REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 9 March 2019

SHARP LC-39LE155M LED BACK LIGHT TV SERVICE MODE TROUBLE SHOOTING AND SOFTWARE UPDATE

SHARP LC-39LE155M LED BACK LIGHT TV SERVICE MODE TROUBLE SHOOTING AND SOFTWARE UPDATE


SHARP LC-39LE155M 

LED BACK LIGHT TV 

SERVICE MODE TROUBLE SHOOTING AND SOFTWARE UPDATE 


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.
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.
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.
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.
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.
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.
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
White Balance Adjustment
CONDITION
Backlight : MAX
AV Mode : DYNAMIC
Active Backlight : OFF
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.
Panel Contrast
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 
(26) Shut down the AC power.
#Initial value at RGB 2 point : 3664
#Initial value at RGB 1 point : 1008
Posted By: FRANK at 02:40
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