Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_ML027C_L23W36_[SM]
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PRODUCT SAFETY
IMPORTANT SAFETY NOTICE 1. Immediately before handling any semiconductor component or
This manual was prepared for use only by properly trained audiovisual service semiconductor-equipped assembly, drain off any electrostatic charge on the
technicians. When servicing this product, under no circumstances should the body by touching a known earth ground. Alternatively, obtain and wear a
original design be modified or altered without permission from Zenith commercially available discharging wrist strap device, which should be
Electronics Corporation. All components should be replaced only with types removed for potential shock reasons prior to applying power to the unit under
identical to those in the original circuit and their physical location, wiring, and test.
lead dress must conform to original layout upon completion of repairs. If any 2. After removing an electrical assembly equipped with ES devices, place the
fuse (or Fusible Resistor) in this TV receiver is blown, replace it only with the assembly on a conductive surface such as an ESD mat, to prevent
factory specified fuse type and rating. When replacing a high wattage resistor electrostatic charge buildup or exposure of the assembly.
(Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
Always keep wires away from high voltage or high temperature parts. 4. Use only an anti-static solder removal device. Some solder removal devices
not classified as "anti-static" can generate electrical charges sufficient to
Special components are also used to prevent shock and fire hazard. damage ES devices.
These components are indicated by the letter "x" included in their component 5. Do not use freon-propelled chemicals. These can generate electrical charge
designators and are required to maintain safe performance. No deviations are sufficient to damage ES devices.
allowed without prior approval by Zenith Electronics Corporation. Service work 6. Do not remove a replacement ES device from its protective package until
should be performed only after you are thoroughly familiar with these safety immediately before you are ready to install it. (Most replacement ES devices
checks and servicing guidelines. are packaged with leads electrically shorted together by conductive foam,
aluminum foil, or comparable conductive material.)
Circuit diagrams may occasionally differ from the actual circuit used. 7. Immediately before removing the protective material from the leads of a
This way, implementation of the latest safety and performance improvement replacement ES device, touch the protective material to the chassis or circuit
changes into the set is not delayed until the new service literature is printed. assembly into which the device will be installed.
CAUTION: Do not attempt to modify this product in any way. Caution: Be sure no power is applied to the chassis or circuit, and observe
Never perform customized installations without manufacturer's all other safety precautions.
approval.
Unauthorized modifications will not only void the warranty, but may 8. Minimize bodily motions when handling unpackaged replacement ES
lead to property damage or user injury. devices. (Otherwise, seemingly harmless motion, such as the brushing
together of your clothing or the lifting of your foot from a carpeted floor, can
generate static electricity sufficient to damage an ES device.)
GENERAL GUIDANCE
An lsolation Transformer should always be used during the servicing
of a receiver whose chassis is not isolated from the AC power line. Use a REGULATORY INFORMATION
transformer of adequate power rating to protect against personal injury from This equipment has been tested and found to comply with the limits for a Class
electrical shocks. It will also protect the receiver and its components from being B digital device, pursuant to Part 15 of the FCC Rules.
damaged by accidental shorts of the circuitry that may be inadvertently These limits are designed to provide reasonable protection against harmful
introduced during the service operation. interference when the equipment is operated in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not
Before returning the receiver to the customer, always perform an AC leakage installed and used in accordance with the instruction manual, may cause
current check on the exposed metallic parts of the cabinet, such as antennas, harmful interference to radio communications. However, there is no guarantee
terminals, etc., to be sure the set is safe to operate that interference will not occur in a particular installation. If this equipment does
without damage of electrical shock. cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures: Reorient
LEAKAGE CURRENT COLD CHECK or relocate the receiving antenna; Increase the separation between the
(ANTENNA COLD CHECK) equipment and receiver; Connect the equipment into an outlet on a circuit
With the instrument's AC plug removed from AC source, connect an electrical different from that to which the receiver is connected; Consult the dealer or an
jumper across the two AC plug prongs. Place the AC switch in the on position, experienced radio/TV technician for help.
connect one lead of ohm-meter to the AC plug prongs tied together, and touch
other ohm-meter lead in turn to each exposed metallic parts such as antenna The responsible party for this device's compliance is:
terminals, phone jacks, etc. If the exposed metallic part has a return path to the
chassis, the measured resistance should be between 1M and 5.2M. When Zenith Electronics Corporation
the exposed metal has no return path to the chassis the reading must be 201 James Record Road
infinite. Any other abnormality that exists must be corrected before Huntsville, AL 35824, USA
the receiver is returned to the customer. Digital TV Hotline: 1-877-993-6484
ELECTROSTATICALLY SENSITIVE DEVICES
Some semiconductor (solid-state) devices can be damaged easily by static
electricity. Such components commonly are called Electrostatically Sensitive
(ES) Devices. Examples of typical ES devices are integrated circuits and some
field-effect transistors and semiconductor "chip" components. The following
techniques should be used to help reduce the incidence of component damage
caused by static electricity.
- 2 -
TABLE OF CONTENTS
SPECIFICATIONS.................................................................4
DESCRIPTION OF CONTROLS ...........................................5
ADJUSTMENT INSTRUCTIONS ..........................................7
TROUBLESHOOTING ........................................................10
PRINTED CIRCUIT BOARD ...............................................11
BLOCK DIAGRAM...............................................................15
EXPLODED VIEW...............................................................16
EXPLODED VIEW PARTS LIST .........................................17
REPLACEMENT PARTS LIST ............................................18
SCHEMATIC DIAGRAM..........................................................
- 3 -
SPECIFICATIONS
MODEL L23W36
Width (inches) 23.6
Height (inches) 20.6
Depth (inches) 8.1
Weight (pounds) 22
Power Requirement AC100-240V ~ 60Hz
Television System NTSC
Television Channel VHF : 2 ~ 13, UHF : 14 ~ 69, Cable : 01 ~ 125
Television Screen LCD Panel
External Antenna Impedance 75
Audio Output 7W+7W
- 4 -
DESCRIPTION OF CONTROLS
Controls & Connection Options
ch
Channel Buttons
vol Volume Buttons
enter Enter Button
ST
MONO SAP DPM
STEREO menu Menu Button
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