User manual MEMOREX MT1125SM

[. . . ] MT1125 SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR'S VERSION A Design and specifications are subject to change without notice. SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. 6. AVOID AN X-RAY Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. [. . . ] 2-3 until the white color is looked like a white. BASIC ADJUSTMENTS On-Screen Display Adjustment In the condition of NO indication on the screen. DOWN button on the set and the Channel button (9) on the remote control for more than 2 seconds to appear the adjustment mode on the screen as shown in Fig. NOTE Use the Channel buttons (1-8) on the remote control to select the options shown in Fig. Press the Channel button (0) on the remote control to end the adjustments. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 2-1 and press the channel button (4) on the remote control. Press the channel button (1) on the remote control. UP/DOWN button on the remote control until the white 10% is starting to be visible. Connect the digital voltmeter between the pin 2 of CP101 and the pin 6 (GND) of CP101. Activate the adjustment mode display of Fig. 2-1 and press the channel button (5) on the remote control. Press the channel button (1) on the remote control. UP/DOWN button on the remote control until the digital voltmeter is 2. 0 ± 0. 05V. 0. 2-4 D1-1 ELECTRICAL ADJUSTMENTS 2-5: SUB TINT/SUB COLOR 1. Connect the synchro scope to pin 1 of CP101 and the pin 6 (GND) of CP101. Activate the adjustment mode display of Fig. 2-1 and press the channel button (4) on the remote control. Press the channel button (4) on the remote control. UP/DOWN button on the remote control until the waveform becomes as shown in Fig. Press the CH DOWN button once to set to "COLOR" mode. [. . . ] POUR UNE PROTECTION CONTINUE LES RISQUES D'INCEIE N'UTILISER QUE DES FUSIBLE DE MEME TYPE 6. 3A 125V (F501). 7 CP502 TV-50P-02-A1 2 1 DEGAUSS COIL L502 8H250009 2 1 6 POWER REG. IC501 STR30110 R502 1. 2 7W D501 C503 RM11C D502 6 1KV 1KV 0. 001 B 0. 001 B RM11C RY101 ALKS321 1 2 3 4 5 1 4 D504 RM11C C504 MS501 23MICA D503 RM11C 3 2 1 0 137. 3 179. 6 136. 6 6. 9 D125 330K 1/4W R508 10K 1/2W 5 18K +-1% R503 R509 HS501 763WAA0112 TP501 1S2472 TH501 PTH451C460BG3R0Q140T 2 3 5 3 1 W818 R506 R507 47 1/4W 180 160V 100 VZ 20W D126 EM1C C133 1KV 0. 001 R177 1. 2K 10W NC 4 6. 3A 125V 2 L501 9-000074 C501 FH502 6. 3A 125V FH501 F501 6. 3A125V EYF-52BC CP501 THL-P03P-B1 1 AC IN 120V 60HZ CD501 0R614908 1 2 BLACK WHITE WIDE BLADE C507 5 EYF-52BC 160V10 VZ C519 R501_2 SOLID B 250V 0. 22 ECQUL 1M 1/2W +-10% R515 C506_1 1. 5 FROM/TO DEFLECTION/CRT +B GND +12V D127 11E1N FROM/TO MICON/TUNER 3W C132 25V 1000 YK W821 200V 680 MXR 4 2 4 +B POWER 3 AT+12V GND 3 TO CHROMA +B AT+12V 2 2 1 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL. CAUTION: SINCE THESE PARTS MARKED BY CRITICAL FOR SAFETY, USE ONES DESCRIBED IN PARTS LIST ONLY ARE ATTENTION: LES PIECES REPAREES PAR UN ETANT DANGEREUSES AN POINT DE VUE SECURITE N'UTILISER QUE CELLS DECRITES DANS LA NOMENCLATURE DES PIECES PCB010 TM9425 1 A B C D E F G H G-7 G-8 A B C D E F G H SOUND SCHEMATIC DIAGRAM 8 FROM MICON/TUNER I2C_SDA I2C_SCL AUDIO_MUTE 30 8 L704 C761 1K C769 100 R757 R755 TU_AUDIO_OUT TP701 100 22uH 16V 47 KA R753 4. 7K 4. 7K FROM CHROMA 0. 018 M R743 TU_AUDIO_OUT 100 R702 100 R701 R745 7 220P B C702 P. CON+9V 220P B 7 R752 C775 C701 3. 3 4. 4 3. 7 9 6 S3 S5 S7 VR5 7 8 TONE AMP1 + 6. 5K CONTROL LOGIC + TONE VR6 AMP2 15 14 13 4. 4 0 S4 S6 S8 I2C BUS INTERFACE 6. 5K 3. 8 10 0 1. 8K 0. 033 M 50V 2. 2 KA C764 C770 0. 022 M 3 136K VR1 + + 1. 8K + C777 0. 47 TF 4 VR3 S1 4. 4 4. 2 4. 2 4. 4 31 50V 4. 7 KA C714 50V 4. 7 KA C716 50V 4. 7 KA C720 50V 4. 7 KA TONE CONTROL IC705 M62420SP 50V 4. 7 KA 1 REF REF REF 2 3. 4 5 C743 0. 1 TF R705 1. 8M MTS DECORDER AN5828NS IC701 GND AGC Matrix OUT SW DAC ZAP IIC Decoder L-R Filter L+R Filter L-R Demod L+R Demod St. PLL Cancel Pilot Filter Stereo Det Pilot Filter Noise Filter Spectral VCA Input Det SAP 560 50V 2. 2 KA S2 6 2. 3 2. 3 2. 3 24 23 22 21 2. 3 NC 0 20 5. 0 19 18 5. 0 17 0 16 3. 7 15 3. 6 14 2. 6 13 3. 7 SOUND_R R729 C748 32 50V 2. 2 KA fH. 2fH Trap Filter RMS Det Wide Band dbx De-Emph 16V 47 1 0 C713 R723 220K 2 2. 3 50V4. 7 KA 3 2. 3 C719 4 2. 3 50V2. 2 KA 5 2. 2 C725 6 0. 4 7 16V10 TT 0. 1 TF +-10% Vcc 8 50V 0. 33 KA 2. 4 9 2. 4 C737 10 0. 4 11 16V3. 3 TT +-10% 2. 3 C742 12 3. 4 W842 0. 1 TF AUDIO_L TP702 SOUND_L 33 R744 1K 16V 47 KA R731 560 0. 1 TF C749 50V 2. 2 KA 1. 8K 0. 033 M C780 KA Cancel Offset Expand Wide Band C765 Cancel Offset Switch De-Emph (L-R)/SAP 75us Filter SAPout SIMAMP1 VOLAMP16. 5K VOLAMP2 SIMAMP2 6. 5K VR2 + 136K 1. 8K VR4 20 19 18 17 16 8. 9 4. 2 4. 2 4. 4 3. 4 C771 C776 0. 1 TF C740 0. 047 TF C738 C736 W836 C709 6 12 5. 0 11 5. 0 R756 100K R703 Filter Wide Band Expand Spectral Demod SAP Det Noise 12K RMS Det Spectral 0. 022 M 0. 47 TF R751 C778 3. 3 Filter SAP C731 0. 018 M 0. 1 F 50V4. 7 KA 50V4. 7 KA C708 0. 022TF C715 5 50V4. 7 KA 0. 001 B C762 C757 C767 C781 C782 5. 1 0. 022 F 5 C722 C727 C735 C739 R704 C730 50V 4. 7 FROM/TO DEFLECTION/CRT 100uH L701 KA P. CON+5V SOUND+B S-GND SOUND IC351 AN5277 4 ATT. RIPPLE FILTER NC INPUT GND NC MUTE OUTPUT GND VCC STAND-BY ATT. CONT. 12K 4 1 NC 0 2 0 3 20. 5 4 0 5 0 6 0 7 12. 4 8 1. 1 9 0 10 24. 6 R357 W811 11 17. 1 12 12. 4 10K C355 35V3300 WA 35V 470 MHE W809 35 CP351 TID-X04P-Z1BK 1 SP OUT L+ SP OUT LSP OUT RSP OUT R+ 34 2 3 4 SPEAKER 35V 100 MHE 35V 470 MHE C356 HS351 763WAE0099 C351_1 KA 1 2 3 4 SPEAKER SP351 SA04A01DWA C353 C358 1 3 1 KA 3 R353 50V C352_1 10K R352 10K 2 R354 8. 2K 50V 4. 7 MH7 C357 50V 2 1 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL. CAUTION: SINCE THESE PARTS MARKED BY CRITICAL FOR SAFETY, USE ONES DESCRIBED IN PARTS LIST ONLY ARE ATTENTION: LES PIECES REPAREES PAR UN ETANT DANGEREUSES AN POINT DE VUE SECURITE N'UTILISER QUE CELLS DECRITES DANS LA NOMENCLATURE DES PIECES AUDIO SIGNAL PCB010 TM9425 1 A B C D E F G H G-9 G-10 WAVEFORMS MICON/TUNER 1 200mV 5ms/div 6 0. 5V 20µs/div 11 1V 0. 5ms/div 2 0. 5V 20µs/div 7 0. 5V 20µs/div 12 20V 20µs/div 3 200mV 20µs/div 8 0. 5V 20µs/div 13 200mV 20µs/div 4 200mV 5ms/div 9 200mV 20µs/div 14 0. 5V 5ms/div CHROMA 5 100mV 1ms/div 10 0. 5V 20µs/div 15 1V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. H-1 WAVEFORMS 16 1V 20µs/div 21 200V 20µs/div 26 50V 20µs/div SOUND 17 1V 20µs/div 22 10V 5ms/div 27 0. 5V 1ms/div DEFLECTION/CRT 18 0. 5V 5ms/div 23 10V 5ms/div 28 1V 1ms/div 19 20V 20µs/div 24 50V 20µs/div 30 200mV 1ms/div 20 2V 20µs/div 25 50V 20µs/div 31 200mV 1ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. H-2 WAVEFORMS 32 1V 1ms/div 33 1V 1ms/div 34 2V 1ms/div 35 2V 1ms/div H-3 MECHANICAL EXPLODED VIEW 201 112 201 201 201 201 117 119 114 J801 105 201 111 201 118 106 119 117 119 105 PCB110 (CRT PCB ASS'Y) 115 L502 118 118 102 116 V801 118 113 116 119 202 120 103 202 ATC001 104 204 204 202 105 TU001 204 PCB010 (MAIN PCB ASS'Y) 203 121 109 110 203 SP351 122 108 101 107 I-1 MECHANICAL REPLACEMENT PARTS LIST REF. [. . . ]