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SUPPLEMENT SERVICE MANUAL This service manual shows only the differences between the model WF15L5 and the original model 6615LF4. All other information is described in the service manual of the model 6615LF4. 15″ COLOR LCD TELEVISION WF15L5 TABLE OF CONTENTS Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic Diagrams / CBA's and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Different parts from the original model (6615LF4). . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2-1 3-1 4-1 5-1 1-1 NO PART MOUNTED FOR CN112 (NO CONNECTION) SCL SDA BUS-OPEN WP 7 SDA 5 SCL 6 IC171 (MEMORY) CN112 1 2 4 BUS-OPEN BACKLIGHT-SW BACKLIGHT-ADJ P-ON-H P-ON-H2 INPUT-0 INPUT-1 S-SW SCL SDA AFT-IN VOLUME AUDIO-MUTE TUNERCLK 23 22 17 18 16 31 32 19 40 41 5 20 35 80 P-25V-ON 12 XIN 42 XOUT 43 RESET 21 KEY-IN-2 4 KEY-IN-1 3 REMOTE 11 IC333 (TV MICRO CONTROLLER) Q131 3.3V<-->5V CONVERTER Q301 BUFFER TO POWER SUPPLY BLOCK DIAGRAM P-ON+3.3V(D) BACKLIGHT-SW BACKLIGHT-ADJ P-ON-H P-ON-H2 INPUT-0 INPUT-1 S-SW SCL SDA AFT-IN VOLUME AUDIO-MUTE CN102A 5 3 8 10 12 13 17 18 19 14 9 11 MAIN CBA CN103B CN103A 1 FSC 23 5 BUS-OPEN 19 CN102B 19 21 16 14 12 11 7 6 5 10 15 13 LCD MAIN CBA UNIT P-25V-ON X161 27MHz RESET Q151 REMOTE SENSOR RCV101 KEY SWITCH KEY SWITCH (NO CONNECTION) SCL SDA CN113 IS USED BUS-OPEN FOR ADJUSTMENT AT FACTORY TO AUDIO BLOCK DIAGRAM TO IF/VIDEO BLOCK DIAGRAM TO POWER SUPPLY BLOCK DIAGRAM TO LCD BACKLIGHT BLOCK DIAGRAM FUNCTION CBA CLN104 1 2 6 CN113 1 2 4 P-ON-H VOLUME AUDIO-MUTE SCL SDA INPUT-0 INPUT-1 S-SW SCL SDA AFT-IN FSC P-ON-H P-ON-H2 BACKLIGHT-SW BACKLIGHT-ADJ CN104 1 KEY-IN-2 2 KEY-IN-1 6 REMOTE System Control Block Diagram BLOCK DIAGRAMS L3120BLS 1-2 JK701 S-VIDEO IN JK703 VIDEO1 -IN TO SYSTEM CONTROL BLOCK DIAGRAM C S-SW FSC SCL SDA AGC XTAL-IN SCL SDA Y 1 5 2 3 IF 7 TU1 (TUNER UNIT) SAW FILTER SF11 VIF AMP RF AGC AMP 14 11 AFT VCO VIDEO DET (IF SIGNAL PROCESS) 16 17 IC31 1 INPUT-1(INV) 11 WF9 WF7 WF8 CN103A 11 CVBS 7 S-VIDEO-C 9 S-VIDEO-Y TO SYSTEM CONTROL BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM AUDIO SIGNAL TO AUDIO BLOCK DIAGRAM BUFFER Q701 BUFFER Q702 BUFFER Q703 INPUT-0(INV) 10 15 14 4 AFT-IN SIF Q708 9 SW CONTROL IC781 (INPUT SELECT) 18 13 8 Q707 2 1 12 13 5 3 SIF AMP INPUT-1 BUFFER Q32 7 INPUT-0 EQ AMP SIF TRAP 4.5MHz FILTER TO SYSTEM CONTROL BLOCK DIAGRAM 2 DEFEAT IF AGC DET 4 CF31 MAIN CBA VIDEO SIGNAL TO LCD BLOCK DIAGRAM CN103B IF/Video Block Diagram L3120BLIF 1-3 JK705 AUDIO1(R) -IN JK704 AUDIO1(L) -IN TO IF/VIDEO BLOCK DIAGRAM MAIN CBA SIF 24 27 21 INPUT VCA I2C DECORDER SIF DEMOD 9 10 SW CTL (R-CH) (L-CH) TUNER AUDIO1 TUNER 4 AUDIO1 2 1 5 11 15 12 14 SAP FILTER STEREO FILTER 3 13 IC852 (INPUT SELECT) SIF/BB SW IC851 (MTS/SAP AUDIO SIGNAL PROCESS) SAP DEMOD OFFSET CANCEL 1 14 6 (R-CH) (L-CH) +5V 2 MUTE /STANDBY CONTROL (L-R)/SAP SW 75uS DE-EMPH IC801 (AUDIO AMP) SAP OUT FILTER L-R FILTER L+R FILTER 7 5 Q803 RF Q802 AMP 14 11 SPECTRAL RMS DET SPECTRAL EXPAND WIDE BAND RMS DET VOLUME AMP SPECTRAL FILTER dBX DE-EMPH WIDE BAND FILTER INPUT-0(INV) INPUT-1(INV) P-ON-H AUDIO-MUTE VOLUME SCL SDA WF6 WIDE BAND EXPAND SP801 SPEAKER R-CH JK801 HEADPHONE JACK CLN801 CN801 SP-R 1 GND 2 TO IF/VIDEO BLOCK DIAGRAM R-CH L-CH SP802 SPEAKER L-CH AGC CN802 CLN802 SP-L 1 GND 2 MATRIX TO SYSTEM CONTROL BLOCK OFFSET CANCEL OFFSET CANCEL 29 30 AUDIO SIGNAL Audio Block Diagram L3120BLA TO IF/VIDEO BLOCK DIAGRAM CN103A CN103B CVBS 13 S-VIDEO-C 17 S-VIDEO-Y 15 C Y 71 VIDEO SIGNAL PROCESS CVBS 49 68 B G R IC333 (LCD DRIVE / SIGNAL PROCESS) A/D A/D A/D B G R LCD RGB SIGNAL PROCESS 1-4 B(EVEN) G(EVEN) R(EVEN) B(ODD) G(ODD) R(ODD) 144 143 139 R394 172 173 174 WF2 R392 WF1 WF5 R202 WF3 R201 WF4 CN311 7 10 13 42 43 44 HMS1-E CLKH HMS1-0 STH1 POL LP EG(0) EG(1) EG(2) EG(3) EG(4) EG(5) EB(0) EB(1) EB(2) EB(3) EB(4) EB(5) OFFEV STV1 CLKV CN312 50 49 48 47 46 45 43 42 41 40 39 38 12 13 14 128 127 126 125 118 117 116 115 114 113 108 107 OFFEV 101 STV1 105 CLKV 106 ODDINV CLKH1 EVENINV STH-1 POL LP OR(0) OR(1) OR(2) OR(3) OR(4) OR(5) OG(0) OG(1) OG(2) OG(3) OG(4) OG(5) OB(0) OB(1) OB(2) OB(3) OB(4) OB(5) ER(0) ER(1) ER(2) ER(3) ER(4) ER(5) CN311 34 33 32 31 30 29 27 26 25 24 23 22 20 19 18 17 16 15 6 5 4 3 2 1 170 169 166 165 164 163 162 161 157 156 155 154 153 152 148 147 146 145 138 137 136 135 130 129 R365 LCD MAIN CBA UNIT VIDEO SIGNAL LCD MODULE LCD Block Diagram L3120BLLCD SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the mark “#” in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, or other hazards. Notes: 1. Do not use the part number shown on these drawings for ordering. The correct part number is shown in the parts list, and may be slightly different or amended since these drawings were prepared. 2. All resistance values are indicated in ohms (K = 103, M = 106). 3. Resistor wattages are 1/4W or 1/6W unless otherwise specified. 4. All capacitance values are indicated in µF (P = 10-6 µF). 5. All voltages are DC voltages unless otherwise specified. Note of Capacitors: ML --- Mylar Cap. PP --- Metallized Film Cap. SC --- Semiconductor Cap. L --- Low Leakage type Temperature Characteristics of Capacitors are noted with the following: B --- ±10% CH --- 0±60 ppm/°C CSL --- +350~-1000 ppm/°C Tolerance of Capacitors are noted with the following: Z --- +80~-20% Note of Resistors: CEM --- Cement Res. MTL --- Metal Res. F --- Fuse Res. Capacitors and transistors are represented by the following symbols. CBA Symbols Schematic Diagram Symbols (Top View) (Bottom View) + Electrolytic Capacitor Digital Transistor (Bottom View) Transistor or Digital Transistor E C B (Top View) (Top View) NPN Transistor PNP Transistor ECB ECB (Top View) (Top View) PNP Digital Transistor NPN Digital Transistor ECB ECB 2-1 LC2N_SC LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. 3. Note: 1. Do not use the part number shown on the drawings for ordering. The correct part number is shown in the parts list, and may be slightly different or amended since the drawings were prepared. 2. To maintain original function and reliability of repaired units, use only original replacement parts which are listed with their part numbers in the parts list section of the service manual. 4. Voltage indications on the schematics are as shown below: Plug the TV power cord into a standard AC outlet.: 1 (Unit: Volt) 2 3 5.0 (3.0) Voltage 5.0 (3.0) Power on mode Power off mode Indicates that the voltage is not consistent here. 5. How to read converged lines 1-D3 3 Distinction Area Line Number (1 to 3 digits) AREA D3 2 Examples: 1. "1-D3" means that line number "1" goes to the line number 1 "1" of the area "D3". 2. "1-B1" means that line number "1" goes to the line number "1" of the area "B1". 1-B1 AREA B1 1-D3 A B C D 6. Test Point Information : Indicates a test point with a jumper wire across a hole in the PCB. : Used to indicate a test point with a component lead on foil side. : Used to indicate a test point with no test pin. : Used to indicate a test point with a test pin. 2-2 LC2N_SC Main 1/5 Schematic Diagram MAIN 1/5 Ref No. Position ICS D-4 IC531 E-3 IC533 E-2 IC671 E-2 IC672 TRANSISTORS Q501 C-4 Q502 C-4 Q503 B-3 Q505 C-3 Q509 C-3 Q510 B-2 Q511 C-3 Q512 C-2 Q513 C-2 Q531 D-3 Q633 E-1 CONNECTORS CN101A A-4 CN102A A-3 2-3 L3120SCM1 Main 2/5 Schematic Diagram MAIN 2/5 Ref No. Position ICS IC31 I-1 IC851 H-3 IC852 J-4 TRANSISTOR Q32 J-2 CONNECTOR CN113 G-1 2-4 L3120SCM2 Main 3/5 Schematic Diagram MAIN 3/5 Ref No. Position ICS P-3 IC781 N-2 IC801 TRANSISTORS N-3 Q701 N-3 Q702 Q703 N-3 Q704 P-1 Q705 O-1 Q706 P-1 Q707 P-2 P-2 Q708 O-1 Q802 N-1 Q803 CONNECTORS M-4 CN801 CN802 M-3 CN103A M-2 2-5 L3120SCM3 Main 4/5 Schematic Diagram CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. 4A/125V CAUTION ! : For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V. NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. MAIN 4/5 Ref No. Position IC U-1 IC601 TRANSISTORS Q601 S-2 T-2 Q603 Q661 W-2 TESTPOINT TP402 X-4 2-6 L3120SCM4 Main 5/5 Schematic Diagram MAIN5/5 Ref No. Position TRANSISTORS Q401 AA-2 Q403 Z-2 Q404 Z-3 Q405 AA-2 Q406 AA-2 Q407 Z-3 Q408 Z-4 Q409 Z-2 Q410 Z-3 Q411 AA-3 Q412 AA-3 Q415 AA-1 Q416 AA-1 Q421 AC-4 Q422 AC-3 Q423 AC-2 Q424 AB-1 Q427 AA-3 Q428 AA-2 CONNECTORS AD-4 CN402 AD-2 CN403 TESTPOINT TP403 Z-3 2-7 L3120SCM5 Function Schematic Diagram 2-8 L3120SCF LCD Main 1/2 Schematic Diagram LCD MAIN 1/2 Ref No. Position IC B-3 IC333 TRANSISTOR D-1 Q301 CONNECTORS A-3 CN104 A-2 CN105 A-2 CN111 F-4 CN211 CN311 F-4 CN102B A-4 2-9 L3120SCL1 LCD Main 2/2 Schematic Diagram LCD MAIN 2/2 Ref No. Position ICS IC151 I-3 J-3 IC171 H-2 IC191 H-1 IC192 H-2 IC193 IC201 J-1 TRANSISTORS I-4 Q131 Q201 J-1 CONNECTORS L-4 CN112 L-3 CN312 L-4 CN101B CN103B G-2 2-10 L3120SCL2 WAVEFORMS WF1 ~ WF9 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) CLKH WF1 1DIV: 1.0V 10 s R392 CLKV WF2 1DIV: 1.0V 20ns R365 POL WF3 1DIV: 1.0V 20 s R202 LP CVBS WF4 1DIV: 1.0V 10 s R201 STH1 WF7 1DIV: 200mV 20 s Pin 11 of CN103A S-VIDEO-Y WF5 1DIV: 1.0V 10 s R394 AUDIO WF8 1DIV: 200mV 20 s Pin 9 of CN103A S-VIDEO-C WF6 1DIV: 100mV 400 s Pin 14 of IC801 3-1 WF9 1DIV: 200mV 20 s Pin 7 of CN103A L3120WF GND NU V-COM V-COM NU VDDG(+25V) NU VDDD(+3.3V) NU VEEG(-6V) NU OFFEV STV1 CLKV XAO GND NU NU NU NU GND VREF(9) VREF(8) VREF(7) VREF(6) VREF(5) GND VREF(4) VREF(3) VREF(2) VREF(1) VREF(0) VDDA(+10.8V) VDDA(+10.8V) V-COM V-COM GND EB(5) EB(4) EB(3) EB(2) EB(1) EB(0) GND EG(5) EG(4) EG(3) EG(2) EG(1) EG(0) CN312 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 4-1 ER(5) ER(4) ER(3) ER(2) ER(1) ER(0) HMS1-E GND GND CLKH GND GND HMS1-0 GND OB(5) OB(4) OB(3) OB(2) OB(1) OB(0) GND OG(5) OG(4) OG(3) OG(2) OG(1) OG(0) GND OR(5) OR(4) OR(3) OR(2) OR(1) OR(0) GND GND VDDD(+3.3V) VDDD(+3.3V) VDDD(+3.3V) VDDD(+3.3V) GND STH1 POL LP GND LCD MODULE CN311 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 CN402 1 2 CN403 1 2 BACK LIGHT BACK LIGHT S-VIDEO OUT IN CN802 1 SP-L 2 GND CN801 1 SP-R 2 GND VIDEO1 -IN AUDIO1 (R)-IN TU1 TUNER UNIT CN113 IS USED FOR ADJUSTMENT AT FACTORY CN113 (NO CONNECTION) 1 SCL 2 SDA 3 GND 4 BUS-OPEN CLN802 SP802 SPEAKER AC601 AC CORD CLN801 SP801 SPEAKER LCD MAIN CBA AUDIO1 (L)-IN MAIN CBA CN102B NU GND BACKLIGHT-ADJ GND BACKLIGHT-SW NU NU P-ON-H VOLUME P-ON-H2 AUDIO-MUTE INPUT-0 INPUT-1 AFT-IN PROTECT-1 PROTECT-2 S-SW SCL SDA GND P-25V-ON AL+5V GND 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 FUNCTION CBA CN102A NU GND BACKLIGHT-ADJ GND BACKLIGHT-SW NU NU P-ON-H VOLUME P-ON-H2 AUDIO-MUTE INPUT-0 INPUT-1 AFT-IN PROTECT-1 PROTECT-2 S-SW SCL SDA GND P-25V-ON AL+5V GND CLN104 KEY-IN-2 KEY-IN-1 AL+3.3V GND NU REMOTE NU NU CN101A NU NU GND PANEL+3.3V PANEL+10.8V GND PANEL+25V PANEL-6V GND CN103A NU GND NU GND NU GND S-VIDEO-C GND S-VIDEO-Y GND CVBS GND NU NU AL+3.3V(A) GND NU DVD-MAIN-POWER(NU) BUS-OPEN GND AL+7V(D) GND FSC 1 2 3 4 5 6 7 8 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 CN104 KEY-IN-2 KEY-IN-1 AL+3.3V GND NU REMOTE NU NU CN101B NU NU GND PANEL+3.3V PANEL+10.8V GND PANEL+25V PANEL-6V GND CN103B NU GND NU GND NU GND S-VIDEO-C GND S-VIDEO-Y GND CVBS GND NU NU AL+3.3V(A) GND NU DVD-MAIN-POWER(NU) BUS-OPEN GND AL+7V(D) GND FSC WIRING DIAGRAM L3120WI Different parts from the original model (6615LF4) Ref. No. Description Ref. No. Part No. Q705 MECHANICAL PARTS A1 FRONT CABINET L0200UA 1EM020010C A2 Not used A3 CONTROL PLATE L3120UL 1EM320480 A4 REAR CABINET L3120UL 1EM120388 A6# RATING LABEL L3120UL ---------- B4 JACK HOLDER L3120UL 1EM320461 S1 CARTON L3120UL 1EM421264 S2 STYROFOAM TOP L3100UA 1EM020146A S3 STYROFOAM BOTTOM L3100UA 1EM020147A S6 LABEL EAS(H3761UD) MAKER NO.ZLLFNSLE1 ---------- X2# OWNERS MANUAL L3120UL Description Part No. Not used Q706 Not used R140 Not used R143 Not used R145 Not used R164 Not used R165 Not used R167 Not used R189 CHIP RES.(1608) 1/10W J 10k Ω RRXAJR5Z0103 R190 CHIP RES.(1608) 1/10W J 100 Ω RRXAJR5Z0101 R192 CHIP RES.(1608) 1/10W F 240 Ω RRXAFR5H2400 R193 CHIP RES. 1/10W F 1.2k Ω RRXAFR5H1201 1EMN20510A R195 CHIP RES.(1608) 1/10W J 1k Ω RRXAJR5Z0102 NE903UD R196 CHIP RES. 1/10W F 3.0k Ω RRXAFR5Z3001 R197 CHIP RES. 1/10W F 1.8k Ω RRXAFR5Z1801 R732 Not used R733 Not used R734 Not used R735 Not used R736 Not used R738 Not used R739 Not used R740 Not used R741 Not used R742 Not used R743 Not used R744 Not used R747 Not used Not used R748 Not used Not used R749 Not used Not used R752 Not used Not used R755 Not used Not used R756 Not used Not used R757 Not used Not used R758 Not used Not used R759 Not used Not used R820 Not used Not used R821 Not used Not used R826 Not used ZENER DIODE EDZTE61 4.7B R827 Not used Not used R831 Not used Not used R832 Not used Not used R833 Not used IC191 VOLTAGE REGULATOR PQ1LAX95MSPQ QSZBA0TSH053 R834 Not used IC192 VOLTAGE REGULATOR LD1117SC-R NSZBA0TSS229 IC333 DIGITAL VIDEO PROCESSOR R8A01014A92FP QSZAA0RHT070 JK706 Not used JK707 Not used JK708 Not used JK709 Not used X3 REMOCON UNIT 170/ECNLC301/ NE903UD ELECTRICAL PARTS LCD MAIN CBA & LIQUID CRYSTAL PANEL UNIT MMA CBA 1ESA11081 MAIN CBA ---------- C158 Not used C162 CHIP CERAMIC CAP. CH J 11pF/ 50V C177 C178 C190 C331 C722 C726 C730 C734 C735 C736 C751 C752 C753 C754 D191 D701 D702 D703 1FSA10070 CHD1JJ3CH110 CHIP CERAMIC CAP.(1608) CH J 68pF/50V CHD1JJ3CH680 CHIP CERAMIC CAP.(1608) CH J 68pF/50V CHD1JJ3CH680 CHIP ELECTROLYTIC CAP. 47µF/ 10V CA1A470SP062 JK710 Not used Q704 Not used QD1B00EDZ4R7 5-1 L3120PL WF15L5 L3120UL 2005-06-25