FUNAI F20LCTE Service Manual Download Page 41 | Manualshive

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WAVEFORMS

L0305WF

8-1

1DIV: 1.0V 10 s

1DIV: 1.0V 20 s

WF1

1DIV: 1.0V 10 s

WF5

Input: NTSC Color Bar Signal (with 1kHz Audio Signal)

WF1 ~ WF12 = Waveforms to be observed at

Waveform check points.
(Shown in Schematic Diagram.)

1DIV: 1.0V 20ns
R365

WF2

Pin 49 of CN310A

WF3

1DIV: 200mV 20 s
Pin 23 of CN103A

WF7

1DIV: 200mV 20 s
Pin 21 of CN103A

WF8

1DIV: 100mV 400 s
Pin 14 of IC801

WF6

1DIV: 1.0V 10 s
Pin 50 of CN310A

WF4

1DIV: 200mV 20 s
Pin 19 of CN103A

WF9

1DIV: 200mV 20 s
Q704 Emitter

WF10

1DIV: 200mV 20 s
Q705 Emitter

WF11

1DIV: 200mV 20 s
Q706 Emitter

WF12

Pin 5 of CN310A

Pin 48 of CN310A

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Summary of Contents for F20LCTE

Page 1: ...20 COLOR LCD TELEVISION F20LCTE SERVICE MANUAL...

Page 2: ...or of the possible hazardous consequences of each way Consequently Funai has not undertaken any such broad evaluation Accordingly a servicer who uses a service proce dure or tool which is not recommen...

Page 3: ...it Nominal Limit 1 Intermediate Freq Picture Sound MHz MHz 45 75 41 25 2 Color Killer Sens CH 2 CH 10 CH 55 dB V dB V dB V 15 15 15 20 20 20 3 AFT Pull In Range 10mV input MHz 2 1 0 7 Description Cond...

Page 4: ...gs tied together and touch the other ohmme ter lead in turn to each tuner antenna input ex posed terminal screw and if applicable to the coaxial connector If the measured resistance is less than 1 0 m...

Page 5: ...he ground side of the AC power source To confirm that the AC power plug is inserted correctly with an AC volt meter measure between the chassis and a known earth ground If a voltage reading in excess...

Page 6: ...eplaced wires do not contact sharp edged or pointed parts H When a power cord has been replaced check that 5 6 kg of force in any direction will not loosen it I Also check areas surrounding repaired l...

Page 7: ...exposed accessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc is lower than or equal to the specified value in the table below...

Page 8: ...he Flat Pack IC about 5 to 6 seconds Fig S 1 1 2 Remove the flat pack IC with tweezers while ap plying the hot air 3 Bottom of the flat pack IC is fixed with glue to the CBA when removing entire flat...

Page 9: ...emoving entire flat pack IC first apply soldering iron to center of the flat pack IC and heat up Then remove glue will be melted Fig S 1 6 4 Release the flat pack IC from the CBA using twee zers Fig S...

Page 10: ...tallation 1 Using desoldering braid remove the solder from the foil of each pin of the flat pack IC on the CBA so you can install a replacement flat pack IC more easily 2 The I mark on the flat pack I...

Page 11: ...d to remove any static electricity that may be charged on the body 2 Ground for Workbench Be sure to place a conductive sheet or copper plate with proper grounding 1M on the workbench or other surface...

Page 12: ...ol der 2 S 2 two screws S 2 5 Refer to the following Reference Notes in the Table ID LOC No PART REMOVAL Fig No REMOVE UNHOOK UNLOCK RELEASE UNPLUG DESOLDER Note 1 Rear Cabinet D1 11 S 1 S 2 2 Jack Ho...

Page 13: ...4 2 L0305DC S 1 S 1 S 1 S 1 S 1 S 1 S 2 1 Rear Cabinet Fig D1...

Page 14: ...aker L 13 Speaker R 14 Front Cabinet Fig D2 S 10 S 11 S 15 S 15 S 12 S 3 S 3 S 5 S 5 S 5 S 7 S 7 S 9 S 8 S 8 S 8 S 8 W 1 S 8 S 9 S 9 S 9 S 7 S 5 S 6 S 6 S 6 S 5 S 4 S 13 S 14 S 14 2 Jack Holder 3 Main...

Page 15: ...N53 IR Sensor CBA Inverter CBA Main CBA LED A CBA LCD Main CBA Unit To Speaker To Speaker CN103A CN101B CN102B CN103B CN312A CN311A CN310A CN81 CN801 CLN481 CN481 CN460 CN470 CN480 CN430 CN440 CN450 C...

Page 16: ...e back lid Fig 1 1 2 Add J1 Jumper Wire to the remote control CBA Fig 1 2 How to set up the service mode Service mode 1 Use the service remote control unit 2 Turn the power on Use main power on the TV...

Page 17: ...n on the remote control unit NORMAL 0 74 DARK 150 SAIDO 5 128 C SAIDO 188 D2 SAIDO 128 D3 SAIDO 208 H P 8 50 C H P 50 V P 9 40 C V P 40 COR C D1 VOL p 1 512 COG C D1 VOL p 2 512 COB C D1 VOL p 3 512 D...

Page 18: ...o the CHROMA mode and bring the optical receptor to the center on the LCD Panel surface after zero point calibration as shown above Note The optical receptor must be set perpendicu larly to the LCD Pa...

Page 19: ...ACKLIGHT SW BACKLIGHT ADJ P ON H PROTECT 1 PROTECT 2 VOLUME A MUTE SDA SCL INPUT 0 INPUT 1 S SW SCL SDA 7 20 35 31 40 19 32 41 42 43 X161 27MHz XIN XOUT TO POWER SUPPLY BLOCK DIAGRAM TO IF VIDEO BLOCK...

Page 20: ...TO AUDIO BLOCK DIAGRAM JK706 VIDEO Y IN JK707 VIDEO Pb IN JK708 VIDEO Pr IN JK703 VIDEO1 IN JK701 S VIDEO IN IF AGC DET EQ AMP SIF AMP 2 1 7 8 BUFFER Q709 SDA TO SYSTEM CONTROL BLOCK DIAGRAM SCL S SW...

Page 21: ...AP SW SAP FILTER I2C DECORDER SAP DEMOD SAP OUT FILTER 29 30 TO IF VIDEO BLOCK DIAGRAM TUNER AUDIO1 AUDIO2 TUNER AUDIO1 AUDIO2 L CH R CH 21 27 24 IC851 MTS SAP AUDIO SIGNAL PROCESS AUDIO1 L IN JK704 S...

Page 22: ...46 145 138 137 136 135 130 129 128 127 126 125 118 117 116 115 114 113 108 107 101 A D VIDEO SIGNAL PROCESS LCD RGB SIGNAL PROCESS R B G Y Pb Cb Pr Cr B EVEN G EVEN R EVEN B ODD G ODD R ODD CN311A A D...

Page 23: ...ore you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail 5 3 2 PANEL 25V 7 3 PANEL 13 9V 5 5 PANEL 6V 3 7 PANEL 25V PANEL 13 9V Q51...

Page 24: ...9 7 T450 SW SW CTL Q431 432 Q411 Q463 Q464 BACK LIGHT 1 2 CN470 BACK LIGHT 1 2 CN480 BACK LIGHT 1 2 CN430 BACK LIGHT 1 2 CN440 BACK LIGHT 1 2 CN450 BACK LIGHT Q465 Q466 Q433 Q434 Q435 Q436 26 27 23 24...

Page 25: ...wings 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...

Page 26: ...ired units use only original replacement parts which are listed with their part numbers in the parts list section of the service manual 4 Wire Connectors 1 Prefix symbol CN means connector can disconn...

Page 27: ...Ref No Position IC502 E 3 IC503 D 3 IC504 E 2 IC505 D 3 Q51 A 1 Q80 B 4 Q81 B 2 Q82 B 2 Q83 B 2 Q501 C 3 Q502 C 3 Q503 C 2 Q504 C 2 Q505 C 2 Q506 C 2 Q507 D 2 Q508 D 1 Q509 C 2 Q510 C 1 Q511 D 3 Q512...

Page 28: ...I3 I4 J1 J2 J3 J4 K1 K2 K3 K4 L1 L2 L3 L4 VIDEO SIGNAL AUDIO SIGNAL 7 5 7 6 L0305SCM2 Main 2 4 Schematic Diagram MAIN 2 4 Ref No Position IC11 I 1 IC851 G 3 IC852 I 3 IC871 J 4 Q31 G 2 Q709 J 2 TP300...

Page 29: ...VIDEO SIGNAL AUDIO SIGNAL Main 3 4 Schematic Diagram L0305SCM3 7 7 7 8 MAIN 3 4 Ref No Position IC781 O 3 IC801 N 2 Q701 N 3 Q702 N 3 Q703 N 3 Q704 P 1 Q705 O 1 Q706 P 1 Q707 P 2 Q708 P 2 Q791 P 4 Q80...

Page 30: ...ME TYPE DE 4A 125V 4A 125V 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 c...

Page 31: ...ter Schematic Diagram INVERTER Ref No Position IC401 H 3 Q403 H 1 Q405 H 1 Q411 H 3 Q412 G 3 Q431 I 2 Q432 I 2 Q433 K 2 Q434 K 2 Q435 K 1 Q436 K 1 Q461 I 3 Q462 I 4 Q463 K 3 Q464 K 3 Q465 K 3 Q466 K 3...

Page 32: ...A1 A2 B1 B2 C1 C2 Function Schematic Diagram L0305SCF 7 13 7 14...

Page 33: ...A1 A2 B1 B2 C1 C2 7 15 7 16 L0305SCIR IR Sensor Schematic Diagram...

Page 34: ...A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 E1 E2 E3 E4 F1 F2 F3 F4 VIDEO SIGNAL LCD Main 1 3 Schematic Diagram 7 17 7 18 L0305SCLCD1 LCD 1 3 Ref No Position IC333 B 3 CN102B A 2 CN310A A 4 CN311A F 4 IC C...

Page 35: ...L3 L4 VIDEO SIGNAL LCD Main 2 3 Schematic Diagram 7 19 7 20 L0305SCLCD2 LCD 2 3 Ref No Position IC151 H 4 IC171 I 3 Q101 K 4 Q102 J 4 Q103 J 4 Q104 J 4 Q105 J 3 Q106 K 3 Q107 K 3 Q108 J 2 Q109 J 1 Q1...

Page 36: ...P3 P4 Q1 Q2 Q3 Q4 R1 R2 R3 R4 LCD Main 3 3 Schematic Diagram 7 21 7 22 L0305SCLCD3 LCD 3 3 Ref No Position IC201 P 2 IC202 N 4 IC203 N 3 IC204 N 1 IC205 N 2 Q201 Q 2 CN101B M 1 CN312A R 4 VR201 P 3 IC...

Page 37: ...he voltage for parts in hot circuit is measured using hot GND as a common terminal CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE 4A 125V FUSE ATTENTION UTILISER UN...

Page 38: ...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 suppl...

Page 39: ...n CBA Top View Function CBA Bottom View BL0300F01011 2 7 27 7 28 IR Sensor CBA Top Bottom View LED A CBA Top Bottom View LED B CBA Top Bottom View BL0300F01011 3 BL0300F01011 4 BL0300F01011 5 BL0300F0...

Page 40: ...o Position IC401 C 2 Q403 C 1 Q405 B 1 Q411 C 1 Q412 C 2 Q431 B 1 Q432 B 1 Q433 B 2 Q434 B 2 Q435 B 2 Q436 B 2 Q461 D 1 Q462 D 1 Q463 D 2 Q464 D 2 Q465 D 2 Q466 D 2 CN430 A 2 CN440 A 1 CN450 A 1 CN460...

Page 41: ...wn in Schematic Diagram 1DIV 1 0V 20ns R365 WF2 Pin 49 of CN310A WF3 1DIV 200mV 20 s Pin 23 of CN103A WF7 1DIV 200mV 20 s Pin 21 of CN103A WF8 1DIV 100mV 400 s Pin 14 of IC801 WF6 1DIV 1 0V 10 s Pin 5...

Page 42: ...ND FUNCTION CBA BL0300F01011 2 5 GND 1 3 CN53 4 2 RCV IN LED 5V P ON L GND 5 GND 1 3 4 2 CLN53 RCV IN LED 5V P ON L GND INVERTER CBA BL0300F01021 1 5 3 CN481 2 4 6 21V GND 21V 21V GND GND 9 7 8 10 BAC...

Page 43: ...3 L3 L3 L3 L3 L3 L3 L17 L9 L3 L2 L2 L2 L2 L2 L2 L18 L7 L3 B4 A9 A6 A4 B29 L1 L1 L1 L5 A7 B6 B6 A10 B5 B5 B3 L19 B6 B6 B17 B17 B18 L11 See Electrical Parts List for parts with this mark SP804 SP802 SP8...

Page 44: ...10 3 L0305PEX Packing S1 FRONT S2 S5 S4 Tape Tape Packing Tape Packing Tape Packing Tape S3 X1 X5 X3 X6 Some Ref Numbers are not in sequence X2...

Page 45: ...CLOTH 10X190XT0 3 1EM420019 B29 RUBBER CUSHION L0301UB 1EM420364 CLN310 FFC WIRE 50P 50P 70MM WX1L0300 005 CLN311 FFC WIRE 50P 50P 70MM WX1L0300 005 CLN312 FFC WIRE 20P 20P 140MM WX1L0300 006 L1 SCRE...

Page 46: ...0 01 F 50V CHD1JK30B103 C507 CHIP CERAMIC CAP 1608 B K 0 01 F 50V CHD1JK30B103 C509 ELECTROLYTIC CAP 100 F 10V M H7 CE1AMASSL101 C510 CHIP CERAMIC CAP 1608 B K 0 01 F 50V CHD1JK30B103 C512 CHIP CERAM...

Page 47: ...CTROLYTIC CAP 47 F 16V M H7 CE1CMASSL470 C788 CERAMIC CAP AX F Z 0 01 F 25V CCA1EZTFZ103 C801 ELECTROLYTIC CAP 220 F 16V M H7 CE1CMASSL221 C802 ELECTROLYTIC CAP 220 F 16V M H7 CE1CMASSL221 Ref No Desc...

Page 48: ...ERB12 06 QDQZ0ERB1206 D541 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 SWITCHING DIODE 1N4148 NDTZ001N4148 Ref No Description Part No D542 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 SWITCHING DIODE...

Page 49: ...6 P5 0 JW5 0T L781 PCB JUMPER D0 6 P5 0 JW5 0T L851 PCB JUMPER D0 6 P5 0 JW5 0T Ref No Description Part No TRANSISTORS Q31 TRANSISTOR 2SC2785 F or QQSF02SC2785 TRANSISTOR 2SC2785 H or QQSH02SC2785 TRA...

Page 50: ...QSY02SC2120 Q633 TRANSISTOR 2SC2785 F or QQSF02SC2785 TRANSISTOR 2SC2785 H or QQSH02SC2785 Ref No Description Part No TRANSISTOR 2SC2785 J or QQSJ02SC2785 TRANSISTOR KTC3199 GR or NQS10KTC3199 TRANSIS...

Page 51: ...J 10k RRXAJR5Z0103 R90 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R91 CARBON RES 1 4W J 4 7k RCX4JATZ0472 R92 CHIP RES 1608 1 10W J 1 RRXAJR5Z01R0 R501 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R502 CHIP RE...

Page 52: ...CHIP RES 1608 1 10W J 100 RRXAJR5Z0101 Ref No Description Part No R754 CHIP RES 1608 1 10W J 75 RRXAJR5Z0750 R755 CHIP RES 1608 1 10W J 18k RRXAJR5Z0183 R756 CHIP RES 1608 1 10W J 1k RRXAJR5Z0102 R757...

Page 53: ...V 8 4 9R JXRL010RP006 JK709 RCA JACK WHITE MTJ 032 06B 22 or JXRL010LY052 RCA JACK 1P AV 8 4 9W JXRL010RP011 JK710 RCA JACK RED MTJ 032 06A 21 or JYRL010LY014 RCA JACK 1P RED WITH SW ITCH AV1 09S 2 JY...

Page 54: ...3KV CCD3FJASL220 C442 CERAMIC CAP AX B K 0 047 F 50V CA1J473TU011 C461 ELECTROLYTIC CAP 4 7 F 35V M or CA1G4R7SP068 ELECTROLYTIC CAP 4 7 F 35V M CA1G4R7NC186 C462 ELECTROLYTIC CAP 4 7 F 35V M or CA1G...

Page 55: ...NSISTOR KTC3199 GR or NQS10KTC3199 TRANSISTOR KTC3198 GR or NQS40KTC3198 TRANSISTOR 2SC3331 T AANP or 2SC3331TZ Ref No Description Part No TRANSISTOR 2SC3331 U AANP or 2SC3331UZ TRANSISTOR 2SC1815 GR...

Page 56: ...608 1 10W 0 RRXAZR5Z0000 R441 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R442 CHIP RES 1608 1 10W J 470 RRXAJR5Z0471 R443 CHIP RES 1608 1 10W 0 RRXAZR5Z0000 R444 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R44...

Page 57: ...F20LCTE L0305UF 2004 09 21...

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