KONKA KLC-3216UG, KLC-3211UG, KLC-3711UG Schematic
LCD TV SERVICE MANUAL
Model list
KLC-2718UG
KLC-3216UG
KLC-3211UG
KLC-3711UG
KONKA GROUP CO,LTD.
Digital Flat Display Division
IMPORTANT SERVICE SAFETY INFORMATION
Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these
models should only be performed by those who are thoroughly familiar with precautions necessary when working on
high voltage equipment.
Exercise care when servicing this chassis with power applied. if carelessly contacted, can cause serious shock or
result in damage to the chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture
tube dag and tuner when operating chassis.
When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an Isolation
Transformer must be used as a safety precaution and to prevent possible damage to transistors. The Isolation
Transformer should be connected between the TV line cord plug and the AC power outlet.
It is important to maintain specified values of all components and anywhere else in the received that could cause
a rise in operating supply voltages. No changes should be made to the original design of the receiver.
Components shown in the shaded areas on the schematic diagram and/or identified by in the replacement parts
list should be replaced only with exact factory recommended replacement parts. The use of unauthorized substitute
parts man creates may create shock, fire, or other hazards.
Before returning the receiver to the user, perform the following safety checks:
1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis
and other metal parts in the receiver.
2. Replace all protective devices such as non-metallic control knobs, insulating fish papers, cabinet backs, adjustment
and compartment covers of shields, isolation resistor-capacitor networks, mechanical insulators etc.
3. To be sure that not shock hazard exists, a check for the presence of leakage current should be made at each exposed
metal part having a return path to the chassis (antenna, cabinet metal, screw heads knobs and/or shafts, escutcheon,
etc.) in the following manner.
Plug the AC line cord directly into a 110V/220V/240V, AC receptacle. (Do not use an Isolation Transformer
during these checks.) All checks must be repeated with the AC line cord plug connection reversed. (If necessary, a
non-polarized adapter plug must be used only for the purpose of completing these checks.)
PLEASE READ BEFORE ATTEMPTING SERVICE
1. Use an Isolation Transformer when performing any service on this chassis.
2. Never disconnect any leads while receiver is in operation.
3. Disconnect all power before attempting any repairs.
4. Do not short any position of the circuit while the power is on.
5. For safety reasons, replace components any with identical replacement parts (SEE PARTS LIST).
6. Before alignment, warm up the TV for at least 30 minutes.
7. When removing a PCB or related component, after unfastening or changing a wire, be sure to put the
wire back in its original position.
8. Inferior silicon grease can damage IC's and transistors. When replacing IC's and transistors, use only
specified silicon grease. Remove all old silicon when applying new silicon.
9. Before removing the anode cap, discharge eletricity because it contains high voltage.
www
A. SPECIFICATION
System : NTSC-M
Channel : L-VHF: 2～6 55.25MHz～83.25MHz
H-VHF: 7～13 175.25MHz～211.25MHz
UHF :14～69 471.25MHz～801.25MHz
CABLE:2～G 55.25MHz～157.25MHz
H～CCC 163.25MHz～451.25MHz
DDD～125 457.25MHz～801.25MHz
IF : VIF 45.75MHz ; SIF 41.25 MHz ; CIF 42.17 MHz
Audio Output Power : 7% THD 4 W+4 W
Antenna Impedance : 75Ω
Power Consumption : 27”=160W 32”=180W 37”=200W
Power Supply : AC 110~240V, 50/60Hz
Item
1
2
3
4
5
6
7
8
9
Port list
RF cable
VIDEO /Y 、Cb、Cr
Y、Pb、Pr
VGA
PC Audio input
DVI
VIDEO
S-VIDEO(Y/C )
Earphone audio output
B. ADJUSTMENT MANUAL
Signal
ey of the remote controller 5 times in 3
will
splay in the screen. Then push the
key to enter the factory setting
Video Signal
Pattern Generator
Pattern Generator
x:299
Pattern Generator
x:313
, Color bar and Gray
Ⅰ. TEST NOTE
1. Please follow the pointed test steps and choose the right test equipment to conduct
adjustment, otherwise good effect of Unit could not be obtained. The unit should be
warmed up for 30 minutes before adjustment and every parameter should be adjusted
repeatedly till the optimum value obtained, the pointed voltage value should be ensured
during test to get satisfied test result.
2. Test environment
1) Temperature ： 15°C-35°C
2) Relative Humidity : 45-75%
3) Air pressure : 86-106KPa
3 Test equipments（The following equipment should be calibrated before testing）
1) Computer 1 set
2) Multi-meter (VICTOR VC9801) 1 set
3) Video Signal Generator (Chroma Model 2227/2327) 1 set
4) Color Analyzer (Chroma Model 7120 ) 1 set
5) DDC card (DYNACOLOR, INC D8330) 1 slice
6) TV Video Signal Generator (FLUKE PM54200) 1 set
Item Equipment Condition Adjust method
1. Enter the
adjust menu
2. Loading
default data
3.Color
temperature
adjust
a. Auto adjust Pattern Generator
b.9300K
c.7500K
TV Video
Generator
TV
Generator
Color analyzer
Color analyzer
Color analyzer
Gray
Gray “LOAD DEFAULT”
1280*1024 75HZ
Color bar
Full white pattern Adjust R.G.B data in factory status
Full white pattern Adjust R.G.B data in factory status
Power on the TV , push the “call”
K
seconds. The “ version xxxx”
di
“menu”
status.
“AUTO COLOR”
x:285 y:293 Y:160cd/m2
y:315 Y: 160cd/m2
d.6500K
Color analyzer
4.TV setting
a.AFC setting
TV Signal Generator
Full white pattern Adjust R.G.B data in factory status
y:329 Y: 160cd/m2
60dB
Set “AFC” on
b. AGC adjust
60dB , Color bar and
256
A PC with DDC
TV Video Signal
Generator
Gray
Adjusting the AGC data to make the picture
in the best condition
5.GAMMA
6. OSD
Function check
7.Power Lose
check
8.DDC function
check
Pattern Generator
Pattern Generator
TV Video Signal
Generator
TV Video
Signal Generator
Power Meter
Card
1280X1024@75Hz ；
Gray
1280X1024@75Hz ；
256 Gray；
TV: 60dB Color bar and
Gray
Take off the signal
cable
1280X1024@75Hz VGA OR
DVI model
Set Gamma data is “1.0”
Check all the function in OSD menu
1. Turn the TV to TV model
2. check the osd is “ no signal” or not
3. the TV get into “save power ” model
4. check the LED is yellow or not
5. check the power loss is less than 3
W or not
Check the DDC function is ok or NG
C. Key IC list
Item P/N Type Maker Package Circuit No.
1 19004139
2
3 19004142
4 19004143
5 19004144
6 19003673
8
9
11
12
13
14
W39L040P-70B WINBOND PLCC-32 N401 1
19004140
19002812
19005170
19003431
19004120
19005431 IS42S32200C1-6TL ISSI
19005589 HY57V643220DT-7 HYNIX
19004239
19004569 EDD1232AAFA-6B-E
19004141
19004171 IS62WV2568BLL-70HI
19005599
32001189
19002550
MSP3420G MICRONAS PMQFP64 N103 1
24LC32A MICROCHIP SOIC-8 N502 1
FLI2310-BD GENESIS PQFP-208 N411 1
GM1501H GENESIS PBGA-416
74LVC14A PHILIPS SOIC14 N303 1
VPC3230D-B4 7
VPC3230D-C5
TDA9885T PHILIPS SSOP-24 N102
IS42S32200B-7T ISSI
K4D263238F-QC50 SAMSUNG 10
Z86229 ZILOG SOIC-18 N410 1
K6F2008V2E-LF70 Samsung
Tuner Qingjia N101 1
TDA8944J PHILIPS DSP-17 N201 1
MICRONAS PQFP-80 N412 1
EPLIDA
ISSI
Qty.
N501 1
1
TSOP-86 N402 1
TQFP-100 N403 1
TSOP-28 N404 1
System Power supply
Speaker
connector
Inverter
to panel
Back light
Control
GM1601/1501
GM1601/1501
Change
board
Chassis
Power
Supply
Digital board
CHASSIS SYSTEM LAYOUT
CHASSIS SYSTEM LAYOUT
Power board
LVDS to
panel
Sound
connector
IR
Key board
System power supply : DC+12V +24v +5v(standby), PW_off
Chassis power supply : DC +12V +5V(standby), PW_off
Back light control : DC +3.3V or +5V
Inverter to panel : DC +24V or +18V, back light control( +3.3V or +5V)
LVDS to panel : DC +12V or +5V , +/-RX 0,1,2,3
AC input : AC 110V~240V 50/60HZ
AC
input
Switch
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