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Samsung QN55Q75CNF User Manual

Samsung QN55Q75CNF
129 pages
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QLED TV
SERVICE
Manual
QLED TV Contents
1. Precautions
2. Product specications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram
QN**Q75CNF
Project : QNQ7CT
Chassis : QWA80
Model : QN55Q75CNF
QN65Q75CNF
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Samsung QN55Q75CNF Specifications

General IconGeneral
Screen Size55 inches
Display TypeQLED
Smart TVYes
Operating SystemTizen
Audio Output20W
HDMI Ports4
USB Ports2
Refresh Rate120Hz
Voice AssistantsBixby, Alexa, Google Assistant
BluetoothYes
Wi-FiYes
HDRHDR10+
Resolution3840 x 2160 (4K UHD)

Summary

Precautions

Safety Precautions

Follow safety, servicing, and ESD precautions to prevent damage and hazards.

Warnings

For continued safety, do not attempt to modify the circuit board.

Servicing the LED TV

Disconnect AC line cord and use an accurate voltage meter when servicing.

Fire and Shock Hazard

Perform safety checks, inspect lead dress, protective devices, and leakage current.

Product Safety Notices

Parts with special safety characteristics are identified by symbols.

Servicing Precautions

Read and follow safety precautions. Electrolytic capacitor polarity can cause explosion.

General Servicing Precautions

Unplug AC cord, disconnect DC jack, reinstall components correctly, check insulation.

Static Electricity Precautions

Protect components from static electricity using grounding and anti-static measures.

Installation Precautions

Follow safety for carrying, power cord placement, ventilation, antenna cable, and batteries.

Product Specifications

Product Information

Provides model, dimensions, and weight details for 55" and 65" models.

Product Specification

Lists detailed specifications for QLED TV, including display, video, audio, and smart features.

Accessories

Lists included accessories like remote, batteries, manual, and One Connect.

Viewing the Functions

Explains smart TV functions like Bixby and the 2018 concept.

2018' Concept

Describes the smart TV experience and its features for entertainment.

Quick Guides

Learn how to use functions like Bixby, Ambient Mode, and Smart Hub.

The Samsung Smart Remote

Details about the Samsung Smart Remote, its buttons, and functions.

Supported Resolutions for UHD Input Signals

Information on supported resolutions for UHD input signals based on HDMI UHD Color settings.

HDMI black level

How to adjust HDMI black level for low levels, contrast, or dull colors.

Supported Formats

Lists supported external/internal subtitles, image formats, and resolutions.

Disassembly and Reassemble

Disassembly

Step-by-step instructions for disassembling the TV, including positioning and cover removal.

One Connect

Describes symptoms and disassembly steps for the One Connect Box.

Troubleshooting

Power

Troubleshooting for power-related issues, including standby and power sequence.

TV POWER STANDBY

Details for TV power standby status and LED indicators.

TV POWER ON SEQUENCE

Explains the power on sequence and related voltages.

Additional Backlight Test

Procedures for testing backlight functionality.

Diagnostic Methods - Flashing Symtom Codes

Identifies defect types and LED flash codes for troubleshooting.

Function Control Operation/Test

Explains function control operations and testing procedures.

Video

Troubleshooting for video problems, including no video and noisy video.

Troubleshooting Video Problems

Steps to diagnose and resolve video issues.

TV MAIN / T-CON

Troubleshooting for Main and T-CON board related video problems.

Audio

Troubleshooting audio problems, including no TV sound and noisy audio.

Network

Troubleshooting network connectivity issues for TV and router.

Smart Hub

Troubleshooting Smart Hub and app related problems.

One Connect

Troubleshooting for One Connect related issues.

OCB POWER ON SEQUENCE TEST

Testing the power on sequence of the One Connect Box.

OCB Self Power Supply Test

Testing the self power supply of the One Connect Box.

TV BACKLIGHT QUICK TEST

Performing a quick test for TV backlight issues.

Bluetooth / WiFi Module

Troubleshooting Bluetooth and WiFi module issues.

Factory Mode

Instructions for entering and using factory mode for adjustments.

Replacing Main Board

Steps and considerations for replacing the main board.

Factory Mode Adjustments

Detailed adjustments available in factory mode.

Entering Factory Mode

Step-by-step guide to enter factory mode using remote controls.

Detail Factory Option

Detailed information on factory options for panel, SMPS, and main boards.

AV Control Tabe

Table of AV control commands for TV settings.

RS-232C

Information on RS-232C control and pin descriptions.

Dimensions

Provides rear view dimensions for 55" and 65" models.

Updating the TV’s Software

Instructions for updating TV software via internet or USB.

Updating the TV’s software to the latest version

Steps for updating TV software to the latest version.

Updating the TV automatically

How to enable and use automatic TV software updates.

Wiring Diagram

Wiring Diagram

Shows the overall wiring diagram for 55" and 65" models.

Connector

Details connector pin maps for main board, one connect board, and SMPS board.

Main Board

Pin map details for the main board connectors.

One Connect Board

Pin map details for the One Connect board connectors.

SMPS Board

Pin map details for the SMPS board connectors.

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