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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday 1 March 2019

TOSHIBA 37WL58P – HOW TO ENTER SERVICE MODE – ADJUSTMENTS

Toshiba 37WL58P – How to enter Service Mode – Adjustments

Service mode and adjustments in detail – Toshiba 37WL58P  37” LCD TV.
ENTERING SERVICE MODE
Press the ‘Mute” button once on Remote Control.
Press the ‘Mute’ button again and keep pressing.
While pressing the ‘Mute’ button, press MENU button on TV set.
The Service Mode screen will be displayed.
DISPLAYING THE ADJUSTMENT MENU
Press MENU button on TV.
KEY FUNCTION IN THE SERVICE MODE
Test signal selection : [Power] button (on Remote)
Selection of the adjustment items : Channel ▲/▼  (on TV or Remote)
Change of the data value : Volume ; +/– (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory : CALL + Channel button on TV ▲
Reset the count of operating protect circuit to “00”: CALL + Channel button on TV ▼
“RCUT” selection : 1 button
“GCUT” selection : 2 button
“BCUT” selection : 3 button
“SCNT” selection : 4 button
“COLP” selection : 5 button
“TNTC” selection : 6 button
Color thickness correction
Note: Displayed differently as shown below, depending on the setting of the receiving color
system.
COLP (PAL)
COLC (NTSC)
COLS (SECAM)
Automatic A/D Adjustment(PC, Component) : 7 button
Self diagnostic display ON/OFF : 9 button
[Never try to perform initialization unless you have changed the memory IC.]
SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL UP button in the service mode changes the adjustment items. (DN button for reverse order)
ADJUSTING THE DATA
Pressing of VOLUME ; +/– button will change the value of data in the range from 00H to FFH. The variable range depends on the adjusting item.
EXIT FROM SERVICE MODE
Pressing POWER button to turn off the TV once.
INITIALIZATION OF MEMORY DATA
After replacing EEPROM IC, the following initialization is required.
1. Enter the service mode, then select any register item.
2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV.The initialization of EEPROM IC has been completed.
3. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform “Auto tune” on the owner’s manual.
TEST SIGNAL SELECTION
Every pressing of Power  button on the Remote Control changes the built-in test patterns on screen as described below in SERVICE MODE.  
Never attempt to initialize the data unless EEPROM IC has been replaced.
SELF DIAGNOSTIC FUNCTION
1) Press “9” button on Remote Control during display of adjustment menu in the service mode.  The diagnosis will begin to check if interface among IC’s is executed properly.
2) During diagnosis, the following displays are shown.
Firmware
1. Version information of microprocessor
In case of file name : WL58_EU and Version : 0100 indicates[WL58_EU_0100].
2. Time : Total hour of turn the TV on. (Unit : H)
3. Power :Operation number of protecting circuit ----"000" is normal.
When indication is other than "000", overcurrent apt to flow, and circuit parts may possibly be damaged.
4. Bus line : --"OK" is normal
"SCL-GND"(Red indication) : SCL-GND short circuit
"SDA-GND"(Red indication) : SDA-GND short circuit
"SCL-SDA"(Red indication) : SCL-SDA short circuit
5. Bus cont : --- "OK" is normal.
NG is abnormal (Red indication), when type name of semiconductor indicates.
6. Block
UV : TV reception mode
7. 8 digit : CD number
8. Model name (7 digit)
VERSION CHECK MODE
1) Press “9” button twice on Remote Control during display of adjustment menu in the service mode. The version of main MPU will begin to check.
2) During Version Check, the following displays are shown.
MAIN MPU :
1. Version information of microprocessor
In case of file name : WL58_EU, Version 0100 for Code Program Version and (E16) for OSD Version indicates [WL58_EU_0100(E16)]
2. EEPROM : Version information of EEPROM : Display 1 byte data.
3. SUB MPU : Version information of SUB MPU : Display 1 byte data.
4. OPTION : Option information : Display six numbers of 1 byte data.
5. HDMI ID : HDMI ID information : Display 4 byte data.
6. CD number : Display 8 digit number
7. Model name : Display 7 digit number
8 Panel Vendor information display
The following Panel Vendor and screen size are displayed.
STATUS CHECK MODE
1) Press “9” button thrice on Remote Control during display of adjustment menu in the service mode. The status of this model will begin to check.
2) During Status Check, the following displays are shown.
1. MAIN : Main source information : Display RF position number (0 - 99) on the main screen, or Input Source (EXT1/2/3/HDMI etc.)
2. MAIN FORMAT: Display Video and PC format information
3. MAIN PLL : Main PLL information : Display five numbers of 1 byte data.
4. SCREEN SIZE : Display the screen size as follows.
Super live
Cinema
Subtitle
14:9
Wide
4:3
5. OTHER STATUS : Other status information : Display three numbers of 2 byte data.
Click on the pictures to magnify
Posted By: FRANK at 03:48
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