KONKA KLC-2611QG Schematic

LCD TV SERVICE MANUAL

Model list
KLC-2611QG ,
KLC-2718QG ,
KLC-3216QG ,
KLC-3211QG ,

KLC-3711QG ,

KONKA GROUP CO,LTD.

Digital Flat Display Division

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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.

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A. SPECIFICATION

System : PAL I D/K B/G, SECAM D/K B/G L

Channel : VHF~ Low BAND ： 0 CH（46.25MHz） ~S9 CH（161.25MHz）

VHF~ High BAND ： S10 CH（168.25MHz）~S41 CH（463.25MHz）
UHF BAND ： E21CH（471.25MHz）~E69 CH（855.25MHz）

IF : VIF 38.9MHz SIF 33.4 MHz CIF 34.47 MHz

Audio Output Power : 7% THD 4 W+4 W

Antenna Impedance : 75Ω

Power Consumption : 26’=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
Y/ Composite 、Cb、Cr

Y、Pb、Pr
VGA

PC Audio input

DVI

Scart RGB & Composite
Scart Composite & Y/C
Earphone audio output

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B. ADJUSTMENT MANUAL

Video Signal

ey of the remote controller 5 times in 3

will

een. 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
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”
display in the scr
“menu”
status.

“AUTO COLOR”

x:285 y:293 Y:160cd/m2

y:315 Y: 160cd/m2

d.6500K

4.TV setting

AFC setting

Color analyzer

TV Signal Generator

Full white pattern Adjust R.G.B data in factory status

y:329 Y: 160cd/m2

60dB

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Set “AFC” on

b. AGC adjust

Video Signal

picture

Function check

Signal

Color bar and

Power Lose

ake off the signal

or not

model

5. check the power loss is less than 5

function

ith DDC Card

VGA OR

TV
Generator

60dB , Color bar and Gray Adjusting the AGC data to make the

in the best condition

5. GAMMA

6. OSD

7.

check

8.DDC

check

C. Key IC list

Pattern Generator 1280X1024@75Hz；256 Gray

Pattern Generator
TV Video

Generator

1280X1024@75Hz ；
256 Gray；

TV: 60dB
Gray

TV Video
Signal Generator

T
cable

Power Meter

A PC w

1280X1024@75Hz
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”

3. the TV get into “save power ”

4. check the LED is yellow or not

W or not

Check the DDC function is ok NG

Item P/N Type Maker Package Circuit No.

1 19004139
2
3 19004142
4 19004143
5 19005050
6 19003673

8
9

11 19002575
12
13

14
15

19004330

19002812
19005170
19003989
19004120
19005431
19005589
19004239
19004569 EDD1232AAFA-6B-E

19004169
19004171 IS62WV2568BLL-70HI

19005599
32001259
19002550

W39L040P-70B WINBOND PLCC-32 N405,N401 2

MSP3410G MICRONAS PMQFP64 N103 1

24LC32A MICROCHIP SOIC-8 N502 1

FLI2310-BD GENESIS PQFP-208 N411 1

GM1501 GENESIS PBGA-416

74LVC14A PHILIPS SOIC14 N303 1
VPC3230D-B4 7
VPC3230D-C5

TDA9886T PHILIPS SSOP-24 N102

IS42S32200B-7T ISSI

IS42S32200C1-6TL
HY57V643220DT-7

K4D263238F-QC50 SAMSUNG 10

24LC16B MICROCHIP SOIC-8 N406 1

SDA5550M MICRONAS PMQFP-100

K6F2008V2E-LF70 Samsung

Tuner Qingjia

TDA8944J PHILIPS DSP-17 N201 1

MICRONAS PQFP-80 N412 1

TSOP-86 N402 1

ISSI

HYNIX

TQFP-100 N403 1

EPLIDA

ISSI

TSOP-28 N404 1

N101

N501 1

N407 1

Qty.

1

1

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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

Key board

IR

Digital board

Back light

Control

Power

Supply

Inverter

to panel

Chassis

board

LVDS to

panel

Speaker

connector

Change

System Power supply

GM1601/1501

GM1601/1501

Power board

CHASSIS SYSTEM LAYOUT

CHASSIS SYSTEM LAYOUT

input

AC

Switch

Sound

connector