Emerson 6420FE Important Safety Precautions, Safety Precautions for TV Circuit, L6115IMP

Page 4

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

Safety Precautions for TV Circuit

1.Before returning an instrument to the custom- er, always make a safety check of the entire instru- ment, including, but not limited to, the following items:

a.Be sure that no built-in protective devices are de- fective and have been defeated during servicing.

(1) Protective shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing protective shields, in- cluding any removed for servicing convenience. (2) When reinstalling the chassis and/or other assem- bly in the cabinet, be sure to put back in place all protective devices, including but not limited to, nonmetallic control knobs, insulating fishpapers, adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not oper- ate this instrument or permit it to be operated without all protective devices correctly in- stalled and functioning. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damage.

b.Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, (1) spac- ing between the picture tube and the cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or incorrectly secured cabinet back cover.

c.Antenna Cold Check - With the instrument AC plug removed from any AC source, connect an electrical jumper across the two AC plug prongs. Place the instrument AC switch in the on position. Connect one lead of an ohmmeter to the AC plug prongs tied together and touch the other ohmme- ter lead in turn to each tuner antenna input ex- posed terminal screw and, if applicable, to the coaxial connector. If the measured resistance is less than 1.0 megohm or greater than 5.2 mego- hm, an abnormality exists that must be corrected before the instrument is returned to the customer. Repeat this test with the instrument AC switch in the off position.

d.Leakage Current Hot Check - With the instru- ment completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leak-

age current tester or a metering system that com- plies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laboratories (UL) 1410, (50.7). With the instrument AC switch first in the on posi- tion and then in the off position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle brackets, metal cabinet, screw heads, metallic overlays, control shafts, etc.), es- pecially any exposed metal parts that offer an elec- trical return path to the chassis. Any current measured must not exceed 0.5 milli-ampere. Re- verse the instrument power cord plug in the outlet and repeat the test.

READING SHOULD

 

 

NOT BE ABOVE 0.5 mA

 

 

 

LEAKAGE

DEVICE

CURRENT

BEING

TESTER

TESTED

+

_

 

TEST ALL EXPOSED

METAL SURFACES

 

ALSO TEST WITH

 

 

PLUG REVERSED

 

 

USING AC

 

EARTH

ADAPTER PLUG

 

AS REQUIRED

 

GROUND

ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES.

e.X-Radiation and High Voltage Limits - Because the picture tube is the primary potential source of X-radiation in solid-state TV receivers, it is special- ly constructed to prohibit X-radiation emissions. For continued X-radiation protection, the replace- ment picture tube must be the same type as the original. Also, because the picture tube shields and mounting hardware perform an X-radiation protection function, they must be correctly in place. High voltage must be measured each time servic-

2-1

L6115IMP

Page 3 Page 5
Image 4
Page 3 Page 5
Contents 6420FE EWF2004 Important Safety Notice Table of ContentsSpecifications Description Condition Unit Nominal LimitDBµv DBµv AFT Pull In Range 10mV input MHz ±2.0 ±0.7Important Safety Precautions Safety Precautions for TV CircuitNot be Above 0.5 mA L6115IMPL6115IMP Precautions during Servicing Clearance Distance Safety Check after ServicingLeakage Current Test How to Remove / Install Flat Pack-IC Standard Notes for ServicingCircuit Board Indications Pb Lead Free SolderWith Iron Wire MachineMasking Flat Pack-IC Tape Tweezers With Soldering IronPin 1 of the Flat Pack-IC Is indicated by a mark InstallationPresolder Instructions for Handling Semiconductors Ground for Human BodyGround for Workbench IncorrectCabinet Disassembly Instructions Disassembly FlowchartDisassembly Method Reference Notes in the TableRear Cabinet Main CBA Rear CabinetCRT TV Cable Wiring Diagram Electrical Adjustment Instructions How to set up the service mode+B Adjustment Service modeInitial Setting GeneralF0 Adjustment Black Stretch Control AdjustmentSD Check Mode Purity CheckPosition Adjustment Size Adjustment10. V. Position Adjustment Software ResetCut-off Adjustment White Balance AdjustmentMode Input Tape SpecFocus Adjustment Sub-Brightness AdjustmentPurity Adjustment Convergence Adjustment FiguresBlock SystemIF/Video Block Diagram L2401BLIFAudio L2401BLABlock Diagram CRT/H.VDiagram L2401BLPStandard Notes Schematic Diagrams / Cbas and Test PointsTolerance of Capacitors are noted with the following Wire Connectors How to read converged linesIs not consistent here Test Point InformationMain 1/4 Schematic Diagram L2401SCM1Main 2/4 Schematic Diagram L2401SCM2Main 3/4 Schematic Diagram L2401SCM3Main 4/4 & CRT Schematic Diagram Main 4/4 Ref No PositionMain CBA Top View BL2700F01012-1Main CBA Bottom View CRT CBA Top View Q1521 Q1521 Collector BaseQ1511 Q1511 Collector Base Q1531 BaseWaveforms WF4WF9 CollectorWiring Diagram L2401WIIC PIN Functions Pin Signal Name FunctionIC111 TV Micro Controller White Balance Adjustment JudgementAFT Voltage Input Degaussing Coil ControlCabinet Exploded Views11-1 11-2 L2401CEX Packing X-2 X-3 Tape Packing Tape 11-3 L2401PEXComparison Chart of Models and Marks Mechanical Parts List20040405 12-1 L2401CA Electrical Parts List 20040405 13-1 L2401EL20040405 13-2 L2401EL Electrolytic CAP .33∝F/50V M CE1JMASDLR33Connectors 20040405 13-3 L2401EL20040405 13-4 L2401EL ICS20040405 13-5 L2401EL Transistor 2SC2120-YTPE220040405 13-6 L2401EL Switches 20040405 13-7 L2401EL20040405 13-8 L2401EL RCA Jack 1P AV-8.4-9W6420FE/EWF2004 L2401UB/L2404UE

6420FE specifications

The Emerson 6420FE is a robust and versatile platform designed for a variety of industrial applications, particularly in process automation, manufacturing, and control systems. This model represents Emerson’s commitment to innovation and performance, catering to the evolving needs of industries that require reliable and accurate control solutions.

One of the main features of the Emerson 6420FE is its advanced processing capability. Equipped with a high-performance processor, the device ensures fast data processing and response times, which are critical in real-time control environments. This allows organizations to optimize their processes, enhance productivity, and improve operational efficiency.

Connectivity is another standout characteristic of the Emerson 6420FE. It supports a range of communication protocols, including Ethernet/IP, Modbus, and others, enabling seamless integration with various devices and systems. This flexibility ensures that the 6420FE can be easily incorporated into existing networks, facilitating smooth data exchange and interoperability among different automation components.

In terms of safety, the Emerson 6420FE is designed with features that ensure compliance with industry standards. It includes built-in redundancy options that enhance operational reliability and minimize downtime. Moreover, the device undergoes rigorous testing to meet safety certifications, providing peace of mind to operators and stakeholders.

The user interface of the Emerson 6420FE is intuitive and user-friendly, featuring an easy-to-navigate design that simplifies configuration and operation. This is paired with advanced diagnostic capabilities, allowing operators to troubleshoot issues effectively and maintain optimal system performance without significant downtime.

Another notable aspect of the Emerson 6420FE is its scalability. Whether in a small application or a large-scale industrial environment, the device can be easily scaled to meet varying demands. This adaptability makes it an ideal solution for companies looking to future-proof their automation systems.

In conclusion, the Emerson 6420FE is a powerful and reliable device that embodies Emerson’s commitment to innovation in process control and automation. With its advanced processing power, versatile connectivity options, robust safety features, user-friendly interface, and scalability, it stands out as an excellent choice for industries looking to enhance their operational efficiencies and ensure streamlined processes. As technology continues to evolve, the Emerson 6420FE remains a cornerstone in automation solutions, driving productivity and reliability in various industrial applications.
Top Page Image Contents