Daewoo DTR-14D3VG Manuel utilisateur

Colour Television

CHASSIS : CP-490

MODEL : DTR-14D3VG

DTR-14D3TM

DTR-16D3VG

DTR-20D3VG

DTR-20D3TM

DTR-21D3TMW

DTR-21D3VGW

DTR-21D3TGW

DAEWOO ELECTRONICS CO., LTD.

S/M No:CP490P-010

✔

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).

CONTENTS

Specifications ................................................................................................ 1

Safety Instruction .......................................................................................... 2

Circuit block Diagram .................................................................................... 3

Alignment Instructions ................................................................................. 4

IC Description ................................................................................................ 8

Circuit Description ....................................................................................... 34

Trouble Shooting Charts ............................................................................. 49

Electrical Parts List ..................................................................................... 56

CP-490 each model Parts List .................................................................... 62

Mechanical Exploded View and Parts List ................................................ 64

PCB Layouts ................................................................................................ 67

• PRINTED CIRCUIT BOARDS

• SCHEMATIC DIAGRAM

Specifications

TV Standard PAL/SECAM-B/G, D/K, I, H, NTSC-3.58/4.43

Mains Voltage 100~250V AC, 50/60Hz

Power Consumption 14”, 16” = 85W

20”, 21” = 90W

Sound output . 2 Speaker (at 80% MOD. 10% THD) : 5W + 5W (TWITTER 2.5W + 2.5W) 14”, 16”

6W + 6W (TWITTER 2.5W + 2.5W) 20”

. 3 Speaker (at 80% MOD. 10% THD) : 8W + 8W + 8W(21”)

Speaker . 2 Speaker : 7.5W, 8 OHM(2EA)

. 3 Speaker : 12W, 8 OHM(3EA)

Antenna 75 ohm unbalanced

Impedance 300 ohm balanced with supplied balun

Tuning system Voltage Synthesize Tuning System

Memory channel 100 channels

Reception VHF - L : CH2 - CH4

channel Unit VHF - H : CH5 - CH12

Cable Band : CHS1’ - CHS3’, CHS1 - CHS20

UHF : CH21 - CH69

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

Screen size 14” : 34cm (A34JLL 90 02)

20” : 48cm (A48JLL 90 02)

21” : 51cm (A51JLL 90 02)

Weight 14” : 9.7Kg(set)

20” : 19.6Kg(set)

21” : 26.5Kg(set)

Indication On-Screen Display

- MENU

• Picture (Brightness, Color, Contrast, Sharpness, TINT)

• TIMER (TM/TMW/TGW:CLOCK, OFF TIME, WAKE-UP-TIME, ACTIVATE, WAKE-UP-

PROG/VG:CLOCK, ON TIME, OFF TIME)

• LANGUAGE

• PRESET

• EDIT (TM, TMW, TGW)

• SLEEP •BLUE BACK •GAME

• AV1, AV2 •NORMAL1, NORMAL2, FAVORITE

• SOUND MUTE

• VOLUME CONTROL

• WOOFER (21” ONLY)

• 16:9, ZOOM, NORMAL

VG : WITHOUT TXT. MODEL, TM : WITH TXT. MODEL

Safety Instruction

WARNING: Before servicing this chassis, read the “X-RAY RADIATION precaution”, “safety precaution”

and “product safety notice” below.

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 23-24kv(14”), 26-

27kv(20”, 21”) at max beam current. The high

voltage must not, under any circumstances,

exceed 27.5kv (14", 20”), 29.0kv(21”).

Each time a receiver requires servicing, the high

voltage should be checked. It is recommended

the reading of the high voltage recorded as a part

of the service records. 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 continuous

RADIATION protection, the replacement tube

must be exactly the same type tube as specified

in the parts list.

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) Always discharge the picture tube to avoid the

shock hazard before removing the anode cap.

3) 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 10mm away from circuit board.

4. Keep wires away from high voltage or high

temperature components.

5. This receiver must operate under AC260 volts,

50Hz/60Hz. (AC 100~250 volts, 50/60Hz)NEVER

connect to DC supply or any other power or

frequency.

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 X-RAY RADIATION

protection afforded by them cannot necessarily be

obtained by using replacement components rated

for higher voltage, wattage, etc.

X-RAY RADIATION PRECAUTION

PRODUCT SAFETY NOTICE

SAFETY PRECAUTION

Circuit Block Diagram

1. AFT

1.1 Standard B/G,D/K,I

1) Set a Signal Generator with

- RF FREQUENCY = 38.9 MHz,

- RF OUTPUT LEVEL = 80 5 dBuV

- System = PAL / SECAM - B/G, D/K, I

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 and wait until the TV screen display “AFT OK”.

2. AGC

1) Set a Pattern Generator with RF LEVEL 63° 2 dBuV .

2) Connect a OSCILLOSCOPE PROBE to P102 (TUNER AGC INPUT).

3) Adjust AGC UP/DOWN KEY the voltage drop 2.0V±0.5V dc point its maximum voltage.

Alternative Method

1) Set a Pattern Generator with

- RF LEVEL 80 5 dBuV

- PAL CROSSHATCH

( without SOUND CARRIER )

2) Connect a OSCILLOSCOPE

( Bandwidth 100MHz ) PROBE

to P101 (TUNER IF OUTPUT).

3) Use AGC UP/DOWN KEY to obtain

an envelop amplitude 200 + 20 mVp-p.

3. SCREEN

1) Receive the color bar pattern and heat run over 15

minutes.

2) On the normal mode1 adjust the screen volume that

the horizontal line appears on the screen after push-

ing the AFT-L key on the SVC remote control unit.

3) Adjust the screen volume that the horizontal lines

reach the cut-off point

4. WHITE BALANCE

1) Set the TV to NOR I mode.

2) Set the R,G,B LEVEL to CENTER with R,G,B UP/DOWN KEY .

3) 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.

Alignment Instructions

6. GEOMETRY

6.1 VERTICAL CENTER

1) Set the TV to NOR I 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 I mode.

3) Adjust the upper part of the picture

with the V-SIZE UP/DOWN keys.

6.3 VERTICAL SLOPE

The VERTICAL SIZE adjustment

has to be done in advance.

1) Apply a RETMA PATTERN signal.

2) Adjust the lower part of the picture

with the V-SLOPE UP/DOWN keys.

6.4 VERTICAL S-CORRECTION

1) Apply a CROSSHATCH PATTERN signal.

2) Adjust the S-COR UP/DOWN KEY to obtain

the same distance between horizontal lines.

6.5 HORIZONTAL CENTER

1) Apply a RETMA PATTERN signal.

2) Adjust picture centering with H-CENTER

LEFT/RIGHT keys.

If EEPROM(I702) has been changed ;

- Option data has to be changed and

- all alignment function has to be readjusted.

The initial state of adjustment are as follows;

- V-Center, V-Slope V-Size, H-Center, R, G, B, AFT = Center (30/64 - 33/64)

- S-Correction = 00/64

- AGC = 15~60/64

Service Remocon

IC Description

DW90244-AS/(Z8 DIGITAL TELEVISION CONTROLLER)

= Z9024106PSC (ZILOG TYPE NO.)

(1) General Description

The Z9023X Digital Television Controller (DTC) family is ZILOG’s latest and most powerful Z8-based DTC product offering,

These parts feature larger system RAM and Rom Options, together with a host of new features including a newcolor palette

systen, flexible inter-row spacing, higher character cell resolution, background mesh effect, dedicated I. R. capture registers,

on-chip Analog-to-Digital conversion, and a hardware Master mode I2C interface. The famililiar Z8 core in combination with

these advanced features makes the Z9023X family an ideal choice for low to midrange televisions in both PAL and MTSC

markets.

The Z9023X family consists of three basic device types; ICE Chip (Z90239), ROM Mask Parts (Z90233/Z90234), and OTP

Part (Z90231), The OTP (Z90231) supports field programmable 32KB system ROM. ICE Chip (Z90239) is used in Z90239

Emulator and ProtoPaK. As described above, Z90233 supports 16KB system ROM and Z90234 supports 24KB system

ROM for mask.

The Z9021X family takes full advantage of the Z8’s expanded register file space to offer greater flexibility in On Screen Dis-

play creation.

(2) Feature

Z8-Based CMOS Microcontroller for Consumer Television, Cable Box, and Satellite Receiver Applications

• 42 - Pin SDIP Package except Z90239 (124 PGA)

• Z8@MCU Core at 6 MHz

• Mask ROM sizes Available in 16 and 24KB

• Ten 6-bit Pulse Width Modulators

• One 14-bit Pulse Width Modulator

• On-Chip Infrared (IR) Capture Registers

• Four Channel 4-bit Analog-to-Digital Converter

• Twenty Seven General Purpose I/O Pins

• I2C Master Serial Communication Port

On Screen Display (OSD) Section

• Supports Displays up to 10 rows by 24 Columns with 256 Characters

• Character Cell Resolution of 14 Pixels by 18 Scan lines

• Variable Inter-row Spacing from 0-15 Horizontal Scan Lines

• Foreground and Background Colors Fully Programmable by Character

(3) Block Diagram

Ce manuel convient aux modèles suivants

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