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Panasonic TX-28EX4F, Service Manual

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Panasonic TX-28EX4F Service Manual Download Page 13

POWER SUPPLY BLOCK DIAGRAM

11

H - BOARD

D868

+

~

~

IC801

T801

IC251

D850

TUNER

Q850

T551

IC851

IC853

IC351

IC451

D454

IC701

Q853

IC1104

IC1101

IC1102

IC1103

IC1105

IC2101

T802

RL801

IC1071

5V SBY

5V SBY

5V

5V

IC601

8V

2

2

43

66

1

31

32

8

2

33

46

15

58

3

4

2

1

3

1

S4

B1

P2

P1

S5

S2

S7

10

9

6

8

5

6

2

6

3

1

6

12V

200V

33V

-14V

14V

27V

150V

29V

7V

15V

5V

D867

Q852

Q854

Q855

1

D805

R805

R814

IC850

1

2

D862

R854

33V

16

REMOTE

CONTROL

RECEIVER

N - BOARD

RESET

MICRO

PROCESSOR

AUDIO

PROCESSOR

VIDEO

PROCESSOR

EPROM

EAROM

RESET

REG

REG

REG

IC3401

7

VIDEO

SWITCHING

EW

CORRECTION

POWER

SUPPLY

RGB

OUTPUT

V-OUTPUT

AUDIO

OUTPUT

D801

E - BOARD

Y - BOARD

E3

2

Y3

2

N1

2

E19

2

E1

4

1

E2

2

1

R802

DEGAUSS

COIL

Line

Filter

E62

1

H3

2

IC852

REG

1

9V

3

Summary of Contents for TX-28EX4F

Page 1: ...C to allow a number of diagnostic and control functions to be performed For more details contact your local Panasonic company BACK EXIT TX 28 25EX4F Service Manual Safety Specifications Block Diagrams...

Page 2: ...BACK BACK BACK E Schematic N Schematic H Schematic Y Schematic E PCB Y PCB Audio Power supply Control Video...

Page 3: ...CAx2 500mV rms1k AV1 IN Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 10k RGB 21 pin AV1 OUT Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 1k AV2 IN Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 10k S...

Page 4: ...abinet part on the receiver such as screw heads aerials connectors control shafts etc When the exposed metallic part has a return path to the chassis the reading should be between 4M ohm and 20M ohm W...

Page 5: ...SERVICE HINTS How to remove the rear cover 1 Remove the 12 screws as shown in Fig 2 LOCATION OF CONTROLS 3 SCREWS Fig 2 Fig 3 N Board E Board Y Board Focus Screen H Board...

Page 6: ...h the TV on 2 Go into Service Mode as explained above The screen will show 3 Press the BLUE button on the remote control The screen will show 4 Press the STR button on the TV The screen will show 5 Al...

Page 7: ...ls at the front of the set at the same time pressing the STATUS button on the remote control and the screen will show If the CCU ports have been checked and found to be incorrect or not located then w...

Page 8: ...75mV 64 S 64 S 3V H Out IC601 Pin 50 Vert Out IC601 Pin 31 20mS 0 7V 13 S 3 7V SCL IC1201 Pin 3 R Out E8 Pin 5 64 S 4 6V HFLB IC601 Pin 13 64 S 6 2V R Out IC601 Pin 37 64 S 275mV G Out IC601 Pin 38 27...

Page 9: ...l Linearity V Lin 006 Optimum setting Vertical Symmetry V Sym 002 Optimum setting DVCO DVCO 005 Receive a PAL Colour Bar Pattern For DVCO alignment press Blue button wait until the colours are changin...

Page 10: ...OUT 39 Q305 Q303 Q301 E8 4 3 5 Q353 Q352 Q351 CRT 3 2 1 7 8 9 Y2 4 3 5 IC351 TUNER Q104 5HG OXH UHHQ 9LGHR Q 9 9LGHR 2XW G OUT 38 R OUT 37 G IN 46 R IN 45 Q306 Q304 Q302 Q354 7 7 VM COILS Q905 Q907 Q9...

Page 11: ...L OUT 1 R OUT 3 L OUT 2 R IN 6 L IN 2 R IN 6 L IN 47 ANA_IN1 44 MONO IN DACM_L 25 SC3_IN_R 38 SC1_IN_R 42 SC1_IN_L 41 SC2_OUT_R 27 SC2_OUT_L 28 SC2_IN_R 40 SC2_IN_L 39 Q252 Q251 2 L L 11 4 L HEADPHON...

Page 12: ...MATRIX 60 Q854 52 Q853 74 IC1071 Q1052 81 AV2 8 10 AV1 8 10 12 Q856 75 Q851 Q1106 Q1105 Q1107 Q1104 51 72 73 AV LINK SLOW 2 SLOW 1 SCL 1 SDA 1 59 58 Q3006 Q3007 55 VPROT KEYSCAN ON OFF R C L E D PROT...

Page 13: ...P2 P1 S5 S2 S7 10 9 6 8 5 6 2 6 3 1 6 12V 200V 33V 14V 14V 27V 150V 29V 7V 15V 5V D867 Q852 Q854 Q855 1 D805 R805 R814 IC850 1 2 D862 R854 33V 16 REMOTE CONTROL RECEIVER N BOARD RESET MICRO PROCESSOR...

Page 14: ...PARTS LOCATION 12 NOTE The numbers on the exploded view below refer to the mechanical section of the Replacement Parts List 19 20 16 12 14 15 4 5 7 11 3 18 13 6 17 8 1 9 2 10...

Page 15: ...OR IC601 VDP3108BPPB1 HORIZONTAL OUTPUT IC701 TEA2031A POWER SUPPLY IC801 STRF6654LF51 ERROR AMPLIFER IC850 SE140N 12V REGULATOR IC851 L78M12MRB 5V REGULATOR IC852 L78M05MRB 8V REGULATOR IC853 AN78L08...

Page 16: ...Q351 2SA1767 TRANSISTOR Q352 2SA1767 TRANSISTOR Q353 2SA1767 TRANSISTOR Q354 BC857B TRANSISTOR Q451 BC857B TRANSISTOR Q503 2SD2398 M2 TRANSISTOR Q551 BU2508AXLB TRANSISTOR Q552 2SC1473 RN TRANSISTOR Q...

Page 17: ...CARB JSE10 ERJ6GEY0R00 0 1W 5 0 S M CARB JA45 ERJ6GEY0R00 0 1W 5 0 S M CARB JA60 ERJ6GEY0R00 0 1W 5 0 S M CARB JA58 ERJ6GEY0R00 0 1W 5 0 S M CARB JA55 ERJ6GEY0R00 0 1W 5 0 S M CARB JA54 ERJ6GEY0R00 0...

Page 18: ...6GEYJ273 0 1W 5 27K S M CARB R563 ERJ6GEYJ474 0 1W 5 470K S M CARB R564 ERJ6GEYJ623 0 1W 5 62K S M CARB R566 ERJ6GEYJ563 0 1W 5 56K WOUND R567 ERF7ZK1R0 7W 10 1 S M CARB R601 ERJ6GEYJ101 0 1W 5 100 S...

Page 19: ...W 5 100 S M CARB R1128 ERJ6GEYJ682 0 1W 5 6K8 S M CARB R1129 ERJ6GEYJ682 0 1W 5 6K8 S M CARB R1130 ERJ6GEYJ103 0 1W 5 10K S M CARB R1131 ERJ6GEYJ103 0 1W 5 10K S M CARB R1132 ERJ6GEYJ101 0 1W 5 100 S...

Page 20: ...EYJ101 0 1W 5 100 S M CARB R3606 ERJ6GEYJ101 0 1W 5 100 S M CARB R3607 ERJ6GEYJ472 0 1W 5 4K7 S M CARB R3608 ERJ6GEYJ752 0 1W 5 7K5 S M CARB R3609 ERJ6GEY0R00 0 1W 5 0 S M CARB R3610 ERJ6GEYJ102 0 1W...

Page 21: ...100V 470nF CERAMIC C806 ECKWNA101MBC 400V 100 F CERAMIC C807 ECKC2H472J 500V 4 7nF CERAMIC C808 ECKC2H472J 500V 4 7nF CERAMIC C809 ECKC2H472J 500V 4 7nF CERAMIC C810 ECKC2H472J 500V 4 7nF ELECT C811...

Page 22: ...2JCX 50V 2 2nF S M CAP C3008 ECUV1H222JCX 50V 2 2nF S M CAP C3009 ECUV1H222JCX 50V 2 2nF ELECT C3010 ECA1CM470GB 16V 47 F S M CAP C3012 ECUV1H561JCX 50V 560pF ELECT C3013 ECJ3VB1C474K 3 5KV 470nF S M...

Page 23: ...CF50X41 CABINET 15 TKY8E305 DEGAUSS COIL 16 TLK8E05140 E P C B 17 TNP8EE009AF MODEL LABEL 18 TQF8E2682 POWER CORD 19 TSX8E0027 Y P C B 20 TNP8EY012AF MISCELLANEOUS COMPONENTS OUTER CARTON TPC8E4659 TO...

Page 24: ...ng and are subject to change without notice REMARKS a Do not touch the hot part or the hot and cold parts at the same time as you are liable to a shock hazard b Do not short circuit the hot and cold c...

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ...Q856 F9 D865 I9 IC1104 C9 Q855 J5 D864 I10 IC1103 F8 Q854 B4 D863 G9 IC1102 D10 Q853 B4 D862 N10 IC1101 D8 Q852 B5 D861 J9 IC1051 A10 Q850 F5 D860 I10 IC852 I10 Q701 J5 D859 H5 IC851 G5 Q552 N3 D858 E...

Page 30: ...A7 Q353 G6 Q352 F6 Q351 F6 DIODES D906 F1 D905 G4 D904 D3 D902 G4 D901 G3 D364 C9 D363 C8 D362 B9 D361 B7 D360 D8 D359 G6 D358 E7 D357 F7 D356 G7 D355 F7 D354 G7 TEST POINTS TPY6 B8 TPY5 D5 TPY4 E5 T...

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