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S/G No. : CP002P-010G1
Service Guide
Colour Television
CHASSIS : CP-002
Model :
DTC-14 V1/V3/V4/V5/U1 TM
DTC-20 V1/V3/V4/V5/U1 TM
DTC-21 V1/V3/V4/U1/U3 TM
14/20/21 V1 14/20/21 V3 14/20/21 V4
14/20 V5 14/20/21 U1 21 U3
If you need further information ( IC, Circuit descriptions or
troubleshooting . . .) about this model,
Please visit our web site.( http://svc.dwe.co.kr)
Specifications
TV Standard PAL/SECAM-B/G, D/K, I, H, NTSC-3.58/4.43, NTSC-5.5
Mains Voltage 100 ~ 250V AC, 50/60Hz
Power Voltage 14" : 73W 20" : 78W
16" : 75W 21" : 86W
Sound output - . 2 Speaker (at any MOD. 10% THD )
: 5W + 5W (TWITTER 2.5W + 2.5W)
Speaker - . 2 Speaker : 7.5W 4 ohm
Memory channel 100 channels
Reception VHF - L : CH2 - CH4
channel Unit VHF - H : CH5 - CH12
Cable Band : CHS1' - CHS3', CHS1 - CHS20
Hyper Band : CHS21 - CHS40
UHF : CH21 - CH69
Remote control VG : R-28B04, TM : R-28B03
Function VG TM
-. CHILD Lock (CH Lock) -. CHILD Lock (Security code Lock)
-. 16 : 9 MODE -. OSD MESH
-. ZOOM MODE -. 16 : 9 MODE
-. Blue Back (ON/OFF) -. ZOOM MODE
-. Local Key Menu Control -. Blue Back (ON/OFF)
-. Arrow puzzle Game -. Local Key Control Menu Control
-. Monitor out -. Monitor out
-. Simple SCART -. Simple SCART
-. Twitter Speaker -. Twitter Speaker
-. TELETEXT : 8 PAGE TELETEXT
TOP/FLOF MODE
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr JAN. 2000
Important Service Notes
1. X-ray Radiation Rrecaution Connect at 1500 ohm 10 watt resistor, paralleled by a 0.15 mfd. AC type
1) Excessive high voltage can produce potentially hazardous X-RAY RADIA- capacitor, between a known good earth ground (water pipe, conduit etc.)
TION. To avoid such hazards, the high voltage must not be above the spec- and the exposed metallic parts, one at a time. Measure the AC voltage
ified limit. The nominal value of the high voltage of this receiver is across the combination of 1500 ohm resistor and 0.15 mfd capacitor. Volt-
25.5kv(20"/21") & 23.5kv(14")at zero beam current (minimum brightness) age measured must not exceed 0.3 volts RMS. This corresponds to 0.2 mill-
under a 120V/220V AC power source. The high voltage must not, under any liamp. AC. Any value exceeding the limit constitutes a potential shock
circumstances, exceed 28kv(20"/21") & 26kv(14"). Each time a receiver hazard and must be corrected immediately.
requires servicing, the high voltage should be checked following the HIGH
VOLTAGE CHECK procedure on page 10 of this manual. It is recom-
mended as a parts of the service record. It is important to use an accurate AC VOLT METER
and reliable high voltage meter.
2) This receiver is equipped with X-RADIATION PROTECTION circuit which
prevents the receiver from producing an excessively high voltage even if the
B+voltage increases abnormally. Each time the receiver is serviced, X-
RADIATION PROTECTION circuit must be checked to determine that the 0.15uF
circuit is properly functioning, following the X-RADIATION PROTECTION
1500 OHM
CIRCUIT CHECK procedure on page 6 of this manual. Place this probe
on each exposed
Good earth ground
3) The only source of X-RAY RADIATION in this TV receiver is the picture tube. such as d water
metallic part.
pipe, conduit, etc.
For continued X-RAY RADIATION protection, the replacement tube must be 10WATT
exactly the same type tube as specified in the parts list.
4) Some parts in this receiver have special safety-related characteristics for X-
RAY RADIATION protection. For continued safety, parts replacement 3. Product Safety Notice
should be undertaken only after referring to the PRODUCT SAFETY Many electrical and mechanical parts in this chassis have special safety-related
NOTICE below. characteristics. These characteristics are often passed unnoticed by a visual
inspection and the protection afforded by them cannot necessarily be obtained
2. Safety Precaution by using replacement components rated for higher voltage, wattage, etc.
WARNING: Service should not be attempted by anyone unfamiliar with the Replacement parts which have these special safety characteristics are identi-
necessary precaution on this receiver. The following are the necessary precau- fied in this manual and its supplements; electrical components having such fea-
tion to be observed before servicing. tures are identified by shading on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual
1) Since the chassis of this receiver has hazardous potential to ground when- carefully. The use of substitute replacement parts which do not have the same
ever the receiver is plugged in (floating chassis), an isolation transformer safety characteristics as specified in the parts list may create X-ray radiation or
must be used during servicing to avoid shock hazard. other hazards.
2) Always discharge the picture tube anode to the CRT conductive coating the
picture tube. The picture tube is highly evacuated and if broken, glass frag- 4. Service Notes
ments will be violently expelled. Use shatterproof goggles and keep picture 1) When replacing parts or circuit boards, clamp or bend the lead wires to termi-
tube away from the body while handling. nals before soldering.
3) When placing chassis in the cabinet, always be certain that all the protective 2) When replacing a high wattage resistor (metal oxide film resistor) in the cir-
devices are put back in place, such as; nonmetallic control knobs, insulat- cuit board, keep the resistor min 1/2 inch away form circuit board.
ing covers, shields, isolation resistor-capacitor network, etc. 3) Keep wires away from high voltage or high temperature components.
4) Before returning the set to the customer, always perform an AC leakage cur-
rent check on the exposed metallic parts of the cabinet, such as antennas,
terminals, screw-heads, metal overlays, control shafts etc. to be sure the set
DAEWOO ELECTRONICS CO., LTD.
is safe to operate without danger of electrical shock. Plug the AC line cord C.P.OBOX8003 SEOUL, KOREA
directly into a 120V AC outlet (do not use a line isolation transformer during Tel : 82-2-360-7798
Fax : 82-2-360-7877
this check). Use an AC voltmeter having 5000 ohms per volt or more sensi- E-mail : [email protected]
tivi-ty in the following manner. Printed in Apr. 2000
Alignment Instructions
1. AFT
1) Set a signal Generator with
- RF FREQUENCY = 38.9MHz, 34.2MHz (L' )
- RF OUTPUT LEVEL = 80 _
+ 5dBuV
- System = PAL / SECAM - B/G, D/K, I, H
NTSC - 3.58/4.43
2) Connect the Signal Generator RF Output to P101 (Tuner IF Output).
There must be no signal input to the tuner.
3) Press the "
AFT"KEY in Service Mode and wait until the "
Please wait"disappear on the TV screen.
2. AGC
1) Set a pattern Generator with
- RF LEVEL = 60dBuV
- 100% FULL COLOR BAR
2) Connect the Pattern Genetator RF Output to Tuner RF Input.
3) Press the "AGC"KEY in Service Mode and wait until the "
Please wait"disappear on the TV screen.
3. SCREEN
1) Receive the Retma pattern and heat run over 15minutes.
2) On the normal mode1 adjust the screen volume that the horizontal line appears on the screen after pushing the
"
SCREEN' KEY on the SVC Mode.
3) Adjust the screen volume that the horizontal lines reach the cut-off point.
4. WHITE BALANCE
1) Set the TV to NOR 1 mode.
2) Adjust the R,G,B UP/DOWN KEY of the color which appears abnormally on the screen to obtain WHITE BALANCE.
5. FOCUS
1) Apply a RETMA PATTERN signal.
2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.
6. GEOMETRY
6.1 VERTICAL CENTER
1) Set the TV to NOR 1 mode.
2) Pressing the V-SIZE UP/DOWN KEY, the lower half of the screen is blanked.
3) Adjust the border line of blanked picture coincident with the mechanical center
marks of the CRT using the V-CENTER UP/DOWN KEY.
6.2 VERTICAL SIZE
* The VERTICAL CENTER adjustment has to be done in advance.
1) Apply a RETMA PATTERN signal.
2) Set the TV to NOR 1 mode.
3) Adjust the upper part of the picture with the V-SIZE UP/DOWN keys.
6.3 HORIZONTAL CENTER
1) Apply a RETMA PATTERN signal.
2) Adjust picture centering with H-CENTER LEFT/RIGHT keys.
7. DATA PRESET(D.P) ADJUSTMENTS
1) Receive a 91 channel.
2) Adjust the SHARPNESS to 0.
3) Enter the service mode using the user remote control by pressing buttons in sequence as follows
R ----> G ---->B ----> MENU
4) Then, D.P OSD in service mode will appear on screen.
5) Press the channel up or down button to enter you wish to adjust.
6) You can control the data by pressing the volume up or down button.
8. FACTORY OUTGOING MODE
1) Press the EX-FACTORY in service mode, then set becomes factory outgoing status.
2) You can see the OSD "
outgoing OK!"
.
1
TV mode 1 2 3
1 POWER TELETEXT mode
2 NUMBER 0-9 1 POWER
4 5 6
3 NORMAL 2
2 NUMBER 0-9
4 AV 3 INDEX
7 8 9
5 PR(CURSOR) UP 4 MIX
6 VOLUME UP 5 PAGE UP
0 NORMAL/OK
(CURSOR RIGHT) 4 3
6 SUBPAGE
7 MENU 7 MENU
8 PR(CURSOR ) DOWN PR
8 PAGE DOWN
7 MENU
9 VOLUME DOWN 5 9 HOLD
(CURSOR LEFT) 10 MUTE
6
10 MUTE 9 11 REVEAL
11 RECALL 12 SIZE
12 SLEEP 8 13 CANCEAL
13 Not Used 14 Green Key
PR
10
14 MOVE (Edit mode only) SLEEP RECALL ?
15 Red Key
15 SKIP(Edit mode only) 12 11
16 TV/TEXT
16 TV/TEXT SKI 17 Cyan Key
MOVE X
P
17 DELETE (Edit mode only) 15 13 18 Yellow Key
18 MODE (Picture System Change) DELETE MODE
16
18 14
17
R-40A0 1
* How to enter "
Service Mode"with user remocon.
1. Select CH number 91.
2. Adjust sharpness to minium.
3. Exit from Menu mode
4. Quickly press the key sequence : Red --> Green --> Menu
5. You can see the "Service Mode OSD"
* To exit "
Service Mode" then press "
, Power off"
Service MODE OSD
R BIAS ???
G BIAS ???
B BIAS ???
R DRIVE ??
G DRIVE ??
B DRIVE ??
V CENTER ??
V SIZE ??
H CENTER ??
VCO ??
FINE ??
AGC ??
POW LAST OFF
SUB BRI ??
PR 91
OUTPUT MONI
BRIGHT 40
CONTRAST 54
COLOUR 35
Service Parts List