Daewoo CM21S7 Series Manual de usuario

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.

Service Manual

COLOR Television

CHASSIS :

Model:

Specification

S/M No. : TCP204SFEF0

TV Standard PAL-SECAM B/G, D/K (NTSC : AV Only)

Sound system Mono

Power consumption 74W

Speaker 5W 8 Ohm x 2

Teletext system 1 Page teletext

Aerial Input 75 Ohm unbalanced

Channel coverage off-air, S-cable and hyperband channels

Tuning system Ferquency synthesiser tuning system

Visual screen size 51cm

Channel indication On screen display

Program selection 100 Programmes

Auxiliary Terminal RCA jack : TV output and AV input

Remote control R-204S(AAA)

Safety standard CB

Alril 2011

CP-204S

CM21S7***

CM-21S7***

CM21S8***

CM-21S8***

1.SAFETY INSTRUCTION 2

2.BLOCK DIAGRAM 3

3.SERVICE ALIGNMENT INSTRUCTIONS 4

4.SCHEMATIC DIAGRAM 6

5.PRINTED CIRCUIT BOARD(PCB) 7

6.EXPLODED VIEW 9

7.SERVICE PARTS LIST 11

TABLE OF CONTENTS

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce 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 22-23 kV (14")or

24-26 kV (20"-21")at max beam current. The high voltage must not, under any circumstances, exceed 27.5 kV (14",

20"), 29KV (21"). Each time a receiver requires servicing, the high voltage should be checked. It is important to use an

accurate and reliable high voltage meter.).

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 cover 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) Discharge 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 body 10 mm away

from the circuit board.

4. Keep wires away from high voltage or high temperature components.

5. This receiver must operate under AC 230 volts, 5O Hz. NEVER connect to a DC supply of any other voltage or

frequency.

■PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this equipment 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 spe- cial safety characteristics are identified in this manual and its supplements, electrical components

having such features are identified by designated symbol on the parts list. Before replacing any of these components,

read the parts list in this manual carefully. The use of substitutes replacement parts which do not have the same safety

characteristics as specified in the parts list may create X-RAY Radiation.

1. SAFETY INSTRUCTION

WARNING : Only competent service personnel may carry out work involving the testing or repair of this equipment

2. BLOCK DIAGRAM

* Service Remocon Type : R-74S02 or R-30SVC6

3.1 Microcontroller Configuration: Service mode

3.1.1 Tuning System Option

Tuning option can be selected among the 4 options: TF->TK->TU->TA.

Selection is made possible using factory R/C key H.BOW Down(-) button.

Select to TK for PAL/SECAM B/G, D/K reception.

3.1.2 Tuner Option

Tuner option can be selected among the 4 options: LG -> SDI -> PHI -> GDC -> LON

Selection is made possible using factory R/C key OPT button.

Select and match with real Tuner type and maker.

3.2 TV Set Alignments

3.2.1 G2(Screen) alignment

- Press the "H/R" key of service remocon to the heat run mode off.

- Receive the RETMA PATTERN.

- Press the screen key on the service remocon.

- Adjust the screen volume of FBT, the SCREEN value equal to 32.

- Press the "SCREEN" key of service remocon again.

3.2.2 White Balance

- Select a dark picture and adjust R. BIAS and G.BIAS to the desired color temperature.

- Select a bright picture and adjust R.DRV, G.DRV, B.DRV to the desired color temperature.

3.2.3 Focus

- Adjust the Focus volume on FBT to have the best resolution on screen.

3.2.4 Vertical Geometry

- Adjust the vertical amplitude (V-SIZE), center (V-CEN) and slope (V-SLOPE) to compensate for the vertical

distortion.

3. SERVICE ALIGNMENT INSTRUCTIONS

TF TK TU

(Not supported by SW)

(Not supported by HW)

Supported TV

Systems

EURO

(PAL B/G)

EURO(B/G)

E/EURO(D/K) GB(PAL I) EURO(B/G)

FRANCE(L/L’)

LG SDI PHI GDC LON

LG INNOTEK SAMSUNG NXP GDC LONGSIGN

TAEM-G008D TECC2949PG35W UV1316/AI-4 EWT-5F6T43-E16W DWE-7053B

3.2.5 Horizontal Picture Centering

- Adjust H-CENTER to have the picture in the center of the screen.

3.2.6 WBF, WBR (Wide Blanking Front and Rear) adjustment

- Receive the RETMA PATTERN.

- Use the "COR-T UP/DN" keys for the "WBF" adjust and use the "COR-B UP/DN" keys for the "WBR"

adjustment.

3.2.7 AGC

- Adjust the antenna signal level to 64±2dBuV.

- Press "AGC" key of service remocon, then the RF AGC level stop when the level on pin 30 of I501 goes

below 2.5Vdc.

ALIGNMENT INSTRUCTIONS

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-8-

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