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Service Manual
MT1190C
19" Color Television
THIS SERVICE MANUAL IS FOR MT1190C SUFFIX A , B ,
C, D AND E CRT USAGE
SUFFIX A
V451
5721- 015ST51N
(51GGD95X)
DY501
4993-118
SUFFIX B
SUFFIX C
5721- 51CN020T
5721-028TT48N
(510UEB22DY)
(A48LRH93X (W))
4993-060
4993-126
SUFFIX D
SUFFIX E
5721- 029NT48N
5721- 031ZT48N
(A48LSD095X)
(A48LGS30X)
4993-119
4993-123
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Table of Contents
Related Manuals for Memorex MT1190C
Summary of Contents for Memorex MT1190C
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Page 1: Service Manual
Service Manual MT1190C 19” Color Television THIS SERVICE MANUAL IS FOR MT1190C SUFFIX A , B , C, D AND E CRT USAGE SUFFIX A SUFFIX B SUFFIX C SUFFIX D SUFFIX E V451 5721- 015ST51N 5721- 51CN020T 5721-028TT48N 5721- 029NT48N... -
Page 2: Specifications
FEATURES On-screen graphics guide you through setup features and operations Automatic programming of channels allows easy selection of stations available in your viewing 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 cable TV channels... -
Page 3: Important Service Safety Information
IMPORTANT SERVICE SAFETY INFORMATION Operation of receiver outside of cabinet or with back removed involves PROTECT YOUR CUSTOMER a shock hazard. Work on these models should only be performed by 1. Inspect all lead dress to make certain that leads are not pinched those who are thoroughly familiar with precautions necessary when or that hardware is not lodged between the chassis and other working on high voltage equipment. -
Page 4: Adjustment Mode
( 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. -
Page 5: Remote Control Layout
REMOTE CONTROL LAYOUT VIDEO VIDEO VIDEO METHOD OF RECALL V-BLOCK PASS NUMBER If user forgets the V-Block Pass Number, call recall by the Service Remote Control or User Remote Control. 1. If use the Service Remote Control, at the Pass Number entry menu, while holding down [SHIFT] button and press the [Q.REV] button repeatedly four times. - Page 6 IC, TRANSISTOR AND CRT COMPLEMENT INTEGRATED CIRCUITS IC101 TA87C-B6 Microcomputer IC601 STR30130 IC102 CAT24C04 EEPROM IC671 NJ7805LD Voltage Regulator and Reset IC301 TA1268N IF/Video/Chroma/Deflection IC701 TLP651 Photo-Coupler IC311 NJ7809FA Voltage Regulator IC702 TLP631 Photo-Coupler IC501 AN5512 Vertical Deflection Output TRANSISTORS Q101 DTC143ZS Vertical Synchronizing Q551 2SC1473A(R)
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Page 7: Sub Tint Adjustment
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 termi- nal 5 of the Horizontal Output Transformer (T671) and applied to pin 29 of IC301. If excessive high voltage is produced, the increased voltage developed exceeds the rating of zener diode D552 causing the Horizontal Oscil- lator to stop functioning and the high voltage system to shut down. -
Page 8: Color Purity Adjustment
SOUND IF ADJUSTMENT 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. Connect positive lead of DC Digital Voltmeter to TP7 and negative lead to TP4. Adjust T203 so that the DC Digital Voltmeter reading is 4.0V. - Page 9 STATIC CONVERGENCE ADJUSTMENT (Refer to Fig. 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 Fig. 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.
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Page 10: Focus Adjustment
GREEN GREEN WEDGE B BLUE BLUE GREEN BLUE WEDGE C GREEN BLUE WEDGE A BLUE GREEN WEDGE A DEFLECTION YOKE REAR VIEW DEFLECTION YOKE REAR VIEW BLUE GREEN GREEN GREEN WEDGE B WEDGE B BLUE BLUE BLUE GREEN WEDGE C BLUE GREEN GREEN... - Page 11 HORIZONTAL PHASE ADJUSTMENT Connect TV Test pattern Generator (NTSC signal 70dB u, Monoscope Pattern) to EXT. Antenna Terminal (TE1) through TV Channel Generator. (NOTE: For steps 2, 3 and 4 below, refer to page 3 for Adjustment By Remote Control Method). Go to Adjustment Mode (2) by remote control.
- Page 12 VIDEO IN ADJUSTMENT Connect Pattern Generator (1Vp-p, Color Bar Pattern) to video jack (J701). Connect positive lead of Oscilloscope probe 1 to R703 and negative lead of Oscilloscope to TP4 to detect video in signal. Connect positive lead of Oscilloscope probe 2 to TP10 and negative lead of Oscilloscope to TP4. Select Video Mode by remote control.
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Page 13: Test Point
TEST POINT - 12 -... -
Page 14: Operation Condition
VOLTAGE CHART (all in volts) OPERATION CONDITION: TINT, BRIGHT and COLOR CONTROL ......CENTER CONTRAST ..............MAXIMUM COLOR BAR SIGNAL IC101 TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt TERMINAL No Volt IC102 TERMINAL No Volt IC301 TERMINAL No Volt... - Page 15 CHASSIS WAVEFORM WF-1 1.0Vp-p(H) WF-2 9.7Vp-p(H) WF-3 50.0Vp-p(V) WF-4 2.4Vp-p(V) WF-5 27.4Vp-p(H) WF-6 21.0Vp-p(H) WF-7 27.0Vp-p(V) WF-8 195.0Vp-p(H) WF-9 0.75Vp-p(H) NOTES: WAVEFORMS SHOWN WERE PRODUCED USING A PATTERN GENERETOR WITH ITS CONTROL SET TO PRODUCE A COLOR BAR SIGNAL AND A WIDEBAND OSCILLOSCOPE WITH LOW CAPACITY PROBE TO PREVENT LOADING.
- Page 16 WIRING DIAGRAM - 15 -...
- Page 17 EXPLODED VIEW - 16 -...
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Page 18: Schematic Diagram
SCHEMATIC DIAGRAM UHF/VHF 75ohm - 17 -... - Page 19 P.C.BOARDS NOTE PCB-1 MAIN P.C.BOARD X X X X MT1190C & MT1192-04 PCB-2 CRT SOCKET P.C.BOARD - 18 -...
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Page 20: General Unit Parts List
Ref No. Part No. Description Ref No. Part No. Description GENERAL UNIT PARTS LIST MISCELLANEOUS 1532-26001 Window DY501 4993-119 Coil Deflection Yoke SUFFIX D 1662-79801 Push Button DY501 4993-123 Coil Deflection Yoke SUFFIX E 2132-412 Wedge Deflection Yoke;SPACER(x3) LCN801 4163-06038003 Connector with Lead Wire;(SP) 2133-334 Protector;BUTTON... - Page 21 Ref No. Part No. Description Ref No. Part No. Description CAPACITORS CAPACITORS C208 5345-474-50 0.47 uF +-20% 50V Electrolytic C504 V5361-S17BK471 470 pF +-10% 50V Ceramic B C209 5345-476-16 47 uF +-20% 16V Electrolytic C505 5354-104593 0.1 uF +-5% 50V TF C210 V5369-S04FZ103 0.01 uF +80%-20% 25V Semiconductor...
- Page 22 Ref No. Part No. Description Ref No. Part No. Description CAPACITORS RESISTORS C675 5345-108-35 1000 uF +-20% 35V Electrolytic R113 V5133-R010J103 10 k ohm +-5% 1/8W Carbon C676 5345-108-25 1000 uF +-20% 25V Electrolytic R114 V5133-R010J102 1 k ohm +-5% 1/8W Carbon C678 5345-107-25 100 uF +-20% 25V Electrolytic...
- Page 23 Ref No. Part No. Description Ref No. Part No. Description RESISTORS RESISTORS R305 V5133-R010J332 3.3 k ohm +-5% 1/8W Carbon R507 5134-563J25P 56 k ohm +-5% 1/4W Carbon R306 V5133-R010J331 330 ohm +-5% 1/8W Carbon R508 V5133-R010J333 33 k ohm +-5% 1/8W Carbon R307 V5133-R010J331 330 ohm +-5% 1/8W Carbon...
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Page 24: Integrated Circuits
Ref No. Part No. Description Ref No. Part No. Description RESISTORS TRANSISTORS R674 5171-S071J183 18 k ohm +-5% 1W Metal Q101 5613-C143ZS Transistor, DTC143ZS R675 V5133-R010J105 1 M ohm +-5% 1/8W Carbon Q102 5613-2785(F) Transistor, 2SC2785(F) R701 5135-221J50P 220 ohm +-5% 1/2W Carbon Q173 5613-2785(F) Transistor, 2SC2785(F) - Page 25 Ref No. Part No. Description Ref No. Part No. Description DIODES COILS AND TRANSFORMERS 5635-HZT33 Zener, HZT33 33V 400mW L101 5995-470098 Coil 47 uH 5635-RD5R1EB2 Zener, RD5.1EB2 5.1V L203 5995-220098 Coil 22 uH D301 5636-1N4148M Diode,1N4148M L301 5995-150098 Coil 15 uH D302 5636-1N4148M Diode,1N4148M...
- Page 26 Ref No. Part No. Description Ref No. Part No. Description COILS AND TRANSFORMERS TRANSISTORS SF201 5679-01501450 Surface Acoustic Wave Filter Q451 5613-1573A(R) Transistor, 2SC1573A(R) 4363-01201 Antenna Coupler;(ANT) Q452 5613-1573A(R) Transistor, 2SC1573A(R) TH601 5192-01101 Posistor Q453 5613-1573A(R) Transistor, 2SC1573A(R) 6119-15501 VHF/UHF/CATV Tuner Assembly MISCELLANEOUS X101 5691-S2401802...