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P/N:TCP520BEF0
Service Manual
COLOR TELEVISION
CHASSIS : CP-520
MODEL : DTY-28A8/28A6/28A7
DTY-2880/28W5
DTY-21U7/21B4
DTY-25G6/25G7
CHASSIS : CP-520A
MODEL : DTC-20T2
DTC-21Y1/21Y2
CHASSIS : CP-520F
MODEL : DTZ-29U7/U3
DTZ-2881/28W8
DTZ-2481
Caution
: In this Manual, some parts can be changed for improving. their
performance without notice in the parts list. So, if you need the
latest parts information, please refer to PPL(Parts Price List)in
Service Information Center(http://svc.dwe.co.kr)
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr June. 2004
CP-520/520A/520F Service Manual
CONTENTS
DOCUMENT HISTORY................................................................................................................. 3
1 MAIN FEATURES.................................................................................................................. 4
1.1 SPECIFICATIONS.......................................................................................................... 4
1.1.1 GENERAL................................................................................................................ 4
1.1.2 EURO-SCART 1 (21 Pin)......................................................................................... 4
1.1.3 EURO-SCART 2 (21 Pin)......................................................................................... 5
1.2 CHANNEL/FREQUENCY TABLE .................................................................................. 6
2 SAFETY INSTRUCTION ....................................................................................................... 9
3 ALIGNMENT INSTRUCTIONS ............................................................................................ 10
3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE ................................... 10
3.2 SERVICE MODE NAVIGATION ................................................................................... 10
3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS........................................ 10
3.4 OPTION 1 ..................................................................................................................... 11
3.5 OPTION 2 ..................................................................................................................... 11
3.6 NVM DEFAULT SETTING............................................................................................ 12
3.7 TV SET ALIGNMENT ................................................................................................... 14
3.7.1 G2 ALIGNMENT .................................................................................................... 14
3.7.2 WHITE BALANCE ................................................................................................. 14
3.7.3 FOCUS .................................................................................................................. 14
3.7.4 VERTICAL GEOMETRY........................................................................................ 14
3.7.5 HORIZONTAL PICTURE CENTRING ................................................................... 14
3.7.6 EAST / WEST CORRECTION ............................................................................... 14
3.7.7 AGC ....................................................................................................................... 15
4 IC DESCRIPTION ................................................................................................................ 16
4.1 UOC III SERIES ............................................................................................................. 16
4.1.1 IC MARKING AND VERSION................................................................................ 16
4.2 TDA8946J STEREO AUDIO AMPLIFIER .................................................................... 24
4.2.1 FEATURES............................................................................................................ 25
4.3 TDA8358J VERTICAL AMPLIFIER ............................................................................. 27
4.3.1 TDA8358J.............................................................................................................. 27
4.4 TDA6107AJF................................................................................................................ 29
4.4.1 Features................................................................................................................. 29
4.4.2 Pin description ....................................................................................................... 29
4.5 24WC16 - 16 KB EEPROM .......................................................................................... 30
4.6 STR - F6653 ................................................................................................................. 31
4.6.1 GENERAL DESCRIPTION .................................................................................... 31
4.6.2 FEATURES............................................................................................................ 31
4.6.3 BLOCK DIAGRAM................................................................................................. 31
4.6.4 PIN DESCRIPTION ............................................................................................... 32
4.6.5 CONTROL PART - ELECTRICAL CHARACTERISTICS....................................... 32
4.6.6 MOSFET ELECTRICAL CHARACTERISTICS ...................................................... 33
5 CIRCUIT DESCRIPTION ..................................................................................................... 34
5.1 BLOCK DIAGRAM ....................................................................................................... 34
5.2 FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR ........................................... 35
5.2.1 Vision IF amplifier .................................................................................................. 35
5.2.2 QSS sound circuit .................................................................................................. 35
5.2.3 FM demodulator..................................................................................................... 35
5.2.4 Audio input selector and volume contro ................................................................. 36
DTV R&D Europe 1
CP-520/520A/520F Service Manual
5.2.4.1 STEREO AND AV STEREO VERSIONS ........................................................... 36
5.2.4.2 MONO VERSIONS ............................................................................................ 36
5.2.5 CVBS and Y/C input signal selection..................................................................... 36
5.2.5.1 ALL VERSIONS ................................................................................................. 36
5.2.6 Synchronisation circuit ........................................................................................... 37
5.2.7 Horizontal and vertical drive................................................................................... 38
5.2.8 Chroma, luminance and feature processing .......................................................... 38
5.2.9 Colour decoder ...................................................................................................... 39
5.2.10 RGB output circuit.................................................................................................. 40
5.2.11 I2C-BUS USER INTERFACE DESCRIPTION ....................................................... 42
5.3 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR.............. 42
5.3.1 Supported standards ............................................................................................. 43
5.4 FUNCTIONAL DESCRIPTION SOUND PROCESSOR ............................................... 44
5.4.1 The UOC III TV Sound Concept ............................................................................ 44
5.4.2 Functional Overview Of the digital controller sound part........................................ 45
5.4.3 Demodulator and decoder ..................................................................................... 46
6 SERVICE PARTS LIST ....................................................................................................... 49
6.1 DTY-28A8FZF-S........................................................................................................... 49
6.2 DTC-20T2FZS-S........................................................................................................... 54
6.3 DTC-21Y1FZF-S........................................................................................................... 59
6.4 DTZ-29U7FZS-S........................................................................................................... 64
7 EXPLODED VIEW ............................................................................................................... 69
7.1 DTY-28A8 ..................................................................................................................... 69
7.2 DTY-2880 ..................................................................................................................... 70
7.3 DTY-21U7..................................................................................................................... 71
7.4 DTC-20T2..................................................................................................................... 72
7.5 DTC-21Y1..................................................................................................................... 73
7.6 DTZ-29U7 ..................................................................................................................... 74
7.7 DTZ-2881...................................................................................................................... 75
7.8 DTZ-2481...................................................................................................................... 76
8 PRINTED CIRCUIT BOARD................................................................................................ 77
8.1 4859809693(CP-520) ................................................................................................... 77
8.2 4859809893(CP-520A)................................................................................................. 78
8.3 4859809993(CP-520F) ................................................................................................. 79
9 SCHEMATIC DIAGRAM...................................................................................................... 80
9.1 CP-520.......................................................................................................................... 80
9.2 CP-520A ....................................................................................................................... 81
9.3 CP-520F ....................................................................................................................... 82
DTV R&D Europe 2
CP-520/520A/520F Service Manual
DOCUMENT HISTORY
VERSION DATE COMMENTS
V1.00 12/05/04 Creation of document (Author JS KIM) for project CP520 50Hz TV.
DTV R&D Europe 3
CP-520/520A/520F Service Manual
1 MAIN FEATURES
1.1 SPECIFICATIONS
1.1.1 GENERAL
TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L'
Colour system Tuner PAL, SECAM
AV PAL, SECAM, PAL 60, NTSC M, NTSC 4.43
Sound system NICAM B/G, I, D/K, L,
FM 2Carrier B/G, D/K
Power 20",21" : 49W
consumption 21" (4:3) Flat : 59W
28" (4:3) : 69W
28"(16:9) : 69W
Sound Output 20" ~ 24" : 4.5W x 2 (at 60% mod, 10% THD)
Power 25" ~ 29" : 7W x 2 (at 60% mod, 10%THD)
Speaker 20" ~ 24" : 7.5W 8 ohm x 2
25" ~ 29" : 12W 8 ohm x2
Teletext system 10 pages memory FASTEXT (FLOF or TOP)
Aerial input 75 ohm unbalanced
Channel coverage Off-air channels, S-cable channels and hyperband
Tuning system frequency synthesiser tuning system
Visual screen size 20" : 48cm
21" : 51cm
28" : 66cm
Channel indication On Screen Display
Program Selection 100 programmes
Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B
In, Slow and Fast switching.
EURO-SCART 2 : Audio / Video In and Out, SVHS
In.
AV3 : Audio-Video Jack on front of cabinet.
Headphone jack (3.5 mm) on front of cabinet
SVHS3 (option) : Jack on front of cabinet