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........ . . . . . .....
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Saturday, 9 February 2019

SHARP LC-30HV4M _ LC-30HV4X _DISPLAY ADJUSTMENT PROCEDURE

SHARP LC-30HV4M _ LC-30HV4X _Display Adjustment Procedure


See the previous post to know how to enter the adjusting mode, and  follow.




When IC2203 is replaced, it id needed to initialization first then Background adjustment and Common bias adjustment.




  • +B adjustment (LCD Control PWB: R4648)



  1. Receive NTSC standard color bar signal.
  2. Connect digital voltmeter to TP4602 and adjust to the specified value.  Specification: 13.00 ± 0.05V.


  • Common bias adjustment



  1. Make this adjustment each for "50 Hz", "60 Hz" and "PC". Select the input signal according to the indication onscreen.
  2. Go to "Adjustment process mode".
  3. On the LCD, select "14" of "PATTERN 1", dot inversion flicker pattern 2.
  4. Then, select "COM BIAS" on the LCD.
  5. Set the value so that the flicker on the screen is minimized.  Note: Apply this adjustment after for at least 30 min.


  • Background adjustment



  1. Select video standard, and confirm the indication that the unit is preset to the standard.
  2. At video input, receive the window pattern signal having left 80% WHITE (200/255) and right 20% WHITE (48/255).
  3. Set the screen size to the full mode.
  4. Go to "Adjustment process mode".
  5. Adjust "R OFFSET", "G OFFSET" and "B OFFSET" in "SIL861" so that left side 80% WHITE window pattern is set to the specified value.
  6. Adjust "R GAMMA", "G GAMMA" and "B GAMMA" in "SIL861" so that right side 20% WHITE window pattern is set to the specified value.


Specification: x = 0.278, y = 0.274 (80% WHITE), x= 0.259, y = 0.248 (20% WHITE) (LC-30HV4M).  x = 0.283, y = 0.274 (80% WHITE), x= 0.263, y = 0.242 (20% WHITE) (LC-30HV4H).  Note: Apply this adjustment after for at least 30 min.


  • Initialization



Go to "Adjustment process mode".

Select "1" thru "3" of "CLR MODE" in "TEST".  Setting range: 0 Normal.


  1. Initial setting (User clear: Factory setting)
  2. Initial setting (All clear) Full initialization of EEPROM (except for ROM area)
  3. Full initialization of Configuration EEPROM
  4. Move the cursor down by one line.
  5. Press "VOL UP" key and change the display from "WAIT" to "SEND" (write).  Do not shut down power while the display is "SEND".
  6. When the writing is finished, the display changes from "SEND" to "WAIT".


  • Resetting lamp error counter



  1. Go to "Adjustment process mode".
  2. Select "L ERR RESET" in "TEST".
  3. Reset the data to "0".


  • [L ERR RESET]


Function: Reset of fluorescent lamp error counter

It resets the times of fluorescent lamp errors and clears the last value in the memory.

Indication range: 0-5 (Fluorescent lamp errors).  (When lamp error exceeds 5 times, power supply is disabled. Resetting is required in this case.).



ADJUSTING MODE




The controller IC can be adjusted in this mode.

Adjustment is done while controlling the setting of the resistor corresponding to the selected adjustment item.

When monitor is used independently, it is adjusted using the OSD simple display function incorporated in LCD controller.  The OSD function of panel link receiver (SIL861) is used for adjustment of the independent monitor.



ENTRY TO THE MODE



  • When cable is not connected (independent mode), follow the steps below.



  1. When power switch is turned on, press the main unit INPUT and VOL DOWN keys simultaneously.
  2. Press the remote controller's process adjustment key (R/C code: 40h) / process adjustment mode 2 key (R/C code: 31h).


  • When not in independent mode, follow the steps below.



  1. When power switch is turned on, press the main unit CH DOWN and VOL UP keys simultaneously.
  2. Press the remote controller's process adjustment mode 2 key.

EXIT FROM THE MODE



Turn off the power.
Press the remote controller's process adjustment mode 2 key.



DISPLAY


  • First layer display


The third line shows the title. The 5th line and below show the items. Microprocessor's version number appears in the 16th line. [Example) 1.00 * 1 00]



  • Second layer display (Adjustment item display)


A single page shows up to 10 adjustment items (or 14 lines).

The third line shows the title and the screen mode selected in MODE items (only when LCD is selected).

The 5th line shows the item. Microprocessor's version number appears in the 16th line.



CHANGING DATA



  • In "adjustment item display", the items pointed by cursor can be changed using VOL UP/DOWN key.(Holding down the key is effective.)
  • For the items in "LCD DATA", select the item and hit ENTER key. The ten's digit (leftmost digit) in the address changes to red (others in green). Data change using VOL UP/DOWN key is enabled.
  • To move to the next digit, press CH UP key (or rightward cursor key). To go back to the previous digit, press CH DOWN key (or leftward cursor key). Thus, 4 digits data can be entered.

    SHARP LC-30HV4M _ LC-30HV4X _Display Adjustment Procedure





    See the previous post to know how to enter the adjusting mode, and  follow.



    When IC2203 is replaced, it id needed to initialization first then Background adjustment and Common bias adjustment.


  • +B adjustment (LCD Control PWB: R4648)

  1. Receive NTSC standard color bar signal.
  2. Connect digital voltmeter to TP4602 and adjust to the specified value.  Specification: 13.00 ± 0.05V.
  • Common bias adjustment

  1. Make this adjustment each for "50 Hz", "60 Hz" and "PC". Select the input signal according to the indication onscreen.
  2. Go to "Adjustment process mode".
  3. On the LCD, select "14" of "PATTERN 1", dot inversion flicker pattern 2.
  4. Then, select "COM BIAS" on the LCD.
  5. Set the value so that the flicker on the screen is minimized.  Note: Apply this adjustment after for at least 30 min.
  • Background adjustment

  1. Select video standard, and confirm the indication that the unit is preset to the standard.
  2. At video input, receive the window pattern signal having left 80% WHITE (200/255) and right 20% WHITE (48/255).
  3. Set the screen size to the full mode.
  4. Go to "Adjustment process mode".
  5. Adjust "R OFFSET", "G OFFSET" and "B OFFSET" in "SIL861" so that left side 80% WHITE window pattern is set to the specified value.
  6. Adjust "R GAMMA", "G GAMMA" and "B GAMMA" in "SIL861" so that right side 20% WHITE window pattern is set to the specified value.

Specification: x = 0.278, y = 0.274 (80% WHITE), x= 0.259, y = 0.248 (20% WHITE) (LC-30HV4M).  x = 0.283, y = 0.274 (80% WHITE), x= 0.263, y = 0.242 (20% WHITE) (LC-30HV4H).  Note: Apply this adjustment after for at least 30 min.
  • Initialization

Go to "Adjustment process mode".
Select "1" thru "3" of "CLR MODE" in "TEST".  Setting range: 0 Normal.
  1. Initial setting (User clear: Factory setting)
  2. Initial setting (All clear) Full initialization of EEPROM (except for ROM area)
  3. Full initialization of Configuration EEPROM
  4. Move the cursor down by one line.
  5. Press "VOL UP" key and change the display from "WAIT" to "SEND" (write).  Do not shut down power while the display is "SEND".
  6. When the writing is finished, the display changes from "SEND" to "WAIT".
  • Resetting lamp error counter

  1. Go to "Adjustment process mode".
  2. Select "L ERR RESET" in "TEST".
  3. Reset the data to "0".
  • [L ERR RESET]

Function: Reset of fluorescent lamp error counter
It resets the times of fluorescent lamp errors and clears the last value in the memory.
Indication range: 0-5 (Fluorescent lamp errors).  (When lamp error exceeds 5 times, power supply is disabled. Resetting is required in this case.).

ADJUSTING MODE

The controller IC can be adjusted in this mode.
Adjustment is done while controlling the setting of the resistor corresponding to the selected adjustment item.
When monitor is used independently, it is adjusted using the OSD simple display function incorporated in LCD controller.  The OSD function of panel link receiver (SIL861) is used for adjustment of the independent monitor.

ENTRY TO THE MODE
  • When cable is not connected (independent mode), follow the steps below.

  1. When power switch is turned on, press the main unit INPUT and VOL DOWN keys simultaneously.
  2. Press the remote controller's process adjustment key (R/C code: 40h) / process adjustment mode 2 key (R/C code: 31h).
  • When not in independent mode, follow the steps below.

  1. When power switch is turned on, press the main unit CH DOWN and VOL UP keys simultaneously.
  2. Press the remote controller's process adjustment mode 2 key.
EXIT FROM THE MODE

Turn off the power.
Press the remote controller's process adjustment mode 2 key.

DISPLAY
  • First layer display

The third line shows the title. The 5th line and below show the items. Microprocessor's version number appears in the 16th line. [Example) 1.00 * 1 00]
  • Second layer display (Adjustment item display)

A single page shows up to 10 adjustment items (or 14 lines).
The third line shows the title and the screen mode selected in MODE items (only when LCD is selected).
The 5th line shows the item. Microprocessor's version number appears in the 16th line.

CHANGING DATA
  • In "adjustment item display", the items pointed by cursor can be changed using VOL UP/DOWN key.(Holding down the key is effective.)
  • For the items in "LCD DATA", select the item and hit ENTER key. The ten's digit (leftmost digit) in the address changes to red (others in green). Data change using VOL UP/DOWN key is enabled.
  • To move to the next digit, press CH UP key (or rightward cursor key). To go back to the previous digit, press CH DOWN key (or leftward cursor key). Thus, 4 digits data can be entered.
  • When CH UP key is pressed while in rightmost digit, the cursor moves to the leftmost digit. When CH DOWN key is pressed while in leftmost digit, the cursor moves to the rightmost digit.
  • After address data adjustment, press ENTER key to exit from 4-digit adjustment and change the entire "LCD DATA" line to red letters. (Same status as item selection.
DATA UP | DOWN
  • For the item for which OSD display is available, switch the display.
  • Adjust the data with UP/DOWN operation. (Any value beyond the limit is replaced by the limit value.)
  • Output data processing
  • Data transmission for every UP/DOWN operation (Data related to peripheral controller IC)
  • Execution of the last memory data when key is off
  • While the key is held down, the second step is performed approx. 500ms after the key operation and, after this, every single step of UP/DOWN is carried out sequentially at 135ms interval.
CURSOR UP | DOWN
  • Select the adjustment item by pointing it with the cursor.
  • When upward cursor movement is done while the cursor is at the top item, the cursor goes to the bottom item.  (In the case of multiple pages, the cursor goes to the bottom item on the previous page.)
  • When downward cursor movement is done while the cursor is at the bottom item, the cursor goes to the top item. (In the case of multiple pages, the cursor goes to the top item on the next page.)
  • While the key is held down, the second step is performed approx. 500ms after the key operation and, after this, every single step of UP/DOWN is carried out sequentially at 135ms interval.
  • When CH UP key is pressed while in rightmost digit, the cursor moves to the leftmost digit. When CH DOWN key is pressed while in leftmost digit, the cursor moves to the rightmost digit.
  • After address data adjustment, press ENTER key to exit from 4-digit adjustment and change the entire "LCD DATA" line to red letters. (Same status as item selection.

DATA UP | DOWN


  • For the item for which OSD display is available, switch the display.
  • Adjust the data with UP/DOWN operation. (Any value beyond the limit is replaced by the limit value.)
  • Output data processing
  • Data transmission for every UP/DOWN operation (Data related to peripheral controller IC)
  • Execution of the last memory data when key is off
  • While the key is held down, the second step is performed approx. 500ms after the key operation and, after this, every single step of UP/DOWN is carried out sequentially at 135ms interval.

CURSOR UP | DOWN


  • Select the adjustment item by pointing it with the cursor.
  • When upward cursor movement is done while the cursor is at the top item, the cursor goes to the bottom item.  (In the case of multiple pages, the cursor goes to the bottom item on the previous page.)
  • When downward cursor movement is done while the cursor is at the bottom item, the cursor goes to the top item. (In the case of multiple pages, the cursor goes to the top item on the next page.)
  • While the key is held down, the second step is performed approx. 500ms after the key operation and, after this, every single step of UP/DOWN is carried out sequentially at 135ms interval.
Posted By: FRANK at 02:41
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