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cftd2011
schematic
46 pgs7.88 Mb0

Akai cftd2011 schematic

CFTD2011
LCD TV/DVD
ERVICE MANUAL
S
IMPORTANT INFORMATION
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage
”
within the product's enclosure that may be of sufficient magni-
tudetoconstituteariskofelectricshocktopersons.
The exclamation point within a triangle is intended to alert the user to the presence of important operating and maintenance(servicing)instruction acco mp anyi n g th e produc t.
CONTENT
Safty Precaution ................................................................................................................................page 1~ 1
Technical Specifications .....................................................................................................................page 2~ 2
Trouble Shooting Flow Chart ............................................................................................................... page 3~ 5
Block Diagram .................................................................................................................................... page 6~ 6
WiringDiagram ................................................................................................................................... page 7~ 7
MainBoard ........................................................................................................................................ page 8~22
Control Board ..................................................................................................................................... page23~25
DVDBoard .........................................................................................................................................page26~32
Replacement Part List ........................................................................................................................page33~33
FirmwareUpgrade method.................................................................................................................. page34~43
ExplodedDrawing .............................................................................................................................. page44~44
SAFETY PRECAUTION
art
z In order to prevent you from any possible injury caused by high voltage, please do not touch the inverter directly
while repairing the unit.
z While adjusting the unit, be sure to groud connected instruments adn your body to prevent sstatic electricity
destroying the ICs.
Earth ring
(Lead wire)
Pick-up case
Chassis (GND)
Resistor
1M ~10M
ΩΩ
E
h
1
TECHNICAL SPECIFICATIONS
LCD TV section
Screen Size ............................................................................................................................ 20TFT-LCDPanel
Aspect Ration ............................................................................................................................................... 4:3
Contrast Ratio ........................................................................................................................................... 600:1
Brightness ......................................................................................................................................... 500 cd/m
High color saturation ....................................................................................................................... NTSC 7 5 %
Resolution ......................................................................................................................................... 480I/480P
Pixel Pitch(HXV) ...............................................................................................................0.2125mm 0.6375mm
Display colors .......................................................................................................................................... 0.26M
ResponseTime(Tr/Tf) ............................................................................................................................... 3/5ms
ViewingAngles Horizontal .................................................................................................................160Degree
Viewing Angles Vertical .....................................................................................................................140Degree
TV Tuning Compatible ......................................................................................................... NTSC 181 Channels
Special Features:
................................................................................................................................................................. MTS
...................................................................................................................................................... Sleep Timer
.................................................................................................................................................... 4H comb filter
........................................................................................................................................................ Deinterlace
............................................................................................................................................................... V-chip
.................................................................................................................................................. Closed Caption
................................................................................................................................ Full function remote control
Input Terminals:
............................................................................................................................................................ Antenna
.................................................................................................................................................................. AV1
......................................................................................................................................................... S-VIDEO1
....................................................................................................................................................... Component
Power Consumption ......................................................................................................................... 90W (MAX)
Power Supply ................................................................................................................... 100~240 VAC at 1.5A
o
OperationTemperature ....................................................................................................................... 0
StorageTemperature ............................................................................................................ From -10
C~45oC
o
CTo60oC
2
DVD section
Laser type .......................................................................................... Semiconductor laser, Wavelength 650nm
Signal system ............................................................................................................. PAL625/50, NTSC520/60
Video ouptut level ..................................................................................................................... 1 Vp-p (75 ohm)
Video Y output level .................................................................................................................. 1 Vp-p (75 ohm)
Video C output level ...........................................................................................................286 m Vp-p (75 ohm)
Horizontal resolution ............................................................................................................................ 480 lines
S/N ratio ................................................................................................................................................... 60 dB
Audiofrequency .......................................................................................... DVD (PCM) 20Hz-22kHZ (+/-1.0 dB)
Response ................................................................................................................. CD 20Hz-20kHz (+/-1.0dB)
S/N ratio .................................................................................................................................................... 80dB
Dynamic range........................................................................................................ DVD (PCM): 85dB; CD:85dB
Audio L/R ..................................................................................................................................... 2V 1kHz 0dB
Distortion ................................................................................................................................................... 0.1%
2
TROUBLE SHOOTING FLOW CHART (1)
TV / AV no picture Check U7,U15
No picture Back to default setting
All Source Chack U7,U15
All Source Check LVDS wire
Color NG Check U7,U15
YCBCR Check U15 out/put
All Source Check Front Panel
Video issue Line in Picture
Chect Panel
Back to default setting
Check signal source
Only one source Check Main Board ( U7,U15 )
Check Main Board
All Source Check Main Board ( U7,U15 )
Noise Check Main Board
TV Check signal source
Select TV source on OSD
Superimposed image All Source Check Main Board ( U7.U15 )
3
TROUBLE SHOOTING FLOW CHART (2)
check U26,U27 output
Check Main Board
TV Check or change U7,U18
No Sound Back to default setting
Other Source CheckU18
Check Main Board and wire connecting
all source
R or L no sound Check U7
Check Speaker connecting
one port Check U7,U26,U27
Check Speaker connecting
all source Check U7,U26,U27
Audio Issue Noise Check Speaker
one port Check U7,U26,U27
Check signal input source
all source Check U7,U26,U27
，
wire，U26,U27 output
，
Sound low Check U26,U27 power supply
TV check signal source
Back to default setting
Check U7,U26,U27
4
TROUBLE SHOOTING FLOW CHART (3)
Check AC Cord
r
r
Check Power Supply
Check Power Supply
t
Check CONTROL Board
Check CONTROL Board
Check Main Board ( U24 )
Check Remote controller
Check CONTROL Board
y
Check Power Supply
Check Main Board
No Powe
Power on NG
No back ligh
Key NG
No Work
Remote controller NG
Function issue Invalidity
Power LED NG CONTROL Board Check Wire
Check the wire form Power Supply to Main Boa
Check Main Board ( check Q10,Q13 )
Check front panel
Check batter
LED NG
Automatic on/off POWER
5
BLOCKDIAGRAM
6 6
L-CH
INVERTER
FCC Cable to LCD Panel
BOARD
POWER
J7
TV
J12
MAIN BOARD
J1
J3
J2
J5
J11
KEY/IR BOARD
WIRING DIAGRAM
R-CH
INVERTER
SPEAKER
CN6
CN7
CN1
7 7
DVD BOARD
2
2
1
A
1
3
4
5
D D
C C
B B
A
3
4
8 8
5
MAIN BOARD CIRCUIT (1)
2
2
1
A
1
3
3
TO debug
4
4
9 9
5
5
D D
C C
DVD
B B
KEY
A
MAIN BOARD CIRCUIT (2)
10 10
MAIN BOARD CIRCUIT (3)
2
2
1
A
1
3
4
3
4
11 11
5
D D
C C
B B
A
5
MAIN BOARD CIRCUIT (4)
1
A
1
2
3
4
2
3
4
12 12
5
D D
C C
B B
A
5
MAIN BOARD CIRCUIT (5)
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