Daewoo SL-300V, DLV-42C7LMB, DLV-37C7LMB, DLV-32C7SMB Service Manual

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

LCD TV

CHASSIS :

Model :

S/M NO. : TSL300VEF1

DLV-32C7SMB DLV-37C7LMB DLV-42C7LMB

MAR. 2007

SL-300V

Contents

1. Safety Precaution 3

2. Preliminary Troubleshooting 4

3. Product Specification 5

1) Standard of Product 5

2) Available Input Signal 6

3) Available PIP Mode 6

4. Service Remote Controller 7

1) Key Arrangement 7

2) EEPROM Data 8

5. Block Diagram 11

6. Hardware Troubleshooting : Digital Board 12

7. Hardware Troubleshooting : SMPS 16

1) FEL-3237A : DLV-32C7SMB, DLV-37C7LMB 16

2) FEL-42C1 : DLV-42C7LMB 18

8. Bill Of Materials 20

1) DLV-32C7SMB 20

2) Differental Materials Besides Mechanical Parts 29

9. How to S/W Upgrade Tools 30

1) Requirements 30

2) Outline of the S/W upgrade tool, which is DTV_Updater.exe 30

3) How to upgrade decoder of LCD TV 31

4) How to upgrade PIC micom of LCD TV 35

10. Schematics : Digital Board 40

11. Schematics : SMPS 49

1) FEL-3237A : DLV-32C7SMB, DLV-37C7LMB 49

2) FEL-42C1 : DLV-42C7LMB 50

12. Mechanical Development Figure 51

1) DLV-32C7SMB 51

2) DLV-37C7LMB 52

3) DLV-42C7LMB 53

-2-

1. Safety Precaution

-3-

(1) When moving or laying down a LCD Set, at least two people must work together. Avoid any

impact towards the LCD Set.

(2) Do not leave a broken LCD Set on for a long time. To prevent any further damages, after

checking the condition of the broken Set, make sure to turn the power (AC) off.

(3) When opening the BACK COVER, you must turn off power (AC) to prevent any electric

shock.

(4) When loosening screws, check the position and type of the screw. Sort out the screws and

store them separately for reassembling. Because screws holding PCBs are working as electric circuit grounding, make sure to check if any screw is missing when assembling / reassembling. Do not leave any screws inside the set.

(5) A LCD Set contains different kinds of connector cables. When connecting or disconnecting

cables, check the direction and position of the cable beforehand.

(6) Connect/disconnect the connectors slowly with care especially FFC (film) cables and FPC

cables. Do not connect or disconnect connectors instantaneously with force, and handle them carefully for reassembling.

(7) Connectors are designed so that if the number of pins or the direction does not match,

connectors will not fit. When having problem in plugging the connectors, check their kind, position, and direction.

2. Preliminary Troubleshooting

-4-

1) LCD TV does not response or remote controller does not work.

- Check the power cord to be plugged.

- Check the battery of the remote controller.

2) Sound is discontinuous or broken sometimes.

- Check if [SOUND] -> [AVC] is [ON].

- Set the sound effect into 'F Mono'.

- Set the [SOUND] -> [DTV Volume] into proper value.

- [DTV Volume] is enabled only in digital program.

3) Picture of digital program is sometimes broken and sound is discontinuous.

- Digital program has a little problem because of signal receiving status.

- Check if the RF cable is correctly connected.

- Ask for the broadcasting station if the RF cable connection has no problem.

4) Picture of analog program is noisy.

- Check the RF cable connection.

- Check if [Picture] -> [Noise Reduction] is ON.

- Change the [Install] -> [Programme Setup] -> [Fine] value.

5) Sound is not generated in HDMI mode.

- Reconnect HDMI jack.

- DVI signal has no sound. Check the output signal of device to be connected to LCD TV.

- If you want to use DVI-HDMI cable, you should also connect audio cable into the LCD TV.

6) In spite of 'Auto Setup', picture size is not completely adapted to the screen.

- Check if the input signal is available.

- Ensure that the desktop has no black area.

- Some errors (picture position problem) will be occurred according to certain video card. In this case, you should adjust 'Frequency' control.

7) In spite of 'Auto Setup', picture is not clear.

- Adjust 'Phase' control.

3. Product Specification

-5-

1) Standard of Product

Owing to our policy of continuous improvement, specifications may change.

Features DLV-32C7SMB DLV-37C7LMB DLV-42C7LMB

LCD Panel Panel Model LTA320WT-LF2 LC370WX1-SL01 LC420WX5-SLA1

Screen Size 81 cm 93 cm 106 cm

Aspect Ratio 16 : 9 16 : 9 16 : 9

Resolution 1366 X 768 1366 X 768 1366 X 768

(WXGA) (WXGA) (WXGA)

Pixel Pitch 0.51075 mm 0.60000 mm 0.68100 mm

Contrast Ratio 5000 : 1 (MAX) 5000 : 1 (MAX) 5000 : 1 (MAX)

Brightness 550 cd/m

500 cd/m

TV System Receiving DVB-T DVB-T DVB-T

System PAL-B/G PAL-B/G PAL-B/G

PAL-B/H PAL-B/H PAL-B/H

NTSC (AV) NTSC (AV) NTSC (AV)

LVDS Cable FI-E30S FL-X30SSL-HF FL-X30SSL-HF

LVDS B+ +5V +12V +12V

Input Connector RF 50 Ohm Coaxial 50 Ohm Coaxial 50 Ohm Coaxial

S-Video / Video 2 2 2

Component RCA X 2 RCA X 2 RCA X 2

PC RGB D-Sub X 1 D-Sub X 1 D-Sub X 1

PC Audio 3.5 mm Mini - Jack 3.5 mm Mini - Jack 3.5 mm Mini - Jack

HDMI 1 1 1

Output SPDIF Optical - Jack Optical - Jack Optical - Jack

Connector Headphone X X X

Monitor - out 1 1 1

Sound Output Max. 10W 10W 10W

Power Module Model FEL-3237A FEL-3237A FEL-42C1

Power Max. 155W 195W 198W

Consumption Power Source 220-240V~ 220-240V~ 220-240V~

50-60Hz 50-60Hz 50-60Hz

Dimension Set Dimension

806 x 628.5 x 240 mm 940 x 720 x 328.7 mm 1037 x 788.7 x 328.7 mm

(W x H x D) (with stand)

Set Dimension

806 x 574.5 x 114 mm 940 x 655 x 130 mm 1037 x 723.8 x 124.9 mm

(without stand)

Wall Mount Dimension

315 x 235 x 50 mm 315 x 235 x 50 mm 698 x 460 x 46.6 mm

Hall Size

100 x 200 screw ø 4mm 100 x 200 screw ø 4 mm 400 x 600 screw ø 6 mm

Product Specification

-6-

2) Available Input Signal

INTERFACE SOURCE VF INTERFACE SOURCE VF

RF PAL-B/G, B/H 50Hz HDMI 640x480 60Hz

DVB-T 50Hz 640x480 75Hz

VIDEO PAL-B/G, B/H 50Hz 800x600 60Hz

PAL-60 60Hz 800x600 72Hz

NTSC-M 60Hz 800x600 75Hz

NTSC-443 60Hz 1024x768 60Hz

S-VIDEO PAL-B/G, B/H 50Hz 1024x768 70Hz

PAL-60 60Hz 1024x768 75Hz

NTSC-M 60Hz 1280x1024 60Hz

NTSC-443 60Hz 1360x768 60Hz

COMPONENT 480i 60Hz 480p 60Hz

480p 60Hz 576p 50Hz

576i 50Hz 720p 50Hz

576p 50Hz 720p 60Hz

720p 50Hz 1080i 50Hz

720p 60Hz 1080i 60Hz

1080i 50Hz

1080i 60Hz

PC 640x480 60Hz

640x480 75Hz

800x600 60Hz

800x600 72Hz

800x600 75Hz

1024x768 60Hz

1024x768 70Hz

1024x768 75Hz

1280x1024 60Hz

1360x768 60Hz

3) Available PIP Mode

MODE Analog RF Digital RF VIDEO 1 VIDEO 2 COMP 1 COMP 2 HDMI PC

ATV X X X X OOXX

DTV X X OOOOXX

VIDEO 1 X O XXXXXX

VIDEO 2 X O XXXXXX

COMP 1 OOXXXXXX

COMP 2 OOXXXXXX

HDMI X XXXXXXX

PC XXXXXXXX

4. Service Remote Controller

-7-

1) Key Arrangement



ChSet

Recall

HEAT-RUN

SVPPX

MPEG

Pattern

MISC

Volume

Hotel Lock

W/B

PreScale

Reset

Service Remote Controller

-8-

2) EEPROM Data

Key Content Default Value Description

S2 ChSet Panel Model SS32 Current LCD Panel

EDID & Ch Set 0 EDID & CH Update

S3 Volume Volume Test 0 Don't Care

S4 SVPPX PAL Sub Brt 0x20 ATV Bright Control

PAL Sub Cont 0x80 ATV Contrast Control

AV Sub Brt 0x20 Video Bright Control

AV Sub Cont 0x80 Video Contrast Control

Video Sub Cb Sat 0x80 Video Cb Color

Video Sub Cr Sat 0x80 Video Cr Color

Video Sub Hue 0x0 Video Hue

Video YC Delay 0x0 Video YC Delay

Pedestal ON Pedestal Level ON/OFF

Chroma AGC 0x8A Sub Carrier AGC

CVBS AGC ON CVBS AGC

Anti-alias OFF Anti-alias ON/OFF

PC G Clamp 0x44 PC G Clamp Level Control

PC B Clamp 0x44 PC B Clamp Level Control

PC R Clamp 0x44 PC R Clamp Level Control

PC G Gain 0x50 PC G Gain Control

PC B Gain 0x50 PC B Gain Control

PC R Gain 0x50 PC R Gain Control

Com 480i Y Clamp 0x30 480i Y Clamp Level Control

Com 480i Pb Clamp 0x200 480i Pb Clamp Level Control

Com 480i Pr Clamp 0x200 480i Pr Clamp Level Control

Com 480i Y Gain 0x50 480i Y Gain Control

Com 480i Pb Gain 0x50 480i Pb Gain Control

Com 480i Pr Gain 0x50 480i Pr Gain Control

Com HD Y Clamp 0x30 480p~ Y Clamp

Com HD Pb Clamp 0x200 480p~ Pb Clamp

Com HD Pr Clamp 0x200 480p~ Pr Clamp

Com HD Y Gain 0x50 480p~ Y Clamp

Com HD Pb Gain 0x50 480p~ Pb Clamp

Com HD Pr Gain 0x50 480p~ Pr Clamp

Sync Threshold 0x0 Component Sync Slicing Level Control

S5 PQ Dp B/L Cont 0 Black & White Contrast

Main CVBS Cont 128 Main Picture CVBS Contrast

Main CVBS Bright 128 Main Picture CVBS Brightness

Main DTV Cont 128 Main Picture DTV Contrast

Main DTV Bright 112 Main Picture DTV Brightness

Main HDMI Cont 128 Main Picture HDMI Contrast

Main HDMI Bright 128 Main Picture HDMI Brightness

Main Comp PC Cont 130 Main Picture COMP & PC Contrast

Service Remote Controller

-9-

Key Content Default Value Description

Main Comp PC Bright

120 Main Picture COMP & PC Brightness

PIP CVBS Cont 128 Sub Picture CVBS Contrast

PIP CVBS Bright 138 Sub Picture CVBS Bright

PIP DTV Cont 138 Sub Picture DTV Contrast

PIP DTV Bright 128 Sub Picture DTV Brightness

PIP COMP Cont 128 Sub Picture COMP Contrast

PIP COMP Bright 128 Sub Picture COMP Brightness

Dp Hue 64 Main Picture Tint Control

Main V Delay 8 Main Picture Cr Delay

Main U Delay 8 Main Picture Cb Delay

Sub V Delay 8 Sub Picture Cr Delay

Sub U Delay 8 Sub Picture Cb Delay

Peaking 38 Peaking Control

APL Enable ON APL Enable

APL Luma Factor 192 APL Luma Factor

APL Gain 128 APL Gain

Filter 0 Band Pass Filter

Gamma Enable ON Gamma Enable

Hotel Lock

CH Preset Lock OFF Auto Programme function ON/OFF

Volume Max 100 Max Volume

AV Lock OFF AV Lock ON/OFF

Child Lock OFF Child Lock ON/OFF

RF Auto YES Auto shutdown without signal at RF

S7 MPEG DTV V Size 100 Don't Care

DTV H Size 93 Don't Care

DIAHighThreshold Y

0Don't Care

DIAHighThreshold C

0Don't Care

DIALowThreshold Y

0Don't Care

DIALowThreshold Y

0Don't Care

S8 WB Bias R 31 R Bias

Bias G 31 G Bias

Bias B 34 B Bias

Gain R 22 R Gain

Gain G 32 G Gain

Gain B 30 B Gain

Sub Brt 31 Don't Care

Sub Cont 0 Don't Care

Contrast-R 1.039 Don't Care

Contrast-G 1.078 Don't Care

Contrast-B 1.070 Don't Care

PreScale

SC Pscale 22 Don't Care

FM Pscale 24 Don't Care

Service Remote Controller

-10-

Key Content Default Value Description

Stereo ID 10 Don't Care

Dimming(LCD) 255 Don't Care

SSC Enable ON Spread Spectrum ON/OFF

SSC Delta 0 Don't Care

SSC posi 0 Don't Care

SSC nega 0 Don't Care

BBE Level 48 BBE Level

MVOICE Level 96 MVOICE Level

Sound Delay(ms) 40 Sound Delay

S10 MISC Panel Model SS32 Current LCD Panel

EDID Update OFF EDID Update

Model SL-300V Chassis

S/W Version SL-300V_##_####_L######V#DP Decoder S/W Version

Micom Version SL-300V_L######V##M PIC Micom S/W Version

Micom Update OFF Micom Update Mode

OS_DbgPrintf OFF Debugging Mode

Digital Signal Status OFF Digital Signal Status

Digital Index Status OFF Don't Care

RF Software Update OFF RF S/W Update Mode

S1 HeatRun Enable OFF HeatRun Enable Mode

Digital Index level 0 Don't Care

S11 Pattern Test Pattern 0 Don't Care

S12 Reset Factory Reset 0 Factory Reset

Eeprom Reset 0 EEPROM Reset

• [S12] -> [Reset] -> [Eeprom Reset] : EEPROM has default value.

• [S10] -> [MISC] -> [Panel Model] : This data should be set according to each model

: DLV-32C7SMB -> SS32 : DLV-37C7LMB -> LG37 : DLV-42C7LMB -> LG42

• [S5] -> [PQ] -> [Brightness & Contrast] : This data can be changed only in each mode. : For example, [Main DTV Cont] value can be

changed only in DTV mode.

• [S6] -> [Hotel Lock] -> [CH Preset Lock] :

ON means [Auto Programme] can not be functioning.

• [S6] -> [Hotel Lock] -> [Volume Max] : This value will be max volume of user control.

• [S6] -> [Hotel Lock] -> [AV Lock] : ON means the unit will be locked at AV1.

• [S6] -> [Hotel Lock] -> [Child Lock] : ON means the side buttons will not be functioning.

• [S6] -> [Hotel Lock] -> [RF Auto] : ON means the unit will be turned off automatically

after 30 minutes without signal at RF mode.

5. Block Diagram

-11-

Signal Block Diagram : ZORAN

6. Hardware Troubleshooting : Digital Board

-12-

1) In spite of sound output, the screen is black.

1.1 In case of ATV, DTV, VIDEO and COMPONENT mode.

START

Check the SMPS

and input voltage

IC501 Problem.

Replace the Main PCB

IC501 Problem.

Replace the Main PCB

1) TV mode : Check the path from Pin 8 of TU101 to Pin Y4

of IC501

2) Component mode : Check the path from input jack to Pin

V6, W9, Y8(Comp 1) and W6, Y9, W8(Comp 2) of IC501

3) Video mode : Check the path from input jack to Pin

Y10(Video 1) and V8(Video 2) of IC201

Perhaps Connector and Cable

Problem.

Replace the Main PCB

Check

the input power of

IC501 is correct

Yes

Check

the LVDS connector and cable

is correct

Is the input signal of IC501 normal?

Check

the LVDS signal output of IC501 is correct

(Pin A14, B14, A15, B15, A16, B16, A17,

B17, A18, B18, A19, B19)

Yes

Hardware Troubleshooting : Digital Board

-13-

1.2 In case of PC and HDMI mode

START

Check the input resolution

of external device

IC501 Problem.

Replace the Main PCB

IC501 Problem.

Replace the Main PCB

1) PC mode : Check the path from Jack to Pin Y7, W10 and

2) HDMI mode : Check the path from input jack to Pin M2,

M1, N2, N1, P2, L2, L1, U11 and T1 of IC501

Perhaps Connector and Cable

Problem.

Replace the Main PCB

Check

PC/HDMI resolution to

available resolution in

LCD TV

Yes

Check

the LVDS connector and cable

is correct

Is the input signal of IC501 normal?

Check

the LVDS signal output of IC501 is correct

(Pin A14, B14, A15, B15, A16, B16, A17,

B17, A18, B18, A19, B19)

Yes

Check the SMPS and

input voltage

Check

the input power of

IC501 is correct

Yes

Hardware Troubleshooting : Digital Board

-14-

1.3 In case of DTV mode

START

Select Air/Cable in Ant. Set correctly

Check the SMPS and input voltage

IC501 Problem.

Replace the Main PCB

Check the path from

TU101 to IC101

Check

1. The SNR is over 15dB

2. “Get 1SecSer” is “0”

The signal quality is poor.

1. Check the ANT or its connection is correct

2. Consult a local installer.

Perhaps Connector and Cable

Problem.

Replace the Main PCB

Check

the “Ant. Set” is correct

in Menu

Yes

Check

the LVDS connector and cable

is correct

Check

the LVDS signal output of IC501 is correct

(Pin A14, B14, A15, B15, A16, B16, A17,

B17, A18, B18, A19, B19)

Yes

Check

the input power of

IC501 is correct

Is “Lock status” “1(LOCK)”

when “Digital signal status” is

“on” in Service mode S10?

Yes

Check the path from IC301 to IC501

Yes

Does

digital signal input from IC301

to IC501

Check the path from IC301 to IC501

Yes

Does

TS signal input from IC101

to IC301

Yes

Hardware Troubleshooting : Digital Board

-15-

2) In spite of picture display, the sound is not generated.

START

1. Confrim AC connection

2. Confrim Power S/W on

3. Check Video or other PCBs

Check the connection of jack

Does screen appear?

Yes

Is the Sound input Jack

correctly connected?

Check the connection of speaker

Yes

Is the speaker correctly

connected?

Check the SMPS and input voltage

Yes

Check

the input power of IC602 is normal

(Pin 4, 7, 12, 15)

Check the path from IC602 to Speaker

Check

the signal output of IC602 is normal

(Pin 8, 9, 16, 17)

Yes

Perhaps IC602 problem.

Replace main PCB

Check

the signal output of IC601 is normal

(Pin 31, 33)

Yes

Perhaps IC601 problem.

Replace main PCB

Digital TV mode : Check the path from Pin 7

of IC601 to Pin T2 of IC301

HDMI mode : Check the path from Pin 21

of IC601 to Pin V12 of IC501

Analog TV mode : Check the path from Pin 55

of IC601 to Pin 10 of TU101

Video, Component mode : Check the path from

each Pin of IC601 to each jack

Check

the input signal of IC601is

normal

Yes

7. Hardware Troubleshooting : SMPS

-16-

1) FEL-3237A : DLV-32C7SMB, DLV-37C7LMB

'CHECKING FLOW ABOUT INFERIOR SMPS' (MODEL NAME : FEL-3237A)

PAGE : 1/2

1. Stand-by 5V is working out.

A. Can you check In-put voltage(DC) of the capacitor(Location No. : C22)?

2. MAIN Out-put voltage is working out but Stand-by 5V is working.

A. Can you check that it is working normal at Power On after dischanging for 1 minute from Power Off?

YES : It's protection due to out-put short of the moment through worker's carelessness.

NO : Checking 2.1 item.

A. Is Power On signal(3.3V) supplied to Base of Q4?

YES

YES 1.1 Checking open and short of Out-put side wire cable.

1.2. Checking open and short of the around parts that was connected IC3(STR-A6151). (Location No. : R4, R5, D4, D5, D7)

1.3. Checking open and short of IC3's each pins.

1.4. Checking open and short of 5V's Out-put diode. (Location No. : D13)

1.5. Can you check the Fuse(F1) condition(open and short)?

YES : Checking 1.2 item after changing FUSE. NO : Checking 1.6 item.

1.6. Checking open and short of BD1, BD2.

YES : Changing BD1, BD2. NO : Checking open and short of Z1, LF1, LF2, C1, C2.

A. Can you check that Vcc voltage of IC3 was supplied from DC15V to DC27V?

YES

2.1. Can you check the D4's condition(open and short)?

YES : Changing D4. NO : Checking 2.2 item.

2.2. Is Relay connected?

YES : Checking 2.3 item. NO : Changing Relay.

2.3. Can check the voltage(AC 400V) of AC rectifying side C23?

YES : Checking 2.5 item. NO : Checking 2.5 item after checking the conditions(open and short) of the around

parts that was connected IC1. (Location No. : R14, R65, Q1, D1, D23, D12, IC1)

YES 2.4. changing Q4.

B. Can you check the Q4's condition(open and short)?

C. Can you check that Vcc voltage of IC2's No.12pin was supplied from DC10V to DC12V?

2.5. Can you see the square wave(400mV, 32kH) of Q2's source side when DC 13V was supplied to IC2's No.12pin from DC POWER SUPPLY?

(CAUTION : Test do it after AC Power Off)

YES : Checking 2.1 item after checking diode's condition(open and short) of Main Out-put side.

(Location No. : D17, D18, D19, D16, D15, D14)

NO : Checking open and short of the around parts that was connected IC2.

(Location No. : Q2, Q3, D25, D26, D24, R31, R32, R35, R36, R38, D9, D10, C17)

YES 2.6. Checking open and short of MAIN BOARD.

2.7. Checking open and short of MAIN BOARD.

Hardware Troubleshooting : SMPS

-17-

'CHECKING FLOW ABOUT INFERIOR SMPS' (MODEL NAME : FEL-3237A)

PAGE : 2/2

3. 5V's Out-put voltage is measured too high or low.

A. Checking open and short of IC7.

B. Checking open and short of R24, R25.

C. Checking open and short of IC6.

4. 5V's Out-put voltage is work with intermittent mode.

A. Is R5's condition good from open and short?

YES : changing R5. NO : Checking 1.3 and 1.4 items.

(Checking open and short of MAIN BOARD if that 1, 3 and 1.4 items are no problem.)

5. Out-put voltage(DC12v, 24v, 30v) is measured too high.

A. Checking open and short of IC5.

B. Checking open and short of R44, R43.

C. Checking open and short of IC4.

6. Out-put voltage(DC12v, 24v, 30v) is measured too low.

A. Checking open and short of IC5.

B. Checking open and short of R44, R43.

C. Checking 2.3 item.

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