Samsung UA22ES4003R chassis U74H U74G.pdf

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LED TV
Chassis : U74H
Model
: UA22ES4003R
UA32EH400*R
U74G
UA39EH500*R
SERVICE
LED TV
Manual
Contents
1. Precautions
2. Product specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram
UA32EH4003R
Contents
1. Precautions ...................................................................................................................1-1
1-1. Safety Precautions ..............................................................................................................1-1
1-2. Servicing Precautions ..........................................................................................................1-3
1-3. Static Electricity Precautions ...............................................................................................1-4
1-4. Installation Precautions .......................................................................................................1-5
2. Product Specifications.................................................................................................2-1
2-1. Product Information .............................................................................................................2-1
2-2. Detail Factory Option ...........................................................................................................2-7
2-3. Accessories .........................................................................................................................2-8
3. Disassembly and Reassembly ....................................................................................3-1
3-1. Disassembly and Reassembly ............................................................................................3-1
3-2. Assy Board P-Jog Switch & Ir ..............................................................................................3-7
3-3. Disassembly(PTC)...............................................................................................................3-8
4. Troubleshooting ...........................................................................................................4-1
4-1. Troubleshooting ...................................................................................................................4-1
4-2. How to Check Fault Symptom .............................................................................................4-3
4-3. Troubleshooting2 ............................................................................................................... 4-11
4-4. Factory Mode Adjustments ................................................................................................4-13
4-5. White Balance ...................................................................................................................4-14
4-6. White Ratio (Balance) Adjustment .....................................................................................4-17
4-7. RS-232C ............................................................................................................................4-19
4-8. Software Upgrade..............................................................................................................4-20
4-9. Rear Cover Dimension ......................................................................................................4-22
5. Wiring Diagram .............................................................................................................5-1
5-1. Wiring Diagram ....................................................................................................................5-1
5-2. Connector ............................................................................................................................5-4
5-3. Connector Functions ...........................................................................................................5-7
5-4. Cables .................................................................................................................................5-8
This Service Manual is a property of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
© 2012 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea
1. Precautions
1. Precautions
1-1. Safety Precautions
1-1-1. Warnings
For continued safety, do not attempt to modify the circuit board.
WARNING
Disconnect the AC power and DC power jack before servicing.
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1-2. Servicing the LED TV
1.
When servicing the LED TV, Disconnect the AC line cord from the AC outlet.
2.
It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this
meter periodically.
1-1-3. Fire and Shock Hazard
Before returning the monitor to the user, perform the following safety checks:
1.
Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the
chassis and other metal parts in the monitor.
2.
Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and
compartment covers or shields, isolation resistorcapacitor networks, mechanical insulators, etc.
3.
Leakage Current Hot Check:
DEVICE
UNDER
TEST
(READING SHOULD)
NOT BE ABOVE 0.5mA
LEAKAGE
CURRENT
TESTER
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
EARTH
GROUND
Do not use an isolation transformer during this test.
WARNING
Use a leakage current tester or a metering system that complies with American National Standards
Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL
Publication UL1410, 59.7).
4.
With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch first
in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.)
and all exposed metal parts, including: metal cabinets, screwheads and control shafts.
The current measured should not exceed 0.5 milliamp.
Reverse the power-plug prongs in the AC outlet and repeat the test.
1-1
1. Precautions
1-1-4. Product Safety Notices
Some electrical and mechanical parts have special safetyrelated characteristics which are often not evident from visual
inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage,
wattage, etc. Parts that have special safety characteristics are identified by
on schematics and parts lists. A substitute
replacement that does not have the same safety characteristics as the recommended replacement part might create
shock, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever
appropriate.
1-2

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