Daewoo CP-002 Service Manual

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 V5

If you need further information ( IC, Circuit descriptions or
troubleshooting . . .) about this model,
Please visit our web site.( http://svc.dwe.co.kr)

14/20/21 V3

14/20/21 U1

14/20/21 V4

21 U3

Specifications

TV Standard
Mains Voltage
Power Voltage

Sound output

Speaker
Memory channel
Reception

channel Unit

Remote control
Function

PAL/SECAM-B/G, D/K, I, H, NTSC-3.58/4.43, NTSC-5.5
100 ~ 250V AC, 50/60Hz
14" : 73W 20" : 78W

16" : 75W 21" : 86W

- . 2 Speaker (at any MOD. 10% THD )
: 5W + 5W (TWITTER 2.5W + 2.5W)

- . 2 Speaker : 7.5W 4 ohm

100 channels

VHF - L : CH2 - CH4
VHF - H : CH5 - CH12
Cable Band : CHS1' - CHS3', CHS1 - CHS20
Hyper Band : CHS21 - CHS40
UHF : CH21 - CH69

VG : R-28B04, TM : R-28B03

VG

-. CHILD Lock (CH Lock)

-. 16 : 9 MODE

-. ZOOM MODE

-. Blue Back (ON/OFF)

-. Local Key Menu Control

-. Arrow puzzle Game

-. Monitor out

-. Simple SCART

-. Twitter Speaker

-. CHILD Lock (Security code Lock)

-. OSD MESH

-. 16 : 9 MODE

-. ZOOM MODE

-. Blue Back (ON/OFF)

-. Local Key Control Menu Control

-. Monitor out

-. Simple SCART

-. Twitter Speaker

-. TELETEXT : 8 PAGE TELETEXT

TM

TOP/FLOF MODE

D AEW OO ELECTR ONICS CO., LTD

http : //svc.dwe .co.kr

JAN. 2000

Important Service Notes

1. X-ray Radiation Rrecaution

1) Excessive high voltage can produce potentially hazardous X-RAY RADIA­TION. To avoid such hazards, the high voltage must not be above the spec­ified limit. The nominal value of the high voltage of this receiver is

25.5kv(20”/21”) & 23.5kv(14”)at zero beam current (minimum brightness)
under a 120V/220V AC power source. The high voltage must not, under any
circumstances, exceed 28kv(20”/21”) & 26kv(14”). Each time a receiver
requires servicing, the high voltage should be checked following the HIGH
VOLTAGE CHECK procedure on page 10 of this manual. It is recom­mended as a parts of the service record. It is important to use an accurate
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, X­RADIATION PROTECTION circuit must be checked to determine that the
circuit is properly functioning, following the X-RADIATION PROTECTION
CIRCUIT CHECK procedure on page 6 of this manual.

3) 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.

4) Some parts in this receiver have special safety-related characteristics for X­RAY RADIATION protection. For continued safety, parts replacement
should be undertaken only after referring to the PRODUCT SAFETY
NOTICE below.

2. Safety Precaution

WARNING: Service should not be attempted by anyone unfamiliar with the
necessary precaution on this receiver. The following are the necessary precau­tion to be observed before servicing.

1) Since the chassis of this receiver has hazardous potential to ground when­ever the receiver is plugged in (floating chassis), an isolation transformer
must be used during servicing to avoid shock hazard.

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 frag­ments will be violently expelled. Use shatterproof goggles and keep picture
tube away from the body while handling.

3) When placing chassis in the cabinet, always be certain that all the protective
devices are put back in place, such as; nonmetallic control knobs, insulat­ing covers, shields, isolation resistor-capacitor network, etc.

4) Before returning the set to the customer, always perform an AC leakage cur­rent 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
is safe to operate without danger of electrical shock. Plug the AC line cord
directly into a 120V AC outlet (do not use a line isolation transformer during
this check). Use an AC voltmeter having 5000 ohms per volt or more sensi­tivi-ty in the following manner.

Connect at 1500 ohm 10 watt resistor, paralleled by a 0.15 mfd. AC type
capacitor, between a known good earth ground (water pipe, conduit etc.)
and the exposed metallic parts, one at a time. Measure the AC voltage
across the combination of 1500 ohm resistor and 0.15 mfd capacitor. Volt­age measured must not exceed 0.3 volts RMS. This corresponds to 0.2 mill­liamp. AC. Any value exceeding the limit constitutes a potential shock
hazard and must be corrected immediately.

AC VOLT METER

0.15uF

Good earth ground
such as d water
pipe, conduit, etc.

1500 OHM

10WATT

Place this probe
on each exposed
metallic part.

3. Product Safety Notice

Many electrical and mechanical parts in this chassis have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual
inspection and the 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 components having such fea­tures 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
carefully. The use of substitute replacement parts which do not have the same
safety characteristics as specified in the parts list may create X-ray radiation or
other hazards.

4. Service Notes

1) When replacing parts or circuit boards, clamp or bend the lead wires to termi­nals before soldering.

2) When replacing a high wattage resistor (metal oxide film resistor) in the cir­cuit board, keep the resistor min 1/2 inch away form circuit board.

3) Keep wires away from high voltage or high temperature components.

DAEWOO ELECTRONICS CO., LTD.

C.P.OBOX8003 SEOUL, KOREA
Tel : [phone]
Fax : [phone]
E-mail : [e-mail]
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!”.