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S/M No. : TWP795MEF0

Service Manual
Color Television 66cm Wide Stereo
CHASSIS : WP-795
Model : DWP-28W2ZZF
DWP-28W2ZLF

Specification
Items Model DWP-28W2ZZF/DWP-28W2ZLF
TV Standard PAL-SECAM B/G D/K,PAL I/I,SECAM L/L
Sound System NICAM B/G,I,D/K,L, FM2Carrier B/G, D/K
Power Consumption 70W approx.
Sound Output Power 6W X 2(at60% mod, 10%THD)
Speaker 12W 8 ohm X 2
Teletext System 10page memory FASTEXT(FLOF or top)
Aerial input 75ohm unbalanced
Channel coverage Off-air channels, S-cable channels and hyperband
Tuning System Frequency synthesiser tuning system
Visual screen size 66cm(wide screen)
Channel indication On Screen Display
Program Selection 100programmes
EURO-SCART1: Audio/Video In and Out,
R/G/B In, slow and fast switching.
Aux. terminal EURO-SCART2:Audio/Video In and Out, S-VHS In.
Audio-Video Jack on front of cabinet in common
connection with EURO-SCART2.
Headphone jack(3.5mm)on front of cabinet
Remote Control Unit R-40A13

DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr Dec. 2000
TABLE OF CONTENTS

MAIN FEATURES................................................................................................................................ 2
SPECIFICATIONS ........................................................................................................................................... 2
CHANNEL TABLE............................................................................................................................................ 4
SAFETY INSTRUCTION...................................................................................................................... 9
CIRCUIT BLOCK DIAGRAM............................................................................................................... 10
ALIGNMENT INSTRUCTIONS ............................................................................................................ 11
MICROCONTROLLER CONFIGURATION:SERVICE MODE......................................................................... 11
MICROCONTROLLER CONFIGURATION:OPTION....................................................................................... 11
TV SET ALIGNMENT....................................................................................................................................... 11
SCHEMATIC DIAGRAM...................................................................................................................... 14
EXPLODED VIEW ............................................................................................................................... 15
PRINTED CIRCUIT BOARD................................................................................................................ 16
ELECTRICAL PARTS LIST................................................................................................................. 17

APPENDIX (Appendix is provide only by internet [http://svc.dwe.co.kr])

IC DESCRIPTION ................................................................................................................................ 1
TDA936X TV SIGNAL PROCESSOR-TELETEXT DECODER WITH EMBEDDED U-CONTROLLER........... 1
MSP3415D MULTISTANDARD SOUND PROCESSOR ................................................................................. 9
TDA894XJ STEREO AUDIO AMPLIFIER........................................................................................................ 13
TDA835XJ VERTICAL AMPLIFIER ................................................................................................................. 14
TDA6107Q ....................................................................................................................................................... 17
24C16 16Kbit EEPROM................................................................................................................................... 18
STR-F6653....................................................................................................................................................... 19
CIRCUIT DISCRIPTION....................................................................................................................... 21
BLOCK DIAGRAM ........................................................................................................................................... 21
IF ...................................................................................................................................................................... 25
SOURCE SWITCHING .................................................................................................................................... 27
U-CONTROLLER I/O PIN CONFIGURATION AND FUNCTION..................................................................... 27
SOUND PROCESSING ................................................................................................................................... 28
SOUND AMPLIFICATION................................................................................................................................ 31
VERTICAL DEFLECTION................................................................................................................................ 31
POWER SUPPLY ............................................................................................................................................ 33
TV START-UP, TV NORMAL RUN AND STAND-BY MODE OPERATIONS.................................................. 37

1
Service manual WP-795
1 - Main features
1-1 Specifications

TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L'
Sound system NICAM B/G, I, D/K, L,
FM 2Carrier B/G, D/K
Power consumption 70 W approx.
Sound Output Power 6Wx 2 (at 60% mod, 10%THD)
Speaker 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 66cm (Wide Screen)
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, S-VHS In.
Audio-Video Jack on front of cabinet in common connection with
EURO-SCART 2.
Headphone jack (3.5 mm) on front of cabinet
Remote Control Unit R-40A13

21 Pin EURO-SCART 1 :

Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod )
2 Audio Input Right 0.5 Vrms, Impedance > 10 k
3 Audio Output Left 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod )
4 Audio Earth
5 Blue Earth
6 Audio Input Left 0.5 Vrms, Impedance > 10 k
7 Blue Input 0.7 Vpp