEN RED RED BLUE GREEN WEDGE A DEFLECTION YOKE REAR VIEW (C) GREEN RED BLUE WEDGE B WEDGE B BLUE GREEN RED WEDGE C BLUE GREEN RED RED GREEN BLUE (B) DEFLECTION YOKE REAR VIEW BLUE RED GREEN (D) WEDGE A DEFLECTION YOKE REAR VIEW Fig.
HORIZONTAL PHASE ADJUSTMENT 1. Connect TV Test pattern Generator (NTSC signal 70dB u, Monoscope Pattern) to Antenna T erminal (TE) through TV Channel Generator. (NOTE: For steps 2, 3 and 4 below, refer to page 3 for Adjustment By Remote Control Method). 2. Go to Adjustment Mode (2) by remote control. 3. Select H. PHASE from Adjustment Mode (2) menu screen. 4. Adjust H. PHASE level (by using + or - button on remote control) so that horizontal reading of test pattern becomes the same value.
TEST POINT - 11 -
VOLTAGE CHART ( all in volts ) OPERATION CONDITION : IC101 IC102 IC301 IC311 IC501 IC601 IC671 Q101 Q102 Q173 Q301 Q302 Q303 Q351 Q451 Q452 TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt B Volt 1.5 -0.8 -0.1 4.0 1.5 1.7 0.0 2.3 2.2 1 0.0 11 0.0 21 4.9 31 2.1 41 0.7 1 0.0 1 0.
CHASSIS WAVEFORM WF-1 1.0Vp-p(H) WF-2 9.7Vp-p(H) WF-3 47.2Vp-p(V) WF-4 1.7Vp-p(V) WF-5 27.4Vp-p(H) WF-6 24.4Vp-p(H) WF-8 202Vp-p(H) WF-9 0.75Vp-p(H) WF-7 25.
WIRING DIAGRAM - 14 -
SCHEMATIC DIAGRAM PCB2 CRT C130 100p 31 30 C556 10 /50V R555 15k 32 CONTRAST TINT C451 680p B C455 1000p /500V D681 1F4-E 26 R192 1k 27 28 3 9V 1 2 IN Q551 2SC1473A (R) R558 330 D607 1SS133 IC311 NJ7809FA VOLTAGE REGULATOR R559 330 WF-9 C557 680p /500V D559 RD9R1ES2 C553 0.01 ZF C554 100 /16V Q552 2SD1877 ! R804 10k ! TE 1 C803 2200p R802 10k D802 1SS133 Q801 2SC945 (P) R810 2.2 C805 0.1 C682 2200 /6.3V 6 C681 0.
P.C. BOARDS PCB-1 MAIN P.C. BOARD PCB-2 CRT SOCKET P.C.
EXPLODED VIEW 142 158 - 16 -
Ref No. Part No. Description Ref No. GENERAL UNIT PARTS LIST Part No.
Ref No. Part No. Description Ref No. CAPACITORS Part No. Description CAPACITORS C315 5342-S06FM225 2.2 uF +-20% 50V Electrolytic NP C604 5361-S40FM103 0.01 uF +-20% 250V Cetamic F C317 V5369-S04FZ103 0.01 uF +80%-20% 25V Semiconductor C605 5361-S40FM103 0.01 uF +-20% 250V Cetamic F C318 5345-476-16 47 uF +-20% 16V Electrolytic C606 5361-S09VZ103 0.
Ref No. Part No. Description Ref No. RESISTORS Part No. Description RESISTORS R124 5134-562J25P 5.6 k ohm +-5% 1/4W Carbon R335 5232-124J16P 120 k ohm +-5% 1/6W Carbon R126 V5133-R010J223 22 k ohm +-5% 1/8W Carbon R336 V5133-R010J222 2.2 k ohm +-5% 1/8W Carbon R127 5134-274J25P 270 k ohm +-5% 1/4W Carbon R340 V5133-R010J105 1 M ohm +-5% 1/8W Carbon R128 5232-222J16P 2.
Ref No. Part No. Description Ref No. RESISTORS Part No. Description INTEGRATED CIRCUITS R603 5277-271591 270 ohm 15W Cement IC101 5654-TA87C-B2 IC;(u-COM) R604 5171-S071J123 12 k ohm +-5% 1W Metal IC102 5654-M24C02B IC;(EEPROM) R605 5134-334J25P 330 k ohm +-5% 1/4W Carbon IC301 5653-TA1268N IC, TA1268N ;(IF/VIDEO/CHROMA/DEF) R606 5102-S101J470 47 ohm +-5% 1/4W Fuse IC311 5653-NJ7809FA IC, NJM7809FA;(9V REGULATOR) R607 V5133-R010J472 4.
Ref No. Part No. Description Ref No. COILS AND TRANSFORMERS Part No. Description PCB-2 CRT SOCKET P.C.BOARD(D551-19V1114B) CAPACITORS L552 5995-540084 Coil;(LINEARITY) L602 5583-52301 Coil AF CH;(LINE FILTER) T202 5932-12502 Coil;(AFT) C451 5361-681KB 680 pF +-10% 50V Ceramic B T203 5562-0019 Transformer SIF Det.
