Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩ and 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check(See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board mod-
ule or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specied otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10 % (by volume) Acetone and 90 %
(by volume) isopropyl alcohol (90 % - 99 % strength)
CAUTION: This is a ammable mixture.
Unless specied otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test xtures specied in this
service manual.
CAUTION: Do not connect the test xture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some eld-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging
wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity sufcient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500 °F to 600 °F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 °F to 600 °F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500 °F to 600 °F)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder ows onto and around both the component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the
good copper pattern. Solder the overlapped area and clip off
any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
This spec. sheet applies to LA66K Chassis applied LED TV all
models manufactured in TV factory
2. Specification
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 ±5 ºC of temperature and 65±10% of relative humidity if
there is no specific designation
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15
ºC
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours.
※ Caution
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area
3. Adjustment items
3.1. Main PCBA Adjustments
(1) ADC adjustment(OTP) : Component
(2) EDID downloads for HDMI
3.2. Final assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (In-Stop)
(5) GND and HI-POT test
4. MAIN PCBA Adjustments
4.1. ADC Calibration
- An ADC calibration is not necessary because MAIN SoC
(LGExxxx) is already calibrated from IC Maker
- If it needs to adjust manually, refer to appendix.
4.2. MAC Address, ESN Key and Widevine
Key download
4.2.1. Equipment & Condition
(1) Play file: keydownload.exe
4.2.2. Communication Port connection
(1) Key Write: Com 1,2,3,4 and 115200 (Baudrate)
(2) Barcode: Com 1,2,3,4 and 9600 (Baudrate)
4.2.3. Download process
(1) Select the download items.
(2) Mode check: Online Only
(3) Check the test process
- US, Canada models: DETECT -> MAC_WRITE ->
WIDEVINE_WRITE
- Korea, Mexico models: DETECT -> MAC_WRITE ->
WIDEVINE_WRITE
(4) Play : START
(5) Check of result: Ready, Test, OK or NG
4.2.4. Communication Port connection
(1) Connect: PCBA Jig -> RS-232C Port == PC -> RS-232C
Port
4.2.5. Download
(1) All models (16Y LCD TV + MAC + Widevine + ESN Key
and HDCP2.2)
3.3. Appendix
(1) Tool option menu, USB Download (S/W Update, Option and
Service only)
(2) Manual adjustment for ADC calibration and White balance.
(3) Shipment conditions, Channel pre-set
5.1.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2) How-it-works: When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 °C
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
- Before White balance adjustment, Keep power on status,
don’t power off
5.1.1.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
CH14)
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
10.1.3. Adjustment
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
When KEY(►) is pressed 216 Gray internal pattern will be
displayed.
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 216 Gray pattern.
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option.
* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. If all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essenti al that these spec ial safety parts s hould be replaced with the same compone nts as
recommended in this manual to prevent, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
List the basic steps that should typically be followed to remove components and materials requiring
selective treatment:
1.OPTIONAL: Depending upon the complexity of the disassembly process, a graphic depicting the locations
of items contained within the product which require selective treatment
(with descriptions and arrows identifying locations) can be inserted below:
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
WIFI_DM/DP Serial Resistor
LH60_w/o CI Slot : 0ohm
Others : 2.2ohm
WIFI_DM
WIFI_DP
M_RFModule_RESET
BT_RESET
R4001
2K
1/16W
5%
R4009
IR_33ohm
10K
R4019
33
VA4002
5.6V
IR_ESD_VARISTOR
R4011
1.8K
+3.4V_ST
IR_100ohm
R4019-*1
100
IR
LED_R
KEY2
KEY1
+3.4V_ST
C4012
0.1uF
16V
WIFI_EN
R4015 33
R4014
10K
OPT
C4014
0.1uF
16V
EAN64148901
IC4001
TJ2242GSF6
IN
1
GND
2
EN
3
+3.4V_WIFI
OUT
6
ILIMIT
5
FLAG
4
ILIM 1.036A
14K
R4016
3.3K
R4017
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
+3.3V_NORMAL
L6504
BLM15PX121SN1
10uF
10V
C6522
10uF
10V
C6501
TU_SIF
FE_DEMOD1_TS_ERROR
+3.3V_TUNER
TS_AR_0ohm
AR6501
0
FE_DEMOD1_TS_DATA_TU[0]
1/16W
FE_DEMOD1_TS_DATA_TU[2]
FE_DEMOD1_TS_DATA_TU[3]FE_DEMOD1_TS_DATA[3]
TS_AR_0ohm
AR6502
0
FE_DEMOD1_TS_DATA_TU[4]
FE_DEMOD1_TS_DATA_TU[5]
FE_DEMOD1_TS_DATA_TU[6]
FE_DEMOD1_TS_DATA_TU[7]
1/16W
POWER_ON/OFF2_3
+3.4V_ST
L6700
BLM15PX121SN1
F_NIM/MCP
F_NIM/MCP
C6700
0.1uF
C6703
10uF
10V
F_NIM/MCP
10K
R6700
F_NIM/MCP
+5V_NORMAL
C6705
1uF
10V
F_NIM/MCP
TS_AR_47ohm
AR6501-*1
TS_AR_47ohm
AR6502-*1
47
POK
EN
IN
BIAS
47
F_NIM/MCP
IC6700
TJ2132GDP
1
2
THERMAL
3
2A
4
9
8
7
6
5
[EP]GND
GND
FB
OUT
SS
FE_DEMOD1_TS_DATA[0]
FE_DEMOD1_TS_DATA[1]FE_DEMOD1_TS_DATA_TU[1]
FE_DEMOD1_TS_DATA[2]
FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[5]
FE_DEMOD1_TS_DATA[6]
FE_DEMOD1_TS_DATA[7]
R1
R2
C6708
0.01uF
50V
F_NIM/MCP
C6707
2700pF
50V
F_NIM/MCP
Vout=0.6*(1+R2/R1)
5.1 K
R67 06
R67 05
4.7 K
D_Demod_Core
F_NIM/MCP
F_NIM/MCP
F_NIM/MCP
C6709
10uF
10V
10K
R67 06-*1
TU_N/D_1.2V
R67 05-*1
10. 5K
TU_N/D_1.2V
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Error SymptomA. Video ErrorEstablished date2016.01.29
1/14
ContentNo video / Normal audioRevised date
Standard Repair Process
Page 43
Check voltage 13V
of Power B/D
No video /
No audio
Replace Main
B/D or Repair parts
Replace Adaptor
Normal
Voltage
Y
N
LCD TV
Error SymptomA. Video ErrorEstablished date2016.01.29
2/14
ContentNo video / No audioRevised date
Standard Repair Process
☞A13
Page 44
Y
N
☞ A5
N
Check RF Signal level
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Check
S/W Version
S/W Upgrade
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
Replace
Main B/D
Check
Tuner soldering
Y
N
Y
Y
. By using Digital signal level meter
. By using Diagnostics Setting on OSD
( Setting → Customer Support(red button on remote control) → Signal Test )
- Signal strength (Normal : over 50%)
- Signal quality (Normal : over 50%)
Y
Contact with signal distributor
or broadcaster (Cable or Air)
N
N
Y
N
☞ A6
End
Normal
Signal
Normal
Picture
Normal
Picture
Normal
Picture
SVC
Bulletin
End
End
Normal
Picture
LCD TV
Error SymptomA. Video ErrorEstablished date2016.01.29
3/14
ContentTuning fail, Picture broken/freezingRevised date
Standard Repair Process
Page 45
Y
N
☞ A5
Check RF Signal level
Check
S/W Version
S/W Upgrade
Y
N
Y
Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Y
Replace satellite setting
(match with installed ANT)
N
Y
N
☞ A6
Check satellite setting.
- Check LNB frequency
- Check satellite
- Check Satellite connection
(DiSEqC, motor, etc…)
Contact with signal
distributor
or broadcaster (Ca
ble or Air)
N
Check
Tuner soldering
Replace
Main B/D
Normal
Picture
Normal
Picture
Normal
Setting
SVC
Bulletin
Normal
Signal
End
End
LCD TV
Error SymptomA. Video ErrorEstablished date2016.01.29
4/14
ContentTuning fail, Picture broken/freezingRevised date
Standard Repair Process
Page 46
Color
error
Y
N
Check and re
place Link Ca
ble
(LVDS) and c
ontact conditi
on
Y
N
Replace Main B/D
Check error col
or input mode
Check color by input
- External Input
(COMPONENT/AV/HDMI)
Y
Check external
device and
cable
Replace Main B/D
N
☞A7
N
Y
Replace module
Request repair f
or external devi
ce/cable
Check Test pattern
☞A10
☞ A8 / A9
End
Color
error
Color
error
External
device/
Cable
Normal
External
Input
Compon
ent, HD
MI
error
LCD TV
Error SymptomA. Video ErrorEstablished date2016.01.29
5/14
ContentColor errorRevised date
Standard Repair Process
Page 47
N
Y
Check external
device connect
ion condition
Y
N
Check and rep
lace Link Cabl
e
Y
Replace M
odule
Check color condition by input
- External Input
(Component/AV/HDMI)
Vertical/Horizontal bar, residual image, light spot
Request repair
for external de
vice
☞A10
External device screen error-Color error
Connect other external dev
ice and cable
(Check normal operation o
f External Input, Compone
nt and HDMI by connectin
g Jig, pattern Generator, S
et-top Box etc.
N
Y
Replace
Main B/D
Check screen co
ndition by input
-External Input
(Component/AV/
HDMI)
Request repair for ex
ternal device
Check S/W Version
Y
N
S/W Upgrade
Y
N
Y
N
Replace Main B/
D
Replace
Module
☞A7
☞ A8/ A9
Check Test pattern
N
End
Screen
normal
Screen
normal
Screen
normal
Screen
normal
Screen
normal
End
End
Check
Version
Normal
Screen
External
Input er
ror
LCD TV
Error SymptomA. Video ErrorEstablished date2016.01.29
6/14
Content
Vertical/Horizontal bar, Residual Image,
Light spot, External device Color error
Revised date
Standard Repair Process
Y
N
End
Page 48
Power
LED On
Y
N
DC Power on
by pressing Power Key
On Remote control
Y
N
Check Adaptor/
Power cord
was inserted properly
Check
Power LED
Replace M
ain B/D
N
Y
Check ST-BY 3.5V
N
Replace Adaptor or R
eplace Main B/D
Y
☞A11
☞A16
Stand-By : Red
※
Power
LED On
Normal
Voltage
Normal
Operati
on
LCD TV
Error SymptomB. Power ErrorEstablished date2016.01.29
7/14
ContentNo powerRevised date
Standard Repair Process
End
Page 49
Normal
Voltage
N
Y
Check Power Off
Mode
Fix A/C cord & Outlet
Replace Main B/D
(If Power Off mode
is not displayed)
Check Adaptor volt
age
Y
N
Replace Main B/D
Replace Adaptor
Replace Adaptor
N
Y
☞A14
☞A13
StatusPower off ListExplanation
Normal
"POWEROFF_REMOTEKEY"Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER" Power off by OFF TIMER
"POWEROFF_SLEEPTIMER"Power off by SLEEP TIMER
"POWEROFF_INSTOP"Power off by INSTOP KEY
"POWEROFF_AUTOOFF"Power off by AUTO OFF
"POWEROFF_ONTIMER"Power off by ON TIMER
"POWEROFF_RS232C"Power off by RS232C
"POWEROFF_RESREC"Power off by Reservated Record
"POWEROFF_RECEND"Power off by End of Recording
"POWEROFF_SWDOWN"Power off by S/W Download
"POWEROFF_UNKNOWN"Power off by unknown status except listed case
Abnormal
"POWEROFF_ABNORMAL1"Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL"Power off by CPU Abnormal
* Please refer to the all cases which
can be displayed on power off mode.
Adaptor D
C Out
CPU
Abnorm
al
Abnorm
al1
NormalEnd
LCD TV
Error SymptomB. Power ErrorEstablished date2016.01.29
8/14
ContentOff when on/off while viewing, power auto on/offRevised date
ContentWrecked audio / Discontinuation / NoiseRevised date
Standard Repair Process
Page 52
Y
N
Check R/C itself O
peration
Y
Replace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
Check & Repair
Cable connection
Connector solder
Check 3.4V
On Main B/D
☞A16
N
N
Check Voltage 13V of Power B/D
☞A13
Check IR
Output signal
N
Y
Replace
IR B/D
N
☞A16
Replace
Main B/D
Y
☞A16
End
Normal
Operating
Normal
Voltage
Normal
Signal
Normal
Operating
Normal
Operating
End
Y
LCD TV
Error SymptomD. Function ErrorEstablished date2016.01.29
11/14
ContentRemote control & Local switch checkingRevised date
Standard Repair Process
Page 53
LCD TV
Error SymptomD. Function ErrorEstablished date2016.01.29
11/14
ContentWi-fi checkingRevised date
Standard Repair Process
3.Wifi operating error
Check INSTART
menu
Wi-Fi Mac
“NG”?
Y
Check RF Cable
Connection
N
Check voltage 3.4V ST
1pin
Replace Wi-fi modu
le
Normal
Voltage
Close
Y
Y
N
Replace Main B/D
Wi-Fi Mac
“NG”?
N
Close
☞A15
☞A4
☞A4
☞A15
Page 54
Check technical in
formation
- Fix information
- S/W Version
N
Y
Check input
signal
Y
N
Check and fix
external device/cable
Replace Main B/D
Fix in accorda
nce with tech
nical informati
on
Signal
Input
Technical
information
External Input and
Component
Recognition error
HDMI
Recognition error
LCD TV
Error SymptomD. Function ErrorEstablished date2016.01.29
12/14
ContentExternal device recognition errorRevised date
Standard Repair Process
Page 55
Check locatio
n of noise
Identify n
ose type
Replace Main Board
Check location
of noise
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W or
provide the description)
※ If there is a “Tak Tak” noise from the cabinet, refe
r to the KMS fix information and then proceed as sho
wn in the solution manual
(For models without any fix information, provide the d
escription)
or
※ Mechanical noise is a natural phenomeno
n and apply the 1st level description.
When the customer does not agree, apply th
e process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s Manua
l.
Circuit
noise
Mechanical
noise
LCD TV
Error SymptomE. NoiseEstablished date2016.01.29
13/14
ContentCircuit noise, Mechanical noiseRevised date