Service Manual
Page 1
19" LCD TV W/ATSC & NTSC-M MEMOREX MLT1912 "B" SERVICE MANUAL © 2007- CONTENTS IMPORTANT SERVICE SAFETY INFORMATION DISASSEMBLY FOR REPAIR WIRING DIAGRAM EXPLODED VIEW (CABINET PARTS LIST Note: Follows a policy of this reason specifications may be changed without notice. For this manual. PRINTED IN Y3719(Y371900-17541-004-05-42) CAUTION: Before servicing the chassis, read the "IMPORTANT SERVICE SAFETY INFORMATION" section on page 2 of continuous advancements in development.
19" LCD TV W/ATSC & NTSC-M MEMOREX MLT1912 "B" SERVICE MANUAL © 2007- CONTENTS IMPORTANT SERVICE SAFETY INFORMATION DISASSEMBLY FOR REPAIR WIRING DIAGRAM EXPLODED VIEW (CABINET PARTS LIST Note: Follows a policy of this reason specifications may be changed without notice. For this manual. PRINTED IN Y3719(Y371900-17541-004-05-42) CAUTION: Before servicing the chassis, read the "IMPORTANT SERVICE SAFETY INFORMATION" section on page 2 of continuous advancements in development.
Service Manual
Page 2
... to which can be easily accessible in a particular installation. IMPORTANT SERVICE SAFETY INFORMATION 1. Do not block any heat sources such as power-supply cord or plug is no guarantee that interference will not go into AC outlets one blade is used in accordance with a cart, stand, tripod, bracket, or table specified by turning the equipment off the main power to operate the equipment. These limits...
... to which can be easily accessible in a particular installation. IMPORTANT SERVICE SAFETY INFORMATION 1. Do not block any heat sources such as power-supply cord or plug is no guarantee that interference will not go into AC outlets one blade is used in accordance with a cart, stand, tripod, bracket, or table specified by turning the equipment off the main power to operate the equipment. These limits...
Service Manual
Page 3
TO REMOVE THE REAR CABINET 2. TO REMOVE THE MAIN PCB SHIELD COVER 3. Remove the 8 screws (C) from the back cabinet. DISASSEMBLY FOR REPAIR TO DISASSEMBLY THE FOOT COVER 1. Remove the 14 screws (B) from the main pcb shield cover. 3 Remove the 2 screws (A) from foot cover and foot stand.
TO REMOVE THE REAR CABINET 2. TO REMOVE THE MAIN PCB SHIELD COVER 3. Remove the 8 screws (C) from the back cabinet. DISASSEMBLY FOR REPAIR TO DISASSEMBLY THE FOOT COVER 1. Remove the 14 screws (B) from the main pcb shield cover. 3 Remove the 2 screws (A) from foot cover and foot stand.
Service Manual
Page 4
Remove the 4 screws (F) from the front cabinet. Remove the 14 screws (E) from the LCD MTG BLK. 4 TO REMOVE THE LCD MTG BLK 6. Remove the 7 screws (D) from the jack shield cover. DISASSEMBLY FOR REPAIR TO REMOVE THE JACK SHIELD COVER 4. TO REMOVE THE FRONT CABINET 5.
Remove the 4 screws (F) from the front cabinet. Remove the 14 screws (E) from the LCD MTG BLK. 4 TO REMOVE THE LCD MTG BLK 6. Remove the 7 screws (D) from the jack shield cover. DISASSEMBLY FOR REPAIR TO REMOVE THE JACK SHIELD COVER 4. TO REMOVE THE FRONT CABINET 5.
Service Manual
Page 7
... (+)(ROHS) 041-03532-002 N353 HANDSET BATTERY SPRING (-)(ROHS) 048-04020-006 Y3719 H/S CONTACT RUBBER (FOR MEMOREX) (D.BL.287C / GY.424C) W/WHITE SK. (ROHS) QTY 1 1 1 1 7 1 1 1 1 1 1 1 2 1 1 1 1 1 1 PARTS LIST 7 Ref. P.C.B (94HB) T=1.2MM (36X146.5)MM (ROHS) 002-02222-150 IC PT2222-002 (PTC) ...SCREW 2X6 BT (ROHS) 1 MI-Y3419-001 Y3419 (MI) CHASSIS ASSY 1 MI-34190-100 Y3419 (MI) MAIN BOARD 1 CHASSIS ASSY ZD1 002-00033-640 IC KA33V (FAIRCHILD) TO-92 1 (MI) VOLTAGE STABILIZER; No Parts No. Ref. W/COSMETIC BLK-320 (39 KEY) BLACK COLOR 001-04020-710 T402 REMOTE...
... (+)(ROHS) 041-03532-002 N353 HANDSET BATTERY SPRING (-)(ROHS) 048-04020-006 Y3719 H/S CONTACT RUBBER (FOR MEMOREX) (D.BL.287C / GY.424C) W/WHITE SK. (ROHS) QTY 1 1 1 1 7 1 1 1 1 1 1 1 2 1 1 1 1 1 1 PARTS LIST 7 Ref. P.C.B (94HB) T=1.2MM (36X146.5)MM (ROHS) 002-02222-150 IC PT2222-002 (PTC) ...SCREW 2X6 BT (ROHS) 1 MI-Y3419-001 Y3419 (MI) CHASSIS ASSY 1 MI-34190-100 Y3419 (MI) MAIN BOARD 1 CHASSIS ASSY ZD1 002-00033-640 IC KA33V (FAIRCHILD) TO-92 1 (MI) VOLTAGE STABILIZER; No Parts No. Ref. W/COSMETIC BLK-320 (39 KEY) BLACK COLOR 001-04020-710 T402 REMOTE...
Service Manual
Page 8
...PCB-TYPE (ALRIGHT) (ROHS) 052-00503-100 CERAMIC RESONATOR: 1 503KHZ ZTB503F58;2 PIN 20 OHM;500PF;(MOBICON) (ROHS) 052-04000-002 CRYSTAL:4 MHZ HC49S (2 1 PIN) (MEC) +-30 PP FUNDAMENTAL; FUNDAMENTAL; (VAST) (ROHS) 061-56258-001 TV TUNER ENV56M25D8F 1 (PANASONIC)(ROHS) (ATSC/NTSC/QAM TUNER) ...(ROHS) 019-10000-001 BI-COLOR LED LAMP (WHITE 1 DIFFUSED);ROHS L-3WEGW "KINGBRIGHT"RED EFFICIENCY/GREEN 021-23609-103 STEREO JACK 3.6MM 9 PINS 1 CKX*3.5-02AC(ALRIGHT) (ROHS) 025-20003-203 3P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 025-20004-202 4P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS...
...PCB-TYPE (ALRIGHT) (ROHS) 052-00503-100 CERAMIC RESONATOR: 1 503KHZ ZTB503F58;2 PIN 20 OHM;500PF;(MOBICON) (ROHS) 052-04000-002 CRYSTAL:4 MHZ HC49S (2 1 PIN) (MEC) +-30 PP FUNDAMENTAL; FUNDAMENTAL; (VAST) (ROHS) 061-56258-001 TV TUNER ENV56M25D8F 1 (PANASONIC)(ROHS) (ATSC/NTSC/QAM TUNER) ...(ROHS) 019-10000-001 BI-COLOR LED LAMP (WHITE 1 DIFFUSED);ROHS L-3WEGW "KINGBRIGHT"RED EFFICIENCY/GREEN 021-23609-103 STEREO JACK 3.6MM 9 PINS 1 CKX*3.5-02AC(ALRIGHT) (ROHS) 025-20003-203 3P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 025-20004-202 4P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS...
Service Manual
Page 9
...PARTS LIST 9 Ref. No CN701 N700 FOR N700 CN6 CN3,4 CN5 X2 U204 U306 U304,305 U504 U502 U102 Parts No. Description QTY S) 025-20005-201 5P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 061-06038-001 INFRARED REMOTE...TYPE (2MM 2 PITCH) JST (ROHS) 025-20010-202 10P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 052-25000-004 CRYSTAL:25MHZ;16PF;+-30 1 PPM HC49S (MOBICON)(ROHS) SMT-Y3419- IC R2S15900SP (RENESAS) 1 195 SOP-28 SMT AUDIO SIGNAL...14 (SMT) (1001U30); ANALOG MULTI., DEMULTIPLEXER IC U302,303 003-20085-140 CHIP TRANSISTOR SP8J5 2 (ROHM) SO8 (SMT) P- CHANNEL MOSFET IC (ROHS) Q102...
...PARTS LIST 9 Ref. No CN701 N700 FOR N700 CN6 CN3,4 CN5 X2 U204 U306 U304,305 U504 U502 U102 Parts No. Description QTY S) 025-20005-201 5P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 061-06038-001 INFRARED REMOTE...TYPE (2MM 2 PITCH) JST (ROHS) 025-20010-202 10P WAFER V-TYPE (2MM 1 PITCH) JST (ROHS) 052-25000-004 CRYSTAL:25MHZ;16PF;+-30 1 PPM HC49S (MOBICON)(ROHS) SMT-Y3419- IC R2S15900SP (RENESAS) 1 195 SOP-28 SMT AUDIO SIGNAL...14 (SMT) (1001U30); ANALOG MULTI., DEMULTIPLEXER IC U302,303 003-20085-140 CHIP TRANSISTOR SP8J5 2 (ROHM) SO8 (SMT) P- CHANNEL MOSFET IC (ROHS) Q102...
Service Manual
Page 10
... SW.DIODE BAV70LT1 (ON 1 SEMICONDUCTOR) SMT (ROHS) U503 004-81015-610 DUAL CHANNEL ESD 1 PROTECTION DIODE (SMT) AZ1015-04S (ANGUS) SOT23-6L (ROHS) D306,307... SM4001 2 (ROHS) D102,201,202,203,304,802 004-84148-400 SW. No Parts No. Description QTY R128,814,815,837,838 005-52123-301 CHIP RESISTOR 12 K ... QTY SOT-23 (MOTOROLA)(ROHS) ZD3,4,5,6,7,8,9,10,11,12, 004-80039-212- No Parts No. DIODE LL4148 (GOOD 6 EXCEL) SMT (ROHS) R7,8,9,10,101,103,306... RESISTOR 100 K +-5% 6 (1608) (ROHS) PARTS LIST 10 Ref. ZENER DIODE TCLLZ39V 13 15,16,17 001 (TAK CHEONG) (SMT) 3.9V...
... SW.DIODE BAV70LT1 (ON 1 SEMICONDUCTOR) SMT (ROHS) U503 004-81015-610 DUAL CHANNEL ESD 1 PROTECTION DIODE (SMT) AZ1015-04S (ANGUS) SOT23-6L (ROHS) D306,307... SM4001 2 (ROHS) D102,201,202,203,304,802 004-84148-400 SW. No Parts No. Description QTY R128,814,815,837,838 005-52123-301 CHIP RESISTOR 12 K ... QTY SOT-23 (MOTOROLA)(ROHS) ZD3,4,5,6,7,8,9,10,11,12, 004-80039-212- No Parts No. DIODE LL4148 (GOOD 6 EXCEL) SMT (ROHS) R7,8,9,10,101,103,306... RESISTOR 100 K +-5% 6 (1608) (ROHS) PARTS LIST 10 Ref. ZENER DIODE TCLLZ39V 13 15,16,17 001 (TAK CHEONG) (SMT) 3.9V...
Service Manual
Page 11
...-325 CERAMIC CHIP CAP 0.01 UF +- 3 10% 25V(1608) (MCH182C103KK) (ROHS) C121,203,204,205,206,213 006-72105-525 CERAMIC CHIP CAP 1 UF 22 PARTS LIST 11 Ref. Description QTY ,214,216,217,223,224,225, +80%-20% 25V(1608) (ROHS) 228,249,250,251,255,257, Y5V 259,822,825... CERAMIC CHIP CAP 330 PF +- 2 10% 50V (1608) (ROHS) X7R C113 006-72391-350 CERAMIC CHIP CAP 390 PF +- 1 10% 50V (1608) (ROHS) X7R No Parts No. Ref. No...
...-325 CERAMIC CHIP CAP 0.01 UF +- 3 10% 25V(1608) (MCH182C103KK) (ROHS) C121,203,204,205,206,213 006-72105-525 CERAMIC CHIP CAP 1 UF 22 PARTS LIST 11 Ref. Description QTY ,214,216,217,223,224,225, +80%-20% 25V(1608) (ROHS) 228,249,250,251,255,257, Y5V 259,822,825... CERAMIC CHIP CAP 330 PF +- 2 10% 50V (1608) (ROHS) X7R C113 006-72391-350 CERAMIC CHIP CAP 390 PF +- 1 10% 50V (1608) (ROHS) X7R No Parts No. Ref. No...
Service Manual
Page 12
... 134 SEMICONDUCTOR) SOIC- 8(SMT) 20V/6A P-CH. POWER MOSFET IC(ROHS) 002-29032-001- Description 006-72472-350 CERAMIC...-03303-440 IC LGDT3303 (LG) TQFP-100 1 (SMT) VSB/QAM RECEIVER IC (ROHS) 002-06022-001- IC LD1117L33TN3-A-R (UTC) 1 190... PCM1753DBQR (T.I.) SSOP- 1 16 SMT (ROHS) 24-BIT,192KHZ AUDIO CONVERTER IC 002-02150-001- Description QTY 900 CHASSIS ASSY 001-...,801 F301 F302 R701 R702 R704 R703 R705 R700 Parts No. Y3419 (SMT) KEY BOARD 700 CHASSIS ASSY...-001- IC S29JL032H70TFI010 1 184 (SPANSION) TSOP48 SMT;32MB FLASH MEMORY Ref. ROHS 050-43216-202 2A/63V (SMT) ...
... 134 SEMICONDUCTOR) SOIC- 8(SMT) 20V/6A P-CH. POWER MOSFET IC(ROHS) 002-29032-001- Description 006-72472-350 CERAMIC...-03303-440 IC LGDT3303 (LG) TQFP-100 1 (SMT) VSB/QAM RECEIVER IC (ROHS) 002-06022-001- IC LD1117L33TN3-A-R (UTC) 1 190... PCM1753DBQR (T.I.) SSOP- 1 16 SMT (ROHS) 24-BIT,192KHZ AUDIO CONVERTER IC 002-02150-001- Description QTY 900 CHASSIS ASSY 001-...,801 F301 F302 R701 R702 R704 R703 R705 R700 Parts No. Y3419 (SMT) KEY BOARD 700 CHASSIS ASSY...-001- IC S29JL032H70TFI010 1 184 (SPANSION) TSOP48 SMT;32MB FLASH MEMORY Ref. ROHS 050-43216-202 2A/63V (SMT) ...
Service Manual
Page 13
...- CHIP TRANSISTOR NPN 2 114 FMMT3904 (HSMC) (ROHS) Q1,2,4 003-23906-001- No Parts No. Description QTY R100 005-52302-301 CHIP RESISTOR 3 K +-5% 1 (1608) (MCH03EZHJ302...12,13,14,15,16,17, 005-53220-301 CHIP RESISTOR (MULTIPLE) 10 18,19,22 22 OHM +-5%(1608) X 4 (RCML08W220JB) (ROHS) RN1,2,3,4,5,6,7,8,9,10 005-53470-... No U1 U2 Q8,9 Parts No. IC R8A69950BG (RENESAS) 1 195 (BGA-297) SMT ATSC DIGITAL TV DECODER IC (ROHS) 003...88 005-52202-301 CHIP RESISTOR 2 K +-5% 2 (1608) (MCR03EZHJ202) (ROHS) R18,19,20,44,108,109,110, 005-52220-301 CHIP RESISTOR 22 OHM +-5% 10 111,119...
...- CHIP TRANSISTOR NPN 2 114 FMMT3904 (HSMC) (ROHS) Q1,2,4 003-23906-001- No Parts No. Description QTY R100 005-52302-301 CHIP RESISTOR 3 K +-5% 1 (1608) (MCH03EZHJ302...12,13,14,15,16,17, 005-53220-301 CHIP RESISTOR (MULTIPLE) 10 18,19,22 22 OHM +-5%(1608) X 4 (RCML08W220JB) (ROHS) RN1,2,3,4,5,6,7,8,9,10 005-53470-... No U1 U2 Q8,9 Parts No. IC R8A69950BG (RENESAS) 1 195 (BGA-297) SMT ATSC DIGITAL TV DECODER IC (ROHS) 003...88 005-52202-301 CHIP RESISTOR 2 K +-5% 2 (1608) (MCR03EZHJ202) (ROHS) R18,19,20,44,108,109,110, 005-52220-301 CHIP RESISTOR 22 OHM +-5% 10 111,119...
Service Manual
Page 14
...ACM201209A301 5 300 OHM +-25%(2012)0.05 OHM DCR;3A MAX. (MAXECHO); Y3419 100~240V "MEMOREX" 1 320 UL APP. A077N2180103AB*YC; No 100,102,104,108,112,114, 116,124,125... 1 1ROK 1 UH +-10%(2012)0.4 OHM;50MA MAX;(MAX ECHO) (ROHS) Ref. ASSY 023-25040-110 AC CORD SET 770MM UL/CUL 1 APP.NISPT-2/60'"8"+ POLA.PLG; Description QTY 006-72105-350 CERAMIC CHIP CAP 1 UF +-...) (ROHS) X7R 009-70106-416- No L1 L6,7 L10 L4,5 L8,9 L3 FB1,2,3,4,5 X1 PARTS LIST 14 Parts No. Y3419 FUNCTION BUTTON 1 0974-V (INJECTION MNC7-0) (ABS V0) (SP.SILVER SS9-1)(ROHS) U04 Y3419-STD-13- ROHS...
...ACM201209A301 5 300 OHM +-25%(2012)0.05 OHM DCR;3A MAX. (MAXECHO); Y3419 100~240V "MEMOREX" 1 320 UL APP. A077N2180103AB*YC; No 100,102,104,108,112,114, 116,124,125... 1 1ROK 1 UH +-10%(2012)0.4 OHM;50MA MAX;(MAX ECHO) (ROHS) Ref. ASSY 023-25040-110 AC CORD SET 770MM UL/CUL 1 APP.NISPT-2/60'"8"+ POLA.PLG; Description QTY 006-72105-350 CERAMIC CHIP CAP 1 UF +-...) (ROHS) X7R 009-70106-416- No L1 L6,7 L10 L4,5 L8,9 L3 FB1,2,3,4,5 X1 PARTS LIST 14 Parts No. Y3419 FUNCTION BUTTON 1 0974-V (INJECTION MNC7-0) (ABS V0) (SP.SILVER SS9-1)(ROHS) U04 Y3419-STD-13- ROHS...
Service Manual
Page 15
...R1050-06) (ROHS) Y3719-C-0320 Y3719 "MEMOREX" COSMETIC 1 ASSY SP.MATT.BLACK 101-37190- Y3719 FOOT STAND 1 V (INJECTION BLK/ABS V0) (SP.MATT.BLACK) (ROHS) 138-37191-040- No CN71 TO CN5 PARTS LIST 15 Parts No. Description QTY LACK*5) (CHUNGLING:TC- ...RED*1/B Ref. Y3719 TV CASING ASSY (UL) 1 CASING-UL-02 (CMO DISPLAY) 029-12608-806 58*126MM SPEAKER 8 2 OHM;NOM 3W;MAX 5W(SAMCO 5712D3F16) (ROHS) 049-01906-005 TFT DISPLAY M190A1-L02 1 (CHI MEI);ROHS (19" WIDE TFT LCD DISPLAY MODULE;4CCFL) 125-31191-000 Y3119 JACK COVER 1 PLATE_UL (W/O SK.) (BLACK PVC;T=1MM) (NO DVD...
...R1050-06) (ROHS) Y3719-C-0320 Y3719 "MEMOREX" COSMETIC 1 ASSY SP.MATT.BLACK 101-37190- Y3719 FOOT STAND 1 V (INJECTION BLK/ABS V0) (SP.MATT.BLACK) (ROHS) 138-37191-040- No CN71 TO CN5 PARTS LIST 15 Parts No. Description QTY LACK*5) (CHUNGLING:TC- ...RED*1/B Ref. Y3719 TV CASING ASSY (UL) 1 CASING-UL-02 (CMO DISPLAY) 029-12608-806 58*126MM SPEAKER 8 2 OHM;NOM 3W;MAX 5W(SAMCO 5712D3F16) (ROHS) 049-01906-005 TFT DISPLAY M190A1-L02 1 (CHI MEI);ROHS (19" WIDE TFT LCD DISPLAY MODULE;4CCFL) 125-31191-000 Y3119 JACK COVER 1 PLATE_UL (W/O SK.) (BLACK PVC;T=1MM) (NO DVD...
Service Manual
Page 16
... "MEMOREX MLT1912" 1 4 PACKING ASSY(TARGET DI)(SUFFIX B) W/DPC LABEL FOR LCD MTG BKT TO 144-53008-212 SCREW 3X8 STB (TB) BLACK 45 FRONT CAB. * 14 (N89-3008-45) (TAPTITE- SCREW 4*8 RM WHITE ZINC 2 001 (ROHS) FOR FOOT ASSY 144-47026-722- No Parts No. SCREW 3*12 STB (TB) (WHITE 4...-53004-222- Ref. SCREW 3*4 STB (TB) WHITE 12 COVER * 10 001 ZINC (ROHS) PARTS LIST PARTS LIST 16 Ref. Y3119 HINGE 'R' (IRON 1 100 T=2MM)(ROHS) U32 FOR FOOT ASSY 139-31191-120- Y3419 WALL MOUND 1 V ADAPTOR (ROHS) U11 (INJECTION BALCK/ABS V0) 133-31191-120 Y3119 WALL MOUNT PLATE 1 (IRON ...
... "MEMOREX MLT1912" 1 4 PACKING ASSY(TARGET DI)(SUFFIX B) W/DPC LABEL FOR LCD MTG BKT TO 144-53008-212 SCREW 3X8 STB (TB) BLACK 45 FRONT CAB. * 14 (N89-3008-45) (TAPTITE- SCREW 4*8 RM WHITE ZINC 2 001 (ROHS) FOR FOOT ASSY 144-47026-722- No Parts No. SCREW 3*12 STB (TB) (WHITE 4...-53004-222- Ref. SCREW 3*4 STB (TB) WHITE 12 COVER * 10 001 ZINC (ROHS) PARTS LIST PARTS LIST 16 Ref. Y3119 HINGE 'R' (IRON 1 100 T=2MM)(ROHS) U32 FOR FOOT ASSY 139-31191-120- Y3419 WALL MOUND 1 V ADAPTOR (ROHS) U11 (INJECTION BALCK/ABS V0) 133-31191-120 Y3119 WALL MOUNT PLATE 1 (IRON ...
Service Manual
Page 17
No Parts No. Ref. Description FOR REAR CABINET TO LCD MTG BKT * 2 FOR LCD/BKT 18CM 142-11505-221 FELT (220*15*0.5)MM W/ONE FOR LCD BKT 11CM SIDE TAPE;ROHS FOR LCD BKT 11CM FOR JACK SHIELD COVER 22CM FOR SPEAKER TO LCD/BKT 44CM QTY 5 PARTS LIST
No Parts No. Ref. Description FOR REAR CABINET TO LCD MTG BKT * 2 FOR LCD/BKT 18CM 142-11505-221 FELT (220*15*0.5)MM W/ONE FOR LCD BKT 11CM SIDE TAPE;ROHS FOR LCD BKT 11CM FOR JACK SHIELD COVER 22CM FOR SPEAKER TO LCD/BKT 44CM QTY 5 PARTS LIST
