Sanyo TVS-2542M Schematic

TMPA 8859 SERVICE MANUAL

CONTENT

(1) General-----------------------------------------------------------------------------1 (2) Frame Chart-------------------------------------------------------------------fig.1 (3) IC Function Introduction ------------------------------------------------------1

3.1 N501 TMPA8859-----------------------------------------------------2

3.2 N001 TC90L01N ----------------------------------------------------------3

3.3 N301 TDA8172 ------------------------------------------------------------4

3.4 N601 TA1343N-------------------------------------------------------------4

3.5 N602 TA8246N----------------------------------------------------------4

2

(4) I

C Bus Control ------------------------------------------------------------------5

4.1 Menu Entry -------------------------------------------------5

4.2 Item Introduction -----------------------------------------------------------5

(5) IC Voltage --------------------------------------------------------------8 (6) Trouble shorting------------------------------------------------------------------9

Modelos:

TVS-2542M(SCL) TVS-2545PF(SCL) TVS-2944M(SCL) TVS-2945PF(SCL) TVS-3444M(SCL) TVS-3445PF(SCL)

1

TC90L01

TA1343N

TN8246H

VM

2SC3619 X 3

TDA8172

2SD880

BSC29-3802-12R

(1) General

This chassis is consists of main IC TMPA8859, TA1343N, TC90L01N. TMPA8859 is an integrated circuit for a PAL/NTSC TV. A MCU and a TV signal processor (SP) are integraed in a 64-pin shrink DIP package. The MCU contains 8-bit CPU,ROM,RAM,I/O ports,timer/counters, A/D converters,an on-screen display controller,remoter control interfaces,IIC bus interfaces. The TV signal processor contains PIF,SIF,Video,multi-standard chroma,Sync,RGB processors.

(2) Frame Chart (see fig.1)

L

→

TUNER

AV/TV SWITCH

AUDIO PRO.

AUDIO POWER

R

PIF/SIF R, G, B

TMPA 8859

OSCILLLLATION

CRT

VT/BL BH/RF AGC

V-OUT

DPC CIRCUIT

H-OUT

2SD2539

SCAN

TRANSFORMER

+130V +22V +27V

∽ 110- 220V +13

ON/OFF POWER

STR-G9656

fig.1

1

Icon

Description

SDA2

1

IIC bus serial data input/output

KEY

3

Key input

DVSS

4

GND connection

XOUT

6

8 MHz oscillator connection

XIN

7

8 MHz oscillator connection

DVDD

9

5V power supply

VVSS

10

GND connection

FBP IN

12

Input terminal for FBP

H.OUT

13

Horizontal driving pulse output

V.SAW

15

Terminal to be connected capacitor to generate V saw signal

V.OUT

16

Vertical driving pulse output

Ys

18

Ys IN

Cb in

19

Input terminal for Cb signal

Y in

20

Input terminal for Y signal

Cr in

21

Input terminal for Cr signal

DIG GND

22

GND terminal for Digital block

C in

23

Input terminal for Chroma signal

V2 in

24

Input terminal for Video signal

DIG Vdd

25

Vcc terminal for Digital block

CW out

26

Output terminal for fsc wave signal

EW out

28

Output terminal for east-west correction singal

IF Vvv(9V)

29

Vcc terminal for IF circuit

SIF out

31

Detected SIF signal output terminal

EHT in

32

DC NF

34

Terminal to be connected capacitor for DC Negative feedback

PIF PLL

35

Loop filter for PIF PLL connection

REG FIL

37

Terminal to be connected capacitor for stabilizing internal bias

DE-EMP

38

Terminal to be connected capacitor for SIF Det De-Emphasis

(3) IC Function Introduction

3.1 N501 TMPA8859 Function: MCU and SP

X-RAY 2 X-ray Output

RESET 5 Reset signal input

TEST 8 GND connection

TV GND 11 GND terminal for Analog block

H.AFC1 14 H AFC filter connection

H.Vcc(9V) 17 Vcc terminal for DEF circuit

ABCL in 27 Input terminal for ABL/ACL control

TV out 30 Detected PIF signal output terminal

H.C0TT in 33

IF Vvv(5V) 36 Vcc terminal for IF circuit

IF AGC 39 IF AGC filter connection

2

IF GND

40

GND terminal for IF circuit

IF IN

41

Input terminals for IF signals

IF IN 42 Input terminals for IF signals

RF AGC

43

RF AGC control level output

YC Vcc

44

Vcc terminal for Y/C circuit

Black DET

46

Terminal to be connected with Black Det filter for black stretch

APC Filter

47

Terminal to be connected with APC filter for Chroma demodulation

RGB Vcc

49

Vcc terminal for RGB circuit

R OUT

50

Output terminal for R signal

B OUT

52

Output terminal for B signal

TV GND

53

GND terminal for Analog block

A VDD

55

5V power supply

MUTE

56

SCL1

58

IIC bus serial clock input

PWM

59

SCL2

61

IIC bus serial clock input

SYNC

62

Horizontal sync signal input

REMOTE

63

Remote controller signal input

POWER

64

Power control (On=Hi. Off=L)

Name

Function

Lin TV

1

This pin is for input a left audio signal form the main demodulator in the TV

Vin TV

2

This pin is for input a composite video signal form the main demodulator in the TV

Rin TV

3

This pin is for input a right audio signal form the main demodulator in the TV

LinV1

5

This pin is for input a left audio signal from an external source(V1 channel)

CinS1

6

This pin is for input a chroma signal from an external source(S1 channel)

RinV1

7

This pin is for input a right audio signal from an external source(V1 channel)

VinV2

8

This pin is for input a composite video signal from an external source(V2 channel)

LinV2

9

This pin is for input a left audio signal from an external source(V2 channel)

ALC

10

This is an detect output pin of ALC(Auto Level Control)

RinV2

11

This pin is for input a right audio signal from an external source(V2 channel)

Vcc

12

This is the power supply pin. Apply 9V to this pin.

SDA

13

This is an IIC bus data input/output pin.

SCL

14

This is an IIC bus clock input pin.

Vsm out 45 Output terminal for Vsm signal

IK IN 48 Sense ACB cathode current input

G OUT 51 Output terminal for G signal

A GND 54 GND connection

SDA1 57 IIC bus serial data input/output

LED 60

3.2 N001 TC90L01N Function: I2C bus control , Audio/Video switching IC

V/Yin V1 4 This pin is for input a luminance signal or composite video signal from an external

source(V1 channel)

GND 15 This is the GND pin. Rout TV 16 This pin is for output right audio signal.

3

Lout TV

17

This pin is for output left audio signal.

Yout

18

This pin is for output luminance signal.

BAND2

19

This pin is for output band2 to control tuner.

Cout

20

This pin is for output chroma signal.

BAND1

21

This pin is for output band1 to control tuner.

Vout

22

This pin is for output main channel composite video signal.

Rout Mon

23

This pin is for monitor-output right audio signal.

Lout Mon

24

This pin is for monitor-output left audio signal.

FUNCTION

1

Inverting input

2

Supply voltage

3

Flyback generator

4

Ground

Name

Function

Offset canceling filter

1

DC offset canceling filter for bass boost.

2-5

Terminals for capacitors of the phase shift blocks.

Lch input

6

Audio input terminal.

GND

7

GND terminal.

Wch output

12

Woofer audio output terminal.

Rch output

13

Right audio output terminal.

Treble HPF(L)

14

HPF for treble control circuits.

Bass LPF(L)

15

LPF for bass control circuits.

Lch output

16

Left audio output terminal.

Woofer LPF1

17

LPF for bass boost circuit.

Woofer LPF2

18

LPF for bass boost circuit.

Woofer LPF3

19

LPF for bass boost circuit.

Vcc

20

This is the power supply pin. Apply 9V to this pin.

SDA

24

This is an IIC bus data input/output pin.

3.3 N301 TDA8172 Function:

5 Output 6 Output stage supply 7 Non- Inverting input

3.4 N601 TA1343N Function:TV sound processor

1

φ4-φ

Rch input 8 Audio input terminal. Bias filter 9 Filter for noise rejection of the bias. Bass LPF(R) 10 LPF for bass control circuits. Treble HPF(R) 11 HPF for treble control circuits.

V-scan output

Volume filter 21 Smoothing filter for volume control Woofer LPF 22 Smoothing filter for bass boost control SCL 23 This is an IIC bus clock input pin.

4