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
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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