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Panasonic 2007
L.C.D. models TV service guide
1
Today's seminar's contents are
1. Review and Chassis Structure
2. Signal Circuit
3. Trouble Shooting
4. Power Supply circuit
5. Protection circuit
6. Service information
2
1.Review and Chassis Structure
3
2007 LCD Feature Comparison Review
LXD/LX700 LXD/LX70 LMD70 Series LM70 Series LXD/LED7 LE7 Series
Series Series Series
Size 32 32/26 32/26/20 32/26 32/26 32/26
Panel IPS IPS IPS VA IPS VA
Motion Picture Pro Y Y - - - -
Picture
Intelligent Scene
Y Y Y - Y -
Controller
Advanced 3D
Colour Y Y Y - Y -
Management
Sub-Pixel
Y Y Y - Y -
Controller
Advanced Smart
Speaker Bottom Speaker Bottom Speaker Bottom Speaker Bottom Speaker Bottom Speaker
Sound Speaker (Side)
Cone
Sound
Bamboo fibre - - - - -
Material
SRS TruSurroun Y - - - - -
XT
HDMI 3 2 2 2 1 1
Networking
VIERA Link Y (HDAVI Control 2) Y (HDAVI Control 2) Y (HDAVI Control 2) Y (HDAVI Control 1) Y (HDAVI Control 1) Y (HDAVI Control 1)
SD Card Slot Y (HD-JPEG) - - - - -
PC Input Y Y Y - - -
4
2007 LCD Line-up
2006 2007
TX-32LXD600
TX-32LXD600
High End Model TX-32LXD700
TX-32LXD700 S-3
High End Model
TX-26LXD600
TX-26LXD600
TX-32LXD60
TX-32LXD60 TX-32LXD70
TX-32LXD70 S-2
TX-26LXD60
TX-26LXD60 TX-26LXD70
TX-26LXD70 S-2
TX-23LXD60
TX-23LXD60
Step Up Model
Step Up Model TX-32LMD70
TX-32LMD70 S-3
TX-26LMD70
TX-26LMD70 S-3
TX-32LXD6
TX-32LXD6 TX-32LXD7
TX-32LXD7 S-3
Leader Model
Leader Model
TX-26LXD6
TX-26LXD6 TX-26LXD7
TX-26LXD7 S-3
5
2007 LCD Line-up
2006 2007
IDTV Model
TX-32LX600F
TX-32LX600F TX-32LX700F
TX-32LX700F S-5
High End Model
High End Model TX-32LXD700F S-5
TX-26LX600F
TX-26LX600F TX-32LXD700F
TX-32LX60F
TX-32LX60F
TX-32LXD70F S-2
TX-32LXD70F
TX-32LX70F
TX-32LX70F S-2
TX-26LX60F
TX-26LX60F TX-26LXD70F S-2
TX-26LXD70F
TX-26LX70F
TX-26LX70F S-2
TX-23LX60F
TX-23LX60F
TX-32LXD71F S-2
TX-32LXD71F
Step Up Model
Step Up Model TX-26LXD71F S-2
TX-26LXD71F
TX-32LM70F
TX-32LM70F S-2
TX-32LMD70F S-3
TX-32LMD70F
TX-26LM70F
TX-26LM70F S-2
TX-26LMD70F S-3
TX-26LMD70F
TX-32LX6F
TX-32LX6F TX-32LE7F
TX-32LE7F S-3 TX-32LED7F
TX-32LED7F S-3
TX-26LX6F
TX-26LX6F TX-26LE7F
TX-26LE7F S-3
TX-26LED7F
TX-26LED7F S-3
Leader Model
Leader Model S-3
TX-32LE7F/S
TX-32LE7F/S
TX-26LE7F/S
TX-26LE7F/S S-3
TX-20LA70F
TX-20LA70F
4:3 Model
4:3 Model
S-5
6
2007 LCD Line-up
2006 2007
TX-32LX600P
TX-32LX600P TX-32LX700P S-5
TX-32LX700P
High End Model
High End Model
TX-26LX600P
TX-26LX600P
TX-32LX70P
TX-32LX70P S-2
TX-32LX60P
TX-32LX60P TX-26LX70P
TX-26LX70P S-2
TX-26LX60P
TX-26LX60P Step Up Model
Step Up Model
TX-32LM70P
TX-32LM70P S-2
TX-23LX60P
TX-23LX60P
TX-26LM70P
TX-26LM70P S-2
TX-32LX6P
TX-32LX6P TX-32LE7P
TX-32LE7P S-3
Leader Model
Leader Model
TX-26LX6P
TX-26LX6P TX-26LE7P
TX-26LE7P S-3
TX-20LA70P
TX-20LA70P S-5
4:3 Model
4:3 Model
TX-20LA7P
TX-20LA7P S-?
7
New LCD V-REAL Panel
Review
IPS Alpha LCD Panel
The IPS Alpha LCD panel offers a
wider viewing angle than an ordinary
VA-system LCD so colours in the
Wide viewing angle
displayed picture appear beautiful
even when viewed from an angle.
The LX700's IPS Alpha LCD panel
provides a viewing angle of 178 178
degrees.
Faster speed by LCD substances
Better viewer angle by LCD structure
Better TM by clear and thin electrode
IPS IPS Conventional
Virtually no change in colour Picture appears whitish
IPS- LCD Panel Suitable for Viewing in Living Rooms
8
Appendix
Appendix LCD Operation in General
View Angle
Response Speed
Operation
New LCD V-REAL Driver 1
FOR PAL Review
Motion Picture Pro
y
log
hno
Tec
New
Conventional LCD TV
50 frames/sec 20 msec (holding time) New interpolation frames are created based on two
adjacent frames and inserted between them.
Frame Creation
Frame Creation
Conventional system
50 frames / 1 sec
Interpolation images created
100 frames/sec Smoother
between frames based on Frame Creation
expression
10 msec motion vector detection 100 frames / 1 sec
of motion
(holding time) technology
Dramatic Reduction of
Afterimages to Achieve
Clear Motion Images!
Image with a Motion
conventional
system Picture Pro
Motion Picture Pro for a 50% Reduction in Afterimages (Holding Time)!
10
New LCD V-REAL Driver 2
Review
Intelligent Scene Controller
Backlight Light intensity of the
backlight remains
consistent regardless
Ordinary of scenes.
LCD TV
White cast over blacks
Consistent light intensity
's Advantages
gy (1)
olo Backlight turned down in
Techn
Scene- intensity for dark scenes
adaptive
backligh
t control Reduction of light intensity Tighter blacks!
0.14 times max.
y (2)
log Control of gradation according
hno Bright scene White Dark scene White
Tec to types of scene
Scene- Max. 4x
Steps of Gradation
adaptive
More detailed expression
contrast
Max. 4x
gamma Increase of gradation Increased gradation Steps of Gradation Even the slightest differences in
blackness are expressed clearly.
correction steps for bright areas Black steps for dark areas Black
Blacker Blacks! No White Cast in Dark Scenes and Sharper, Crisper Pictures!
11
VIERA Link Review
Now you can enjoy the beautiful sounds and pictures of high-
quality AV equipment without all the messy, unsightly cables.
Achieve the Seamless Operation!
With HDMI, a single cable* carries the video, audio and control
signals between two digital components. By using VIERA Link
(= HDAVI-Control) compatible components, you can turn on the
power for your entire home theater with a single remote control
button, and begin playback immediately. Operating your DIGA
recorder is easier and smarter too. You can use the same
remote controller you use with your home theatre. When you
select Play on the DIGA recorder, VIERA's video input
automatically switches itself for DIGA playback.
VIERA
DIGA Receiver
* Depending on the cable used, this function may not be
possible.
Panasonic HDMI cables are highly recommended.
Easy Control of All Operations by using Only TV Remote Control !
12
SD Card Slot (For Displaying Photos and Moving Picture Review
Taken by a Digital Still Camera or HD Video Camera)
Shooting Viewing
[Photos and Moving
Picture]
Insert the SD Memory Card
into VIERA and view the
photos and moving picture
on the large screen.
LUMIX's* HDTV mode
LUMIX's* HDTV mode
displays full-screen photos
displays full-screen photos
and moving picture on the
and moving picture on the
wide-screen TV.
wide-screen TV.
Beautiful, AVCHD-standard
Beautiful, AVCHD-standard
Shooting with LUMIX motion images** can be
motion images** can be
or HD Video Camera viewed on a large screen.
viewed on a large screen.
AVCHD is a standard developed jointly by Sony and Panasonic
for HD digital video cameras. Using highly efficient codec
technologies, it records 1080i high-definition signals onto media
such as 8-cm DVD discs and SD/SDHC Memory Cards. AVCHD
allows an HD video camera to make long-time recordings of
high-density video information onto a DVD disc or SD/SDHC
Take out the SD Insert the SD Memory Card Display photos on the Memory Card.
Memory Card. directly into VIERA. large screen.
Vertical position detection function
Conventional New VIERA
* Compatible with the DMC-
FX7, FX2, FZ2, FZ3, FZ25,
SDHC Compatible! LC70, LC1, LZ2, and LS1.
** Compatible with
PZ/PY700 Series only.
Viewing High-resolution Photos and AVCHD-standard Motion Images Shot
with a Digital Still Camera or HD Video Camera on a Large Screen!
13 SD Card Slot : PZ/PY700 series, PX/PV700 Series and LXD/LX700 Series only.
1-(1) Chassis structure Board layout
32LXD600/LX600
32LXD600/LX600 32LXD700/LX700
32LXD700/LX700
KEY Control
K
P
P
AP
DG (HDMI) AP
SP XV SP
SP H DG SP
H
G (HDMI)
GS V SP
(HDMI)
SP
SP G SP K GH GS V
32/26LXD600 only
Differences from LXD600/LX600:
1. XV board is combined to DG board.
2. GH board for front HDMI is added.
3. KEY Control is added on the top.
4. Position of DG, P, GS, K, G and AP board are changed.
14
1-(2) Chassis structure Board layout
32LXD60/LX60
32LXD60/LX60 32LXD70/LX70
32LXD70/LX70
KEY Control KEY Control
K K
P
AP AP
A (HDMI) H
XV
P DG
H B
G
(HDMI)
SP SP SP SP
V V
LXD60 only
Differences from LXD60/LX60:
1. XV board is combined to DG board.
2. The function of A board is separated to DG and H boards.
3. AV3 terminal is changed from H board to G board.
15
1-(3) Chassis structure Function
32LXD600/LX600
32LXD600/LX600 32LXD700/LX700
32LXD700/LX700
XV DG DG
DVB Tuner LVDS TX DVB Tuner
GC5
Peaks Lite HQ1L LVDS TX
GC3FS
Peaks Lite2
HDMI x2
(CEC)
HDMI x2
(CEC)
LXD600 only LXD700 only
Differences from LXD600/LX600:
1. The function of XV board is combined to DG board.
2. Peaks Lite on XV board and GC5 and GC3FS on DG board are changed
to Peaks Lite2 on DG board.
3. HQ1L on DG board is newly introduced.
16
1-(4) Chassis structure Function
32LXD60/LX60
32LXD60/LX60 32LXD70/LX70
32LXD70/LX70
A H DG
XV Audio RGB DVB Tuner
SWITCH SWITCH
DVB Tuner AUDIO HQ1L LVDS TX
PROCESSOR
Audio VIDEO
Processor SWITCH AD Converter
AUDIO
SWITCH
VCTP Peaks Lite2
LVDS TX VIDEO HDMI x2
HDMI x2 SWITCH (CEC)
(CEC)
LXD60 only LXD70 only
Differences from LX60/LXD60:
1. The function of A board is separated to DG board and H board.
2. For LXD60 series, XV board is combined to DG board.
3. For LXD60/LX60 series, VCTP is changed to Peaks Lite2 and
AD Converter as shown in yellow color.
4. HQ1L is newly introduced as shown in pink color.
17
1-(5) Chassis structure
Board Function 32LXD700/LX700 32/26LXD70/LX70
P Main Input, Power Supply Yes Yes
AP Power Supply Regulator Yes Yes
DG Peaks Lite2, HDMI, IDTV Processor (*1) Yes (*1) Yes (*1)
H AV Connector, Tuner, AV Switch Yes Yes
K Main Switch Yes Yes
G Side AV Terminal Yes Yes
Control Panel
Control Button None serviceable (*2) Yes Yes
Assy
V LED IR, Remote Receiver Yes Yes
GS SD Card slot Yes -
GH HDMI (Front) Yes -
* 1 LXD700 and LXD70 have the Digital Tuner on DG board.
* 2 Control Panel Assy should be exchanged for service.
18
Today's seminar's contents are
1. Review and Chassis Structure
2. Signal Circuit
3. Trouble Shooting
4. Power Supply circuit
5. Protection circuit
6. Service information
19
2.Signal circuit
20
2.Signal Circuit
1) Signal Circuit Over view
2) Video Signal Circuit
3) Audio Signal Circuit
21
2-1.(1) Signal circuit Over view Review
Input
Input Signal
Signal Panel
Panel
Source
Source Processor
Processor Drive
Drive
Video
Brightness Video Picture
TV tuner Video Contrast Signal
AV terminal
Signal Sharpness
SD card etc
PC input Audio Audio
Signal Speaker
Bass
Treble Audio
Balance
Signal Sound
Volume
22
2-1.(2) Signal circuit Over view
Input Source Signal Processor Panel Drive
GH
K V
HDMI
Digital Only LXD
Tuner
LCD panel
Analogue
H DG
Tuner Specification is defined
AV input by each panel supplier
Comp.
PC
GS
SPEAKER
DG: Digital Signal
H : AV Terminal / AV Switch / Processor
Audio switch audio processor / HDMI Interface
K : Key Switch GS: SD card
V : Remote Receiver / Power LED GH: HDMI
23
2-2.(1) Video Signal Flow
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H LVDS LVDS
TU3200 IC3001 HQ1L
TX LCD
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
24
2-2.(2) Video Signal Flow Analogue Tuner
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H LVDS LVDS
TU3200 IC3001 HQ1L
TX LCD
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
25
2-2.(3) Video Signal Flow Analogue Input
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H LVDS LVDS
TU3200 IC3001 HQ1L
TX LCD
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
26
2-2.(4) Video Signal Flow Digital Tuner
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H LVDS LVDS
TU3200 IC3001 HQ1L
TX LCD
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
27
2-2.(5) Video Signal Flow HDMI Input
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H LVDS LVDS
TU3200 IC3001 HQ1L
TX LCD
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
28
2-2.(6) Video Signal Flow SD Card
DG IC4503 GH
HDMI1
HDMI SW HDMI3 Analog
HDMI2 TU8301
Digital
DIG.TUNER DEMODULATOR
IC8301 IC4200 IC4207
H TU3200 LVDS LVDS
IC3001 HQ1L LCD
TX
TUNER Panel
AV1
IC8001
AV2 VIDEO Peaks Lite2
SWITCH IC4510
YPBPR A/D SCALING/
Converter IP CONVERTER/ GS SD
PC and PICTURE CORRECT/
IC1100
HDMI-RX OSD
STB
MCU
LXD700/LX700
Only
G AV3
LXD700/LXD70
Only
29
2-3.(1) Audio Signal Flow Analogue Tuner
IC4503 GH Analog
DG HDMI1
HDMI3 Digital
HDMI SW
HDMI2
LCD
TU8301 DIG.TUNER DEMODULATOR
IC8301 Panel
IC4200 IC4207
H TU3200 GS
HQ1L LVDS TX
TUNER IC3101
IC2002
IC4510
AV1 AUDIO
IC8001
DAC
AV2 PeaksLite2
AUDIO A/D
SWITCH
IC2106 Converter
AUDIO IN
and
AUDIO HDMI-RX DIGITAL AUDIO
PROCESSOR
IC2011 PROCESS IC1100
AUDIO AUDIO
OUT AMP
IC2302 IC2301 STB
MCU
IC2012 AUDIO AUDIO
HP AMP AMP AMP LXD700/
LX700 Only
G AV3 LXD700/
LXD70 Only
HP
30
2-3.(2) Audio Signal Flow Analogue Input
IC4503 GH Analog
DG HDMI1
HDMI3 Digital
HDMI SW
HDMI2
LCD
TU8301 DIG.TUNER DEMODULATOR
IC8301 Panel
IC4200 IC4207
H TU3200 GS
HQ1L LVDS TX
TUNER IC3101
IC2002
IC4510
AV1 AUDIO
IC8001
DAC
AV2 PeaksLite2
AUDIO A/D
SWITCH
IC2106 Converter
AUDIO IN
and
AUDIO HDMI-RX DIGITAL AUDIO
PROCESSOR
IC2011 PROCESS IC1100
AUDIO AUDIO
OUT AMP
IC2302 IC2301 STB
MCU
IC2012 AUDIO AUDIO
HP AMP AMP AMP LXD700/
LX700 Only
G AV3 LXD700/
LXD70 Only
HP
31
2-3.(3) Audio Signal Flow Digital Tuner
IC4503 GH Analog
DG HDMI1
HDMI3 Digital
HDMI SW
HDMI2
LCD
TU8301 DIG.TUNER DEMODULATOR
IC8301 Panel
IC4200 IC4207
H TU3200 GS
HQ1L LVDS TX
TUNER IC3101
IC2002
IC4510
AV1 AUDIO
IC8001
DAC
AV2 PeaksLite2
AUDIO A/D
SWITCH
IC2106 Converter
AUDIO IN
and
AUDIO HDMI-RX DIGITAL AUDIO
PROCESSOR
IC2011 PROCESS IC1100
AUDIO AUDIO
OUT AMP
IC2302 IC2301 STB
MCU
IC2012 AUDIO AUDIO
HP AMP AMP AMP LXD700/
LX700 Only
G AV3 LXD700/
LXD70 Only
HP
32
2-3.(4) Audio Signal Flow HDMI
IC4503 GH Analog
DG HDMI1
HDMI3 Digital
HDMI SW
HDMI2
LCD
TU8301 DIG.TUNER DEMODULATOR
IC8301 Panel
IC4200 IC4207
H TU3200 GS
HQ1L LVDS TX
TUNER IC3101
IC2002
IC4510
AV1 AUDIO
IC8001
DAC
AV2 PeaksLite2
AUDIO A/D
SWITCH
IC2106 Converter
AUDIO IN
and
AUDIO HDMI-RX DIGITAL AUDIO
PROCESSOR
IC2011 PROCESS IC1100
AUDIO AUDIO
OUT AMP
IC2302 IC2301 STB
MCU
IC2012 AUDIO AUDIO
HP AMP AMP AMP LXD700/
LX700 Only
G AV3 LXD700/
LXD70 Only
HP
33
Today's seminar's contents are
1. Review and Chassis Structure
2. Signal Circuit
3. Trouble Shooting
4. Power Supply circuit
5. Protection circuit
6. Service information
34
3.Troubleshooting
35
3.Troubleshooting
1Some part of screen
2All over screen
3No Picture
4Actual market trouble
36
3.Troubleshooting for Picture Trouble
Trouble (1)Some part of screen
Where is
abnormal picture Upper
displayed ? Panel
Upper or Lower
Lower
Panel
Right
Panel
Left or Right
Left
Panel
Vertical or Horizontal line
Panel
(2)All over screen
Many vertical line Abnormal color OSD trouble
All over screen
DG Board
Non-uniformity color
Panel
(3)No picture
37
3-1.(1) Picture trouble for some part of screen
Input Source Signal Processor Panel REVIEW
GH
K V
HDMI
Digital
Tuner
Analogue
Tuner DG LCD Panel
AV input
Comp.
H
PC
GS
DG: Digital Signal
Processor
SPEAKER / HDMI Interface
GS : SD card
GH : HDMI Front
H : AV Terminal / AV Switch /
K : Key Switch D : Format Converter
V : Remote Receiver / Power LED / Plasma AI Processor
/ Sub-Field Processor
38
3-1.(2) Picture trouble for some part of screen
Enlarged view of LCD
RGB Filter
Liquid Crystal
Back Light
39
3-1.(3) Picture trouble for some part of screen
40
3-1.(4) Picture trouble for some part of screen
Upper half or Lower half trouble
Symptom Lower half picture trouble
No Picture, Picture noise, Full Horizontal line, etc. Result LCD panel defect
All model
(Front view)
1
DG H
2
LCD panel
1 LCD panel
41
3-1.(5) Picture trouble for some part of screen
Left half or Right half trouble
Symptom Right half picture trouble
No Picture, Picture noise, Full Horizontal line, etc. Result LCD panel defect
All model
(Front view)
2 1 DG H
LCD panel
1 LCD panel
42
3-1.(6) Picture trouble for some part of screen
Horizontal line
Symptom Horizontal line
Result LCD panel defect
All model
(Front view)
DG H
LCD panel
1 LCD panel
43
3-1.(7) Picture trouble for some part of screen
Vertical line
Symptom Thin and vertical l line
Result LCD panel defect
All model
(Front view)
DG H
LCD panel
1 LCD panel
44
3-1.(8) Picture trouble for some part of screen
Vertical line noise
Symptom Vertical noise
Result DG board defect
Or LCD panel)
All model
(Front view)
DG H
LCD panel
1 DG board defect
45
3-1.(9) Picture trouble for some part of screen
Sub picture NG
Symptom Sub picture NG
Result DG board defect
All model
(Front view)
DG H
LCD panel
1 DG board defect
46
3-2.(1) Picture trouble for all over screen
Non uniformity color
Symptom Irregular color
Result LCD panel defect
All model
(Front view)
DG H
LCD panel
1 LCD panel
47
3-2.(2) Picture trouble for all over screen
Vertical line line
Symptom Vertical line all screen
Result DG board defect
(Or panel)
All model
(Front view)
DG H
LCD panel
1 DG board defect
48
3-2.(3) Picture trouble for all over screen
O.S.D. trouble
Symptom OSD trouble
Result DG board defect
All model
(Front view)
DG H
LCD panel
1 DG board defect
49
3-2.(4) Picture trouble for all over screen
Abnormal color
Symptom Abnormal color
Result DG board defect
All model
(Front view)
DG H
LCD panel
1 DG board defect
50
3-3.No picture
No Picture with normal sound
Symptom No picture
Result DG board defect
H board defect
All ALL Input Source No Only AV Terminal
Picture NG ? H Board
Picture NG
(Front view) Yes
Analog TV AV Terminal
No
H Board
Picture NG Picture OK?
Yes
Tuner (H Board)
DG H Only Digital
DG Board
TV Picture NG
Only HDMI
LCD panel Tuner
Input Picture NG
DG Board
No
No picture but
LCD Panel or DG board
OSD is displayed ?
Yes
DG Board
51
Today's seminar's contents are
1. Review and Chassis Structure
2. Signal Circuit
3. Trouble Shooting
4. Power Supply circuit
5. Protection circuit
6. Service information
52
4.Power supply Circuit
53
4.Power Supply Circuit
1) Power Circuit Over view
2) Power supply sequence
3) Power Distribution
54
4-1.(1) Power circuit Overview
AP board
AC Plug
Relay STB 5V
DTV 9V
Regulator HQ 3.3V
24V
Sound 15V
Main 15V
Inverter Panel 12V
55
4-1.(2) Power circuit Overview
AC Plug in Power SW
STB 5V
P K
Standby
Trans
AP H DG
STB 5V
Relay ON SUB ON
Panel STB ON
Relay TV main ON
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