Electrohelponline: January 2021

Troubleshooting

Check list for initial operation

1. Check the various cable connections first.

- Check to see if there is a burnt or damaged cable.

- Check to see if there is a disconnected or loose cable connection.

- Check to see if the cables are connected according to the connection diagram.

2. Check the power input to the Main Board.

3. How to distinguish if the problem is caused by Main Board or T-CON Board.

- No Video.

If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster than normal booting. [Replace the T-CON Board.]

Distorted Picture: [Check the inner patterns.]

TV POWER STANDBY

1. TV in Standby

√ Standby LED Indicator

2. If Not Lit:

√ AC 120Vac Line

3. If missing:

√ 120Vac Source and Power Cord

4. If OK:

√ Resistance on SMPS Fuse after first removing AC power cord.

5. If fusses are open replace SMPS.

6. If fuses are OK:

√ Standby: A13V (Always On) to Main Board. Should all be approx. 9 VDC

7. If any missing remove the SMPS connector to Main Board .

√ Standby A13V again for 9VDC.

- If OK replace Main Board.

- If still missing replace SMPS.

FUNCTION-IR Control

1. TV in Standby

√ LED Status

2. If LED is OFF

√ LED 1.7Vdc (pin 8)and VCC for 3.3Vdc

• If missing suspect Function Assy/Cable/Main board.

3. If LED is ON

√ Switch Operation activates on screen display.

If missing:

1. Check the STBY voltage from SMPS to Main Board. If STBY is OK suspect Main Board.

2. Check Jog Shuttle 5 SW Operation (Key 1 & Key 2) for command changes. If incorrect suspect a stuck Jog switch which also holds data to Main preventing operation.

3. Check SDA, SCL for effective 3.3Vdc (after power on)

4. Check IR with Standard Remote command changes. (3.3V to 2.5V effective DC)

SMPS POWER

1. Power TV On.

√ PS_ON. 2Vdc (when off) changes to 3.3Vdc (on)

- May already be On if IoT USB is loaded or TV Smart Things Hub mode is active.

2. if voltage error or no change.

√ Jog Function Control Test.

3. If OK replace Main Board.

√ All A13V supplies to full voltage level 12.7VDC.

4. If any wrong voltage, remove the SMPS connector to Main Board.

√ A13V again for 12.7VDC.

5. If OK replace Main Board.

6. If still wrong voltage replace SMPS.

√ OD (Over Voltage Detect) : 3.3Vdc (Operating Normal)

7. If 0V or changing, an SMPS or Panel error exists. Perform Backlight Test.

√ BLU_PWM 0V- Off to approx 1 – 3.3 V pending Backlight dim level

√ If missing/error replace Main Board.

Video: Customer Picture Test

MAIN / T-CON Board: Main Board Section

Video Operation : Generated on Main Section.

1. If OK:

√ Source & Input Cables.

√ Other inputs.

√ One Connect Cable/Box.

2. If Noisy:

√ T-CON Section Test Patterns.

PRE FRC of T-CON Section

Video Operation : Generated at Pre FRC, of T-CON Section.

1. If OK:

√ Main Section.

2. If Noisy:

√ Post FRC Pattern.

POST FRC of T-CON Section

Video Operation : Generated at Post FRC of T-CON Section.

1. If OK:

√ Main / T-CON Board (defective).

2. If Noisy:

√ Mute - 369 - Mute.

T-CON Section

NOTE: May not be available for Larger models over 70 inches.

Video Operation : Generated at T-CON Section.

1. If OK:

√ Main / T-CON Board (defective).

2. If Noisy:

√ Main / T-CON Board.

PANEL

If Noisy:

√ Panel (defective).

AUDIO

No TV Sound

√ Menu → Audio → Speaker Settings set to TV Speaker

• Noisy / Distorted TV Audio

√ Customer Menu → Support → Sound Test

• If Sound Test FAILS : (Missing / Noisy Audio)

√ Speakers (compare resistance/quality)

• Compare audio level out to speakers with multi meter.

√ Replace defective Speakers or Main Board or Cable.

IF Sound Test OK :

√ Audio Source & External Cables.

√ With external Audio Generator (device or App).

√ Other Inputs.

√ One Connect Mini.

Optical Digital Out Errors

√ Red light from Optical Digital Out.

• If missing replace One Connect Mini

No HDMI Audio

√ Source / HDMI Cable & One Connect Mini Connectors.

• Swap with other HDMI Inputs/Sources.

• Perform EDID Write in Factory Mode (Can restore missing HDMI Audio).

√ Bulletins and Latest firmware on TV.

• If not restored replace One Connect Mini/Main.

• Check Audio Format PCM/Dolby based on external Receiver.

ARC Issues

√ HDMI Cable is input to the ARC Designated HDMI port.

√ ARC (HDMI Control) is enabled on the external Receiver.

Bluetooth Audio "Sound Share" Connection Issues

√ Sound Bar is in TV Mode.

• To Connect, Press & Hold Play Button until Sound Bar pairing mode begins.

NETWORK

For Netflix Operation/Connection Issues:
• Check Certificate & Netflix ESN Status in Factory Mode.
- If Certificate and ESN exists, "CO", "NfO", change the DNS to 8.8.8.8
- If Certificate is missing, "C/" replace the TV’s Main Board.
- If ESN number is missing: NF/ do not replace the Main Board.
• Reset TV Clock and check for correct Time & Date. Netflix relies on correct settings.
• Reset Smart Hub. / Reset Apps In Factory Mode.

For Streaming Issues:
• Go to TV Web Browser / Go to speedof.me / testmy.net
√ Check Speed for at least 5 Mbps(HD streaming) / 25 Mbps (4K Streaming).
√ Check Latency for less than 50ms.

WiFi Module pins and details

Go to Menu > Support > Contact Samsung

• If Bluetooth Address or Wireless MAC Address are missing or errors exist.
• BT & Wi-Fi Connector Voltages.
- If Voltages are OK but no BT or Wi-Fi Signals voltage(s), replace defective Module.

Factory Mode Adjustments

Entering Factory Mode
To enter ‘Service Mode’ Press the remote-control keys in this sequence :

Factory Remote
1. Power TV ON.
2. Select TV Source.
3. Info → Factory.
4. Use MENU for return.

Samsung IR Remote (Limited Operation)
1. TV Power Standby.
2. Press as follows.

• Remote Button :

Power OFF > INFO > MENU > MUTE > Power ON

Option (must set Option Bytes when replacing Main Board.)
• Option → Factory Reset (returns TV to out of box condition. Does not reset Apps.)
• SVC → Test Patterns
• SVC → Info → ER Count (Important to check for errors.)
- Resets to 0 with Factory Reset.

First Screen Appearing in Factory Mode (SAMPLE)

Detail Factory Option

[If you replace the main board with new one, please change the factory option as well. The options you must change are "Type".]

HDMI UHD Color
• When you set the HDMI connection to On, the TV turns off and then on automatically.
• The HDMI connection with HDMI UHD Color set to Off supports up to UHD 50P/60P 4:2:0 input signals, while the HDMI connection with HDMI UHD Color set to On supports up to UHD 50P/60P 4:4:4 and 4:2:2 input signals. For more information, refer to "Supported Resolutions for UHD Input Signals.
• Each HDMI connection can be individually optimized for HDMI UHD Color. When you connect the TV to an external device that supports only the UHD 24 or 30 Hz frequency or any FHD frequency, the HDMI UHD Color function may not be available. In this case, set HDMI UHD Color to Off.

HDMI Black Level
• This function is only available when the input signal, connected to the TV via an HDMI connector, is set to RGB444.

Codecs may not function properly if there is a problem with the content data.
• Video content does not play or does not correctly if there is an error in the content or container.
• Sound or video may not work if they have standard bit rates/frame rates above the TV's compatibility.ratings
• If the Index Table is wrong, the Seek(Jump) function does not work.
• When playing video over a network connection, the video may not play smoothly because of datatransmission speeds.
• Some USB/digital camera devices may not be compatible with the player.
• HEVC codec is only available in MKV / MP4 / TS containers.

The items’ colors and shapes may vary depending on the model.
• Cables not included in the package contents can be purchased separately.
• The part code for some accessories may differ depending on your region.

Updating the TV’s Software
View your TV's software version and update it if necessary.

• Settings > Support > Software Update

Updating the TV’s software to the latest version

• Settings Support Software Update Update now

You can update your TV’s software by downloading the update from the Internet directly to your TV or copying the update from a USB device that contains it to your TV.
• Updating from the Internet requires an active Internet connection.
• To update using a USB flash drive, download the update package from Samsung.com to your computer. Then, save the update package in the USB device's top-level folder. Otherwise, the TV will not be able to locate the update package.

[DO NOT turn off the TV’s power until the update is complete. The TV will turn off and on automatically after completing the software update. All video and audio settings return to their default settings after a software update.]

Updating the TV automatically

• Settings Support Software Update Auto Update

If the TV is connected to the Internet, you can have the TV's software update itself automatically while you are watching the TV. When the background update is completed, it is applied the next time the TV is turned on.
• This function may take a longer time if another network function is running concurrently.
• This function requires an Internet connection.
• If you agree to the Smart