1

CONTENTS

Safety Precautions ........................................................................................................................................... 2

TV Set switched off ........................................................................................................................................... 2

Measurements ................................................................................................................................................. 2

PERI -TV SOCKET ............................................................................................................................................ 2

SCART 1, SCART 2 .......................................................................................................................................... 2

INTRODUCTION .............................................................................................................................................. 2

SWITCH-MODE POWER SUPPLY (TDA 16846) .............................................................................................. 3

IF PART (TDA 4470/72) ..................................................................................................................................... 3-4

TUNER ............................................................................................................................................................. 4-5

SAW FILTERS ................................................................................................................................................... 5

DIGITAL TV SOUND PROCESSING (MSP 3410D) .......................................................................................... 5-6

DOLBY PRO LOGIC PROCESSOR IC (DPL 3519A) ....................................................................................... 6-7

HEADPHONE OUTPUT (TDA 1308) ................................................................................................................ 7

VIDEO OUTPUT (TDA 7265) ............................................................................................................................ 7-8

VIDEO INPUT AND OUTPUT SOURCE SWITCHING (TEA 6415) ................................................................... 8

VIDEO OUTPUT AMPLIFIER STAGE (TDA6111Q) ........................................................................................... 8-9

VERTICAL OUTPUT STAGE (TDA 9379FA) ...................................................................................................... 9

TTEXT CONTROLLER (SDA 5550M) ............................................................................................................... 9-10

SERIAL ACCESS 32K EEPROM (24L32-W) .................................................................................................... 10-11

EPROM (M27W401) ......................................................................................................................................... 11

100Hz FEATURE BOX ...................................................................................................................................... 11

VPC32X5 (VIDEO PROESSOR) ................................................................................................................. 11

CIP3250 ...................................................................................................................................................... 12-13

SDA9400 ..................................................................................................................................................... 13-14-15

DDP3310 .................................................................................................................................................... 15-16

AK41 CHASSIS MANUALADJUSTMENTS PROCEDURE ............................................................................... 17

PRELIMINARY ............................................................................................................................................. 17

SYSTEM VOLTAGEAJUSTMENT ................................................................................................................ 17

AFCADJUSTMENT ..................................................................................................................................... 17

FOCUSADJUSTMENT ................................................................................................................................17

SCREEN ADJUSTMENT ............................................................................................................................. 17

IF ADJUSTMENT FOR L’MODE ................................................................................................................... 17

AK41 CHASSIS PRODUCTION MODE ADJUSTMENTS PROCEDURE ......................................................... 18

PRELIMINARY ............................................................................................................................................. 18

HORIZONTALAND VERTICAL GEOMETRY ALIGNMENTS ........................................................................ 18

V-SHIFT ....................................................................................................................................................... 18

V-SIZE .......................................................................................................................................................... 18

H-SHIFT ...................................................................................................................................................... 18

H-SIZE ......................................................................................................................................................... 18

S-COR ......................................................................................................................................................... 18

LINRT .......................................................................................................................................................... 18

ANGLE ........................................................................................................................................................ 18

BOW ... ........................................................................................................................................................ 18

TRPEZ ......................................................................................................................................................... 18

PARAB ......................................................................................................................................................... 18

U.COR ......................................................................................................................................................... 19

L.COR ......................................................................................................................................................... 19

VIDEO ALIGNMENTS ........................................................................................................................................ 19

RGn, GGn, BGn,:WHITE BALANCE ADJUSTMENT .................................................................................... 19

RRf, GRf, BRf .............................................................................................................................................. 19

YDF . ........................................................................................................................................................... 19

AGC . .......................................................................................................................................................... 19

TLAN . .......................................................................................................................................................... 19

APS . ........................................................................................................................................................... 19

T_T ............................................................................................................................................................ 19

T_P ............................................................................................................................................................ 19

EXT3 ............................................................................................................................................................ 19

CLT ............................................................................................................................................................ 19

SERVICE ALIGNMENTS ................................................................................................................................... 20

IMPORTANT ................................................................................................................................................ 20

ADJUSTMENTS GROUOP.......................................................................................................................... 20

OPTIONS GROUP ...................................................................................................................................... 20

SYSTEM GROUP ........................................................................................................................................ 20

GENERAL BLOCK DIAGRAM OF CHASSISAK41 ........................................................................................... 21

CIRCUIT DIAGRAMS ........................................................................................................................................ 22