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050-200320A
TOSHIBA
SERVICE MANUAL
COLOUR TELEVISION
28H37G
AK52 Chassis
PRINTED IN UK. 2002 C
SM52-DRX_IF
TABLE OF CONTENTS
1.INTRODUCTION.......................................................................................................................... 1
2.TUNER........................................................................................................................................ 1
3.IF PART (DRX 3960A) ................................................................................................................. 1
4.VIDEO SWITCH TEA6415............................................................................................................ 2
5.MULTI STANDARD SOUND PROCESSOR .................................................................................. 2
6.SOUND OUTPUT STAGE WITH TDA7480L ................................................................................. 2
7.VERTICAL OUTPUT STAGE WITH TDA8177F............................................................................. 2
8.VIDEO OUTPUT AMPLIFIER TDA6109........................................................................................ 2
9.POWER SUPPLY (SMPS)............................................................................................................ 3
10.MICROCONTROLLER SDA5550................................................................................................ 3
10.1.General Features................................................................................................................ 3
10.2.External Crystal and Programmable Clock Speed.............................................................. 3
10.3.Microcontroller Features.................................................................................................... 3
10.4.Memory .............................................................................................................................. 3
10.5.Display Features................................................................................................................. 3
10.6.ROM Characters................................................................................................................. 3
10.7.Acquisition Features.......................................................................................................... 4
10.8.Ports................................................................................................................................... 4
11.SERIAL ACCESS 32K EEPROM ................................................................................................ 4
12.CLASS AB STEREO HEADPHONE DRIVER TDA1308............................................................... 4
13.SAW FILTERS ........................................................................................................................... 4
14.IC DESCRIPTIONS .................................................................................................................... 4
14.1.TDA6109 ............................................................................................................................. 5
14.1.1.General Description ..................................................................................................... 5
14.1.2.Features....................................................................................................................... 5
14.1.3.Pinning......................................................................................................................... 5
14.2.27W401 ............................................................................................................................... 5
14.2.1.Description................................................................................................................... 5
14.2.2.Features....................................................................................................................... 5
14.2.3.Connections................................................................................................................. 6
14.3.24LC32A............................................................................................................................. 6
14.3.1.Description................................................................................................................... 6
14.3.2.Features....................................................................................................................... 6
14.3.3.Pin Descriptions........................................................................................................... 7
14.4.SDA5275............................................................................................................................. 7
14.4.1.Features....................................................................................................................... 7
14.4.2.Pin Definition and functions......................................................................................... 8
14.5.DRAM 4MX4........................................................................................................................ 9
14.5.1.General Description ..................................................................................................... 9
14.5.2.Features....................................................................................................................... 9
14.5.3.Pin Assignment............................................................................................................ 9
14.6.SDA9400............................................................................................................................10
14.6.1.General Description ....................................................................................................10
14.6.2.Features......................................................................................................................10
14.6.3.Pin Definition ..............................................................................................................11
14.7.LM317T ..............................................................................................................................11
14.7.1.Description..................................................................................................................11
14.7.2.Features......................................................................................................................11
14.8.DDP3310............................................................................................................................12
14.8.1.Description..................................................................................................................12
14.8.2.Features......................................................................................................................12
14.8.3.Pin connection and short descriptions .......................................................................12
14.9.SDA5550............................................................................................................................14
14.9.1.General definition........................................................................................................14
14.9.2.Features......................................................................................................................14
14.10.TEA6415C........................................................................................................................15
14.10.1.General Description ..................................................................................................15
14.10.2.Features....................................................................................................................15
14.10.3.Pinning......................................................................................................................16
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14.11.VPC3230D........................................................................................................................16
14.11.1.General Description ..................................................................................................16
14.11.2.Pin Connections and Short Descriptions ..................................................................16
14.12.TDA1308T ........................................................................................................................18
14.12.1.General Description ..................................................................................................18
14.12.2.Features....................................................................................................................18
14.12.3.Pinning......................................................................................................................18
14.13.MSP34X1G (MSP3411G) ..................................................................................................18
14.13.1.Description................................................................................................................18
14.13.2.Features....................................................................................................................19
14.13.3.Pin connections ........................................................................................................20
14.14.TL431...............................................................................................................................21
14.14.1.Description................................................................................................................21
14.14.2.Features....................................................................................................................21
14.14.3.Pin Configurations ....................................................................................................21
14.15.DRX3960A .......................................................................................................................22
14.15.1.Introduction...............................................................................................................22
14.15.2.Features....................................................................................................................22
14.15.3.Pin connection and short descriptions .....................................................................22
14.16.LM7808 ............................................................................................................................23
14.16.1.Description................................................................................................................23
14.16.2.Features....................................................................................................................23
14.17.BDX53BFI ........................................................................................................................23
14.17.1.Description................................................................................................................23
14.17.2.Applications..............................................................................................................23
14.18.TDA8177F ........................................................................................................................24
14.18.1.Description................................................................................................................24
14.18.2.Features....................................................................................................................24
14.18.3.Pin connections ........................................................................................................24
14.18.4.Block Diagram...........................................................................................................24
14.19.LM1086 ............................................................................................................................24
14.19.1.Description................................................................................................................24
14.19.2.Features....................................................................................................................24
14.19.3.Applications..............................................................................................................25
14.19.4.Connection Diagrams................................................................................................25
14.20.MC44608 ..........................................................................................................................25
14.20.1.Description................................................................................................................25
14.20.2.General Features.......................................................................................................25
14.20.3.Pin Connections........................................................................................................26
14.21.TCET1102G......................................................................................................................26
14.21.1.Description................................................................................................................26
14.21.2.Applications..............................................................................................................26
14.21.3.Features....................................................................................................................26
14.22.TDA7480L ........................................................................................................................27
14.22.1.Description................................................................................................................27
14.22.2.Features....................................................................................................................27
14.22.3.Pin Functions............................................................................................................27
14.23.SAA3010T ........................................................................................................................27
14.23.1.Description................................................................................................................27
14.23.2.Features....................................................................................................................28
14.23.3.Pinning......................................................................................................................28
15.AK52 CHASSIS MANUAL ADJUSTMENTS PROCEDURE ........................................................28
15.1.PRELIMINARY ...................................................................................................................28
15.2.SYSTEM VOLTAGE ADJUSTMENTS..................................................................................28
15.3.AFC ADJUSTMENTS .........................................................................................................28
15.4.FOCUS ADJUSTMENTS.....................................................................................................29
15.5.SCREEN ADJUSTMENTS ..................................................................................................29
15.6.IF ADJUSTMENT FOR L' MODE.........................................................................................29
16.AK52 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS ............................................30
16.1.PRELIMINARY ...................................................................................................................30
16.2.H/V (HORIZONTAL AND VERTICAL GEOMETRY ALIGNMENTS).......................................30
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16.3.VIDEO ALIGNMENTS .........................................................................................................33
16.4.SERVICE ALIGNMENTS.....................................................................................................34
17.BLOCK DIAGRAM ....................................................................................................................36
18.CIRCUIT DIAGRAMS................................................................................................................37
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1.INTRODUCTION
11AK52 is a 100Hz flicker free colour television capable of driving 28"4:3/16:9, 32" 16:9, 33"4:3 and
29"4:3 real flat picture tubes.
The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple
transmission standards as B/G, D/K, I/I', and L/L