Page 1
Panasonic 2007
Panasonic 2007
L.C.D.
L.C.D.
models TV service guide
models TV service guide
1
Page 2
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
Page 3
1.Review and Chassis Structure
3
Page 4
2007 LCD Feature Comparison
Review
Motion Picture Pro
Intelligent Scene
Controller
Picture
Advanced 3D
Colour
Management
Sub-Pixel
Controller
Speaker
Cone
Material
SoundNetworking
SRS TruSurrounｄ
XT
LXD/LX700
Series
Advanced Smart
Sound Speaker (Side)
Series
LM70 Series
32/26
VA
-
-
-
-
Bottom Speaker
-
LXD/LED7
Series
32/26
IPS
-
Y
Y
Y
Bottom Speaker
-
LE7 SeriesLMD70 SeriesLXD/LX70
32/2632/26/2032/2632Size
VA IPS IPS αIPS αPanel
--YY
-YYY
-Y YY
-YYY
Bottom SpeakerBottom SpeakerBottom Speaker
-----Bamboo fibre
---Y
HDMI
VIERA Link
SD Card Slot
3
Y (HDAVI Control 2)Y (HDAVI Control 2)
Y (HDAVI Control 2)
4
Y (HDAVI Control 1)
2
Y (HDAVI Control 1)
-
-
1
Y (HDAVI Control 1)
-
-
122
---Y (HD-JPEG)
-YYYPC Input
Page 5
2007 LCD Line-up <UK>
2006
TX-32LXD600
TX-32LXD600
TX-26LXD600
TX-26LXD600
TX-32LXD60
TX-32LXD60
TX-26LXD60
TX-26LXD60
TX-23LXD60
TX-23LXD60
High End Model
High End Model
Step Up Model
Step Up Model
2007
TX-32LXD700
TX-32LXD700
TX-32LXD70
TX-32LXD70
TX-26LXD70
TX-26LXD70
TX-32LMD70
TX-32LMD70
TX-26LMD70
TX-26LMD70
S-3
S-2
S-2
S-3
S-3
TX-32LXD6
TX-32LXD6
TX-26LXD6
TX-26LXD6
Leader Model
Leader Model
5
TX-32LXD7
TX-32LXD7
TX-26LXD7
TX-26LXD7
S-3
S-3
Page 6
2007 LCD Line-up <Continental Europe>
2006
TX-32LX600F
TX-32LX600F
TX-26LX600F
TX-26LX600F
TX-32LX60F
TX-32LX60F
TX-26LX60F
TX-26LX60F
TX-23LX60F
TX-23LX60F
High End Model
High End Model
Step Up Model
Step Up Model
TX-32LX700F
TX-32LX700F
TX-32LX70F
TX-32LX70F
TX-26LX70F
TX-26LX70F
TX-32LM70F
TX-32LM70F
TX-26LM70F
TX-26LM70F
S-5
S-2
S-2
S-2
S-2
2007
IDTV Model
TX-32LXD700F
TX-32LXD700F
TX-32LXD70F
TX-32LXD70F
TX-26LXD70F
TX-26LXD70F
TX-32LXD71F
TX-32LXD71F
TX-26LXD71F
TX-26LXD71F
TX-32LMD70F
TX-32LMD70F
TX-26LMD70F
TX-26LMD70F
S-5
S-2
S-2
S-2
S-2
S-3
S-3
TX-32LX6F
TX-32LX6F
TX-26LX6F
TX-26LX6F
Leader Model
Leader Model
4:3 Model
4:3 Model
TX-32LE7F
TX-32LE7F
TX-26LE7F
TX-26LE7F
TX-32LE7F/S
TX-32LE7F/S
TX-26LE7F/S
TX-26LE7F/S
TX-20LA70F
TX-20LA70F
6
S-3
S-3
S-3
S-3
S-5
TX-32LED7F
TX-32LED7F
TX-26LED7F
TX-26LED7F
S-3
S-3
Page 7
2007 LCD Line-up <Eastern Europe>
2006 2007
TX-32LX600P
TX-32LX600P
High End Model
TX-26LX600P
TX-26LX600P
High End Model
TX-32LX700P
TX-32LX700P
S-5
TX-32LX60P
TX-32LX60P
TX-26LX60P
TX-26LX60P
TX-23LX60P
TX-23LX60P
TX-32LX6P
TX-32LX6P
TX-26LX6P
TX-26LX6P
Step Up Model
Step Up Model
Leader Model
Leader Model
4:3 Model
4:3 Model
TX-32LX70P
TX-32LX70P
TX-26LX70P
TX-26LX70P
TX-32LM70P
TX-32LM70P
TX-26LM70P
TX-26LM70P
TX-32LE7P
TX-32LE7P
TX-26LE7P
TX-26LE7P
TX-20LA70P
TX-20LA70P
TX-20LA7P
TX-20LA7P
S-2
S-2
S-2
S-2
S-3
S-3
S-5
S-?
7
Page 8
The IPS Alpha LCD panel offers a
wider viewing angle than an ordinary
VA-system LCD so colours in the
displayed picture appear beautiful
even when viewed from an angle.
The LX700's
provides a viewing angle of 178
degrees.
IPS Alpha LCD panel
New LCD V-REAL Panel
New LCD V-REAL Panel
IPS Alpha LCD Panel
IPS Alpha LCD Panel
178゜
・Faster speed by LCD substances
・Better viewer angle by LCD structure
・Better TM by clear and thin electrode
Review
Wide viewing angle
IPSα
Virtually no change in colour Picture appears whitish
IPS- LCD Panel Suitable for Viewing in Living Rooms
IPS- LCD Panel Suitable for Viewing in Living Rooms
IPS Conventional
8
Page 9
Appendix
Appendix
View Angle
Response Speed
Operation
LCD Operation in General
LCD Operation in General
Page 10
FOR PAL
y
g
o
l
o
n
h
c
e
T
w
e
N
50 frames/sec
Conventional LCD TV
20 msec (holding time)
Frame Creation
New LCD V-REAL Driver 1
New LCD V-REAL Driver 1
Motion Picture Pro
Motion Picture Pro
New interpolation frames are created based on two
adjacent frames and inserted between them.
Frame Creation
Conventional system
50 frames / 1 sec
Review
100 frames/sec
10 msec
(holding time)
Interpolation images created
between frames based on
motion vector detection
technology
Dramatic Reduction of
Afterimages to Achieve
Clear Motion Images!
Image with a
conventional
system
Motion Picture Pro for a 50% Reduction in Afterimages (Holding Time)!
Motion Picture Pro for a 50% Reduction in Afterimages (Holding Time)!
Smoother
expression
of motion
Frame Creation
100 frames / 1 sec
Motion
Picture Pro
10
Page 11
New LCD V-REAL Driver 2
New LCD V-REAL Driver 2
Intelligent Scene Controller
Intelligent Scene Controller
Review
Ordinary
LCD TV
o
l
o
n
h
c
e
T
Sceneadaptive
backligh
t control
o
l
o
n
h
c
e
T
Scene-
adaptive
contrast
gamma
correction
Backlight
Light intensity of the
backlight remains
consistent regardless
of scenes.
White cast over blacks
Consistent light intensity
's Advantages
)
1
(
y
g
Reduction of light intensity
)
2
(
y
g
Bright scene
Increase of gradation
steps for bright areas
White
Max. 4x
Steps of Gradation
Black
Dark scene
Increased gradation
steps for dark areas
0.14 times max.
White
Max. 4x
Steps of Gradation
Black
Backlight turned down in
intensity for dark scenes
Tighter blacks!
Control of gradation according
to types of scene
More detailed expression
Even the slightest differences in
blackness are expressed clearly.
Blacker Blacks! No White Cast in Dark Scenes and Sharper, Crisper Pictures!
Blacker Blacks! No White Cast in Dark Scenes and Sharper, Crisper Pictures!
11
Page 12
VIERA Link
VIERA Link
Review
Now you can enjoy the beautiful sounds and pictures of highquality AV equipment without all the messy, unsightly cables.
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
Achieve the Seamless Operation!
* 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 !
Easy Control of All Operations by using Only TV Remote Control !
12
Page 13
SD Card Slot (For Displaying Photos and Moving Picture
SD Card Slot (For Displaying Photos and Moving Picture
Taken by a Digital Still Camera or HD Video Camera)
Taken by a Digital Still Camera or HD Video Camera)
Shooting Viewing
Shooting with LUMIX
or HD Video Camera
Review
[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
motion images** can be
motion images** can be
viewed on a large screen.
viewed on a large screen.
Take out the SD
Memory Card.
Viewing High-resolution Photos and AVCHD-standard Motion Images Shot
Viewing High-resolution Photos and AVCHD-standard Motion Images Shot
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
Insert the SD Memory Card
directly into VIERA.
Display photos on the
large screen.
Memory Card.
Vertical position detection function
Conventional
* Compatible with the DMCFX7, FX2, FZ2, FZ3, FZ25,
SDHC Compatible!
with a Digital Still Camera or HD Video Camera on a Large Screen!
with a Digital Still Camera or HD Video Camera on a Large Screen!
13
LC70, LC1, LZ2, and LS1.
** Compatible with
PZ/PY700 Series only.
SD Card Slot : PZ/PY700 series, PX/PV700 Series and LXD/LX700 Series only.
New VIERA
New VIERA
Page 14
(1)
11--(1)
Chassis structure
Chassis structure
Board layout
32LXD600/LX600
32LXD600/LX600
P
DG
SP
(HDMI)
XV
H
SP
GS
G
32/26LXD600 only
AP
SP
V
SP
K
32LXD700/LX700
32LXD700/LX700
KEY Control
K
AP
SP
G
SP SP
H
(HDMI)
GH
DG
(HDMI)
GS
P
SP
V
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
Page 15
(2)
11--(2)
Chassis structure
Chassis structure
Board layout
32LXD60/LX60
32LXD60/LX60
KEY Control
AP
(HDMI)
A
XV
H
SP
B
LXD60 only
K
P
SP
V
32LXD70/LX70
32LXD70/LX70
KEY Control
K
AP
H
DG
G
(HDMI)
SP SP
P
V
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
Page 16
1--
1
(3)
(3)
Chassis structure
Chassis structure
Function
32LXD600/LX600
32LXD600/LX600
XV
DVB Tuner
Peaks Lite
DG
GC5
GC3FS
LVDS TX
HDMI x2
(CEC)
LXD600 only
32LXD700/LX700
32LXD700/LX700
DG
DVB Tuner
HQ1L
Peaks Lite2
LVDS TX
HDMI x2
(CEC)
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
Page 17
1--
1
(4)
(4)
Chassis structure
Chassis structure
Function
32LXD60/LX60
32LXD60/LX60
XV
DVB Tuner
A
Audio
Processor
LVDS TX
Audio
SWITCH
VCTP
RGB
SWITCH
VIDEO
SWITCH
HDMI x2
(CEC)
LXD60 only
32LXD70/LX70
32LXD70/LX70
H
AUDIO
PROCESSOR
AUDIO
SWITCH
VIDEO
SWITCH
DG
HQ1L
AD Converter
Peaks Lite2
DVB Tuner
LVDS TX
HDMI x2
(CEC)
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
Page 18
1--
1
(5)
(5)
Chassis structure
Chassis structure
32/26LXD70/LX7032LXD700/LX700FunctionBoard
YesYesMain Input, Power SupplyP
AP
G Side AV Terminal
Control Panel
Assy
V
GS
Power Supply Regulator
LED IR, Remote Receiver Yes
SD Card slot
Yes
YesYes
Yes (*1)Yes (*1)Peaks Lite2, HDMI, IDTV Processor (*1)DG
YesYesAV Connector, Tuner, AV SwitchH
YesYesMain SwitchK
YesYes
YesYesControl Button None serviceable (*2)
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
-
Page 19
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
Page 20
2.Signal circuit
20
Page 21
2.Signal Circuit
1) Signal Circuit Over view
2) Video Signal Circuit
3) Audio Signal Circuit
21
Page 22
22--11..(1) Signal circuit Over view
(1) Signal circuit Over view
Review
Input
Input
Source
Source
TV tuner
AV terminal
SD card
PC input
Video
Video
Signal
Signal
Audio
Audio
Signal
Signal
Signal
Signal
Processor
Processor
Video
Brightness
Contrast
Sharpness
etc
Audio
Bass
Treble
Balance
Video
Video
Signal
Signal
Audio
Audio
Signal
Signal
Panel
Panel
Drive
Drive
Picture
Speaker
Sound
Volume
22
Page 23
22--11..(2) Signal circuit Over view
(2) Signal circuit Over view
K
Input Source
V
Digital
Tuner
Analogue
Tuner
AV input
Comp.
PC
Only LXD
H
Signal Processor
GH
HDMI
DG
GS
Panel Drive
LCD panel
Specification is defined
by each panel supplier
SPEAKER
H : AV Terminal / AV Switch /
Audio switch audio processor
K : Key Switch
V : Remote Receiver / Power LED
DG: Digital Signal
Processor
/ HDMI Interface
GS: SD card
GH: HDMI
23
Page 24
2.((11) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
24
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 25
2.((22) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
Analogue Tuner
Analogue Tuner
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
25
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 26
2.((33) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
Analogue
Analogue
Input
Input
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
26
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 27
2.((44) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
Digital Tuner
Digital Tuner
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
27
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 28
2.((55) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
HDMI Input
HDMI Input
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
28
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 29
2.((66) )
22--2.
Video
Video
Signal
Signal
Flow
Flow
SD Card
SD Card
DG
H
TU3200
TUNER
AV1
AV2
YPBPR
PC
HDMI1
HDMI2
DIG.TUNER
TU8301
SWITCH
IC3001
VIDEO
IC4503
HDMI SW
DEMODULATOR
IC8301
IC4510
A/D
Converter
and
IC4200
HQ1L
IC8001
Peaks Lite2
SCALING/
IP CONVERTER/
PICTURE CORRECT/
GH
HDMI3
IC4207
LVDS
TX
LVDS
IC1100
Analog
Digital
LCD
Panel
GS
SD
G AV3
HDMI-RX
29
OSD
STB
MCU
LXD700/LX700
Only
LXD700/LXD70
Only
Page 30
3.((11) )
22--3.
Audio
Audio
Signal
Signal
Flow
Flow
Analogue Tuner
Analogue Tuner
DG
TU8301
H
TU3200
TUNER
AV1
AV2
AUDIO IN
AUDIO
OUT
HDMI1
HDMI2
DIG.TUNER
IC2011
AUDIO
AMP
IC3101
AUDIO
SWITCH
IC2302
IC2012
HP AMP
IC4503
DEMODULATOR
IC2002
AUDIO
DAC
IC2106
AUDIO
PROCESSOR
AUDIO
AMP
HDMI SW
IC2301
AUDIO
AMP
IC8301
IC4510
A/D
Converter
and
HDMI-RX
IC4200
HQ1L
IC8001
PeaksLite2
DIGITAL AUDIO
PROCESS
GH
HDMI3
IC4207
LVDS TX
Analog
Digital
LCD
Panel
GS
IC1100
STB
MCU
LXD700/
G AV3
HP
LX700 Only
LXD700/
LXD70 Only
30
Page 31
3.((22) )
22--3.
Audio
Audio
Signal
Signal
Flow
Flow
Analogue Input
Analogue Input
DG
TU8301
H
TU3200
TUNER
AV1
AV2
AUDIO IN
AUDIO
OUT
HDMI1
HDMI2
DIG.TUNER
IC2011
AUDIO
AMP
IC3101
AUDIO
SWITCH
IC2302
IC2012
HP AMP
IC4503
DEMODULATOR
IC2002
AUDIO
DAC
IC2106
AUDIO
PROCESSOR
AUDIO
AMP
HDMI SW
IC2301
AUDIO
AMP
IC8301
IC4510
A/D
Converter
and
HDMI-RX
IC4200
HQ1L
IC8001
PeaksLite2
DIGITAL AUDIO
PROCESS
GH
HDMI3
IC4207
LVDS TX
Analog
Digital
LCD
Panel
GS
IC1100
STB
MCU
LXD700/
G AV3
HP
LX700 Only
LXD700/
LXD70 Only
31
Page 32
3.((33) )
22--3.
Audio
Audio
Signal
Signal
Flow
Flow
Digital Tuner
Digital Tuner
DG
TU8301
H
TU3200
TUNER
AV1
AV2
AUDIO IN
AUDIO
OUT
HDMI1
HDMI2
DIG.TUNER
IC2011
AUDIO
AMP
IC3101
AUDIO
SWITCH
IC2302
IC2012
HP AMP
IC4503
DEMODULATOR
IC2002
AUDIO
DAC
IC2106
AUDIO
PROCESSOR
AUDIO
AMP
HDMI SW
IC2301
AUDIO
AMP
IC8301
IC4510
A/D
Converter
and
HDMI-RX
IC4200
HQ1L
IC8001
PeaksLite2
DIGITAL AUDIO
PROCESS
GH
HDMI3
IC4207
LVDS TX
Analog
Digital
LCD
Panel
GS
IC1100
STB
MCU
LXD700/
G AV3
HP
LX700 Only
LXD700/
LXD70 Only
32
Page 33
3.((44) )
22--3.
Audio
Audio
Signal
Signal
Flow
Flow
HDMI
HDMI
DG
TU8301
H
TU3200
TUNER
AV1
AV2
AUDIO IN
AUDIO
OUT
HDMI1
HDMI2
DIG.TUNER
IC2011
AUDIO
AMP
IC3101
AUDIO
SWITCH
IC2302
IC2012
HP AMP
DEMODULATOR
IC2002
AUDIO
DAC
IC2106
AUDIO
PROCESSOR
AUDIO
AMP
IC4503
HDMI SW
IC2301
AUDIO
AMP
IC8301
IC4510
A/D
Converter
and
HDMI-RX
IC4200
HQ1L
IC8001
PeaksLite2
DIGITAL AUDIO
PROCESS
GH
HDMI3
IC4207
LVDS TX
Analog
Digital
LCD
Panel
GS
IC1100
STB
MCU
LXD700/
G AV3
HP
LX700 Only
LXD700/
LXD70 Only
33
Page 34
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
Page 35
3.Troubleshooting
35
Page 36
3.Troubleshooting
1）Some part of screen
2）All over screen
3）No Picture
4）Actual market trouble
36
Page 37
3.Troubleshooting for Picture Trouble
Trouble
Where is
abnormal picture
displayed ?
Upper or Lower
Left or Right
Vertical or Horizontal line
(1)Some part of screen
Upper
Panel
Lower
Panel
Right
Panel
Left
Panel
Panel
All over screen
(3)No picture
(2)All over screen
Many vertical line
37
Abnormal color
Non-uniformity color
Panel
OSD trouble
DG Board
Page 38
3-1.(1) Picture trouble for some part of screen
K
Digital
Tuner
Analogue
Tuner
AV input
Comp.
PC
V
H
Signal Processor
GH
HDMI
DG
PanelInput Source
REVIEW
LCD Panel
SPEAKER
H : AV Terminal / AV Switch /
K: Key Switch
V : Remote Receiver / Power LED
GS
DG: Digital Signal
Processor
/ HDMI Interface
GS : SD card
GH : HDMI Front
D : Format Converter
/ Plasma AI Processor
/ Sub-Field Processor
38
Page 39
3-1.(2) Picture trouble for some part of screen
Enlarged view of LCD
RGB Filter
Liquid Crystal
Back Light
39
Page 40
3-1.(3) Picture trouble for some part of screen
40
Page 41
3-1.(4) Picture trouble for some part of screen
<Actual Symptom>
<Symptom>Upper half or Lower half trouble
No Picture, Picture noise, Full Horizontal line, etc.
<Models>
All model
<NG Area>
(Front view)
1
Symptom Lower half picture trouble
Result LCD panel defect
LCD panel
<Defective parts>
LCD panel
1
2
DG
H
41
Page 42
3-1.(5) Picture trouble for some part of screen
<Actual Symptom>
<Symptom>Left half or Right half trouble
No Picture, Picture noise, Full Horizontal line, etc.
<Models>
All model
<NG Area>
(Front view)
Symptom Right half picture trouble
Result LCD panel defect
2
LCD panel
<Defective parts>
LCD panel
1
1
DG
H
42
Page 43
3-1.(6) Picture trouble for some part of screen
<Actual Symptom>
<Symptom>Horizontal line
Symptom Horizontal line
<Models>
All model
<NG Area>
(Front view)
Result LCD panel defect
LCD panel
<Defective parts>
LCD panel
1
DG
H
43
Page 44
3-1.(7) Picture trouble for some part of screen
<Symptom>Vertical line
<Models>
All model
<NG Area>
(Front view)
DG
<Actual Symptom>
Symptom Thin and vertical l line
Result LCD panel defect
H
LCD panel
<Defective parts>
LCD panel
1
44
Page 45
3-1.(8) Picture trouble for some part of screen
<Actual Symptom>
<Symptom>Vertical line noise
Symptom Vertical noise
<Models>
All model
<NG Area>
(Front view)
Result DG board defect
（Or LCD panel)
LCD panel
<Defective parts>
DG board defect
1
DG
H
45
Page 46
3-1.(9) Picture trouble for some part of screen
<Actual Symptom>
<Symptom>Sub picture NG
Symptom Sub picture NG
<Models>
All model
Result DG board defect
<NG Area>
(Front view)
LCD panel
<Defective parts>
DG board defect
1
DG
H
46
Page 47
3-2.(1) Picture trouble for all over screen
<Actual Symptom>
<Symptom>Non uniformity color
Symptom Irregular color
<Models>
All model
<NG Area>
(Front view)
Result LCD panel defect
LCD panel
<Defective parts>
LCD panel
1
DG
H
47
Page 48
3-2.(2) Picture trouble for all over screen
<Symptom>Vertical line line
<Models>
All model
<NG Area>
(Front view)
DG
<Actual Symptom>
Symptom Vertical line all screen
Result DG board defect
(Or panel)
H
LCD panel
<Defective parts>
DG board defect
1
48
Page 49
3-2.(3) Picture trouble for all over screen
<Actual Symptom>
<Symptom>O.S.D. trouble
Symptom OSD trouble
<Models>
All model
<NG Area>
(Front view)
Result DG board defect
LCD panel
<Defective parts>
DG board defect
1
DG
H
49
Page 50
3-2.(4) Picture trouble for all over screen
<Actual Symptom>
<Symptom>Abnormal color
Symptom Abnormal color
Result DG board defect
<Models>
All model
<NG Area>
(Front view)
LCD panel
<Defective parts>
DG board defect
1
DG
H
50
Page 51
3-3.No picture
<Symptom>No Picture with normal sound
<Actual Symptom>
Symptom No picture
Result DG board defect
H board defect
<NG Area> All
(Front view)
LCD panel
DG
ALL Input Source
Picture NG ?
H
Tuner
No picture but
OSD is displayed ?
Yes
No
No
Only AV Terminal
Picture NG
Analog TV
Picture NG
Tuner (H Board)
Only Digital
TV Picture NG
Only HDMI
Input Picture NG
LCD Panel or DG board
H Board
AV Terminal
Picture OK?
Yes
DG Board
DG Board
No
H Board
Yes
DG Board
51
Page 52
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
Page 53
4.Power supply Circuit
53
Page 54
4.Power Supply Circuit
1) Power Circuit Over view
2) Power supply sequence
3) Power Distribution
54
Page 55
4-1.(1) Power circuit Overview
AP board
AC Plug
Relay
Inverter
24V
Regulator
STB 5V
DTV 9V
HQ 3.3V
Sound 15V
Main 15V
Panel 12V
55
Page 56
4-1.(2) Power circuit Overview
<Block Diagram>
AC Plug in
STB 5V
P
Standby
Trans
Power SW
K
Relay
Inverter
LCD
Converter
AP
Relay ON
Panel STB ON
Regulators
TV main ON
12V
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
Panel 12V
Main 9V
SUB ON
DG
STB 5V
Micom
Micom
Panel
12V
56
Page 57
4-1.(3) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
Regulators
STB 5V
TV main ON
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
57
Page 58
4-1.(4) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
Regulators
STB 5V
TV main ON
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
58
Page 59
4-1.(5) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
Regulators
STB 5V
TV main ON
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter ON
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
59
Page 60
4-1.(6) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
Regulators
STB 5V
TV main ON
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter ON
Inverter
Panel
24V
LCD
Converter
Panel 12V
Main 9V
12V
12V
60
Page 61
4-1.(7) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
Regulators
STB 5V
TV main ON
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
Panel 12V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter ON
Inverter
Panel
24V
LCD
Converter
Main 9V
12V
12V
61
Page 62
4-1.(8) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
TV main ON
Regulators
STB 5V
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
62
Page 63
4-1.(9) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
TV main ON
Regulators
STB 5V
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
63
Page 64
4-1.(10) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
TV main ON
Regulators
STB 5V
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
64
Page 65
4-1.(11) Power circuit Overview
<Block Diagram>
AC Plug
P
Relay
Basic Process
Standby
Trans
AP
Relay ON
Panel STB ON
TV main ON
Regulators
STB 5V
SW
H
Sound 15V
Sub 5V
DTV 9V
HQ3.3V
SUB ON
DG
STB 5V
Micom
Micom
Power SW
K
Inverter
Panel
LCD
Converter
Panel 12V
Main 9V
12V
12V
65
Page 66
4-2.(1) Power Supply Sequence
<Block Diagram>
P
P
F801
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
Power SW
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
66
IC7501
IC7601
IC7701
Regulators
Page 67
4-2.(2) Power Supply Sequence
<Block Diagram>
P
P
Plug in
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
Power SW
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
67
IC7501
IC7601
IC7701
Regulators
Page 68
4-2.(3) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
Power SW
ON
5V
DG
AP
29
STB 5V Sense
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
68
IC7501
IC7601
IC7701
Regulators
Page 69
4-2.(4) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
Command
to Relay ON
DG
AP
STB 5V Sense
29
1
SUB ON
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
69
IC7501
IC7601
IC7701
Regulators
Page 70
4-2.(5) Power Supply Sequence
<Block Diagram>
P
P
FUSE
Power supply
From AC plug
Via Relay
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
Command
to Relay ON
DG
AP
STB 5V Sense
29
1
SUB ON
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
IC7501
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
70
IC7601
IC7701
Regulators
Page 71
4-2.(6) Power Supply Sequence
<Block Diagram>
P
P
FUSE
Power supply
From AC plug
Via Relay
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
Command
to Relay ON
24V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
IC7501
105
46
27
29
30
34
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
71
IC7601
IC7701
Regulators
Page 72
4-2.(7) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Sub 5V
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
72
24V
IC7501
IC7601
IC7701
Regulators
DTV 9V
HQ3.3V
Page 73
4-2.(8) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Sub 5V
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
73
IC7501
IC7601
IC7701
Regulators
DTV 9V
HQ3.3V
Page 74
4-2.(9) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
Sound 15V
105
46
27
29
30
34
Sub 5V
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
74
IC7501
IC7601
IC7701
Regulators
DTV 9V
Main 9V
HQ3.3V
Page 75
4-2.(10) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
105Panel stand by ON
IC7301
IC7401
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
Sound 15V
46
27
29
30
34
Sub 5V
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
75
IC7501
IC7601
IC7701
Regulators
DTV 9V
Main 9V
HQ3.3V
Page 76
4-2.(11) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
105Panel stand by ON
IC7301
IC7401
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
Sound 15V
46
27
29
30
34
Sub 5V
Panel
<Inverter>
<Inverter>
<Converter>
<Converter>
76
IC7501
IC7601
IC7701
Regulators
DTV 9V
Main 9V
HQ3.3V
Panel 12V
Page 77
4-2.(12) Power Supply Sequence
<Block Diagram>
P
P
FUSE
<Standby Trans former>
<Standby Trans former>
T801
<Standby Relay>
<Standby Relay>
RL802
5V
DG
AP
STB 5V Sense
29
SUB ON
1
32LXD700series
IC1100
Panel stand by ON
TV Main ON
MAIN 5V SENSE
STB 5V SENSE
DTV 9V SENSE
SUB 5V SENSE
IC7301
IC7401
105
46
27
29
30
34
Sub 5V
Sound 15V
Panel
<Inverter>
<Inverter>
24V
<Converter>
<Converter>
77
IC7501
IC7601
IC7701
Regulators
DTV 9V
Main 9V
HQ3.3V
Panel 12V
Page 78
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(1)
(1)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
HQ3.3V
MAIN 9V
12V
Regulator
78
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 79
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(2)
(2)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
HQ3.3V
MAIN 9V
12V
Regulator
79
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 80
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(3)
(3)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
HQ3.3V
MAIN 9V
12V
Regulator
80
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 81
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(4)
(4)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
HQ3.3V
MAIN 9V
12V
Regulator
81
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 82
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(5)
(5)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
ON
HQ3.3V
MAIN 9V
12V
Regulator
82
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 83
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(6)
(6)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
ON
HQ3.3V
MAIN 9V
12V
Regulator
83
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 84
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(7)
(7)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
ON
HQ3.3V
MAIN 9V
12V
Regulator
84
PANEL 12V
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 85
Ref
Ref
24V
: AP Board Regulator Circuit
: AP Board Regulator Circuit
IC7301
(8)
(8)
24V
AP
15V
IC7401
5V
IC7501
9V
IC7601
3.3/9V
IC7701
ON
ON
ON
ON
SOUND 15V
SUB 5V
DTV 9V
Q7551
FET
ON
HQ3.3V
MAIN 9V
12V
Regulator
85
PANEL 12V
ON
DG
PANEL_ON from MCU
MAIN_ON from MCU
Page 86
4-3.(1) Power Distribution
24V
IC7301
15V
IC7401
5V
IC7501
9V
IC7601
Q7551
FET
ON
24V
SOUND 15V
SUB 5V
DTV 9V
AP
MAIN 9V
①
②
③
④
3.3/9V
IC7701
12V
HQ3.3V
PANEL 12V
From Switch
86
STB 5V
⑤
⑥
⑦
Page 87
4-3.(2) Power Distribution Sound 15V・SUB5V
AP
①
②
IC7301
Sound 15V
IC7401
Sub 5V
AP3
2
3
21
22
H3
2
3
21
22
H
IC2301
Audio Amp
IC2302
Audio Amp
IC2002
Audio Amp
TU3200
Analogue
Tuner
H2
DG2
DG
IC4500/4501
EPROM
Main 5V
Q5692
Sub 5V→Main 5V
IC4513/4514
BUS REP
Sub 5V
12
14
87
12
Sub 5V
14
TU8301
Digital
Tuner
Page 88
4-3.(3) Power Distribution DTV 9V・Main 9V
AP
③
ON・OFF
24V Det
IC7501
DTV 9V
Q751
AP3
17
18
H
H3
17
18
IC3001
Video SW
IC3002
Audio Switch
IC2011
Audio Amp
IC2690
Q2639
BT30V Supply
DTV 9V
H2
21
DG
IC4002
Regulator
IC5600
DC/DC decoder
IC 8301
COFDM DEM
DG2
21
DTV 9V
IC8001
Peaks Lite2
IC5660
Reset
IC8004
Clock gain
IC8601
EPROM
SUB3.3V
IC5660
DTV9V→SUB 3.3V
④
Main 9V
22
23
22
23
IC2013
Regular
Main 9V
Q401-4003
AH-F_Y
AH-F_V
AH-F_S
H2
21
88
DG2
Main 9V
21
Page 89
4-3.(4) Power Distribution HQ3.3V
AP
⑤
IC7601
HQ 3.3V
AP4
16
17
H
H4A
16
17
H2
1
2
DG2
1
2
DG
IC4207
IC4203
IC4205
IC4206
LVDS
MHQDLV3.3V
Regulator
MHQDDR2.5V
MHQLV3.3V
MHQPL1.2V
MHQPL3.3V
MHQDDR1.2V
IC4200
HQ1L
89
Page 90
4-3.(5) Power Distribution Panel 12V
AP
⑤
IC7701
Panel 12V
AP4
11
12
H
H4A
11
12
H2
11
12
DG
DG2
11
12
DG25
1
2
3
4
Panel
Panel Controller
12V
Inverter
90
Page 91
4-3.(6) Power Distribution STB5V
AP H DGK
SW
K8
3
P6
3
⑦
AP43H4A H2
3
23
DG2
23
STB 5V
IC1101 EPROM
IC5670
IC1100
GENX4
STB 3.3V
91
Page 92
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
92
Page 93
5.Protection Circuit
93
Page 94
5.(1)
5.(1)
P
rotection Circuit
P
rotection Circuit
<LED Blinking timing>
e
c
n
O
4.0sec (interval)
Light
<Check point>
LED
Blinking
times
1
No FAN
2
3
4
5
6
7
8
9
INVERTER_SOS
FAN SOS
REG. voltage abnormality
DTV9V abnormality
SUB5V abnormality
MAIN9V abnormality
MAIN5V abnormality
MAIN3.3V abnormality
Voltage for sound abnormality
No Light
Contents Check Point
LCD panel, DG Board
Board
H, AP, DG Board
AP, H, DG Board (BT30V,SOUND15V,PANEL12V,HQ3.3V O.V.P.)
AP, H, DG Board
AP, H, DG Board
DG Board
DG Board
H, DG Board (Sound SOS*)
(BT30V,SOUND15V,PANEL12V,HQ3.3V Short)
10
13
HQ1L_SOS
Communication error
(PeaksLite2_GenX4)
DG Board
DG Board
94
Page 95
5.(2)
5.(2)
P
rotection Circuit
P
rotection Circuit
Power LED Status
No Light
T801
STB
Trans
P11
2
1
P
Line
Filter
Defective Board
P, DG Board
Relay doesn’t turn ON by Power SW ON and Remote Power ON
1
P8
1
2
Power
Switch
STB5V
AC output
between 1 and 2 pin
of P11 ?
2
When AC Plug IN,
STB 5V output
at P8’s 1 pin ?
DG Board
AP
Yes
Yes
No
AC power code NG or Power Source NG
No
P Board
Note :
How to stop power supply completely is
disconnecting AC cord,
not turning OFF the power SW.
H
DG
STB 3.3V
IC1100
MCU
1
Q802
RL802
Relay
D801
8
P9
5-8
P10
1
3
AP5P5
8
STB5V
24V
V+
V-
LCD Panel
INV ON
INV SOS
12V
AP4
95
H4A
3
3
V
LED(R)
H2
23
V1
7
DG2
23
DG1
3
29
49
STB 5V
SENSE
R LED ON
Page 96
5.(3)
5.(3)
Contents Defective Board
LED 1 time blink
LED 1 time blink
Inverter SOS
1
Power SW ON.
12V output
at DG27’s 1pin
before Shutdown ?
P
P11
2
1
Line
Filter
Relay
Q802
Yes
T801
STB
Trans
RL802
D801
No
AP Board
5Vs
5Vs
P5
1-3
9
P9
5-8
P10
1
3
LCD PANEL, DG Board
2
Power SW ON.
INV_ON output
at DG27’s 2pin
before Shutdown ?
Yes
AP
24V
AP5
1-3
9
IC7701
12V
24V
V+
V-
PANEL12V
LCD Panel
INVERTER
No
DG Board
PANEL ON
INV ON
INV SOS
12V
3
Power SW ON.
ADIM output
at DG27’s 3pin
before Shutdown ?
AP4
11-12
15
8
Normal (Low)
Abnormal (High)
96
Yes
H4A
11-12
15
8
H
No
DG Board
V
LED(R)
INV ON
INV SOS
CURRENT(ADIM)
5-6 5-6
H6
55
49
V1
1
2
3
INV 12V
INV_PWM
4
Power SW ON.
INV_PWM output
at DG27’s 5pin
before Shutdown ?
Yes
LCD Panel
DG
DG2H2
IC1100
DG6
55
49
105
1
PANEL_ON
SUB_ON
No
DG Board
MCU
L
DG1
49
R LED ON
INV_ON
13
123
INVERTER SOS
IC4200
HQ1L
4
3
DG27
2
4
1
3
5
7
Page 97
5.(4)
5.(4)
Contents Defective Board
LED 3 times blink
LED 3 times blink
DOWN :BT 30V, SOUND 15V, PANEL 12V, HQ 3.3V
Power SW ON.
1
24V output
at P9’s 5-8 pin
before shutdown ?
P
P11
Line
2
Filter
1
Relay
Q802
T801
STB
Trans
RL802
D801
Yes
P5
No
1-3
9
P9
5-8
P10
5Vs
5Vs
1
3
LCD Panel
Disconnect AP3.
AP3’s 2,3,17,18 pin
Short with GND ?
2
AP Board
AP
AP5
1-3
9
1
No
Yes
IC7401
5V
IC7301
15V
IC7501
9V
IC7601
3.3V
IC7701
12V
Back Lights
+24V
V+
V-
INVERTER
Connect AP3.
AP3’s 2,3,17,18 pin
Short with GND ?
3
H Board
SUB 5V
SOUND 15V
DTV 9V
HQ3.3V
Panel 12V
INV ON
INV SOS
12V
Q7213
Panel
Controller
H, AP, DG Board
No
Disconnect DG2.
DG2’s 2 pin
Short with GND ?
4
Yes
D7207
D7204
Q7214
D7210
LCD Panel
97
DG Board
Q7206
Yes
AP3
AP4
1
16-17
11-12
8
Connect DG2.
No
Disconnect DG25.
After Power SW ON,
power comes up ?
5
LCD Panel
3
2
STB5V
Q2637
1
8
V
SOUND
15V
BT30V
LED(R)
H3A
2-32-3
17-1817-18
H4A
16-17
11-12
Yes
H
TUNER
V1
7
No
6
Disconnect DG27.
DG27’s 1 pin,
Short with GND ?
DG Board
DG
4
H2
DG2
1-2
5-6
H6
38
49
12V
5
12V
1-2
5-6
DG6
38
49
DG1
3
DG25
1-4
6
DG27
1
Yes
LCD PANEL
HQ3.3V
Panel 12V
114
SOS
SUB_ON
1
R LED ON
49
No
IC1100
MCU
Page 98
5.(5)
5.(5)
LED 4 times blink
LED 4 times blink
Contents
Case1) DTV 9V down
Case2) Over :SOUND 15V, SUB5V, DTV9V, PANEL 12V, HQ 3.3V, 24V
1
Disconnect AP3.
AP3’s 17,18 pin
Short with GND ?
AP Board
P
P11
Line
2
Filter
1
Relay
Yes
T801
STB
Trans
RL802
P5
1-3
9
No
5Vs
5Vs
2
Disconnect DG2.
H2’s 8 pin
Short with GND ?
AP5
1-3
3
4
H Board
AP
STB5V
Yes
15V
3.3V
15V
5V
9V
IC7701
Q7202
No
IC7301
IC7401
IC7501
IC7601
Q7204
3
Disconnect DG2.
DG2’s 8 pin
Short with GND ?
SOUND 15V
DG Board
SUB5V
DTV 9V
HQ3.3V
PANEL12V
Yes
24V
Defective Board
AP, H, DG Board
Power SW on.
4
No
24V output
at P5’s 1~3 pin
before shutdown ?
AP Board
H
1
AP3
17-18
AP4
H3A
17-18
H4A
8
8
No (Over 24V)
No (０V)
Yes (The other volts over)
IC3101
H2
8-9
2
DG
DG2
8-9
3
H6 DG6
49
49
L
LCD Panel
P Board
IC1100
DTV9V SENSE
30
SUB_ON
1
MCU
Q802
D801
P9
5-8
P10
1
3
Q7201
24V
V+
V-
LCD Panel
INV ON
INV SOS
12V
V
LED(R)
98
V1
7
DG1
3
49
R LED ON
Page 99
5.(6)
5.(6)
LED 5 times blink
LED 5 times blink
Contents Defective Board
MAIN 9V AP, H, DG Board
P11
2
1
P
Q802
Line
Filter
Relay
T801
STB
Trans
RL802
D801
P5
1-3
9
P9
5-8
P10
1
Disconnect AP3.
AP3’s 23 pin
Short with GND ?
Yes
AP Board
5Vs
5Vs
AP
IC7501
Q7551
9V
AP5
24V
1-3
9
LCD Panel
1
3
24V
V+
V-
No
MAIN 9V
INV ON
INV SOS
12V
2
Disconnect DG2.
H2’s 21 pin
Short with GND ?
H Board
AP3
23
AP4
8
Yes
1
H3A
23
H4A
8
No
H
DG Board
V
LED(R)
V1
7
H2
21
H6
49
DG
IC1100
MCU
DG2
2
DG6
49
DG1
21
3
L
L
66
1
49
MAIN9V
SENSE
SUB_ON
R LED ON
99
Page 100
5.(7)
5.(7)
LED 6 times blink
LED 6 times blink
Contents Defective Board
SUB 5V AP, H, DG Board
P11
2
1
P
Q802
Line
Filter
Relay
T801
STB
Trans
RL802
P5
1-3
9
P9
5-8
5Vs
5Vs
AP5
1-3
9
AP
1
24V
Disconnect AP3.
AP3’s 21,22 pin
Short with GND ?
Yes
AP Board
IC7401
5V
LCD Panel
SUB5V
No
2
Disconnect DG2.
DG2’s 12 or 14 pin
Short with GND ?
AP3
21-22
AP4
1
8
Yes
DG Board
H3A
21-22
AP4
8
H
V
LED(R)
No
IC2008
V1
7
H Board
H2
12-14
H6
49
DG
IC1100
MCU
DG2
2
12-14
DG6
49
DG1
3
L
L
34
SUB5V SENSE
SUB_ON
1
R LED ON
49
D801
P10
1
3
24V
V+
V-
INV ON
INV SOS
12V
100
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