Category: LED Television Repair and Service
Contents of this article
- How to access service mode
- Troubleshooting
- White balance adjustment
SHARP LC-39LE155M
ADJUSTMENT PROCEDURE
Entering and cancel the adjustment process mode
1) While holding down the INPUT and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K” standing for inspection process mode is displayed on the upper left position of the screen.)
2) Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)
3) To cancel it, turn off the power using the Power switch or remote control.
Entering and cancel the adjustment process mode
1) While holding down the INPUT and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K” standing for inspection process mode is displayed on the upper left position of the screen.)
2) Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)
3) To cancel it, turn off the power using the Power switch or remote control.
3. Software upgrading.
1) Plug off the LCD TV.
2) Insert the USB device to the USB terminal at the LCD TV. (Make sure that the latest software is installed in the USB device).
3) Hold the LCD TV power key and plug on the LCD TV.
4) LCD TV is on and detecting the USB device.
5) A few seconds later, LED light ( o r a n g e) will blink indicating the software upgrading.
7) T V will automatically restart whens oftware is successfully installed
8) LCD TV is running with the latest software.
1) Plug off the LCD TV.
2) Insert the USB device to the USB terminal at the LCD TV. (Make sure that the latest software is installed in the USB device).
3) Hold the LCD TV power key and plug on the LCD TV.
4) LCD TV is on and detecting the USB device.
5) A few seconds later, LED light ( o r a n g e) will blink indicating the software upgrading.
7) T V will automatically restart whens oftware is successfully installed
8) LCD TV is running with the latest software.
TROUBLESHOOTING
NO POWER
No power (front LED failure to light up) or no startup (front LED failure to turn from red to green)
Are the wire harnesses and other cables properly connected in the set? > Reconnect the wire harnesses and other cables properly in the set.
Is there the AC_CTRL and PNL_POWER signal input at pins (126) and (127) of IC3301? > Check the AC_CTRL signal line PNL_POWER signal line.
Are the DC/DC converter outputs and the output voltages along the control lines as specified?
1) M+5.6V (IC9603)
2) D+1.26V (IC9605)
3) D+5V (IC9610)
4) T+5V (IC9612)
5) D+3.3V (IC9608)
6) D+1.8V (IC9609)
7) D+2.5V (IC9611) > Check the DC/DC converters and the control lines. Replace defective parts as required.
2) D+1.26V (IC9605)
3) D+5V (IC9610)
4) T+5V (IC9612)
5) D+3.3V (IC9608)
6) D+1.8V (IC9609)
7) D+2.5V (IC9611) > Check the DC/DC converters and the control lines. Replace defective parts as required.
NO VIDEO RF
Is there IF output from the tuner pin(10) of TU1101 as specified? > Check TU1101 and its peripheral circuits.
Is there VIF input at pin 74 & 75 of IC3301? > Check the circuit between TU1101 & IC3301.
Is there VIF input at pin 74 & 75 of IC3301? > Check the circuit between TU1101 & IC3301.
Are there the signal outputs (pin 100-107, 109,110) of IC3301? > Check IC3301 and its peripheral circuit.
Check LVDS cable, LCD controller (incl. panel) and their peripheral circuits.
NO VIDEO ON COMPONENT
Is INPUT 3 selected on the input select menu screen? > Select INPUT 3 on the input select menu screen to pick up the right input signal.
Are there the Y, Pb and Pr signal inputs at pins (34), (36) and (38) of IC3301 respectively? > Check the line between pins (19)/(17)/(15) of J502 and pins (34)/ (36)/(38) of IC3301.
Are there the signal outputs (pin 100-107, 109,110) of IC3301? > Check IC3301 and its peripheral circuits.
Check LVDS cable, LCD controller (incl. panel) and their peripheral circuits.
NO VIDEO COMPOSITE
Is INPUT 2 selected on the input select menu screen? > Select INPUT 2 on the input select menu screen to pick up the right input signal.
Is there the video signal input at pin (43) of IC3301? > Check the line between pin (9) of J502 and pin (43) of IC3301.
Are there the signal outputs (pin 100-107, 109,110) of IC3301? > Check IC3301 and its peripheral circuits.
Check LVDS cable, LCD controller (incl. panel) and their peripheral circuits.
NO VIDEO HDMI
Is INPUT 1 selected on the menu screen? > Select INPUT 1 on the input select menu screen to pick up the right signal input.
Are there signal outputs from SC1501 to IC3301? > Check peripheral circuits between SC1501 and IC3301.
Are there the signal outputs (pin 100-107, 109,110) of IC3301? > Check IC3301 and its peripheral circuits.
Check LVDS cable, LCD controller (incl. panel) and their peripheral circuits.
NO AUDIO
Is the IF output from the tuner pin (8),(9) of TU1101 as specified? > Check TU1101 and its peripheral circuits.
Is there the SIF signal input at pins (R6 ), (T6 ) of IC3301? > Check IC3301 and its peripheral circuits.
Is there audio signal intput at pin(4),(10) of IC1701? > Check connection between IC3301 and IC1701 and its
peripheral circuits.
peripheral circuits.
Is the L-ch audio signal output at pin((27), (29) of IC1701 normal?
Is the R-ch audio signal output at pin(21), (23) of IC1701 normal? > Check IC1701 and its peripheral circuits.
Is the R-ch audio signal output at pin(21), (23) of IC1701 normal? > Check IC1701 and its peripheral circuits.
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of P1701 normal? Check circuit between IC1701 & P1701.
Check speakers and their peripheral circuits.
Factory setting
1. Setting is done with test remote control.
2. Press the ‘Factory Setting’ key on the remote control continuously.
3. When Green background appears on screen and ‘K’ mark disappears, settingng is completed.
2. Press the ‘Factory Setting’ key on the remote control continuously.
3. When Green background appears on screen and ‘K’ mark disappears, settingng is completed.
The followings are initialised to factory setting
1) User setting
2) Channel data (e.g. broadcast frequencies)
3) Manufacturer’s option settings
4) Password data
5) Setting values are set based on model destination
1) User setting
2) Channel data (e.g. broadcast frequencies)
3) Manufacturer’s option settings
4) Password data
5) Setting values are set based on model destination
White Balance Adjustment
CONDITION
Backlight : MAX
AV Mode : DYNAMIC
AV Mode : DYNAMIC
Active Backlight : OFF
Set the luminance meter on the centre of the screen
Set the luminance meter on the centre of the screen
PROCEDURE
For the details of white balance adjustment procedure, please refer to white balance adjustment spec for Kameyama model.
1. Confirm the set condition.
2. Connect the white balance jig.
3. Through RS-232C command, adjustment mode screen is displayed.
1. Confirm the set condition.
2. Connect the white balance jig.
3. Through RS-232C command, adjustment mode screen is displayed.
Panel Contrast
R/G/B_MAX
R/G/B_HIGH
R/G/B_LOW
R/G/B_MAX
R/G/B_HIGH
R/G/B_LOW
(1) Measurement MAX Brightness
(2) Set MIN Brightness
(3) Measurement HIGH Brightness
(4) Measurement LOW Brightness
(5) Calculation H γ
(6) Calculation Lγ
(7) Calculation HIGH luminance (γ=2.2)
(8) Calculation Initial setting of R/G/B_HIGH
(9) Set Initial setting of R/G/B_HIGH
(10) Original WB adjustment is performed (HIGH)
Set the specified gradation for point 2, fix the most faint colour to get reference value,
adjust others 2 colours to minus adjustment for reference value of point 2.
(11) Measurement HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
(12) Calculation MAX luminance after WB ADJ set to γ=2.2 (L XHG)
(13) Set R/G/B_MAX
(14) Calculation LOW luminance (γ=2.2)
(15) Calculation Initial setting of R/G/B_LOW
(16) Set Initial setting of R/G/B_LOW
(17) Original WB adjustment is performed (LOW). Set the specified gradation for point 1. Set G of point 1 to the default value [(R1 x G value of point 2/R2), with fractions rounded] and adjust RB to the reference value of point 1.
(18) Adjusted value is writing at [command] MSET0003
(19) Set the G of point Max. to the default value (4080 x G value of point 2 / R2). Set the R,B Max. value [Gmax – G value of point 2 + (R,B value of point 2)
(20) Calculate the slope R2slope, G2slope, B2slope
between MAX and Point2. R2slope =
(Rmax - Rhigh )/(4080-3664)
(21) Calculate the correction value Rhigh, G high, Bhigh. Rhigh = R2slope X (3840-3664)
(22) Set the reference value R,G,B of point 2
(R2’)=R2+Rhigh
(23) Calculate the slope R1slope, G1slope, B1slope between Point2 and Point1. R1slope =
(Rhigh - Rlow )/(3664-1008)
(24) Calculate the correction value Rlow,Glow, Blow.R low = R1slope X (1130-1008)
(25) Set the reference value R,G,B of point 1
(R1’)=R1+Rlow
(2) Set MIN Brightness
(3) Measurement HIGH Brightness
(4) Measurement LOW Brightness
(5) Calculation H γ
(6) Calculation Lγ
(7) Calculation HIGH luminance (γ=2.2)
(8) Calculation Initial setting of R/G/B_HIGH
(9) Set Initial setting of R/G/B_HIGH
(10) Original WB adjustment is performed (HIGH)
Set the specified gradation for point 2, fix the most faint colour to get reference value,
adjust others 2 colours to minus adjustment for reference value of point 2.
(11) Measurement HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
(12) Calculation MAX luminance after WB ADJ set to γ=2.2 (L XHG)
(13) Set R/G/B_MAX
(14) Calculation LOW luminance (γ=2.2)
(15) Calculation Initial setting of R/G/B_LOW
(16) Set Initial setting of R/G/B_LOW
(17) Original WB adjustment is performed (LOW). Set the specified gradation for point 1. Set G of point 1 to the default value [(R1 x G value of point 2/R2), with fractions rounded] and adjust RB to the reference value of point 1.
(18) Adjusted value is writing at [command] MSET0003
(19) Set the G of point Max. to the default value (4080 x G value of point 2 / R2). Set the R,B Max. value [Gmax – G value of point 2 + (R,B value of point 2)
(20) Calculate the slope R2slope, G2slope, B2slope
between MAX and Point2. R2slope =
(Rmax - Rhigh )/(4080-3664)
(21) Calculate the correction value Rhigh, G high, Bhigh. Rhigh = R2slope X (3840-3664)
(22) Set the reference value R,G,B of point 2
(R2’)=R2+Rhigh
(23) Calculate the slope R1slope, G1slope, B1slope between Point2 and Point1. R1slope =
(Rhigh - Rlow )/(3664-1008)
(24) Calculate the correction value Rlow,Glow, Blow.R low = R1slope X (1130-1008)
(25) Set the reference value R,G,B of point 1
(R1’)=R1+Rlow
(26) Shut down the AC power.#Initial value at RGB 2 point : 3664#Initial value at RGB 1 point : 1008
