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

FUNAI LED40-H9825M SERVICE MODE TROUBLE SHOOTING AND POWER SUPPLY CIRCUIT

FUNAI LED40-H9825M SERVICE MODE TROUBLE SHOOTING AND POWER SUPPLY CIRCUIT


FUNAI LED40-H9825M 

SERVICE MODE TROUBLE SHOOTING AND POWER SUPPLY CIRCUIT 


How to set up the service mode
Service mode
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Software” in “OTHERS” and press [OK] button.
4. Press [0], [4], [2], [5], [7], [4] and [ ] buttons on the remote control unit in this order.
Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time the [7] button on the remote control unit is pressed, the display changes
3. To cancel or to exit from the Purity Check Mode, press [BACK] button
White Balance Adjustment
The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA.
Purpose: To mix red and blue beams correctly for
pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 60 minutes.
2. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.
6. Press [MENU] button. The internal Raster signal appears on the screen. (“Internal (Single)” appears on the upper right of the screen.
7. Press [P UP/DOWN ] buttons to adjust the color temperature becomes 12000°K
(x= 0.272 / y= 0.278 ±0.002).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears on the screen.) and press [P UP/DOWN ] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears on the screen.) and press [P UP/DOWN ] buttons to adjust the color temperature.
11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears on the screen.) and press [P UP/DOWN ] buttons to adjust the color temperature.
12. If necessary, adjust the “LDB” or “LDR” again.
13. Press [BACK] button to enter the Service mode again.
14. Press [ INFORMATION (i)] button on the remote control unit to shift to the self check mode screen. If “WB OK” is displayed, this adjustment completes.
If “WB NG” is displayed, turn the AC switch (on the lower left of the back of the unit) off and on. Then  repeat above steps from 3. to 13. Check the self check mode screen again. If “WB NG” is displayed, replace the LCD Panel or Digital Main CBA.
15. To cancel or to exit from the White Balance Adjustment, press [BACK] button.
LCD TELEVISION INITIALIZING
How to initialize the LCD television
1. Turn the power on.
2. Enter the service mode.
To cancel the service mode, press [ POWER ] button on the remote control unit.
3. Press [ INFORMATION (i)] button on the remote control unit to
initialize the LCD television.
4. After confirming that “INITIALIZED : OK” appears on the screen, turn the AC switch (on the lower left of the back of the unit) off.
FIRMWARE UPDATE
Equipment Required
a. USB storage device
b. Remote Control Unit
Firmware Update Procedure
[Check the current version]
1. Press [MENU] button on the remote control unit to display the menu mode.
2. Press [UP ] or [DOWN] to select “Others”, then press [OK] button.
3. Press [UP] or [DOWN] to select “Software”, then press [OK] button.
The current FW version will be displayed.
[Preparation]
1. Prepare USB storage device.
2. Copy F/W-file (pkg file) to USB storage device.
Note: Make sure to use the blank USB Storage.
3. Rename the F/W-file’s name to “upgrade.pkg”.
[Update procedure]
1. Turn the AC switch (on the lower left of the back of
the unit) off.
2. Insert USB storage device with F/W to TV set.
3. Turn the AC switch on.
4. Updating starts automatically. Red LED flashes.
Note: Do not turn off the TV set and do not remove the USB storage device while this
procedure.
5. When updating is completed, the TV set will turn back on automatically.
6. To shift the TV set to standby mode, press [POWER ] button on the remote control unit.
7. Remove USB storage device from TV set.
8. Press [POWER ] button again to turn the power on.
9. Press [MENU] button on the remote control unit to display the menu mode.
10. Select “Parental” - “PIN CODE:”.
11. Press [4], [7], [3] and [7] buttons on the remote control unit.
12. Select “Factory Reset” and press [OK] button.
TROUBLE SHOOTING
The power cannot be turned on.
Are the voltage of each pin of CN2602 and CN2603 become as shown below
CN2603 > 3, 4PIN > +24V, AMP+24V
CN2602 > 11-14PIN > +12V ,P-ON+12V
CN2602 > 6PIN > +5.3V ,AL+5.3V
 >>>Check SW601 and their periphery circuit, and service it if defective. Or replace Power Supply CBA Unit.
Check for short-circuiting or leak on the load circuit, and service it if defective.
P-ON+3.3V is not output.
Is approximately 12V voltage supplied to Pin(2) of IC2602 > Check F2603, P-ON+12V line and their periphery circuit, and service it if defective.
Replace IC2603.
P-ON+5V is not output.
Is approximately 6V voltage supplied to Pin(4) of IC2605 > Replace IC2605.
The key operation is not functioning.
Are the contact point and installation state of the key switches (SW2150-SW2156) normal > Re-install the switches (SW2150-SW2156) correctly or replace the poor switch.
When pressing each switches (SW2150-SW2156) do the voltage of Pin(1) on CN2104 decrease > Check the switches (SW2150-SW2156) and their periphery, and service it if defective.
Replace Digital Main CBA Unit.
POWER SUPPLY CIRCUIT  
CLICK ON THE IMAGE TO ZOOM IN
Posted By: FRANK at 05:17
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