Memorex MT2327 Service Manual

Text of Memorex MT2327 User Guide:

• ELECTRICAL ADJUSTMENTS 2-16: LEVEL 1. 2. 3. 4. Receive a 70dB monoscope pattern. Connect the AC voltmeter to the pin 6 of CP601 and the GND. Activate the adjustment mode display of Fig. 1-1 and press the channel button (25) on the remote control to select "LEVEL". Press the VOL. UP/DOWN button on the remote control until the AC voltmeter is 75 ± 2mV. 2-13: CONSTANT VOLTAGE 1. 2. 3. 4. 5

• GENERAL SPECIFICATIONS G-1 TV CRT CRT Size / Visual Size 32 inch / 800.1mmV System CRT Type Normal Deflection 110 degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2Speaker Position Front Size 1.8 x 3.9 Inch Impedance 8 ohm Sound Output MAX 5.0 + 5.0 W 10%(Typical) 4.0 + 4.0 W NTSC3.58+4.43 /PAL60Hz No G-2 Tuning Broadcastin

• Memorex MT2327, ABC DEF GH ABC DEF GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 S810X DEFLECTION SIGNAL B.SIGNAL G.SIGNAL R.SIGNAL TUNER VIDEO SIGNAL WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL. WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED TU001 ENV56DB6G3 1 10 11 12 13 14 15 2 3 4 5 6 7 8 9 C118 4706.3V YK C128 1006.3V YK C103 820PB C104 0.01 F C120 0.001CH C109 100P SL C110 100P SL C124_1 1F C119 0.1 F C121 220PB C107 220P B C108220PB C007 0.1 B C140 0.0012 B C106 100P S

• Memorex MT2327, WAVEFORMS NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. H-2 200V 20µs/div 17 22 50V 20µs/div 50V 20µs/div 20 10V 5ms/div 19 21 50V 20µs/div SOUND 25 0.5V 1ms/div 26 200mV 1ms/div 200mV 1ms/div 27 10V 5ms/div18 28 200mV 1ms/div 16 2V 20µs/div 31 200mV 1ms/div 0.5V 1ms/div 32 0.5V 1ms/div 33

• Memorex MT2327, DISASSEMBLY INSTRUCTIONS Supply soldering from upper position to lower position IC Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 2-6.) 2. Fig. 2-6 Soldering IronSolder IC Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 2-7.) 3. Fig. 2-7 Soldering Iron Braided Shield Wire NOTE Do not absorb the solder to excess. IC When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- tip Soldering Iron. (Refer to Fig. 2-8.) 4.

• Memorex MT2327, 17 33 49 1 R636 R605 R619 R625 R642R646 C616 R633 R628 C655 C623_1 R609 C618 C636 R601 R602 C622 R650 C650 R639 IC601 C913 C908 R903 IC901 R306 C324 R307 C332 R310 C315 R309 IC302 R311 R118 R109 C108 C107 R108 C103 R127 C113 C121 C114 R134 R129 C609 R119 R104 R121 IC101 R122 R103 R120 R124 R123 C140 R101 R128 R126 R112 R115 R635 R130 IC1501 C1506 C1510 C1508 R1503 C1507 C1509 C1511 R1505 R1501 C1502_1 R1527 C1515 IC1502 C1526 C1517 R1504 C1518 R1506 C1516 R1517 C1519 C1523 R1508 R532 R533 R437 R534 R814 R816 R811 R815 R809 R813 C810 C809 C811 R808 R801 R810 C801 R817 R818 R819 C408 R722 R725 R726 R728 R723 R711 R709 R703 R704 R729 R727 R731 R710 C708 R622 R615 C602 R611 R004 C1004 R1014 R1

• Memorex MT2327, REMOCON 21 22 23 15 14 32 59 64 63 CF601 SAW FILTER CHROMA IC IC601 M61250FP PUMP UP AMP + - 52 3 V-OUT IC IC401 LA78041 Q801, Q804 RED OUT Q803, Q805 GREEN OUT Q802, Q806 BLUE OUT CRT V801 11 6 8 RGB Heater F7 34 RED R 35 GREEN G 36 BLUE B 26CVIN MICON IC IC101 OEC7072A X-RAY TEST SW. Q403 11 AUDIO MUTE 10 X-RAY_TEST 9 OS101 1 X-RAY TEST SW Q404 FSC IN 42 6 E-1 E-2 POWER VOL UP KEY1 6 CH UP VOL DOWN CH DOWN KEY2 7 SOUND DECORDER IC IC901 AN5829S 18 19 AC IN F501 8 5 T501 VR502 +B ADJ. L503 DEGAUSS COIL RY501 RELAY Q504 RELAY DRIVE 23 22 21 24 2 3 2 REAR_AV_OUT (STEREO) J707 3 VIDEO AMP IC IC702 NJM2245L 5 3 1 Q901 BUFFER MEMORY IC IC199 S-24C08ADPA-01 S

• Memorex MT2327, C-2 WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. +2 INI +0 +1 +3 +4 +A +9 +5 +6 +7 +8 +F +B +C +D +E Table 1 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. The unit will now have the correct DATA for the new MEMORY IC. Enter DATA SET mode by setting VOLUME to minimum. Press both VOL. DOWN button on the set and Channel button (6) on the

• Memorex MT2327, GENERAL SPECIFICATIONS CH Label No Sleep Timer Yes Sound Mute Yes V-chip Rating No G-8 OSD Language English French Spanish G-9 Clock and Sleep Timer Max Time 120 Min Timer Step 10 Min On/Off Timer Program(On Timer / Off Timer) No Wake Up Timer No Timer Back-up (at Power Off Mode) more than -- Min Sec G-10 Remote Unit RC-DJ Control Glow in Dark Remocon No Format NEC Custom Code 86-05 h Power Source Voltage(D.C) 3V UM size x pcs UM-4 x 2 pcs Total Keys 42 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 Ye

• Memorex MT2327, MECHANICAL EXPLODED VIEW I-1 PCB010 (MAIN PCB ASS'Y) 201 206 FB401 TU001 201 206 116 112 104 205 115 115 117 117 106 V801 107 207 207 117 117 107 J801 PCB110 (CRT PCB ASS'Y) 207 207 110 108 202 202 202 202 118 102 PCB280 (STEREO JACK PCB ASS'Y) 101 111 109 SP1002 204 113 SP1001 204 113 204 119 119 119 203 204 203 203 203 103 114 203 105 203 203

• Memorex MT2327, D-5 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB R803 R805 J801 CP802B CP803B TP022 TP024 CP801 CP806 MAIN PCB CP802A CP1001 CP502 VR401 VR402 S501A FB401 T501 CP803A VR404 VR403 J707 J701 J705 TU001 CP601 S501B AC IN TP001 CP401 CRT SPEAKER L503 CRT VR502 TP401 D451 CD803 CD802 J702 J703 J704 STEREO PCB CD701 CP701 CD801 CP805 CD805

• ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 S809Y S809X R424 18K +-1% R408 3.9K +-1% R409 15K +-1% R417_1 12K +-1% VR403 22K SIDE PCC VR404 22K H SIZE VR401 2.2K V-POSI VR402 10K V-LINER T401 ETH19Y203AY 12 345 CD805 CU823001 CD801 CU823001 CP805 A2361WV2-2P 1 2 CP801 A2361WV2-2P 1 2 B G R 11 6 8 10 9 175 V801 M80LNK185X90 Q401 2SD2553 H.OUTPUT

• Memorex MT2327, MICON/TUNER 2 WAVEFORMS 0.5V 20µs/div 200mV 5ms/div 4 3 200mV 20µs/div H-1 NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. CHROMA 1 1V 0.1µs/div 6 0.5V 20µs/div 200mV 20µs/div 7 9 200mV 20µs/div 0.5V 5ms/div 10 8 20V 20µs/div 11 1V 20µs/div 12 1V 20µs/div 1V 20µs/div13 DEFLECTION/CRT 14 0.5V 5ms/div 15 20V 20µs/div 29 500mV 200ns/div

• Memorex MT2327, Masking Tape (Cotton Tape) DISASSEMBLY INSTRUCTIONS 2. REMOVAL IC Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 2-1.) 1. Fig. 2-1 NOTE REMOVAL AND INSTALLATION OF FLAT PACKAGE IC Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it. NOTE Masking is carried out on all the parts located within 10 mm distance from IC leads. Blower type IC desoldering machine IC Heat the IC leads using a blower type IC desoldering machine. (Refer to Fig. 2-2.) 2. Fig. 2-2

• Memorex MT2327, 6. AVOID AN X-RAY1. KEEP THE NOTICES 5. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE In the condition that an explosion-proof cathode- ray tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with it. Safety is secured against an X-ray by consider- ing about the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage pe- ripheral circuit, use the designated parts and make sure not modify the circuit. Repairing except indicates causes rising of high voltage, and it emits

• Memorex MT2327, ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 IC702 NJM2245LVIDEO AMP IC 12345678 J705 YKF51-5503 S_VIDEO 12 34 56 EE H1 NC H1 H2 J701 MSP-213V2-432_PBSN REAR_AV-IN (STEREO) 1 234 5 6 H1 H1H2 EE J707 MSP-213V1-432_PBSN REAR_AV_OUT (STEREO) 1 23 4 5 AUDIO SIGNAL CP701 A2001WV2-4P 1 2 3 4 S802X S802Y S808Y S808X TUNER VIDEO SIGNAL WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL. WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED C721 47010V YK C717 1016V KA C706 1016V KA C728 1016V KA C726 1016V KA C708

• Memorex MT2327, ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION TRANSISTORS MISCELLANEOUS ! Q802 TCATC3199Y TRANSISTOR SILICON KTC3199_Y-AT CP701 069S240629 CONNECTOR PCB SIDE A2001WV2-4P ! Q803 TCATC3199Y TRANSISTOR SILICON KTC3199_Y-AT CP801 069S320010 CONNECTOR PCB SIDE A2361WV2-2P ! Q804 TCA0042170 TRANSISTOR SILICON KTC4217(O,Y) CP805 069S320010 CONNECTOR PCB SIDE A2361WV2-2P ! Q805 TCA0042170 TRANSISTOR SILICON KTC4217(O,Y) CP806 069W010010 CONNECTOR PCB SIDE 005P-2100

• Memorex MT2327, MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 101 A3M002N720 CABINET,FRONT ASSY 102 701WPJB843 CABINET,FRONT 103 702WPA0920 CABINET,BACK(1/6) 104 899HV3T000 HOLDER,ANODE WIRE 105 722A08A127 SHEET,RATING 106 723000C005 FILM,DECORATION 107 741WUA0021 SPRING,EARTH 108 713WPA0229 GUIDE,REMOCON 109 724000A002 SHEET,CSA 110 735WPA0693 BUTTON,FRAME 111 800WQ00045 FELT SHEET 5x150xT0.5 112 800WQ0A013 FELT,SHEET 5x30xT0.5 113 800WQ00054 FELT,SHEET 5x80xT0.8 114 A3M002N740 CABINET, BACK ASS'Y 115 800WQ0A008 FELT,SHEET 150x5 T=0.3 116 800WQ0A00

• Memorex MT2327, ELECTRICAL ADJUSTMENTS 2-6: SUB TINT/SUB COLOR 1. 2. 3. 4. 5. 6. 7. 8. 9. Receive the color bar pattern. Connect the oscilloscope to TP024. Activate the adjustment mode display of Fig. 1-1 and press the channel button (22) on the remote control to select "TINT". Press the VOL. UP/DOWN button on the remote control until the section "A" becomes as straight line. (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 con

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Memorex MT2327 Owner's manual 02-12-2023 28

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