PHILIPS 25PT5425
Manual de Servicio

7

Electrical diagrams and print lay-outs
RESERVED

A8.0E

57

TDA8601 RGB/YUV AND FAST BLANKING SWITCH IC 7275 on RGB processing

A7

SAA4961 MULTI-STANDARD COMB FILTER IC 7000 on COMB filter panel (RESERVED)

G
4

2
IFDEM1
IOCNTR

26

28

3

6

15

18

16

5
REFbp Vref

DECODING
IFDEM2

CV090

Y-OUT

14

24
VIDOa

DELAY

2

VIDIa1

IFVO

6

VIDIa2

TMSEL

BPF TP1

SELECTABLE CLAMP SELECTABLE CLAMP

3-STATE
AGCOUT

17 Y|CVBSIN 16 10 C-IN
VIDOb

SUM SYS2

SELECTABLE CLAMP

12

VCLAMP

C-OUT

12 13

3

VIDIb1

11
19 CSY

SYNC

CLOCK

CONTROL

IXFsc COMB-ON|OFF 25 FSC 1

DEC_AGC

4

VIDIc1

SELECTABLE CLAMP SELECTABLE CLAMP

8
CVBS_INT
VIDOc

21

7

9

SYS1 BPF TP3
20

7

VIDIb2

VCC

SELECTABLE CLAMP

D-GND

3-STATE

23

10

8

VIDIc2

3-STATE
CVBSO

5 15 14

SEL

FBI1 FBO FBI2

13

3-STATE
Vp

CVBS_Y

GND

3

4

54

53

7
SCL

8
SDA

43

39

14

44 12
V_P1 GND2 TO2

37
V_P2

CORRELATOR TP2
9
DEC_BG

TDA8844 PAL/NTSC/SECAM TV PROCESSOR IC 7150 on Tuner+IF , Video processing

SECPLL GND1

9

DECDIG TO1

1

XTAL2

A4

A5

, Synchronisation

A6

and RGB processing

A7

A-GND

42
PH2LF

41

40

48
IFIN1

VIF AMPLIFIER + PLL DEMOD

IFIN2

POL

FBISO LPF10N

49

AGC FOR IF + TUNER

TOP

I2C-BUS TRANSCEIVER

SYNC SEP + 1ST LOOP

VCO + CONTROL

2ND LOOP HOR. OUT

EW GEOMETRY

45
EWD

EHTO VDRA

50 46 47 52 51 21 20 19

5

PLLLF

AFC

VIDEO AMPLIFIER

CONTROL DAC�S

VERT. SYNC SEPARATOR

RYO HOUT

H/V DIVIDER

VERTICAL GEOMETRY

VDRB I_REF

AFC INDENT VIDEO IDENT 15 55 2
AUDIOEXT AUDIOOUT AUDEEM

MUTE VIDEO MUTE CHROMA TRAP + BANDPASS FILTER TUNING REF CONTINUOUS CATHODE CALIBRATION

RBG CONTROL BLUE STRETCH OUTPUT
BYI LUMIN

RYI

WHITE P BRI CONTR

VSC RO GO BO

22 SWITCH + VOLUME VOL SW PAL/NTSC SECAM DECODER PRE-AMP + MUTE CVBS-Y/C SWITCH SW LUMA DELAY PEAKING CORING HUE REF SW LIMITER PLL DEMOD CVBS SWITCH
CVBS_EXT

BLACK STRETCH RGB MATRIX RGB-1 INPUT

BCLIN BLKIN

18 23

56
DECSDEM

RI

24 SAT CD MATRIX SAT. CONTROL SKIN TINT
LUMOUT
GI BI RGBIN

1
SNDIF

BASE-BAND DELAY LINE

25 26

CHROMA

PLL-GND

XTAL1 VOO

REFO DELAY LINES

6

13 17 38

10 11 36 35 34 16 33

28 29 30

BYO

DET PH1LF

32 31 27
CL 86532034_001.AI 290598