SAMSUNG DW21G5VDX Service Manual

DVD Television

Chassis : C16A Model: DW21G5VDX/COM

DW21G5VDX/SED

DVD Television Cassette Recorder CONTENTS

Precautions Specifications Disassembly and Reassembly

Alignment and Adjustment (Electrical)

Troubleshooting Exploded View and Parts List Electric Parts List Block Diagram Schematic Diagrams

Samsung Electronics 2-1

2-1. Specifications

TELEVISION PART

Colour systems PAL(option) / SECAM(option) (UK;PAL) TV standards L/L’(option), B/G(option), D/K(option) (UK;I) Number of channels 100 programmes Reception range/cable TV Hyperband/interband tuner Aerial input 75 Ohms, coaxial cable

DISC

DVD (DIGITAL VERSATILE DISC) Reading Speed : 3,49 m/sec.

Approx. Play Time (Single sided, Single Layer Disc) : 135 min.

CD : 12 Cm Reading Speed : 1,2 to 1,4 m/sec.

Maximum Play Time : 74 min.

CD : 8 Cm Reading Speed : 1,2 to 1,4 m/sec.

Maximum Play Time : 20 min.

CD : 12 Cm Reading Speed : 1,2 to 1,4 m/sec.

Maximum Play Time : 74 min. (Video + Audio)

GENERAL

Power supply 220-240V~, 50Hz (110-260V~, 50/60Hz; option) Consumption 85W Audio output power 7Watts x 2 Number of loudspeakers 2 Tube size 21” (51cm) Tube type BLACK MATRIX Sockets 2 SCART(SCART1 : FULL RGB SCART) ON THE REAR.

(SCART2 : MONITOR OUT) ON THE REAR. 1 RCA input (audio and video2) on the front Earphones output (3.5 mm mini-jack) 1 aerial/cable TV coaxial input

Dimensions (W x D x H)/Weight 606 X 513 X 505mm / 39.5Kg Operating temperature 5°C - 35°C Relative humidity 10% - 75%

The descriptions and characteristics given in this booklet are given for information purposes only and are subject to modification without notice.

4-2 Factory (“Service”) Mode

Alignment and Adjustments (Electrical)

4. Alignment and Adjustments (Electrical)

4-1 Preadjustment

4-1-1 Factory Mode

1. Do not attempt these adjustments in the Video Mode.

2. The Factory Mode adjustments are necessary when either the EEPROM (IC902) or the CRT is replaced.

3. Do not tamper with the “Adjustment” screen of the Factory Mode menu. This screen is intended only for factory use.

4-1-2 When EEPROM (IC902) Is Replaced

1. When IC902 is replaced all adjustment data revert to initial values. It is necessary to reprogram this data.

2. After IC902 is replaced, warm up the TV for 10 seconds.

4-1-3 When CRT Is Replaced

Make the following adjustments after setting up

purity and convergence:

White Balance Sub-Brightness Vertical Center Vertical Size Horizontal Size

4-2-1 Procedure for the “Adjustment” Mode

1. This mode uses the standard remote control. The Service Mode is activated by: (1) pressing the “FACTORY” service key on the local-keyboard, or (2) by entering the following remotecontrol sequence (within 2 seconds):

STAND-BY →DISPLAY →MENU→ MUTE→ POWER ON

2. The “SERVICE (FACTORY)” message will be displayed. The Service Mode has three components: Adjustment, Option Bytes and Reset.

3. Access the Adjustment Mode by pressing the “VOLUME” keys ( Up or Down). The adjustment parameters are listed in the accompanying table, and selected by pressing the CHANNEL keys (▲,▼).

4. Selection sequences for the PAL/SECAM B/G, L systems:

down or up key: TXP>SBT>SCT>SCR>STT>BCR>BLG>RG> GG>BG>PWL>SC>SL>VA>PUS>PHS>GRE> BB>CDL>BKS>PEW>PEP>PEUC>PELC> PDL>VSC>HP>HB>TC>WS

5. The VOLUME keys increase or decrease the adjustment values, (stored in the non-volatile memory) when Adjustment Mode is cancelled.

4-2-2 Adjust

NOTE : PVS, VA, PHS, NVS, NHS parameters must be aligned using

both the 50 Hz and 60 Hz vertical-field rates.

4-2-3 AGING Mode (Reference Only)

This pattern is used for pre-heating the CRT during manufacturing--it is accessed in the factory by twice pressing the "FACTORY" key .

Even if the TV power is cut off, the Aging Mode is not cancelled. The "AGING" marking is displayed on the screen. The AGING mode is cancelled by repressing the "FACTORY" key.

Alignment and Adjustments (Electrical)

OSD

TXP SBT SCT

SCR

STT BLR BLG

RG GG BG

PWL

SL VA

PVS

Initial

4 6

6 9 8

8 32 32 32 15 11 27 12 26

Adjust

Fix

Fix Fix

Fix

Fix Fix Fix

Range

0-7 0-23 0-23

0-13 0-13 0-15 0-15 0-63 0-63 0-63 0-15 0-63 0-63 0-63 0-63

Function Osd Position Sub Brigh Sub Contrast

Sub Color Sub Tint Low Light R Low Light G High Light R High Light G High Light B Peak white level S-Correction Vertical Slope Vertical Amplitu Pal vertical shift

Adjust

Fix Fix Fix Fix

Fix Fix Fix Fix Fix Fix Fix

Fix

Initial

1 0

2 0 0

7 32 32 32 32

OSD PHS GRE

BB CDL BKS

REW

PEP

PEUC

PELC

PDL

VSC

Range

0-63

0-1 0-1

0-15

0-1 0-15 0-15 0-63 0-63 0-15 0-63 0-63 0-63 0-63

0-63

Function Pal Horizon Shift Greenish level Blue Screen

Cathode Drive Level Black Stretcher EW EW Parabola Under Corner Lower Corner

H-Paralleogram Horizontal Bow EW Trapezium White Stretch

4-2-4 OPTION

Alignment and Adjustments (Electrical)

1 2 3 4 5 6 7 8 9

OSD HELP MSG LANGUAGE

SYSTEM ATS OPTION AUTO CLOCK S-Modulation TTX TTX DEFAULT

Adjust

EUROPE

OFF(Fix)

54%

FLOF

Range

ON/OFF

EUROPE/RUSSIA/ARAB

CF/CI/CW/CX/CB/CII

ON/OFF ON/OFF

54%/80%/100%

ON/OFF

FLOF/LIST

4-2-5 RESET

The Reset Mode is used during factorying inspection Function Reset : After Factorying Reset, the following items itens revert to their initial values.

1. Volume 11

2. Program Channel 0

3. P- STD MEMORY

4. Auto Power OFF

5. NR OFF

6. Skip(Store/Clear) ALL CLEAR

Cautim : When the EEPROM is replaced ; all items revert to their initial values.

Alignment and Adjustments (Electrical)

4-3 Other Adjustments

4-3-1 General

1. Usually, a color TV needs only slight touch-up adjustment upon installation.

Check the basic characteristics such as height, horizontal and vertical sync and focus.

2. The picture should have good black and white

details. There should be no objectionable color shading; if color shading is present, perform the purity and convergence adjustments described below.

3. Use the specified test equipment or its

equivalent.

4. Correct impedance matching is essential.

5. Avoid overload. Excessive signal from a sweep

generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test results.

6. Connect the TV only to an AC power source

with voltage and frequency as specified on the backcover nameplate.

7. Do not attempt to connect or disconnect any

wires while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.

8. To protect against shock hazard, use an isolation transformer.

4-3-2 Automatic Degaussing

A degaussing coil is mounted around the picture tube, so that external degaussing after moving the TV should be unnecessary. But the receiver must be properly degaussed upon installation.

The degaussing coil operates for about 1 second after the power is switched ON. If the set has been moved or turned in a different direction, disconnect its AC power for at least 10 minutes.

If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this happens, use an external degaussing coil. Slowly move the degaussing coil around the faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to a distance of about 6 feet before removing power.

4-3-3 High Voltage Check

CAUTION: There is no high voltage adjustment on this chassis. The B+ power supply must be set to +130 volts (Full color bar input and normal picture level).

1. Connect a digital voltmeter to the second anode of the picture tube.

2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current).

3. The high voltage should not exceed 30KV.

4. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 30KV under any conditions.

Alignment and Adjustments (Electrical)

4-3-4 FOCUS Adjustment

1. Input a black and white signal.

2. Adjust the tuning control for the clearest picture.

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

4-3-5 Screen Adjustment

1. Turn to the ACTIVE channel.

2. Adjust the VR screen for a normal picture is (no blooming or flyback line).

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

4-3-6 Purity Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Plug in the CRT deflection yoke and tighten the clamp screw.

3. Plug the convergence yoke into the CRT and set in as shown in Fig. 5-1.

4. Input a black and white signal.

5. Fully demagnetize the receive by applying an external degaussing coil.

6. Turn the CONTRAST and BRIGHTNESS controls to maximum.

7. Loosen the clamp screw holding the yoke. Slide the yoke backward or forward to provide vertical green belt. (Fig. 5-2).

8. Tighten the convergence yoke.

9. Slowly move the deflection yoke forward, and adjust for the best overall green screen.

10. Temporarily tighten the deflection yoke.

11. Produce blue and red rasters by adjusting the low-light controls. Check for good purity in each field.

12. Tighten the deflection yoke.

Alignment and Adjustments (Electrical)

TILT (TC)

AFC BOW (HB)

H SIZE

PIN COMP (PEP)

H POSITION (PHS)

V LINEARITY (SL)

UP CPIN (PEUC)

V S CORRECTION (SC)

AFC ANGLE (HP)

V POSITION (PVS)

LO CPIN (PELC)

V SIZE(VA)

4-3-7 I C BUS GEOMETRIC Adjust

Alignment and Adjustments (Electrical)

4-3-8 White Balance Adjustment

4-4-7 (A) HIGH-LIGHT ADJUSTMENT

1. Input either a Lion Head or a “pure white” pattern.

2. Warm up the TV for 30 minutes.

3. Check the data in the Service Mode

4. Adjust RG, BG in the Factory Mode.

5-4-7 (B) LOW-LIGHT ADJUSTMENT

1. Automatically accomplished during the high-light adjustment.

Fig. 5 -1 Convergence Magnet Assembly

Fig. 5-2 Center Convergence Adjustment

Alignment and Adjustments (Electrical)

4-3-8 Center Convergence Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Adjust the two tabs of the 4 pole magnets to change the angle between them. Superimpose the red and blue vertical lines in the center area of the screen.

3. Adjust the Brightness and Contrast controls for a well defined picture.

4. Adjust the two-tab pairs of the 4 pole magnets, and change the angle between them. Superimpose the red and the blue vertical lines in the center area of the screen.

5. Turn the both tabs at the same time, keeping the angle constant, and superimpose the red and blue horizontal line in the center of the screen.

6. Adjust the two-tab pairs of the 6-pole magnets to superimpose the red and blue line onto the green. (Changing the angle affects the vertical lines, and rotating both magnets affects the horizontal lines.)

7. Repeat adjustments 2~6, if necessary.

8. Since the 4-pole magnets and 6-pole magnets interact, the dot movement is complex (Fig. 5-3).

Fig 5-3 Center Convergence Adjustment

Troubleshooting

Samsung Electronics 5-1

5. Troubleshooting

5-1 No Power (No Picture on)

Yes

Check

both terminal voltages

of C815 (130V)

Check both

terminal voltages of

C804 (280~300V).

Check D801S

F801,Q801.

Is IC801S Pin 3

19~22V?

Check IC801S

Check/Replace

DZ801,DZ808,

DZ802,PC801S

Yes

Check

Voltage of 80V, 15V, 20V,

13V power line..

Check whether each power line is short or open.

Yes

Is IC901

Pin 64 Voltage 5V?

Check H.V SYNC on

IC901 Pins 36,37

Check/Replace

IC901.

Check

IC901 Pin 20 is High

when power is On.

Check/Replace

IC902.

Check the voltage

of TU01S.

Yes

5-2 No Power (No LED On)

Troubleshooting

5-2 Samsung Electronics

Check IC901 #31

Check IC901 #52, #53

Check after Bus

Line Open

Yes

Check IC904

Check another I2C

Bus Line.

Check IC805

Check D805

Check IC801S

Replace

Yes

Check IC901 #50~52

Replace

IC901

5-3 No RF Picture / Sound

Troubleshooting

Samsung Electronics 5-3

Check IC901 #52, #53

Check chroma inodule

H-out

Yes

Yes (No Sound)

Check Tuois

SDA,SCL

Check Q402,Q401

Replace

Check

c/module, R405,R435

R424,R425,D411,

D401

Yes

Check Tuner SIF

output?

Check Sound module

B+, 5V,8V

Check 8V, 5V

Power Line

No Picture

Yes

Sound Module Replace

Replace

Troubleshooting

5-4 Samsung Electronics

5-4 DVD PLAY NO PICTURE

Check CN201

y-cut,c-out

Check chroma module

Yes

Check DVD

Replace

Check CN201

D-L, D-R

Check Sound module

Yes

Check DVD

Replace

5-5 DVD PLAY NO SOUND

Troubleshooting

Samsung Electronics 5-5

5-6 No Picture (Sound OK)

1 Check the Brightness, Contrast and Color adjustments

2. Check: AV Picture

3. See Video Block Diagram

5-7 No Sound (Picture OK)

1. Check the Volume adjustment level.

2. Check AV Video

3. See Audio Block Diagram

5-8 RF Weak Signal (Playback, AV Mode OK)

1. Check Tuner (TU01S) B+. Check: 8V (IC802) 33V (DZ201). Check 5V (IC804)

5-9 No Vertical SCAN

1. Check R425, D401

2. Check IC301, #2

3. Check Chroma module Vertical-out Line

4. Check DY Connector

5-10 Horizontal Size

1. Check L406, C411, R421, Q403, D404, R413, R405

5-11 On-Screen Display Missing

1. Check IC901 #32, #33, 34

2. Check Chroma module

5-12 No Teletext

1. Check IC901 #30

2. Check IC901 #24 (CVBS)

Troubleshooting

5-6 Samsung Electronics

5-13 DVD Block Troubleshooting

LD is outputted

from object lens

at play key input?

Yes

Check open state from

DRIC4 to pick-up.

Check RIC1 and A,B,C,D input.

Check SIC3.

No Disc recognitionNo Disc recognition

FE om SOC1-25

is within specified

range?

Yes

SIC3-1,2 output

are mormal?

Yes

No Focus incomingNo Focus incoming

No focus incoming and

no disc occurs

Troubleshooting

Samsung Electronics 5-7

SLD, SIC-34

output is normal?

Yes

LED+, SLED-

SIC3-32,33 output are

normal?

Yes

Check the Sled Motor and connection

No pick-up home positingNo pick-up home positing

Check MIC1

Divide RQ1 emitter terminal

voltage and 5V real voltage

difference into 10ohm.

Open check in related circuit.

LD out pick-up replace.

Check MIC1

Check SIC3

RIC1-21 is 5V?

Yes

Current exceeds 0.1A?

Yes

NO LD CD ON

Troubleshooting

5-8 Samsung Electronics

MIRR, SIC1-157

output is normal?

Yes

Actual velocity occurs

at SIC1-34 terminal?

Yes

Actual velocity occurs

at SIC4-32,33 terminal?

Yes

TE occurs in

search range?

Focus On?

Yes

Check RIC1 Peripheral curcuit.

Check SIC1 Peripheral curcuit.

Time out due to many jump counts

No Search Operation

No No

FINE SEEK MIRR

signal(RIC1-46) is missing?

Yes

TZCO signal

(SIC1-24)is occurs?

Yes

Check RIC1-26 terminal.

Check SIC3 peripheral circuit.

Check SIC1 peripheral circuit.

Check DCN1 and pick-up.

Check MECHA.

Track incomming is

delayed?

Yes

TE is within

2V and 3V?

SIC1-33 output

are normal?

SIC3-28,29

terminaloutputs

are normal?

Yes

Pick-up transfer smooth.

Yes

FINE SEEK Check

RF AGCO, RIC1-72

Output level is

normal?

Yes

Check RIC1 peripheral circuit.

Check SIC1 peripheral circuit.

Check SIC3 peripheral circuit.

See "Fine Seek Check"

Check pick-up.

Troubleshooting

Samsung Electronics 5-9

SPD output is normal?

(SIC1-35)

Yes

SIC3-2 output(FG)

is normal?

Yes

SIC3-9 signal

MON is "H"?

Yes

Micom(MIC1) error

Check SIC3

Abnormal rotation of Abnormal rotation of

disc motordisc motor

MIC1-84,85 is

Open;"L","L"?

Close;"H","H"?

Yes

Check SIC3-35,36

output open/close

Yes

Check signal line state from

SIC3-35,36 to tray motor.

No Tray open/closeNo Tray open/close

RIC1-70 output

are normal?

Yes

Check path to RIC1 and SIC1

After resoldering SIC1

Check SIC3 soldering and power

Check SIC1, MIC1.

Check or replace disc motor

Check RIC1 doldering and power

Input of RF signal

is normal?(SIC1-15)

RIC1-71 output

is normal?

Yes

Check RIC1 peripheral

circuit and A,B,C,D

Troubleshooting

5-10 Samsung Electronics

Check DIC1,MIC1 peripheral short

Check 27MHz oscillating part.

Replace SIC1

DVD play error

'NO DISK'appers

afrer pick-up moves up and

down twice at power on?

27MHz clock is

input in DIC1-14?

Yes

Signals are output

from SIC1-42,44?

Yes

ZIC1 peripheral soldering

and short check.

Check the connection between

pin 1 in PCNS1 and pin 3 in ZIC5

Check the connection between

pin 6 in ZIC4 and pin 129 in ZIC1

Check the soldering of ZIC1

DVD Video output error

Pin of VDD-2.5&

VDD-3.3 in ZIC1 has

normal level?

27MHz clock is

input is normal at

pin 159 in ZIC1?

Yes

Anlog output is

normal at pin133 in

ZIC?

Yes

Check the connection between

pin 133 in ZIC1 and ICD302

Check the connection between

ICD302 and emitter of ICD105

Check the connection between

pin23 in ICD601 and pin in ICD302

Analog signals are

inputted normally

pin7 in ICD302

Yes

Power is normal

at pin16 in ICD302?

Yes

Check IC202-5,6 and IC701-8

Pin 1 in ICD302

is in low stste?

Yes

Check the soldering of ICD302

Output level is normal

at pin10,14,15(Y signal)and

pin12,13(C signal) in ICD302?

Yes

Troubleshooting

Samsung Electronics 5-11

ICD502-1,7 OUTPUT

is normal?

Yes

Bast terminal level

QD501,502

are"L"?

Yes

Check ZIC1 perpheral circuit.

Check ICD503

CD/VCD/DVD L/R output error

(Mixed Audio output)(Mixed Audio output)

Output in ZIC1-127

is normal?

Yes

Output in

ICD503-6,8,10 is

normal?

Yes

Check JKD501 peripheral

soldering shot.

Digital output errorDigital output error

Check ICD502 peripheral circuit

Check ICD601-3 mute.

Normal DA-DATA 0

input in ICD501-6

Yes

Analog output of

ICD501-20,21,22,23 is

normal?

Yes

Check ZIC1-121 output.

Check ZIC1-125

(CD/VCD;16.934MHz,

DVD;18.432MHz)

Check MSP3451G peripheral circuit

Troubleshooting

5-12 Samsung Electronics

Check the remote

pules is input to ICD601

pin47?

Yes

Key or Rmote control Key or Rmote control

doesn't Operate

Check the component and pattern

between CND004 and ICD601

Check VCC and X-TAL of

ICD601 (XTC601)

Check the specigications of CN001

pins 1~5,7,9 and TV MICOM

(IC901)

Check the key Desn't

Operate

Check 5V is output from the

QD103 emitter.

Check RMD701 located on the

Control Board

Check 5V is input

to CN004 pin 10

Key doesn't operate

Rmote control doesn't operate

When any key is

pressed, check an input data si

output from CN004

pins7,8,9?

Yes

When the remote

control operates,check the

remote pulse is input to

CN004 pim13?

Yes

Check 8MHz is

normaloscillated from

IC601 pin40,41?

(Check 8V is input to CND001 pin11)

5-14 Trobleshooting

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