Daewoo DTW - 28W2F User manual

Service Manual
Colour Television 66 Cm WIDE STEREO
CHASSIS :WP-811N
DAEWOO ELECTRONICS CO.,LTD
http://svc.dwe.co.kr DEC.2000
MODEL :DTW - 28W2F
DTW - 2810F
S/M No: TWP811MEF0
Specifications
PAL/ SECAM-B/K, PAL-I/I', SECAM-L/L', NTSC-3.58/4.43 (Play back)
230V AC, 50Hz
75 ohm unbalanced input ( Din Standard )
TUNING SYSTEM
CRT
SYSTEM
MAIN VOLTAGE
OSD LANGUAGE
28" : W66ECK001X44
SOUND OUTPUT
DT5-BF14D
21 pin EURO-SCARTjack (AV input, TV output, RGB input)
RCAtype AV input jack
Frequency Systhesize (FS) Tuning System
NUMBER OF PROGRAM 100 program
AUX. TERMINAL
ANTENNAIMPEDANCE
REMOTE CONTROL
SPEAKER
POWER CONSUMPTION Stand-by mode : 2.0 Watts
Normal operating mode : 100 Watts
10 + 10 Watts, 10% THD at RF 60% mod. (1 kHz )
12W 8 ohm x 2 EA
TUNER
JACK AUDIO TERMINAL(AUDIO OUTL, R)
R-22D05(or R-23D05) with 2 "AAA" type batteries
TOP(5 Page memory) & FLOF(7 Page memory)
TELETEXT
21 pin EURO-SCARTjack (AV input, S-VHS input)
Headphone jack (3.5 mm )
- West option : English, German/Dutch/Flemish, French, Italian, Spanish/Portuguese,
Swedish/Finnish/Danish, Hungarian, Rumanian, Turkish
- East option : Polish, Czech/Slovak, Rumanian, Servo-croat, German/Dutch/Flemish,
French, Estonian, Lettish
- West : English, German, French, Italian, Spanish, Nethelands, Swedish
- East : English, Russian, Polish, Rumanian, Czech, Hungarian
✔ 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).
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1
TABLE OF CONTENTS
SAFETY INSTRUCTION .................................................................................................................. 2
SPECIFICATIONS ............................................................................................................................ 3
CIRCUIT BLOCK DIAGRAM ........................................................................................................... 4
ALIGNMENT INSTRUCTION ........................................................................................................... 5
SCHEMATIC DIAGRAM .................................................................................................................. 11
EXPLODED VIEW ............................................................................................................................ 13
PRINTED CIRCUIT BOARD ............................................................................................................ 15
SERVICE PARTS LIST .................................................................................................................... 16
APPENDIX (" Appendix is provided only by internet [http://svc.dwe.co.kr] ")
IC DESCRIPTION ............................................................................................................................. 1
IC DC VOLTAGE CHARTS .............................................................................................................. 18
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2
SAFETY INSTRUCTION
WARNING : Only competent service personnel may carry out work involving the testing or repair of this equipment
1. Excessive high voltage can prodece potentially haz-
ardous X-RAY RADIATION. To avoid such hazards,
the high voltage must not exceed the specified limit.
Thenominalvalueofthehighvoltageofthisreceiveris
25-27kv at max beam current. The high voltage must
not, under any circumstances, exceed 30kv.
Each time a receiver require servicing, the high volt-
age should be checked. It is imprortant to use an accu-
rate and reliable high voltage meter.
2.TheonlysourceofX-RAYRadiationinthisTVreceiver
is the picture tube. For continued X-RAY RADIATION
protection, the replacement tube must be exactly the
same type tube as specified in the parts list.
X-RAY RADIATION PRECAUTION
1. Potentials of high voltage are present when this
receiveris operating.Operation ofthe receiveroutside
the cabinet or with the back board removed involves a
shock hazard from the receiver.
1)Servicing should not be attempted by anyonewho is
not thoroughly familiar with the precautions neces-
sary when working on high-voltage equipment.
2) Dischange the high potential of the picture tube
before handling the tube. The picture tube is highly
evacuated and if broken, glass fragments will be
violently expelled.
2. If any Fuse in this TV receiver is blown, replace it with
the FUSE specified in the Replacement Parts List.
3. When replacing a high wattage resistor ( oxide metal
film resistor ) in circuit board, keep the resistor 10mm
away from circuit board.
4. Keep wires away from high voltage or high tempera-
ture components.
5. This receiver must operate under AC230 volts, 50Hz.
NEVER connect to DC supply or any other power or
frequency.
SAFETY PRECAUTION
Many electrical and mechanical parts in this have
special safety-related characteristics. These charac-
teristics are often passed unnoticed by a visual
inspection and the X-RAY RADIATION protection
afforded by them cannot necessarily be obtained by
using replacement components rated for higher volt-
age, wattage, etc. Replacement parts which have
these special safety characteristics are identified in
this manual and its supplements, electrical compo-
nents having such features are identified designated
symbol on the parts list.
Before replacing any of these components, read the
parts list in this manual carefully. The use of substitute
replacement parts which do not have the same safety
characterisitics as specifide in the parts list may create
X-RAY Radiation.
PRODUCT SAFETY NOTICE
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3
PIN Signal Designation Matching Value
1Audio Out (linked with 3) 0.5Vrms, Imp < 1 k (RF 60% MOD)
2Audio In (linked with 6) 0.5Vrms, Imp < 10 k
3Audio Out (linked with 1) 0.5Vrms, Imp < 1 k (RF 60% MOD)
4Audio Earth
5Blue Earth
6Audio in (linked with 2) 0.5Vrms, Imp < 10 k (RF 60% MOD)
7Blue in 0.7Vpp 2dB, Imp 75
8Slow (Function) Switching TV : 0-2V, PERI : 9.5 - 12V, Imp > 10 k
9Green Earth
10 NC
11 Green In 0.7Vpp 2dB, Imp 75
12 NC
13 Red Earth
14 Rapid(Blanking) Switching Earth
15 Red In, C In 0.7Vpp 2dB, Imp 75
16 Rapid(Blanking) switching Logic 0 : 0 - 0.4V, Logic 1 : 1 - 3V, Imp 75
17 Video Earth
18 Rapid Blanking Earth
19 Video Out 1Vpp 2dB, Imp 75
20 Video In, Y In 1Vpp 2dB, Imp 75
21 Common Earth
SPECIFICATIONS
+
-
+
-
+
-
+
-
+
-
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4
CIRCUIT BLOCK DIAGRAM
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