Samsung LA40F71BX Schematic
TFT-LCD TV
Chassis GFM40KSA
GFM40CCN
GFM46KSA
GFM46CCN
GFM52KSA
GFM52CCN
Model LA40F71BX
LA46F71BX
LA52F71BX
Manual
SERVICE
TFT-LCD TV Fashion Feature
- Luxurious Slim Design
- Supreme Picture Quality
- Supreme Sound Quality
- Supreme Convenience Quality
- Convenience for Users
ii
Copyright
©2006 by Samsung Electronics Co., Ltd.
All rights reserved.
This manual may not, in whole or in part, be copied,
photocopied, reproduced, translated, or converted to
any electronic or machine readable form without prior
written permission of Samsung Electronics Co., Ltd.
LA40F71B/LA46F71B Service Manual
First edition June 2006.
Printed in Korea.
Trademarks
Samsung is the registered trademark of Samsung
Electronics Co., Ltd.
LA40F71B/LA46F71B and MacMaster Cable Adapter
are trademarks of Samsung Electronics Co., Ltd.
Macintosh, Power Macintosh are trademarks of Apple
Computer, Inc.
All other trademarks are the property of their respective
owners.
Contents
Contents
Samsung Electronics Co.,Ltd.
416, Maetan-3Dong, Yeongtong-Gu, Suwon City,
Gyeonggi-Do, Korea, 443-742
Printed in Korea
P/N : BN82-00145H-00
URL : http://itself.sec.samsung.co.kr/
- This Service Manual is a property of
Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be
punished under applicable International
and/or domestic law.
2 Product Specifications
2-1
2 Product specifications
2-1 Fashion Feature
Wise link (except 52")
- Accept 10 types of Memory Cards including USB (10 in 3 )
Excellent Compatibility. SD/MMC/CF/MD/MS/MSPRO/XD/SM
Smooth Motion Driver
- No ghosting, No Smearing Edge in image
powered by Smooth Motion Driver Engine of Samsung LCD TV
Wide Color Gamut
- More natural and vivid picture quality by WCG (127%)
High Dynamic Contrast
- 7000:1 Highest dynamic Contrast Ratio
Best Off-Angle Viewing
- Widened Viewing Angle , 178
/ 178 (Left/Right)
Real 10 Bit
- Panel 10 Bit + Signal Processing 10 Bit
Game Mode
- Present the most suitable picture for gaming
Swivel Stand
- 20
/ 20 (left/right)
Full HD
- 1080p (1920 x 1080 Pixels)
2 Product Specifications
2-2
2-2 LA40F71B Specifications
LCD Panel
A-si TFT matrix, 40'' Diagonal, 0.46125(H) x 0.15375(v) x 3 mm pixel pitch
Scanning Frequency
Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic)
Display Colors 16.7 M colours
Maximum Resolution Horizontal : 1920 Pixels
Vertical : 1080 Pixels
Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75
, internally terminated
Input Sync Signal Type : Seperate H/V
Level : TTL level
Maximum Pixel Clock rate
166.8 MHz
Active Display
Horizontal/Vertical 885.6 (H) mm / 498.15 (V) mm
AC power voltage & Frequency AC 100 ~ 240V, 50/60Hz
Power Consumption 210 W
Dimensions(W x D x H)
Set
994.0 x 92.0 x 647.0 mm (39.13 x 3.62 x 25.47 inches) Without stand
994.0 x 290.0 x 696.0 mm (39.13 x 11.41 x 27.40 inches) After installation Stand
Weight
Set
(After installation Stand) 24.3 kg (53.57 lbs)
TV System Tunning Frequency Synthesize
System PAL, SECAM, NTSC-M
Sound MONO, STEREO, NICAM
Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Operating Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Storage Humidity : 5 % ~ 95 %
Antena Input 75
- MAX Internal speaker Out : Right : 10W / Left : 10W
- BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic - TREBLE Control Range : -8 dB ~ +8 dB
- Headphone Out : 10 mW MAX
- Output Frequency : RF : 80 Hz ~ 15 kHz
A/V : 80 Hz ~ 20 kHz
Item
Description
2 Product Specifications
2-3
2-3 LA46F71B Specifications
LCD Panel
a-si TFT active matrix, 46" Diagonal, 0.53025(H) x 0.17675(V) x 3 mm pixel pitch
Scanning Frequency
Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic)
Display Colors 16.7 M colours
Maximum Resolution Horizontal : 1920 Pixels
Vertical : 1080 Pixels
Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75
, internally terminated
Input Sync Signal Type : Seperate H/V
Level : TTL level
Maximum Pixel Clock rate
166.8 MHz
Active Display
Horizontal/Vertical 1018.08(H)mm x 572.67(V)mm
AC power voltage & Frequency AC 100~240V, 50 ~ 60 Hz
Power Consumption 300 W
Dimensions(W x D x H)
Set
44.4 x 4.2 x 28.8 inches (1129 x 106 x 732 mm) Without stand
44.4 x 12.8 x 31 inches (1129 x 326 x 788 mm) After installation Stand
Weight
Set
(After installation Stand) 35.5kg (78.26lbs)
TV System Tunning Frequency Synthesize
System PAL, SECAM, NTSC-M
Sound MONO, STEREO, NICAM
Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Operating Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Storage Humidity : 5 % ~ 95 %
Antena Input 75
- MAX Internal speaker Out : Right : 10W / Left : 10W
- BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic - TREBLE Control Range : -8 dB ~ +8 dB
- Headphone Out : 10 mW MAX
- Output Frequency : RF : 80 Hz ~ 15 kHz
A/V : 80 Hz ~ 20 kHz
Item
Description
2 Product Specifications
2-4
2-4 LA52F71B Specifications
LCD Panel
a-si TFT active matrix, 52" Diagonal, 0.6 (H) x 0.2 (V) x 3 mm pixel pitch
Scanning Frequency
Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic)
Display Colors 16.7 M colours
Maximum Resolution Horizontal : 1920 Pixels
Vertical : 1080 Pixels
Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75
, internally terminated
Input Sync Signal Type : Seperate H/V
Level : TTL level
Maximum Pixel Clock rate
166.8 MHz
Active Display
Horizontal/Vertical 1152 (H) mm x 648 (V) mm
AC power voltage & Frequency AC 100~240V, 50 ~ 60 Hz
Power Consumption 310 W
Dimensions(W x D x H)
Set
50.4 x 4.4 x 32.4 inches(1281.0 x 112.7 x 823.4mm) Without stand
50.4 x 12.8 x 34.6 inches(1281.0 x 326.0 x 879.0mm) After installation Stand
Weight
Set
(After installation Stand) 42.6Kg (93.92 lbs)
TV System Tunning Frequency Synthesize
System PAL, SECAM, NTSC-M
Sound MONO, STEREO, NICAM
Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Operating Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Storage Humidity : 5 % ~ 95 %
Antena Input 75
- MAX Internal speaker Out : Right : 10W / Left : 10W
- BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic - TREBLE Control Range : -8 dB ~ +8 dB
- Headphone Out : 10 mW MAX
- Output Frequency : RF : 80 Hz ~ 15 kHz
A/V : 80 Hz ~ 20 kHz
Item
Description
2 Product Specifications
2-5
LA40M71B/LA46M71BModel
Design
Frequency
Horizontal
Vertical
Display Color
30 ~ 61 kHz
100 ~ 120 Hz
16,777,216 colors
30 ~ 61 kHz
60 ~ 75 Hz
16,777,216 colors
PC Resolution
Maximum mode
Input Signal
Sync Signal
Video Signal
Power
Consumption
Normal
Power Saving
205W
< 1W
210W / 300W / 310W
< 1W
H/V Separate, TTL, P. or N.
0.7 Vp-p @ 75ohm
H/V Separate, TTL, P. or N.
0.7 Vp-p @ 75ohm
WXGA, 1366 x 768 @ 60 Hz WXGA, 1920 x 1080 @ 60 Hz
LA40F71B/LA46F71B/LA52F71B
2-4 Spec Comparison
2 Product Specifications
2-6
2-5 Option Specification
Item Item Name
Remote Control
&
Batteries (AAA x 2)
Power Cord
Cover-Bottom
Cleaning Cloth
BN59-00530A (40"/46")
BN59-00593A (52" chinese)
BN59-00594A (52" southeast asian)
3903-000193
3903-000172 (chinese)
BN63-02491A (40")
BN63-02624A (46"/52")
BN63-01798A
Code.No Remark
5 Exploded View & Parts List
5-1
5 Exploded View and Parts List
- You can search for updated part codes through ITSELF web site.
URL : http://itself.sec.samsung.co.kr/
5-1 LA40F71B Exploded View
M0013
T0003
T0003
M0215
M0059
T0003
M0146
T0447
M0014
M0146
M0013
5 Exploded View & Parts List
5-2
5-2 LA40F71B Parts list
Location Code.No Item & Specification Q'ty SA/SNA Remark
T0003 BN96-03412M ASSY COVER P-FRONT;40F71,SO,ABS+PMMA,HB, 1 S.A
T0175 BN96-03271A ASSY SPEAKER P;8ohm,Mosel 32,Left,10W,BA 1 S.A
T0175 BN96-03272A ASSY SPEAKER P;8ohm,Mosel 32,Right,10W,B 1 S.A
M0215 BN07-00288A LCD-PANEL;LTA400HS-LH1,8bit,952*551*51.0 1 S.A
T0447 BN96-03421A ASSY BRACKET P-PANEL;40M7,EO,MOSEL 1 S.N.A
M0014 BN94-01119A ASSY PCB MAIN;LA40F71BX/* 1 S.A
M0013 BN96-04227C ASSY COVER P-REAR;40F71,SO,-,HIPS,HB,BK5 1 S.A
M0013 BN96-03418A ASSY STAND P-BASE;40M70,ABS+PMMA,HB,BK23 1 S.A
5 Exploded View & Parts List
5-3
5-3 LA46F71B Exploded View
M0013
M0013
M0013
M0215
T0175
M0059
M0146
M0014
T0447
M0146
M0146
M0115
T0175
5 Exploded View & Parts List
5-4
5-4 LA46F71B Parts list
Location Code.No Item & Specification Q'ty SA/SNA Remark
T0003 BN96-03411J ASSY COVER P-FRONT;46F71,SO,ABS+PMMA,HB, 1 S.A
T0175 BN96-03593C ASSY SPEAKER P;8ohm,Mosel 46inch,Right,1 1 S.A
T0175 BN96-03591C ASSY SPEAKER P;8ohm,Mosel 46inch,LEFT,10 1 S.A
M0215 BN07-00291A LCD-PANEL;LTA460HS-LH1,8bit,1083*627*56. 1 S.A
T0447 BN96-03420D ASSY BRACKET P-PANEL;46F71.SO,FHD MOSEL 1 S.N.A
M0014 BN94-01119B ASSY PCB MAIN;LA46F71BX/* 1 S.A
M0013 BN96-03417A ASSY STAND P-BASE;46M7,-,ABS+PMMA,HB,BK2 1 S.A
M0013 BN96-04226C ASSY COVER P-REAR;46N71,SO,HIPS,HB,BK500 1 S.A
11 Disassembly and Reassembly
11-1
11 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the TFT-LCD
TV.
WARNING : This monitor contains electrostatically sensitive devices. Use caution when
handling these components.
11-1 Disassembly (LA40F71BX)
Cautions : 1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the
cabinet.
Description Picture Description
1. Place monitor face down on cushioned table.
Remove screws from the Stand.
Remove stand.
11 Disassembly and Reassembly
11-2
3. Disconnet cables from the main and power
boards
Remove screws from the side AV jack.
Description Picture Description
2. Remove screws from the rear-cover and lift up
the rear-cover.
11 Disassembly and Reassembly
11-3
5. Lift up the speakers.
Remove screws from the BRKT.
Description Picture Description
4. Remove screws from the boards and stand
BRKT.
11 Disassembly and Reassembly
11-4
7. Lift up the panel BRKT.
Description Picture Description
6. Lift up the Panel and remove screws.
11 Disassembly and Reassembly
11-5
11-2 Disassembly (LA46F71BX)
Cautions : 1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the
cabinet.
Description Picture Description
1. Place monitor face down on cushioned table.
Remove screws from the Stand.
Remove stand.
11 Disassembly and Reassembly
11-6
3. Disconnet cables from the main and power
boards
Remove screws from the side AV jack.
Description Picture Description
2. Remove screws from the rear-cover and lift up
the rear-cover.
11 Disassembly and Reassembly
11-7
5. Lift up the speakers.
Remove screws from the BRKT.
Description Picture Description
4. Remove screws from the boards and stand
BRKT.
11 Disassembly and Reassembly
11-8
7. Lift up the panel BRKT.
Description Picture Description
6. Lift up the Panel and remove screws.
11 Disassembly and Reassembly
11-9
11-3 Reassembly
Reassembly procedures are in the reverse order of disassembly procedures.
11 Disassembly and Reassembly
11-10
Memo
4 Troubleshooting
4-1
4 Troubleshooting
4-1 First Checklist for Troubleshooting
1. Check the various cable connections first.
- Check to see if there is a burnt or damaged cable.
- Check to see if there is a disconnected cable connection or a connection is too loose.
- Check to see if the cables are connected according to the connection diagram.
2. Check the power input to the Main Board.
3. Check the voltage in and out between the SMPS Main Board, between the SMPS
INVERTER Board, and between the Main LVDS Boards.
4 Troubleshooting
4-2
4-2-1 No Power
4-2 Checkpoints by Error Mode
Does proper DC 12V
appear at CM801?
Change a Assy PCB Power.
Yes
Yes
No
Check a connection a power cable.
No
Does proper DC A3.3V,
A5V appear at
C1034, C1032?
Check a IC109, Q113.
Change a main PCB ass'y.
Yes
No
Does proper DC 5V, 3.3V, 2.5V
1.8V appear at C1024, C1102,
C1140?
Check a IC100, IC114, IC106, IC107,
IC108. Change a main PCB ass'y
Yes
A power is supplied to set?
Check a other function.
(No picture part)
Replace a lcd panel.
No
No
LAMP off, power indicator
LED blue color?
4 Troubleshooting
4-3
4-2-2 No Video (Analog PC)
Check a PC source and check
the connection of DSUB cable?
Input a analog PC signal and
connected cable(DPMS).
Yes
Does the signal appear at
#R5101, R2094, R5105
(R, G, B) of IC502?
PC cable. Change a PC
cable. Change a main PCB ass'y.
Yes
Power Indicator is off.
Lamp on, no video.
No
No
1
Yes
Check a LVDS cable?
Replace a lcd panel?
Please, Call to Samsung Co. LTD.
No
4 Troubleshooting
4-4
WAVEFORMS
1
4 Troubleshooting
4-5
4-2-3 No Video (Digital-HDMI)
Check the connection
of HDMI cable?
Input a HDMI cable.
Yes
Does the digital data appear at
HDMI1 (R6100 ~ R6107)
HDMI2 (R6108 ~ R6115)?
Check IC604.
Change a main PCB ass'y.
Yes
Does the digital data
appear at RA (618 ~ 623)?
Yes
Power Indicator is off.
Lamp on, no video.
No
No
2
Yes
Check a LVDS cable?
Replace a lcd panel?
Please, Call to Samsung Co. LTD.
No
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