Grundig W70-1021 Schematic

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Page 1

GRUNDIG

W70-1021

Product code: 564383

SERVICE MANUAL

June, 10th 2002

CONTENTS: (E12)

1. PRODUCT SPECIFICATIONS & FEATURES : PAGE 2

2. BLOCK DIAGRAM : PAGE 3,4,5,6

3. COMPONENT LOCATION : PAGE 7,8

4. SET-UP PROCEDURE & ALIGNMENT INSTRUCTIONS : PAGE 9-17

5. IC PIN DETAILS : PAGE 18-22

6. PCB LAYOUTS : PAGE 23

7. EXPLODED VIEW, MANUF. PARTS : PAGE 24,28

8. PART LIST : PAGE 25-27

9. CIRCUIT DIAGRAMS : PAGE 29-31

Page 2

PRODUCT SPECIFICATION & FEATURES

TVTEXT Version 7p (SDA 5553-A009/EV E945)

1. SCREEN SIZE:

2. AVAILABLE

STANDARDS:

3. TUNER:

4. FEATURES:

5. SOUND:

6. TELETEXT:

7. CONNECTIONS:

8. VIDEO:

9. CONSUMPTION:

28” PAL I,

HYPERBAND: VHF 2-12, UHF 21-69, S1-S41 Frequency synt. (62,5KHz search steps), MENU oriented OSD (On Screen Disp.) Multilanguage MENU OSD, 100 programs, Full function remote control, Automatic switch off at the end of the progr. Off timer 0 - 120 min., Organise Program Informatio n System (OPIS) with the following functions:

• Autostore with simple ATS: Autostore, Name, Order,

• Insert

• Delete

• Rename,

MONO/STEREO/DUAL sound decoder, Virtual Dolby sound, NICAM Digital Stereo Sound Processor, Muting, 2 loudspeakers, Audio music power: 2x15W (STEREO), 7 - page TTX with FLOF and P26, Westeuropean and easteuropean language support. SCART I AV connector (21 - pin) video, RGB and SVHS, SCART II AV connector (21 - pin) video Antenna connection 75 ohms unbalanced, Blue stretch, Automatic Colour limiting, Colour Temperature adjustment,

≈95W; <9W stand by; POWER REQUIREMENTS: Voltage/frequency: 230V/50Hz , rating (180V - 250V)

Page 3

BLOCK DIAGRAM: MODULES ARRANGEMENT ON CHASSIS

E12 CHASSIS

MODULES & CONNECTION

21.5.2002

Page 4

BLOCK DIAGRAM – MODULES & CONNECTIONS

AUDIO

SREREO

AUDIO

VK-E9T

TDA6107

IC201

K101B

K104

OUT

TDA7057A

IC102

PROC.

MSP34XXG

IC503

K102A

RGB

V+V-GUARD

RGB

K704

K301

VERT.

OUT

TDA8356-90°

TDA8351-110°

CRT SOCKET

K703B K704B

K752

H. DRIVE

K703A K704A

EW DRIVE

H. FLY

LZ-E9

IC301

Z_COR

E12 CHASSIS

BLOCK DIAGRAM

MODULES & CONNECTIONS

6.6.2002

K701

K702A

HOR.

OUT

BU508A

T701

42V

15V

EHT COMP

BEAMCURR

R,G,B,BL

SC1

200V

L,R

K105

SCART 1

U4468B

IC501

R,G,B,BL

R,G,B,BL IN

R G B

SWITCH

74HCT4053

IC801

CVBS_SC1

CVBS_INT

SIGNAL &

SAW

TUNER

E12

DEFL. PROC.

filter

F108

TUN101

CVB

S_EXT

VIDEO

SWITCH

TEA2014

TDA884X

IC101

SDA5553

CONTROL

& TEXT

IC1

PROC.

K901A

IC104

8,5V

33V

12V

15V

155V

POWER

SUPPLY

K106

SCART 2

CVB

SC2

2,5V

TDA4605-2

2,5V

3,3V

BUZ90A

IC601

T602

K601

230V AC

Page 5

BLOCK DIAGRAM – CONTROL SIGNALS

SIGNAL & DEFL. PR. IC101

EEPROM IC1

EEPROM IC2

pin54 pin26

SCL_pin7

SDA_pin8

SDA_pin5

SCL_pin6

SDA_pin5

SCL_pin6

AGC

IIC1

2 C

pin5

TUNER TUN101

SCL_pin4

SDA_pin5

STEREO PROC. IC503

SCL_pin7

SDA_pin8 pin20

VIDEO SW. IC104

pin5

RGB SW.

SFTLA_E9 TPA_CG

A 1 0 9

B Y E K

pin 15

A 1

) 1

(

0 9

D E

pin 46

) 2

(

CONTR. & TEXT PROC . IC1

pin 16

I R E P

SC1

K901A

5 C R

pin 24

(3)

pin 17

SC2

I R E P

5 n

i p _ 1

A D S

1 C S

_ L

p _ 1 L

C S

DECODER

T107

8 n

i p _ 2 L

C S

pin 3

IC801

pin9,10,11

ON/OFF SW. T9, T601, T603

V T

/ V

RESET

ON/OFF

AUDIO OUT IC102

VOL pin

1,7

Page 6

BLOCK DIAGRAM - SUPPLY VOLTAGES

Page 7

COMPONENT LOCATION AND MEASURING POINTS FOR

SUPPLY VOLTAGES ON MAIN CHASSIS – COMPONENT SIDE

155V adjust 200V155V

8,5V

2,5V

2,5V2,5V

3,3V

15V

42V

12V

33V

Page 8

COMPONENT LOCATIONS ON SEPARATE MODULES OF CHASSIS E12 – COMPONENT SIDE

VK-E9TM

TPA-CG

Page 9

SETUP PROCEDURE & ALIGNMENT INSTRUCTIONS

All necessary adjustments and settings are performed during manufacture of TV set and assure its correct operation when connected to the mains voltage and antenna or external video or audio signal. When TV set requires service intervention all settings should be checked and corrected, if necessary.

DEMAGNETISING OF PICTURE TUBE

Correctness o f picture tube d emagnetising i s usually automati cally checked . Magnetisatio n of picture tube is presented as one or more colour "clouds", consequently colour reproduction of the picture is not correct. Each time the TV set is switched on with mains switch, demagnetising system is activated. For correct demagnetising procedure disconnect the TV set with mains switch and leave it disconnected for about 15 minutes. Afterwards when you switch on the TV, demagnetising procedure is performed. In case distortion of colour reproduction still persists, special demagnetising coil should be used.

ADJUSTMENT ADJUSTMENT

CONDITION

1. SUPPLY VOLTAGE FOR HORIZONTAL OUTPT STAGE

»B+«

SWITCHING TO SERV ICE MODE

All other service settings of TV set are made in so called service mode of TV set operation. To enter this mode of operation press the keys in the following sequence: "TV", "I", and "STOP" in the period of 5 seconds from switching on the TV set to normal mode of operation. When the TV set is switched over to service mode the following status line with service parameter and parameter value appears on the screen:

SERVICE PARAM: XX VALUE: xx

The parameter to be set is selected with keys (P+/P-), and selected parameter is set with keys (volume+ /volume-). Each time you press the key for parameter selection ( ) the value of preselected parameter is stored. Therefore when the last setting is performed you must press one of the two keys once again. Values of individual parameters are expressed in hexadecimal form due to limited capacity of the memory. Values of individual parameters are variable from 0 to 3F, with the exception of some parameters (see the table at the end of describing service mod e) where values are changed fro m 0 to 7F and O1, O2, O3, O4, O5 which have value range between 0 an d FF. When setting is finished it should obligatory be concluded with "STOP" key. After a few seconds the status line disappears and service adjustment is accomplished.

• Connect the TV set to

supply voltage 175…250VAC.

• Switch it on and set it by

means of remote controller to AV mode of operation.

• Connect DC voltmeter to

D-602 cathode.

With P-601 potentiometer set supply voltage for horizontal output stage to:

ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

• 152V ±±±±0,5V

NOTE: In case service adjustment is not ended in above specified mode (e.g. power supply breakdown), the

adjustment should be repeated.

2. VERTICAL

PICTURE POSITION

• To antenna connector of

TV set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: VH VALUE: xx

• With remote

controller set vertical position of the picture: beginning of dark part of the picture should be exactly in the centre of the screen (two bright points on left and right side of the screen).

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ADJUSTMENT ADJUSTMENT

CONDITION

3. VERTICAL

AMPLITUDE ON TOP PART OF SCREEN

4. VERTICAL AMPLITUDE ON BOTTOM PART OF SCREEN

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: VA VALUE: xx

• To antenna connector of

TV set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: VS VALUE: xx

ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

• With remote

controller set vertical amplitude of picture on top, visible part of the screen. The beginning of test picture should be at the beginning of top part of the screen.

• With remote

controller set vertical amplitude of picture on bottom part of the screen. The lower part of test picture should be at the edge of bottom part of the screen. During this setting the picture on top part of the screen should not change.

5. CORRECTION OF

"S" VERTICAL PICTURE DISTORTION

6. HORIZONTAL PICTURE POSITION

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: SC VALUE: xx

• To antenna connector of

TV set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following setting

on the screen:

SERVICE PARAM: HS VALUE: xx

• With remote

controller correct the picture. The distances between the two horizontal lines of test picture in the centre of the screen should be equal to the distances on top and bottom part of the screen. If after this setting vertical amplitude of picture changes, see pos. 5 and 6.

• With remote

controller set test picture to the centre of the screen (if necessary first widen the picture, see pos.

7).

Page 11

ADJUSTMENT ADJUSTMENT

CONDITION

7. HORIZONTAL AMPLITUDE

OF PICTURE

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: EW VALUE: xx

ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

• With remote

controller set picture width. Edges of test picture should be just hidden behind the edges of the screen.

8. CORRECTION OF PICTURE HORIZONTAL PINCUSHION DISTORTION

9. CORRECTION OF PICTURE HORIZONTAL PINCUSHION DISTORTION IN CORNERS OF THE SCREEN

10. CORRECTION OF

PICTURE TRAPEZIUM DISTORTION

• To antenna connector of

TV set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: PW VALUE: xx

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

SERVICE PARAM: CP VALUE: xx

• To antenna connector of

TV set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following service

setting on the screen:

• With remote

controller correct the picture. On left and right side of test picture straight lines should appear (especially in the centre of the picture).

• With remote

controller correct the picture. On left and right part of test picture straight lines should appear also in corners of the screen.

• With remote

controller correct the picture. On left and right part of test picture perfectly straight and vertical lines should appear.

SERVICE PARAM: TC VALUE: xx

REMARK: If after correcting pincushion and trapezoidal distortion, changes the horizontal amplitude of picture, is necessary to

correct also horizontal amplitude of picture according to explanation in point 7.

Page 12

ADJUSTMENT ADJUSTMENT

CONDITION

11. OPERATING

THRESHOLD OF AUTOMATIC AMPLIFICATION REGULATION

• To antenna connector of TV

set, which is set to channel 12, connect VF signal source of frequency 224,25 MHz (C12) with RF amplitude 60dB/uV (1mV/75E).

• Connect voltmeter, dc, on

C107.

• Switch the TV set to service

mode of operation.

• Select the following service

setting:

SERVICE PARAM: AC VALUE: xx

ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

• With remote controller keep changing the value

of AC setting until 7.5V±0,5V appears on voltmeter display.

REMARK: If in chassis is inserted WW form of

tuner (small casing), with 5V supply, set on voltmeter value 2,8V±0,1V.

12. RED

COMPONENT OF WHITE

13. GREEN

COMPONENT OF WHITE

14. BLUE

COMPONENT OF WHITE

15. REFERENCE

OSCILLATING CIRCUIT OF DEMODULATOR

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• With remote

controller set value:

1F: Pict. Tube Philips,

Panasonic.

1F: Pict. Tube Thomson.

• Select the following service

setting:

SERVICE PARAM: R VALUE: xx

This value is for orientation and depends of picture tube.

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• With remote

controller set value:

24: Pict. Tube Philips,

Panasonic.

28: Pict. Tube Thomson.

• Select the following service

setting:

SERVICE PARAM: G VALUE: xx

This value is for orientation and depends of picture tube.

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• With remote

controller set value:

24: Pict. Tube Philips,

Panasonic.

20: Pict. Tube Thomson.

• Select the following service

setting:

SERVICE PARAM: B VALUE: xx

This value is for orientation and depends of picture tube.

PAL /SECAM BG/L

• With remote controller select the following

service setting:

SERVICE PARAM: I1 VALUE: xx

PAL /SECAM /L'

• With remote controller select the following

service setting:

SERVICE PARAM: I2 VALUE: 00

PAL /SECAM /DK

• With remote controller select the following

service setting:

SERVICE PARAM: I3 VALUE: 40

• With keys for set val ue cha ngin g set

parameter value.

SERVICE PARAM: I1 VALUE:40

• With keys for set val ue cha ngin g set

parameter value.

SERVICE PARAM: I2 VALUE: 00

• With keys for set val ue cha ngin g set

parameter value.

SERVICE PARAM: I3 VALUE: 40

Page 13

ADJUSTMENT ADJUSTMENT CONDITION ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

16. TIME DELAY

OF LUMINANCE SIGNAL

17. HORIZONTAL

OSD POSITION

18. OSD COLOUR

INTENSITY

19. OPTION BYTE 1

20. OPTION BYTE 2

21. OPTION BYTE 3

22. OPTION BYTE 4

23. OPTION BYTE 5

24. VOLTAGE FOR

PICTURE TUBE BEAM FOCUSING

• To antenna connector of TV set,

which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture.

• Select the following setting:

SERVICE PARAM: YD VALUE:xx

• To antenna connector of TV set,

which is switched on and operates in service mode, connect VF signal source with PHILIPS test (or any) picture.

• Select the following setting:

SERVICE PARAM: HD VALUE:xx

• To antenna connector of TV set,

which is switched on and operates in service mode, connect VF signal source with PHILIPS test (or any) picture.

• Select the following setting:

SERVICE PARAM: RG VALUE:xx

• Select the following setting:

SERVICE PARAM: O1 VALUE: xx

• Select the following setting:

SERVICE PARAM: O2 VALUE: xx

• Select the following setting:

SERVICE PARAM: O3 VALUE: xx

• Select the following setting:

SERVICE PARAM: O4 VALUE: xx

• Select the following setting:

SERVICE PARAM: O5 VALUE: xx

• Switch the colour TV with STOP

key on remote controller to normal mode of operation.

• Connect signal with Philips test

picture to antenna connector.

• With remote controller set such delay

setting that signals of colour and black white picture overlap.

Recommended value: D

• With remote controller set position of the

OSD (On Screen Display) to the centre of the screen.

• With remote controller set colour intensity

(4 steps) of the OSD (On Screen Display).

• See table of OPTION BYTES on followed

pages.

• See table of OPTION BYTES on followed

pages.

• See table of OPTION BYTES on followed

pages.

• See table of OPTION BYTES on followed

pages.

• See table of OPTION BYTES on followed

pages.

• With potentiometer for focusing voltage

adjustment on HV transformer set such value of volta ge, tha t give s shar p pict ure on entire surface of the screen. Sharpness should be equal in corners and in centre of the screen.

Page 14

ADJUSTMENT ADJUSTMENT CONDITION ADJUSTMENT ACTIVITY

AND RESULT OF SETTINGS

25. VOLTAGE OF

SECOND GRID OF U

PICTURE TUBE

26. REFERENCE

OSCILLATING CIRCUIT OF SOUND DEMODULATOR

Required instruments:

• oscilloscope,

• oscilloscope probe 100:1;

• Cp=2,5pF (oscilloscope setting

0,5V/div; 5ms/div: ext. actuation with vertical time b asis of TV set).

Procedure:

• To antenna connector connect signal

with Philips test picture.

• With oscilloscope probe search on

video output stage for the cathode of picture tube on which video signal has highest voltage level of black (oscilloscope setting: 0,5V/div; 20 µs/div: int. triggering). The probe should remain connected to this cathode.

• Change the setting o f oscilloscope to

5ms/div and ext. Triggering with vertical time basis of T V set and on oscillogram search for measuring "ABS" impulse (automatic black point stabilisation).

• To antenna connector of TV

set, which is switched on and operates in service mode, connect VF signal source with PHILIPS test picture and with 1kHz modulated sound carrier.

• Connect Volt-meter

• With

potentiometer for second grid voltage adjustment on HV transformer set such value of »ABS« pulse to voltage 130±2 V.

on pin 5 of IC525.

ABS pulse

• Rotating the core of

L521 coil to set 2,3V +/-0,lV on Voltmeter.

130V

Page 15

LIST OF SERVICE MODE PARAMETERS

NR. PAR. NAME FUNCTION FW

0 VH Vertical Shift 24h 00h 3fh 1 VA Vertical Amplitude 21h 00h 3fh 2 VS Vertical Slope 25h 00h 3fh 3 SC S-Correction 09h 00h 3fh 4 HS Horizontal Shift 25h 00h 3fh 5 EW EW width 33h 00h 3fh 6 PW EW Parabola/Width 19h 00h 3fh 7 CP EW Corner Parabola 08h 00h 3fh 8 TC EW Trapezium 1fh 00h 3fh

9 EW EW width 33h 00h 3fh 10 X1 Vertical zoom 16:9 (EXREND) 1fh 00h 26h 11 E1 EW width 16:9 (EXTEND) 20h 00h 3fh 12 S1 Vertical Scroll 16:9 (EX TEND ) 20h 00h 3fh 13 P1 PIP horizontal position 20h 00h 7fh 14 PA PIP adjustment right horizontal position 07h 00h 0fh 15 P2 PIP vert ical position 20h 00h 7fh 16 P3 PIP horizontal pos ition - zoom 20h 00h 7fh 17 X2 Vertical zoom CINEMA 00h 00h 26h 18 E2 EW width CINEMA 33h 00h 3fh 19 S2 Vertical Scroll CINEMA 20h 00h 3fh 20 X3 Vertical zoom ZOOM 1ah 00h 26h 21 E3 EW width ZOOM 33h 00h 3fh 22 S3 Vertical Scroll ZOOM 20h 00h 3fh 23 AC AGC take over 07h 00 h 3fh 24 R White point R 1fh 00h 3fh 25 G White point G 24h 00h 3fh 26 B White point B 24h 00h 3fh 27 I1 Adjustment IF-PLL AUTO 40h 00h 7fh 28 I2 Adjustment IF-PLL SECAM L 00h 00h 7fh 29 I3 Adjustment IF-PLL Sound Standard DK 40h 00h 7fh 30 YD Y-Delay 0dh 00h 0fh 31 HM Hotel Mode Max Loudspeaker value 2fh 00h 7fh 32 HD Display Ho r iz o nt al Delay 10h 00h 1fh 33 RG RGB Ga in for OSD 02h 00h 03h 34 O1 Option byte 1 20h 00h ffh 35 O2 Option byte 2 02h 00h ffh 36 O3 Option byte 3 50h 00h ffh 37 O4 Option byte 4 00h 00h ffh 38 O5 Option byte 5 00h 00h ffh

MIN MAX

FATAL ERROR DETECTION

VIDEO PROCESSOR NOT DETECTED, or POWER UP RESET o f Video Processor not finished – LED flashing with 1Hz.

Firmware value – Used in case of empty EEPROM or on service table checksum fail

Page 16

OPTION BYTES

Option bytes enable programme configuration of colour TV set. Changing individual bites of a byte modifies the characteristics of TV set.

Option byte O1:

Position76543210

Slo language

1 Enable Enable Enable Enable Enable 123 degrees Enable Enable 0 Disable Disable Disable Disable Disable 118 degrees Disable Disable

FW00100000

Hotel mode Black

stretch

Blue stretch Dynamic

skin control

Dynamic skin correction angle

Blue back NTSC

Option Byte O2:

Position76543210

Headphone menu

1 Disable 38 Enable Enable Enable Disable Enable Enable 0 Enable 06 Disable Disable Disable Enable Disable Disable

FW00000010

User set (east or west)

Top TV set is

16:9

EEPROM language

HBL bit video proc. On 4:3

Multistanda rd TV

PAL I

Option Byte O3:

Position76543210

Italian channels (c13-c20)

1 Disable Disable Enable Enable Standard Enable Enable 0 Enable Enable Disable Disable Delayed 8s Disable Disable

FW01010000

Zoom on 4:3

HBL in TXT (110 chassis) Avl (90 chassis)

AVL option Switch on ROM

language

Not used CTI

Option Byte O4:

Position76543210

Force mono volume

1 Enable Enable Enable Enable Enable Enable 0 Disable Disable Disable Disable Disable Disable

FW000000 0

DCO adjustment and INDIA_TV

DK toggle alternate sound (red key)

6.5Mhz and

5.74Mhz to

6.25 and

5.74 Mhz

Space effect

3D effect

Virtual Dolby effect

Virtual Dolby (text 3D)

Zet correction

Auto on (for quality department)

Low standby

Option Byte O5:

Position76543210

Not used Not used Tuner Scan 1 x 4 Not used

Tuner Scan Reverse U x 6

Tuner Scan 3 x 3

Tuner Scan 3 x 4

11 1 Enable Enable Enable 0 Disable Disable Disable

FW00000000

Second

zoom (UK)

Tuner scan Equaliser

Page 17

Option bytes are set so that besides selected op tion byte also hexad ecimal number is set on th e basis of above tables.

Example:

• blue back-enable

• dynamic skin control enable

• blue stretch enable

Select option byte O1 and for items, which should be activated, set “1” (other bites are “0”). In our case is as follows:

O1:

76543210 0 0 0 1 1 0 1 0

1 A

Shaded binary number should now be converted to hexadecimal value (darker frame). Afterwards set this value.

SERVICE PARAM: O1 VALUE: 1A

• CAUTION: Option bytes are Factory adjusted and must NOT be changed later, because

they change TV set characteristics.

27. INFORMATION MENU ABOUT

INTEGRATED CIRCUITS, CONNECTED TO I

C-BUS

If you press i key (info) on remote control when the TV set is in service mode, you will get on the screen information about

of current software (e.g.: VER: E9P7 4.5) and

the version

devices connected on I2C bus:

SERVICE

E9P7 4.5

TDA8843 MSP 34XX OK WD: FF SDA9488 XX SP : 00 TUNER2 XX TDA 8540 XX TDA8425 X

Video processor: Bus controlled TV processor

for video and audio signal

MSP 34XX: Digital stereo sound

processor

If device is installed and properly connected on I2C bus it will respond with “OK” beside the name of device, otherwise there will be “XX” on this place.

For conversion from binary to hexadecimal help us next table:

BIN HEX 0000 0 0001 1 0010 2 0011 3 0100 4 0101 5 0110 6 0111 7 1000 8 1001 9 1010 A 1011 B 1100 C 1101 D 1110 E 1111 F

Page 18

IC PIN DETAILS

TDA8843

SYMBOL PIN DESCRIPTION

SNDIF 1 Sound IF input AUDIOEXT 2 External audio input NC 3 not connected NC 4 not connected PLLLF 5 IF-PLL loop filter IFVO 6 IF video output SCL 7 serial clock input SDA 8 serial data input/output DECBG 9 bandgap decoupling CHROMA 10 chrominance input (S-VHS) CVBS/Y 11 external CVBS/Y input VP1 12 main supply voltage 1 (+8V) CVBS GND1 14 ground1 AUDIOOUT 15 audio output SECPLL 16 SECAM PLL decoupling CVBS BLKIN 18 black-current input BO 19 blue output GO 20 green output RO 21 red output BCLIN 22 beam current limiter input/V-guard input RI 23 red input for insertion GI 24 green input for insertion BI 25 blue input for insertion RGBIN 26 RGB insertion input LUMIN 27 luminance input LUMOUT 28 luminance output BYO 29 RYO 30 BYI 31 RYI 32 REFO 33 subcarrier reference output XTAL1 34 3.58MHz crystal connection XTAL2 35 4.43/3.58MHz crystal connection DET 36 loop filter phase detector VP2 37 2nd supply voltage 1(+8V) CVBS1O 38 CVBS-1 output DECDIG 39 Decoupling digital supply HOUT 40 horizontal output FBISO 41 flyback input/sandcastle output PH2LF 42 phase-2 filter PH1LF 43 phase-1 filter GND2 44 ground 2 EWD 45 east-west drive output VDRB 46 vertical driveB output VDRA 47 vertical driveA output IFIN1 48 IF input 1 IFIN2 49 IF input 2 EHTO 50 EHT/overvoltage protection input VSC 51 vertical sawtooth capacitor IREF 52 reference current input DECAGC 53 AGC decoupling capacitor AGCOUT 54 tuner AGC output AUDEEM 55 Audio deemphasis DECSDEM 56 Decoupling sound demodulator

13 internal CVBS input

INT

17 external CVBS input

EXT

(B−Y) signal output (R−Y) signal output (B−Y) signal input (R−Y) signal input

Page 19

TDA8351

SYMBOL PIN DESCRIPTION

drive(pos)

drive(neg)

GND 5 ground

1 input power-stage (positive); 2 input power-stage (negative); 3 operating supply voltage VO(B) 4 output voltage B

includes I

I(sb) signal bias

includes I

I(sb) signal bias

O(guard)

I(fb)

6 input flyback supply voltage VO(A) 7 output voltage A 8 guard output voltage VI(fb) 9 input feedback voltage

TDA6107Q

SYMBOL PIN DESCRIPTION

Vi(1) 1 inverting input 1 Vi(2) 2 inverting input 2 Vi(3) 3 inverting input 3 GND 4 ground (fin) Iom 5 black-current measurement output V

Voc(3) 7 cathode output3 Voc(2) 8 cathode output2 Voc(1) 9 cathode output1

6 supply voltage

TDA7057Q

SYMBOL PIN DESCRIPTION

VC1 1 DC volume control1 n.c. 2 not connected

l (1)

l (2)

SGND 6 signal ground VC2 7 DC volume control2 OUT2+ 8 positive output2 PGND2 9 power ground2

OUT2− OUT1−

PGND1 12 power ground1

OUT1+

3 voltage input1 4 positive supply voltage 5 voltage input2

10 negative output2 11 negative output1

13 positive output1

Page 20

SDA5553-A009/EV E945

Input (I)

Symbol

P0.0 1 I/O O AV/TV P0.1 2 I/O O BG/L P0.2 3 I/O O DECODER P0.3 4 I/O O BL_SC1 P0.4 5 I/O I/O IIC-SDA P0.5 6 I/O I/O IIC-SCL P0.6 7 I/O I/O IIC-SDA P0.7 8 I/O P1.0 45 I/O O L/L' P1.1 46 I/O O LED P1.2 47 I/O I/O N.C. (h) P1.3 48 I/O I/O COPY P1.4 49 I/O I/O BG/DK P1.5 50 I/O O SVHS_COMB P1.6 51 I/O O VOL P1.7 52 I/O P2.0 15 I I KEYB P2.1 16 I I PERI1 P2.2 17 I I PERI2 P2.3 18 I P3.0 21 I/O O ON/OFF P3.1 22 I/O O TxD P3.2 23 I/O I/O SCART1/2 P3.3 24 I/O I RC5 P3.4 25 I/O I/O BG/L_PIP P3.5 26 I/O I/O AV1/AV2_PIP P3.6 27 I/O O MSP_RESET P3.7 28 I/O P4.2 31 I/O I TUN_SELECT1 P4.3 32 I/O

XTAL2 34 O

XTAL1 35 I

RESET 33 I

DDA

SSA

R 38 O Red colour signal output G 39 O Green colour signal output B 40 O Blue colour signal output BLANK/ COR

HS/SSC 19 I

CVBS 12 I CVBS (video signal) input

Pin No.

2.5

3.3

11,30,47 S Power supply voltage 10,29,43 S Ground (0 V)

Output (O) Supply (S)

Port 0 is an 8-bit open drain bi-directional I/O port. Port 0 pins that have 1s written to them float; in this state they can be used as high-impedance inputs (e.g. for software driven Bus).

Port 1 is an 8-bit bi-directional multifunctional I/O port with internal pull-up resistors.

Port 2 is a 4-bit input port without pull-up resistors. Port 2 also works as analogue input for the 4-channel-ADC.

Port 3 is an 8-bit bi-directional I/O port with internal pull-up resistors.

Port 4 is a bi-directional I/O port Output of the inverting oscillator amplifier. Input to the inverting oscillator amplifier A low level on this pin resets the

9, 42 S Power supply voltage for RGB

13, 37 S

14, 36 S Ground (0 V) for Slicer and ADC

41 O

20 I/O Vertical sync input for display

processor

Power supply voltage for Slicer and ADC

Blanking output/ Contrast Reduction output Horizontal sync input (alternative sandcastle sync input) for display

Function

EV PINING

UNCTION

I/0

I/O IIC-SCL

I/O Z_COR

I ADC3

IRxD

I TUN_SELECT2

SDA5553

24C16

Pin No. Function

1 Internal N.C. 2 Internal N.C. 3 Internal N.C. 4 Ground 5 Seral Adress/Data 6 Serial Clock 7 Write Protect Input 8 Supply voltage input

VSS

24C16

VCC

SCL

SDA

Page 21

TDA4605-2

Pin No. Function

1 Information Input Concerning Secondary Voltage 2 Information Input Regarding the Primary Current 3 Input for Primary Voltage Monitoring 4 Ground 5 Output 6 Supply Voltage Input 7 Input for Soft-Start and Integrator Circuit 8 Input for the Feedback of the Oscillator

U4468B

Pin No. Function

1 `IF` input 2 `IF` input 3 Capacitor for AGC` time constant 4 Capacitor for internal reference voltage 5 Loop filter 6 A.F. output (AM sound) 7 Standard switch 8 Reference VCO L.C. network 9 Reference VCO L.C. network 10 AM mute switch 11 not connected 12 Sound IF output (FM` sound) 13 Ground 14 Supply voltage 5V 15 not connected 16 not connected

sw,AGC

o,AM

VCO

U_R

U_PIS

U_PUD

GND

i,IF

AGC

REF

TDA4605-2

U4468B

U_ZCD

U_SST

U_S

OUT

n.c.

GND

n.c.

o,FM

sw,mute

VCO

TDA4445B

Pin No. Function

1 `IF` input 2 not connected 3 IF `AGC` time constant 4 not connected 5 Average capacitor 6 A.F. output (AM sound) 7 not connected 8 Reference L.C. network 9 Reference L.C. network 10 not connected 11 Supply voltage 12V 12 Sound IF output (FM` sound) 13 Ground 14 not connected 15 not connected 16 `IF` input

i,IF

n.c.

AGC

n.c.

o,AM

n.c.

VCO

15 14

i,IF

n.c.

GND

o,FM

n.c.

VCO

Page 22

MSP3411G (MSP3401G, MSP3405G, MSP3415G)

PIN Pin Name Short Description

1 TP Test pin 2 AUD_CL_OUT Audio clock output 3 D_CTR_I/O_1 D_CTR_I/O_1 4 D_CTR_I/O_0 D_CTR_I/O_0 5 ADR_SEL I2C Bus address select 6 STANDBYQ Stand-by (low-active) 7 I2C_CL I2C clock 8 I2C_DA I2C data 9 I2S_CL I2S clock 10 I2S_WS I2S word strobe 11 I2S_DA_OUT I2S data output 12 I2S_DA_IN1 I2S1 data input 13 ADR_DA ADR data output 14 ADR_WS ADR word strobe 15 ADR_CL ADR clock 16 DVSUP Digital power supply 5 V 17 DVSS Digital ground 18 I2S_DA_IN2 I2S2-data input 19 NC Not connected 20 RESETQ Power-on-reset 21 DACA_R Headphone out, right 22 DACA_L Headphone out, left 23 VREF2 Reference ground 2 24 DACM_R Loudspeaker out, right 25 DACM_L Loudspeaker out, left 26 DACM_SUB Subwoofer output 27 SC2_OUT_R SCART output 2, right 28 SC2_OUT_L SCART output 2, left 29 VREF1 Reference ground 1 30 SC1_OUT_R SCART output 1, right 31 SC1_OUT_L SCART output 1, left 32 CAPL_A Volume capacitor AUX 33 AHVSUP Analog power supply 8 V 34 CAPL_M Volume capacitor MAIN 35 AHVSS Analog ground 36 AGNDC Analog reference voltage 37 SC3_IN_L SCART 3 input, left 38 SC3_IN_R SCART 3 input, right 39 SC2_IN_L SCART 2 input, left 40 SC2_IN_R SCART 2 input, right 41 SC1_IN_L SCART 1 input, left 42 SC1_IN_R SCART 1 input, right 43 VREFTOP Reference voltage IF 44 MONO_IN Mono input 45 AVSS Analog ground 46 AVSUP Analog power supply 5 V 47

ANA_IN1 48 49 50 TESTEN Test pin 51 XTAL_IN Crystal oscillator 52 XTAL_OUT Crystal oscillator

ANA_IN

ANA_IN2

−

IF input 1 IF common IF input 2

Page 23

PCB LAYOUTS

VK-E9TM

TPA-CG

Page 24

EXPLODED VIEW S28AG/S 12S0

Pos. On Pict. Description Qty Ident.Nr. Code

--EXPLODED VIEW – DR AWING--

1 REMOTE HANDSET PR 108 2 IR, LED GLASS 1 431976 3 MODULE TPA-CG SE 95250 1 441159 4 BUTTON FOR MAIN SWITCH 1 439334 5 BUTTONS UE 1 439334 6 HOUSING S28“ SI 1 444455 7 MAIN SWITCH 1 438101 8 LOUDSPEAKER 8Ω 15W 2 420717

9 COLOUR PICTURE TUBE A 66 EHJ 1 438152 10 DEGAUSSING COIL 28“ 1 444802,444765 11 CHASSIS FRAME 1 444849 12 MAIN CHASSIS 12 P/I N (S.B. = 20-81-40-00-00) 1 443006 13 MODULE VK-E9 SE 96320 1 441651 14 BACK COVER 28“ SI 1 437085

GRUNDIG

1 441838 1 444872

Page 25

LIST OF RECOMMENDED SPARE PARTS FOR CHASSIS AND MODULES

CODE VALUE POSITION

MAIN CHASSIS

412499 C/EL 220U M400V C-12642 415949 C/EL PR 5,0 2U2 M350V C-12709 5,0 338557 C/EL PR 5,0 10U T250V C-12606 5,0 414794 C/EL PR 5,0 47U M160V C-12605 5,0 415947 C/EL TR 5,0 1U0 M250V C-12714 5,0 412517 C/CE/Y/2E4/Z NR12,5 2N2M400VAC C-12645 413778 CMPP 22,5 U33 J 250V C-12707 413782 C/MPP PR * U68 M 250V C-12715 338584 C/PP 22,5 U011 J 1,6KV C-12711 22,5 338585 C/PP 22,5 U033 J 1KV C-12713 22,5 415936 C/PP PR * U033 K 630V C-12627 415937 C/PP PR15,0 220P J 1,6KV C-12625 15,0 429609 C/X2 PR* U47 M 275VAC C-12641 429610 C/X2 U10 M 275VAC C-12646 15,0 429611 C/X2 U22 M 275VAC C-12636 22,5 313551 D/SI/1N4001 TA D-12701 12,5 313551 D/SI/1N4001 TA D-12702 12,5 51666 D/SI/1N4148 TA D-12104 10,0 51666 D/SI/1N4148 TA D-12106 10,0 51666 D/SI/1N4148 TA D-12109 12,5 51666 D/SI/1N4148 TA D-12601 12,5 51666 D/SI/1N4148 TA D-12606 12,5 51666 D/SI/1N4148 TA D-12705 12,5 51666 D/SI/1N4148 TA D-12710 12,5 412464 D/SI/BAT85 D-12108 17,5 324669 D/SI/BY228 TA D-12706 20,0/H10 410680 D/SI/BYW74 TA D-12708 20,0/H10 410680 D/SI/BYW74 TA D-12607 15,0/H10 410680 D/SI/BYW74 TA D-12609 15,0/H10 410680 D/SI/BYW74 TA D-12614 15,0/H10 424580 D/SI/BYT52G D-12302 12,5 424580 D/SI/BYT52G D-12604 12,5 424580 D/SI/BYT52G D-12703 12,5 424580 D/SI/BYT52G D-12704 12,5 424580 D/SI/BYT52G D-12709 12,5 424279 D/SI/BYT52M TA D-12608 12,5 415931 D/SI/BYW54 TA D-12610 12,5 415931 D/SI/BYW54 TA D-12611 12,5 415931 D/SI/BYW54 TA D-12612 12,5 415931 D/SI/BYW54 TA D-12613 12,5 417320 D/SI/BYW95C TA D-12602 15,0/H10 417320 D/SI/BYW95C TA D-12707 15,0/H5 68571 DIODE Z/ 2,7V/C/0,5W D-12711 10,0 304326 DIODE Z/33 V/C/0,5W TA D-12603 12,5 435879 MAINS CHOKE 2X70 mH DU-12602 439745 IC SDA5553-A009/EV E945 IC-12001 429960 IC AT24C08-10PC IC-12002

Page 26

CODE VALUE POSITION

MAIN CHASSIS

415922 IC LM317T IC-12004, IC-12005 415922 IC LM317T IC-12602, IC-12604 427444 IC TDA8843/N2C IC-12101 419821 IC TDA7057AQ IC-12102 366430 IC TEA2014 IC-12104 425757 IC TDA8351 IC-12301 438568 IC U4468B IC-12501 430973 IC MSP3415G PSDIP52 IC-12503 415921 IC TDA4605-2 IC-12601 415923 IC MC7808T IC-12603 419715 IC 74HCT4053 IC-12801 444164 TUNER TEDE9-226A TUN-12101 68503 IC SOCKET 8 FOR IC-12002 426141 HEADER 7/2,5 K-12102A 426141 HEADER 7/2,5 K-12901A 423427 CONNECTOR M/ / 4/2,5 MKS1954 K-12701 424019 CONNECTOR M/ 3/2,5 90647-1003 K-12301A 423988 CONNECTOR M/ 4/2,5 90647-1004 K-12702A 423989 CONNECTOR M/ 5/2,5 90647-1005 K-12104A 319045 CRYSTAL 4,4 MHz Q-12101 431081 CRYSTAL 6 MHz Q-12001 439430 CRYSTAL 18,432 MHZ Q-12501 316831 FUSE HOLDER FOR VA-12601 316831 FUSE HOLDER FOR VA-12602 316831 FUSE HOLDER FOR VA-12603 421055 METAL SHIELD EMC E6/E7 MP-12101 79039 PASTE SILICON P12 FOR HEATSINK T-12705 410208 MICA WASHER FOR IC-12602 410208 MICA WASHER FOR IC-12604 338708 MICA WASHER FOR T-12602 338569 R/PL TA R47 J 0,5 W R-12703 15,0 415965 R/PL TA 5K1 J 0,33 W R-12610 10,0 433775 R/MF 220K J 3,5kV R-12615 12,5 372123 R/FUSIBLE TA 2R2 J 0,33W R-12156 15,0/H10 372123 R/FUSIBLE TA 2R2 J 0,33W R-12715 15,0/H10 411573 R/FUSIBLE R39 K 0,75W R-12140 15,0/H10 421131 R/FUSIBLE TA 47R J 0,33W R-12304 20,0/H10 421131 R/FUSIBLE TA 47R J 0,33W R-12609 15,0/H10 415009 R/FUSIBLE TA 1K J 0,5 W R-12707 15,0/H10 411572 R/FUSIBLE TA R15 K 0,75W R-12622 15,0/H10 411574 R/FUSIBLE TA R22 K 0,4 W R-12710 15,0/H15 411574 R/FUSIBLE TA R22 K 0,4 W R-12713 15,0/H15 419823 R/PLK 0204 TA 2K05 F 0,25 W R-12618 12,5 69833 R/CL 0204 TA 8K2 J 0,33 W R-12118 10,0 330380 R/PLK 0204 TA 3K F 0,25 W R-12308 12,5 429553 R/PLK 0204 TA 39K F 0,25 W R-12122 12,5 419824 R/PLK 0204 TA 243R F 0,25 W R-12052, R-12044 10,0 419824 R/PLK 0204 TA 243R F 0,25 W R-12616, R-12623 12,5 419825 R/PLK 0204 TA 715R F 0,25 W R-12625 12,5 416940 R/HV TA 220K J 1 kV R-12701 12,5

Page 27

CODE VALUE POSITION

MAIN CHASSIS

433776 R/HV TA 820K J 1,6KV R-12613 12,5 420920 R/MOX TA 1R0 J 1W R-12306 20,0/H10 316701 R/PLKO TA R82 J 1 W R-12702 15,0 429521 R/PLKO TA 2R7 J 4 W R-12714 20,0/H15 419822 R/PLKO TA 10R J 2 W R-12725 20,0/H20 416508 R/PLKO TA 22K J 2 W R-12603 20,0/H15 415953 R/PLKO TA 27K K 4 W R-12624 35,0/H20 415952 R/PLKO TA 47K J 1,5 W R-12606 20,0/H10 429522 R/PLKO TA 75K J 4 W R-12604 20,0/H15 316651 R/MOX TA 180R K 1,5W R-12305 20,0/H10 68544 R/PTC - DEGAUSSING R-12628 338709 CLIP IC FOR IC-12102, IC-12301 338709 CLIP IC FOR IC-12602, IC-12604 338709 CLIP IC FOR T-12602, T-12701 422699 CLIP IC FOR T-12705 423137 T/FET/BUZ90A T-12602 338580 T/NPN/AF/BC639 TR T-12703 411262 T/NPN/BC547B TR T-12003, T-12004, T-12005 411262 T/NPN/BC547B TR T-12006, T-12007, T-12009 411262 T/NPN/BC547B TR T-12010, T-12104, T-12105 411262 T/NPN/BC547B TR T-12108, T-12501, T-12601 411262 T/NPN/BC547B TR T-12603, T-12702, T-12706 415900 T/NPN/BU508AF T-12701 415928 T/NPN/PH2369 TR T-12008, T-12109 415928 T/NPN/PH2369 TR T-12801, T-12802 411261 T/PNP/BC212B/BC557B TR T-12107, T-12110, T-12704 414036 T/PNP/BD242 T-12705 425763 TRANSFORM. SMPS E9 110 TR-12601 435877 TRANSFORM.HV E9 TR-12701 378773 TRANSFORM. DRIVER TR-12702 339150 LINEARITY COIL 12-25 L-12701 420742 COIL 550UH L-12703 437560 POWER FACTOR CORRECTION COIL PFC 21108 FUSE T 1,25 A L 250V VA-12601, VA-12602 431998 FUSE T 2 A E 250V VA-12603

MODULES

MODULE VK-E9TM

415032 C/EL 5,0 2U2 M250V C-9202 5,0 300874 D/SI/1N4003 TA D-9205 12,5 425755 IC TDA6107Q IC-9201 435872 CRT SOCKET B10-277 0330 550034 PD-9201 411567 R/FUSIBLE TA 120R J 0,75W R-9210 20,0/H10 339317 R/CL TA 2R2 J 1,5W R-9207 20,0/H10 338709 CLIP IC FOR IC-9201 426035 VARISTOR 35V VAR-9201

MODULE TPA-CG

425987 IC TSOP IR-91001 420171 D/LED R/G D-91001 411262 T/NPN/BC547B TR T-91001, T-91002 441536 FUNCTION KEY TI-1…TI-5

Page 28

MANUFACTURING PARTS FOR TV S28AG/S 12S0

Pos. On Pict. Description Qty(pcs) Ident.Nr. Code

--EXPLODED VIEW – DR AWING--

1 REMOTE HANDSET PR 108 GRUNDIG 1 444872

2 IR, LED GLASS 1 431976

3 MODULE TPA-CG SE 95250 1 441159

4 BUTTON FOR MAIN SWITCH 1 439334

5 BUTTONS UE 1 439334

6 HOUSING S28“ SI 1 444455

7 MAIN SWITCH 1 438101

8 LOUDSPEAKER 8Ω 15W 2 420717

9 COLOUR PICTURE TUBE A 66 EHJ 1 438152

10 DEGAUSSING COIL 28“ 1 444802,444765 11 CHASSIS FRAME 1 444849 12 MAIN CHASSIS 12 P/I N (S.B. = 20-81-40-00-00) 1 443006 13 MODULE VK-E9 SE 96320 1 441651 14 BACK COVER 28“ SI 1 437085

User manuals 2 444957 & 444958 Battery R6S 2 422401 Designation relief “GRUNDIG” 1 438887 SCREW A 2,9X9,5 for main sw. & mod. TPA-CG 4 18149 SCREW A 3,9X9,5 for back cover 1 89338 SCREW A 5,5X44 for back cover 2 421535 SCREW A 3,5X16 for back cover 4 435136 SCREW B 7X32 for picture tube 4 420407 SCREW A 3,5X9,5 for loudspeakers 8 26495 Distance holder 28” 4 427206 Washer for picture tube 4 439451 Chassis holder 16:9 28” 1 428634 CRT carrier 2 431984 CABLE for loudspeakers 1 436596 CABLE for defl. yokes 1 436766 Soldering wire 1,5 1,6g 26575 Cartoon box with packaging 1 444454 & 444453 Spring for mains button 1 431975 Driller with base 1 77578 Spec clean. agent 1ml 378986

1 441838

Page 29

CIRCUIT DIAGRAM OF MAIN CHASSIS E12

Page 30

OSCILLOGRAMS

Page 31

ELECTRICAL DIAGRAMS OF SEPARATE MODULES OF CHASSIS E12

NOTES: