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 !

Friday, 8 March 2019

SAMSUNG PS50Q7HDX/XEU SERVICE MODE AND TROUBLESHOOTING

SAMSUNG PS50Q7HDX/XEU SERVICE MODE AND TROUBLESHOOTING


SAMSUNG PS50Q7HDX/XEU 

SERVICE MODE AND TROUBLESHOOTING 


How to Access Service Mode
General Remote
To Enter : Power Off >INFO > MENU > MUTE > Power On
(Interval between key strokes : less than 3 sec)
To Exit : Power Off  > On
Factory Remote
To Enter : Power On >INFO >FACTORY Key (Interval between key strokes : less than 3 sec)
To Exit : Power Off >  On
Press the Factory key twice with a key stroke interval of more than 1 second (Pressing once enters Aging Mode)
3. Settings when entering Factory mode
- Sharp Screen (Dynamic), Color Tone (Cool1), Factory (Dynamic CE Off)
4. Adjustment Procedures
# Channel UP/ DOWN Key : Select an item.
# Volume  LEFT/RIGHTKey : Adjust the value up or down.
# MENU Key : Save the changes to the EEPROM and return to the higher-level mode.
# Using the Numeric (0-9) keys, you can select a channel.
# Using the SOURCE key, you can switch AV modes.
White Balance - Calibration
If picture color is wrong, do calibration first.
Execute calibration in Factory Mode
1. Source : VIDEO
2. Setting Mode : PAL Video (MODE : #2)
3. Pattern : Pattern #24 (Chess Pattern)
4. Use Equipment : K-7256 or Equipment of equality level
5. Work order
1) Enter by Factory Mode select "1.CALIBRATION".
2) Select "AV CALIBRATION" again in CALIBRAION MENU.
3) After Completing Calibration, come out "Av success". OSD on the screen (bottom-side) for about 3 seconds.
Source AV : PAL composite, Component : 1280*720/60Hz
PC : 1024*768/60Hz
White Balance - Adjustment
If picture color is wrong, check White Balance condition.
Equipment : CA210, Patten : Toshiba
Adjust W/B in Factory Mode
Sub brightness and R/G/B Offset controls low light region
Sub contrast and R/G/B Gain controls high light region
Source AV : PAL composite, Component : 1280*720/60Hz,
HDMI[DVI] : 1280*720/60Hz
Conditions for Measurement
1. On the basis of toshiba ABL pattern : High Light level (57 IRE)
- INPUT SIGNAL GENERATOR : MSPG-925LTH
* Mode No 2 : 744X484@60 Hz
No 6 : 1280X720@60 Hz
No 21 : 1024X768@60 Hz
* Pattern No 36 : 16 Color Pattern
No 16 : Toshiba ABL Pattern
2. Optical measuring device : CA210 (FL)
Please use the MSPG-925 LTH generator for model PS-50Q7HD
Method of Adjustment
1. Adjust the white balance of AV, Component and DVI Modes.
(AV > Component)
a) Set the input to the mode in which the adjustment will be made (RF >DTV > PC > DVI).
* Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16
# DTV, DVI Mode : Model #6 (1280*720 Mode), Pattern #16
# HDMI Mode : Model #6 (1280*720 Mode), Pattern #16
b) Enter factory color control, confirm the data.
c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)
# Adjust sub - Brightness to set the 'Y' value.
# Adjust red offset ('x') and blue offset ('y') to the color coordinates.
Do not adjust the green gain and sub-contrast (Y) data.
How to Update Flash ROM
1. Installthe Flash Downloader
Connect Set (Service Jack) and Jig Cable to execute Program Update.
2. Flash Downloader program update
# Before Turning on the set, Click "connect" which is under of OSD Screen.
# Turn on the Set.
How to Update DTV Software
1. Software Version Check Method
Press the MENU key and select System.
Where you can find the Prodect Information menu in it.
When you press the Product Information you can find the Software Version.
Connect Set (Service Jack) and Jig Cable to execute Program Update.
2. Serial Download Method
Turn off PDP-TV.
Connect the RS-232 cable to the PDP-TV
Execute the sv2_fr.exe file.
Assign the path of samsung.tvz file (application image)
Execute the progress follow the screen until step 2.
Turn On the PDP-TV.
If the PDP-TV turn on during the sv2_fr.exe execution, it will automatically find the COM port and execute the upgrade.
3. Hyper Terminal Setting
Set the hyper terminal to observe the progress of the TV via the RS-232 cable. Set up hyper terminal.
When setting up a hyper terminal, set it in sub-program.
Enter a new name.
Select a modem port. (com 1 and direct connection.)
Set the bit/second to 115200.
Set the data bit to 8.
No parity bit.
Set stop bit to 1.
No flow control.
Save in memory.
At this point, the new hyper terminal is ready.
4. Resetting the System Parameters
Press the MENU button and select the Reset menu of System.
Press the secret number.
Press the RED, GREEN, YELLOW, BLUE button in order, after the Reset execute.
In a few minutes, DTV will booting again.
TROUBLESHOOTING
No Power
SYMPTOM
The LEDs on the front panel do not work when connecting the power cord.
The SMPS relay does not work when connecting the power cord.
The power of the unit seems to be out of order.
CHECK POINT
The SMPS relay or the LEDs on the front panel do not work when connecting the power cord if the cables are improperly
connected or the Main Board or SMPS is out of order. In this case, check the following:
# Check the internal cable connection status inside the unit.
# Check the fuses of each part.
# Check the output voltage of SMPS.
# Replace the Main Board.
Is the Fuse (F101) of the Main SMPS Power Input Part blown?
Check Main SMPS 804-1 Pin 10 : STB 5V = 5V Pin 8 : PS-ON = 0V
When the unit is repeatedly turned on and off
SYMPTOM
The SMPS relay is repeatedly turned on and off.
CHECK POINT
In general, the SMPS relay repeatedly turns on and off by the protection function due to a defect on a board connected to the SMPS.
# Disconnect all cables from the SMPS, operate the SMPS alone and check if the SMPS works properly and if each voltage output is correct.
# If the symptom continues even when SMPS is operated alone, replace the SMPS.
# If the symptom is not observed when operating the SMPS alone, find any defective ASSYs by connecting the cables one by one.
Does the symptom continue after connecting the power and removing CN809 cable from the Main SMPS? > Does the symptom continue when connecting the power after connecting the CN809 cable and removing the CN2, CN4 and CN5 cables from the DC-DC SMPS? > Replace the DC-DC SMPS
Reconnect all cables. Does the symptom continue when connecting the power after the CN4 cable to the DC-DC SMPS? > Replace the X Main Board
Does the symptom continue when connecting the power after CN2 to the DC-DC SMPS? > Replace the Y Main Board
Does the symptom continue when connecting the power after removing CN810 from the Main SMPS? > Replace the Logic Main Board
Does the symptom continue when separating the CN804-1 and CN803 cables from the Main SMPS and shorting pins 4 and 5 of the CN804-2 Connector? > Replace the Main SMPS
When separating and connecting the cables such as CN809 of the Main SMPS, CN1, CN2, CN3, CN4 and CN5 of DC-DC SMPS, CN of the X Main Board, and CN of the Y Main Board, a spark may be generated by the electric charge of the high capacity capacitor. Therefore, wait some time after separating the power cord from the unit.
No Picture (When audio is normal)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINT
This may happen when the Main Board is normal but the X, Y Main Board, Logic Board, or Y Buffer Boards are out of order.
The output voltage of the Main SMPS or the DC-DC SMPS is out of order.
This may happen when the LVDS cable connecting the Main Board and the Logic Board is disconnected.
Are the Vs and Va voltages normal after removing the CN809 cable from the Main SMPS?
Is the output voltage of the DC-DC SMPS normal when reconnecting the CN809 cable and removing the CN2, CN4 and CN5 cables from the DC-DC SMPS? > Replace the Y Main Board
No Sound
SYMPTOM
Video is normal but there is no sound.
CHECK POINT
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is out of order.
Speaker defect.
Is the cable connection between the Main Board and the speaker properly connected? > Connect the cable properly or replace the cable, if necessary.
Is the output voltage of SMPS normal? (CN803 #5) > Replace the Main SMPS
Is the speaker output terminal of the Main Board normal? > Replace the Speaker
Posted By: FRANK at 05:03
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