Symphonic WF15L5 Service Manual Download Page 16

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WAVEFORMS

L3120WF

3-1

1DIV: 1.0V 10 s

1DIV: 1.0V 20 s

R392

WF1

1DIV: 1.0V 10 s
R394

WF5

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

WF1 ~ WF9 = Waveforms to be observed at

Waveform check points.
(Shown in Schematic Diagram.)

1DIV: 1.0V 20ns
R365

WF2

R202

WF3

1DIV: 200mV 20 s
Pin 11 of CN103A

WF7

1DIV: 200mV 20 s
Pin 9 of CN103A

WF8

1DIV: 100mV 400 s
Pin 14 of IC801

WF6

1DIV: 1.0V 10 s
R201

WF4

1DIV: 200mV 20 s
Pin 7 of CN103A

WF9

CLKH

CLKV

POL

STH1

AUDIO

CVBS

S-VIDEO-Y

S-VIDEO-C

Summary of Contents for WF15L5

Page 1: ...l 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 1 1 Schematic Diagrams CBA s and Test Poin...

Page 2: ...OLUME AUDIO MUTE SDA SCL INPUT 0 INPUT 1 S SW SCL SDA 20 35 31 40 19 32 41 TO POWER SUPPLY BLOCK DIAGRAM TO IF VIDEO BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM BACKLIGHT SW BACKLIGHT ADJ P ON H VOLUME AUDIO...

Page 3: ...DEO1 IN JK701 S VIDEO IN BUFFER Q32 SDA TO SYSTEM CONTROL BLOCK DIAGRAM SCL S SW C Y 3 IC781 INPUT SELECT 5 Q703 4 13 12 Q702 14 1 2 Q701 15 SW CONTROL 10 9 11 INPUT 0 INPUT 1 TO SYSTEM CONTROL BLOCK...

Page 4: ...H MATRIX AGC OFFSET CANCEL L R FILTER L R SAP SW SAP FILTER I2C DECORDER SAP DEMOD SAP OUT FILTER 29 30 TO IF VIDEO BLOCK DIAGRAM TUNER TUNER L CH R CH 21 27 24 IC851 MTS SAP AUDIO SIGNAL PROCESS AUDI...

Page 5: ...5 1 EG 0 50 EG 1 49 EG 2 48 EG 3 47 EG 4 46 EG 5 45 EB 0 43 EB 1 42 EB 2 41 EB 3 40 EB 4 39 EB 5 38 OFFEV 12 STV1 13 CLKV 14 HMS1 E 7 HMS1 0 13 STH1 42 POL 43 LP 44 CN311 170 169 166 165 164 163 162...

Page 6: ...ings 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 1...

Page 7: ...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 t...

Page 8: ...ram L3120SCM1 MAIN 1 5 Ref No Position IC531 D 4 IC533 E 3 IC671 E 2 IC672 E 2 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 CN101A A 4 CN102A A 3...

Page 9: ...2 4 L3120SCM2 Main 2 5 Schematic Diagram MAIN 2 5 Ref No Position IC31 I 1 IC851 H 3 IC852 J 4 Q32 J 2 CN113 G 1 ICS TRANSISTOR CONNECTOR...

Page 10: ...matic Diagram L3120SCM3 MAIN 3 5 Ref No Position IC781 P 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 Q802 O 1 Q803 N 1 CN801 M 4 CN802 M 3 CN103A M 2 ICS TRANSI...

Page 11: ...AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail NOTE The voltage for parts in hot circuit is measured using hot GND as a common terminal For c...

Page 12: ...osition 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 CN402 AD...

Page 13: ...2 8 L3120SCF Function Schematic Diagram...

Page 14: ...2 9 L3120SCL1 LCD Main 1 2 Schematic Diagram LCD MAIN 1 2 Ref No Position IC333 B 3 Q301 D 1 CN104 A 3 CN105 A 2 CN111 A 2 CN211 F 4 CN311 F 4 CN102B A 4 CONNECTORS IC TRANSISTOR...

Page 15: ...in 2 2 Schematic Diagram LCD MAIN 2 2 Ref No Position IC151 I 3 IC171 J 3 IC191 H 2 IC192 H 1 IC193 H 2 IC201 J 1 Q131 I 4 Q201 J 1 CN112 L 4 CN312 L 3 CN101B L 4 CN103B G 2 ICS CONNECTORS TRANSISTORS...

Page 16: ...1 WF9 Waveforms to be observed at Waveform check points Shown in Schematic Diagram 1DIV 1 0V 20ns R365 WF2 R202 WF3 1DIV 200mV 20 s Pin 11 of CN103A WF7 1DIV 200mV 20 s Pin 9 of CN103A WF8 1DIV 100mV...

Page 17: ...IDEO1 IN AUDIO1 L IN MAIN CBA FUNCTION CBA BACK LIGHT CN402 2 1 CN311 1 3 2 5 4 7 6 8 9 10 13 12 11 14 15 17 16 19 18 21 20 22 23 24 27 26 25 28 29 30 GND CLKH GND GND HMS1 E ER 0 ER 1 ER 2 ER 3 ER 4...

Page 18: ...D191 ZENER DIODE EDZTE61 4 7B QD1B00EDZ4R7 D701 Not used D702 Not used D703 Not used IC191 VOLTAGE REGULATOR PQ1LAX95MSPQ QSZBA0TSH053 IC192 VOLTAGE REGULATOR LD1117SC R NSZBA0TSS229 IC333 DIGITAL VID...

Page 19: ...WF15L5 L3120UL 2005 06 25...

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