Daewoo CP-820 Schematic
S/M No: TCP820BEF0
http : //svc.dwe .co.kr
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.
MAY 2003
DTK-28A7Z
**
/ DTK-28B1Z
**
DTK-28W5Z
**
/ DTK-28B2Z
**
DTK-28A6Z
**
/ DTK-28G6Z
**
DTK-2880Z
**
/ DTK-28G7Z
**
DTK-28G8Z
**
Service Manual
Colour Television NORMAL / WIDE STEREO
CHASSIS : CP-820
CRT
SYSTEM
Main Voltage
Power Consumption
Sound Output
Speaker
Antenna Impdeance
Tuning System
Tuner
Number of Program
Aux. Terminal
MODEL :
Specifications
PAL/SECAM-B/G,D/K,PAL-I/I',SECAM-L/L' NTSC-3.58/4.43 (Play back)
230V AC, 50Hz
Stand-by mode : 2.0Watts
Normal operating mode : 120 Watts
10 + 10 Watts, 10% THD at RF 60% mod. (1kHz)
12W 8ohm x 2 EA
75 ohm unbalanced input (Din Standard)
Frequency Synthesize(FS) Tuning System
UV1316/A(Philips), DT5-BF18D(Partsnics), EL2782-105-B(Siel), TECC2949PG35W(S/S)
100 programs
21 pin EURO-SCART jack (AV input, TV output, RGB input)
21 pin EURO-SCART jack (AV input, S-VHS input)
RCA type AV input jack
Headphone jack
Normal Wide
A66EAK071X44 A66EAK001X44
Remote Controller
Teletext
OSD Language
R-22D06 with 2 "AAA" type batteries
TOP(5 Page memory) & FLOF(7 Page memory)
- West option : English, German/Dutch/Flemish, French, Italian, Spanish/Portuguese,
Swedish/Finnish/Danish, Hungarian, Rumanian, Turkish
- West : English, German, French, Italian, Spanish, Nethelands, Swedish
TABLE OF CONTENTS
SAFETY INSTRUCTION .................................................................................................................. 2
SPECIFICATIONS ............................................................................................................................ 3
CIRCUIT BLOCK DIAGRAM ........................................................................................................... 4
ALIGNMENT INSTRUCTION ........................................................................................................... 5
SCHEMATIC DIAGRAM .................................................................................................................. 12
EXPLODED VIEW ............................................................................................................................ 14
PRINTED CIRCUIT BOARD ............................................................................................................ 16
SERVICE PARTS LIST .................................................................................................................... 19
APPENDIX (" Appendix is provided only by internet [http://svc.dwe.co.kr] ")
IC DESCRIPTION ............................................................................................................................. 1
IC DC VOLTAGE CHARTS .............................................................................................................. 18
1
SAFETY INSTRUCTION
WARNING
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can prodece potentially hazardous X-RAY RADIATION. To avoid such hazards,
the high voltage must not exceed the specified limit.
The nominal value of the high voltage of this receiver is
29-31kv at max beam current. The high voltage must
not, under any circumstances, exceed 35kv. (33kv :
SAMSUNG CRT)
Each time a receiver require servicing, the high volt-
age should be checked. It is imprortant to use an accurate and reliable high voltage meter.
: Only competent service personnel may carry out work involving the testing or repair of this equipment
2. The only source of X-RAY Radiation in this TV receiver
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.
SAFETY PRECAUTION
1. Potentials of high voltage are present when this
receiver is operating. Operation of the receiver outside
the cabinet or with the back board removed involves a
shock hazard from the receiver.
1) Servicing should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary 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.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this have
special safety-related characteristics. These characteristics 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 voltage, wattage, etc. Replacement parts which have
these special safety characteristics are identified in
this manual and its supplements, electrical compo-
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 temperature components.
5. This receiver must operate under AC230 volts, 50Hz.
NEVER connect to DC supply or any other power or
frequency.
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.
2
SPECIFICATIONS
PIN Signal Designation Matching Value
1 Audio Out (linked with 3)
2 Audio In (linked with 6)
3 Audio Out (linked with 1)
4 Audio Earth
5 Blue Earth
6 Audio in (linked with 2)
7 Blue in
8 Slow (Function) Switching
9 Green Earth
10 NC
11 Green In
12 NC
13 Red Earth
14 Rapid(Blanking) Switching Earth
15 Red In, C In
16 Rapid(Blanking) switching
0.5Vrms, Imp < 1 k (RF 60% MOD)
0.5Vrms, Imp < 10 k
0.5Vrms, Imp < 1 k (RF 60% MOD)
0.5Vrms, Imp < 10 k (RF 60% MOD)
+
0.7Vpp 2dB, Imp 75
-
TV : 0-2V, PERI : 9.5 - 12V, Imp > 10 k
+
0.7Vpp 2dB, Imp 75
-
+
0.7Vpp 2dB, Imp 75
-
Logic 0 : 0 - 0.4V, Logic 1 : 1 - 3V, Imp 75
17 Video Earth
18 Rapid Blanking Earth
19 Video Out
20 Video In, Y In
21 Common Earth
+
1Vpp 2dB, Imp 75
-
+
1Vpp 2dB, Imp 75
-
3
CIRCUIT BLOCK DIAGRAM
4
ALIGNMENT INSTRUCTIONS
User Remocon
1. R-22D06
TV................................TXTTV...................................TXT
VOLUME...............VOLUME
DOWN ..................DOWN
(CURSOR LEFT)
MENU.......................MENU
POWER.................POWER
PR ......................... PAGE
NUMBER NUMBER
0-9 0-9
SLEEP...................Not used
Not used................CANCEL
Not used................... HOLD
RECALL...............SUBPAGE
STILL......................REVEAL
Not used ..........................R
Not used ..........................G
PR UP..........................PAGE UP
(CURSOR UP)
VOLUME UP...........VOLUME UP
(CURSOR RIGHT)
PR DOWN..............PAGE DOWN
(CURSOR DOWN)
NORMAL .................... Not used
A V .............................. Not used
TXT ............................. Not used
SOUND ....................... Not used
MODE
MUTE .......................... MUTE
Not used ...................... INDEX
Not used ....................... Size
Zoom ..................Double Window
EFFECT ....................... Not used
Not used ...................... C
Not used ....................... Y
5
R-22D06
ALIGNMENT INSTRUCTIONS
Tuner is
Flat Option
Svm SVG
Svm SVD
Svm SVDEL
Svm SVCOR
Bcl Thres
Bcl Tc
Bcl Gain
Nor1 Bright
Nor1 Cont
Nor1 Color
Nor1 Sharp
Nor1 Tint
Nor2 Bright
Nor2 Cont
Nor2 Color
Nor2 Sharp
Nor2 Tint
Dolby3411
Phi
NO
020
001
013
012
430
250
511
038
058
038
032
032
038
038
038
032
032
NO
Osd Contrast
Osd Bright
Text Gain
Tilt Option
Transparent
Vertical angle
Vertical bow
380
000
NO
NO
NO
000
000
V. Slope
V. Center
V. Size
S. Curve
H. Center
H. Width
EW. Para
EW. Cor Top
EW. Cor Low
EW.Sym
R. Bias
G. Bias
B. Bias
R. Drive
G. Drive
B. Drive
G2 Adjust
Sub bright
Double TEXT
Wide Option
-002
887
091
035
-325
088
-068
015
015
-013
330
330
330
370
370
370
000
000
514
NO
SVC v1
CP-820
* How to Enter the “ Service Mode ” with user remocon.
1) Set the TV Pr 91
2) Sharpness “ MIN “ control.
3) Push the Red, Green, Menu buttons in regular sequency within 5 seconds after setting TV power off.
4) You can see the Menu of “ service mode “ on the screen.
5) The PR UP/DOWN buttons on the remote controller are used to move the selection bar up or down the Menus.
6) The VOL UP/DOWN buttons on the remote controller are used to adjust levels.
7) If you want to exit from “ Service Mode “ then power the TV off.
- You can see the SVC Menu by OSD in TV set.
6
ALIGNMENT INSTRUCTIONS
Alignment Instructions for CP-820 Chassis
1 PAGE
CHASSIS
MODEL DTK-28A7ZZF DTK-28A7ZLF DTK-28W5ZZF DTK-28W5ZLF
CP-820
V. Slope
V. Center
V.Size
S.Curve
H.Center
H.Width
EW.Para
EW.Cor Top
EW.Cor Low
EW. Sym
R Bias
G Bias
B Bias
R Drive
G Drive
B Drive
G2 Adjust
Sub Bright
Double TEXT
Wide Option
2 PAGE
Tuner Is
Flat Option
Svm SVG
Svm SVD
Svm SVDEL
Svm SVCOR
Bcl Thres
Bcl Tc
Bcl Gain
Nor1 Bright
Nor1 Cont
Nor1 Color
Nor1 Sharp
Nor1 Tint
Nor2 Bright
Nor2 Cont
Nor2 Color
Nor2 Sharp
Nor2 Tint
Dolby 3411
-002 -002 -002 -002
887 887 035 035
091 091 111 111
035 035 010 010
-325 -325 -316 -316
088 088 044 044
-068 -068 -059 -059
015 015 004 004
015 015 004 004
-013 -013 -013 -013
330 330 330 330
330 330 330 330
330 330 330 330
370 370 370 370
370 370 370 370
370 370 370 370
000 000 000 000
000 000 000 000
514 514 514 514
NO NO YES YES
Phi Phi Phi Phi
N0 N0 N0 N0
무관 무관 무관 무관
무관 무관 무관 무관
무관 무관 무관 무관
무관 무관 무관 무관
430 430 470 470
250 250 250 250
511 511 511 511
038 038 038 038
058 058 058 058
038 038 038 038
032 032 032 032
032 032 032 032
038 038 038 038
038 038 038 038
038 038 038 038
032 032 032 032
032 032 032 032
N0 YES N0 YES
3 PAGE
Osd Contrast
Osd Bright
Text Gain
Tilt Option
Transparent
Vertical angle
Vertical bow
380 380 380 380
000 000 000 000
NO NO NO NO
NO NO NO NO
NO NO NO NO
000 000 000 000
000 000 000 000
7
ALIGNMENT INSTRUCTIONS
8
AFT
Standard B/G, D/K, I and L
1) Set a Signal Generator with
- RF FREQUENCY = 38.9 MHz,
- RF OUTPUT LEVEL = 80 5dBuV
- Pattern = Color Bar
- System = PAL-B/G
2) Connect the Signal Generator RF Output to TP2 (Tuner IF Output).
There must be no signal input to the tuner.
3) Set the L103 to TP1(I101, #22) with DC Voltage to 2.5V 0.1V
RF AGC
1) Set a TV Signal Generator(e.g. PM5418)with
- RF FREQUENCY : 503.25 MHz, CH 25
- RF OUTPUT LEVEL : 1 60 dBuV(TECC2949PG35W:Samsung/DT5-BF18D:Partsnic)
2 60 dBuV(UV1316/A:Philips/EL2782/105-B-Siel)
- Pattern = Color Bar(or Philips patten)
+
-
+
-
2) Connect the Signal Generator RF output to Tuner input terminal.
Connect a Oscilloscope probe(or Digital Multi-meter) to P101(Tuner AGC input).
3) Set the voltage level to 1 3.0V 0.1Vdc, 2 2.5V 0.1Vdc by adjusting the RB02
(Variable Resistor).
SCREEN (G2)
1) Set a Pattern Generator with - RF Frequency : 210.25MHz (10CH)
- Pattern : RETMA
2) Select the “G2” in Menu
3) And a Horizontal Line will appear on the screen.
4) Adjust the SCREEN VOLUME on FBT barely to see the Horizontal Line.
5) Press the PR UP/DOWN keys to finish the SCREEN adjustment.
FOCUS
1) Apply a RETMA PATTERN signal.
2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.
GEOMETRY
1. VERTICAL SLOPE ( Fixed : Adjust if need be )
1) Apply a RETMA PATTERN Signal.
2) Set the TV to Normal I mode.
3) Adjust the higher semicircle and the lower semicircle to be the same, with the V.Slope
by volume Up/Down keys.
2. VERTICAL CENTER
1) Apply a RETMA PATTERN Signal.
2) Set the TV to Normal I mode.
3) Adjust the center of the picture with the V.Center by volume Up/Down keys.
+
-
+
-
3. VERTICAL SIZE
* The VERTICAL CENTER adjustment has to be done in advance.
1) Apply a RETMA PATTERN Signal.
2) Set the TV to Normal I mode.
3) Adjust the VERTICAL SIZE of the picture with the select V.size by
volume UP/DOWN keys.
4. VERTICAL S-CORRECTION ( Fixed : Adjust if need be )
1) Apply a CROSSHATCH PATTERN Signal.
2) Adjust the S-CORRECTION to obtain the same distance between
horizontal lines with the S.Curve by volume UP/DOWN keys.
5. HORIZONTAL CENTER
1) Apply a RETMA PATTERN Signal.
2) Adjust picture centering with the select H.Center by volume UP/DOWN keys.
ALIGNMENT INSTRUCTIONS
EW
1. WIDTH
1) Apply a RETMA PATTERN Signal.
2) Adjust the horizontal width to make a perfect circle with the select H.Width
by volume UP/DOWN keys.
2. PARA
1) Apply a CROSSHATCH PATTERN Signal.
2) Adjust the vertical line to straight with the select E.W Para by volume
UP/DOWN keys.
3. CORNER ( Fixed : Adjust if need be )
1) Apply a CROSSHATCH PATTERN Signal.
2) Adjust the vertical line to straight with the select EW.Cor T by volume
UP/DOWN keys.
4. SYMMETRY ( Fixed : Adjust if need be )
1) Apply a CROSSHATCH PATTERN Signal.
2) Adjust the symmetrical balance to be suitable with the select EW Sym by
volume UP/DOWN keys.
9
ALIGNMENT INSTRUCTIONS
WHITE BALANCE
* The SCREEN alignment must proceed this procedure.
1. Apply a Black & White pattern signal.
4. Menu Reference LOW ( 288, 301 : 30Cd/ )
HIGH ( 288, 301 : 100Cd/ )
5. Adjust G, B Gain with select Menu G,B of BIAS, DRIVE of select Menu so that R, G, B Bars
are on the center position of the analog meter. If R Analog meter is not on center, control
the Brightness +/- of user Remocon so as R Analog meter to be on the center position.
SUB BRIGHT
1. Pattern : Retma
2. Adjust the SUB BRIGHT with the select Sub Bri by volume UP/DOWN keys.
so that only H-Center parts of picture can be seen.
DOUBLE TEXT CENTER
1. Pattern : Pattern RED
2. Select Menu
3. Select DT in SVC menu time to see the Double Text Picture.
( Left : RF Picture, Right : Text Picture )
4. Change the Double Text control keys volume UP/DOWN keys so that the left edge of text
picture concur with the right edge of RF picture.
m
2
m
2
2. Call up the Service menu.
3. Set the reference R.
WIDE MODE
1. Locate the cursor on ‘ Wide’ in SVC Menu.
2. ‘ Yes’ changes the display to 16:9 mode.
3. ‘ No’ change the display to 4:3 mode.
TUNER SELECTION
1. DWE : Partsnic Tuner
2. PHI : Philips Tuner
3. SIE : Siel Tuner
FLAT MODE
1. Locate the cursor on ‘ FLAT’ in SVC Menu.
2. ‘ Yes’ changes the display to FLAT CRT mode.
3. ‘ No’ change the display to Normal CRT mode.
10
ALIGNMENT INSTRUCTIONS
SVM (Scan Velocity Modulation)
1. SVM SVG : SVM Gain
2. SVM SVD : SVM Differentiator delay (0 = filter off)
3. SVM SVDEL : Delay of SVMOUT in steps of 12.5nS
2. SVM SVCOR : SVM coring value
BCL (Beam Current Limit)
1. BCL Thres : BCL threshold current
2. BCL TC : BCL time constant
3. BCL Gain : BCL loop Gain
11
SCHEMATIC DIAGRAM
12
SCHEMATIC DIAGRAM
13
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