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Memorex MT2272 Service Manual

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MT2272
SERVICE MANUAL
COLOR TELEVISION RECEIVER
SUPPLEMENT
MFR'S VERSION A
This SUPPLEMENT must be used together SERVICE MANUAL for MT2271S.
All other test and repair procedures are as shown in the ORIGINAL MANUAL.
Please file this SUPPLEMENT with the ORIGINAL VERSIONS.
Design and specifications are subject to change without notice.

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Summary of Contents for Memorex MT2272

  • Page 1 MT2272 SERVICE MANUAL COLOR TELEVISION RECEIVER SUPPLEMENT MFR’S VERSION A This SUPPLEMENT must be used together SERVICE MANUAL for MT2271S. All other test and repair procedures are as shown in the ORIGINAL MANUAL. Please file this SUPPLEMENT with the ORIGINAL VERSIONS.

  • Page 2: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION R001 R002T4272J RC 2.7K OHM 1/4W R002 R903N8101J RC 100 OHM 1/8W R004 R903N8104J RC 100K OHM 1/8W R105 R903N8472J RC 4.7K OHM 1/8W R002T4332J RC 3.3K OHM 1/4W...
  • Page 3 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION R458 R002T2152J RC 1.5K OHM 1/2W R459 R002T2821J RC 820 OHM 1/2W R460 R002T4102J RC OHM 1/4W R461 R65581010J R,FUSE OHM 1W R501 R5X2AE3R3J R,CEMENT 3.3 OHM 7W R5X2AE1R2J R,CEMENT 1.2 OHM 7W...
  • Page 4 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION R715 R903N8472J RC 4.7K OHM 1/8W R716 R903N8102J RC OHM 1/8W R725 R903N8182J RC 1.8K OHM 1/8W R903N8222J RC 2.2K OHM 1/8W R726 R903N8222J RC 2.2K OHM 1/8W R903N8182J RC 1.8K OHM 1/8W...
  • Page 5 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION C109 CS0KSL412K CC 100 PF 50V SL C110 CS0KSL412K CC 100 PF 50V SL C112 E50HU2100M CE UF 16V C119 CQGTF0415Z CC 0.1 UF 50V F...
  • Page 6 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION C528 CC3LE0MH3M CC 0.0022UF 250V C530 CC3LE0MH3M CC 0 0.0022UF 250V CC3LE0M13M CC 0.001 UF 250V C531 E02LT2102M CE 1000 UF 16V C533 CC3LE0MH3M CC 0 0.0022UF 250V CC3LE0M13M CC 0 0.001 UF 250V...
  • Page 7 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION C1524 CS0KF0214Z CC 0.01 UF 16V F E50HU2100M CE UF 16V C1528 CS0KB04H2K CC 220 PF 50V B D101 D1VT001330 DIODE,SILICON 1SS133T-77 D102 D1VT001330 DIODE,SILICON 1SS133T-77...
  • Page 8 ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION Q408 TAATA12660 TRANSISTOR,SILICON KTA1266-AT(Y,GR) Q409 TC30041590 TRANSISTOR,SILICON 2SC4159(D,E) Q604 TCAT032034 TRANSISTOR, SILICON KTC3203_Y-AT TCAT03209Y TRANSISTOR SILICON KTC3209_Y-AT Q605 TCAT032034 TRANSISTOR, SILICON KTC3203_Y-AT TCAT03209Y TRANSISTOR SILICON KTC3209_Y-AT...

  • Page 9: Mechanical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST MT2271S MT2272 REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION CP701A 067U004029 WIRE HOLDER B2013H02-4P CP701B 069S240629 CONNECTOR PCB SIDE A2001WV2-4P CP802A 067U010049 WIRE HOLDER B2013H02-10P 067U005049 WIRE HOLDER B2013H02-5P CP802B 067U010049 WIRE HOLDER B2013H02-10P 067U005049 WIRE HOLDER...

  • Page 10: When Replacing Eeprom (Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC MT2271S MT2272 ADDRESS DATA DATA...

  • Page 11: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW (MT2272) J801 PCB110 (CRT PCB ASS'Y) V801 FB401 SP1001 TU001 PCB010 (MAIN PCB ASS'Y) ADD 115...

  • Page 12: Block Diagram

    BLOCK DIAGRAM (MT2272) AV/S SW IC SOUND DECORDER IC TONE CONTROL IC IC901 AN5829S IC302 M62420FP IC1502 NJM2283M Q701 Q702 BUFFER BUFFER 9 11 Q706 22 21 24 18 19 9 10 2 19 12 14 P.CON + 9V BUFFER...
  • Page 13 PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE (MT2272) Q103 D104 J710 J711 J712 SW105 R113 W016 W055 SW101 SW104 SW102 SW103 6.3A125VOR250V W845 W864 R803 L101 W053 R515 C505 W011 CP806_1 W052 FH502 FH501 F501 W010 TP022 R802 R804...
  • Page 14 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE (MT2272) R722 R703 R719 R707 R729 R710 R532 R533 R534 C1004 C1002 R1015 R1014 C708 R611 C602 R622 R650 R1512 C618 R639 R609 C623 C606 IC1502 R1519 R635 R620 R143 R819...
  • Page 15 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) ACCESSORY TU001 ENV56DB6G3 R101 R126 TM101 2.7K C003 R128 RC-DW040 TP001 OS101 S102X S102Y RPM7138-H5 FROM/TO POWER +30V PROTECT_A R110 PROTECT SW Q101 BUFFER KRC101MAT R140 R107 Q102 KTA1266 47 1/4W 47K 1/4W DEGAUSS_H...

  • Page 16: Chroma Schematic Diagram

    CHROMA SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) W806 FROM POWER W851 W847 UNREG+12V R629_1 Q603 KTC3203_Y C652 TO AV Q606 KTC3209_Y TU_VIDEO 11.3 W829 Q608 Q604 Q605 KTC3209_Y KTC3209_Y KTC3209_Y FROM/TO COMB FILTER C647 C614 R643 STEREO+5V 220P B Y_IN C_IN...
  • Page 17 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) L402 S103Y S103X CP802B CP802A HF57T18.5*10*10 B2013H02-5P B2013H02-5P FROM/TO CHROMA CLAMP CLAMP CLAMP CLAMP CLAMP G.OUT G.OUT G.OUT G.OUT G.OUT B.OUT B.OUT B.OUT B.OUT B.OUT V-OUT IC IC401 LA78041 R.OUT R.OUT R.OUT R.OUT R.OUT...

  • Page 18: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) FROM CHROMA RELAY DRIVE Q504 D516 KTC3198 UNREG+12V 1SS133 TO DEFLECTION/CRT R521 RY501 UNREG+18V ALKS321 150 2W T501 8140066S R517_1 15.66 C516 140.5 W848 TO SOUND 500V 0.0022 0.39 140.5 SOUND+B DEGAUSS COIL L503 D505 144.0...
  • Page 19 SOUND SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) FROM/TO MICON/TUNER AUDIO_MUTE C303 R309 0.033 B 1.8K C315 C316 R307 C901 0.022 0.47 BUFFER 4.7K Q901 KTA1266 1.8K TONE 136K AMP1 I2C BUS C902 INTERFACE SIMAMP1 BUFFER VOLAMP1 6.5K 6.5K 6.5K Q902 VOLAMP2...
  • Page 20 AV SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) VIDEO_3_IN AV (FRONT) J710 C702 R733 HTJ-032-03AY C701 R734 L3_IN AV (FRONT) J711 HTJ-032-03AW R740 R3_IN AV (FRONT) J712 FROM/TO SOUND HTJ-032-03AR FRONT_AUDIO_L FRONT_AUDIO_R REAR_AUDIO_R REAR_AUDIO_L C729 R724 C720 R725 P.CON+9V_1 BUFFER S_VIDEO 2.2K...
  • Page 21 COMB/FILTER SCHEMATIC DIAGRAM (MAIN PCB) (MT2272) FROM/TO CHROMA STEREO+5V C_IN Y_IN FROM/TO AV VIDEO_IN V1_SW VI_C_IN VIDEO_OUT VI_Y_IN S_VIDEO AV/S SW IC ON_TIMER IC1502 NJM2283M C1505 R1512 C1521 C1527 R1520 10P CH 1K 1/4W FROM MICON/TUNER R1523 R1521 C1520 W807...
  • Page 22 SPEC.NO. M3L5-39M O/R NO. C293602...

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