Emerson 6420FE service manual L6115IMP

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ing is performed that involves B+, horizontal de- flection or high voltage. Correct operation of the X- radiation protection circuits also must be recon- firmed each time they are serviced. (X-radiation protection circuits also may be called "horizontal disable" or "hold down.") Read and apply the high voltage limits and, if the chassis is so equipped, the X-radiation protection circuit specifications giv- en on instrument labels and in the Product Safety

& X-Radiation Warning note on the service data chassis schematic. High voltage is maintained within specified limits by close tolerance safety-re- lated components/adjustments in the high-voltage circuit. If high voltage exceeds specified limits, check each component specified on the chassis schematic and take corrective action.

2.Read and comply with all caution and safety-relat- ed notes on or inside the receiver cabinet, on the receiver chassis, or on the picture tube.

3.Design Alteration Warning - Do not alter or add to the mechanical or electrical design of this TV re- ceiver. Design alterations and additions, including, but not limited to circuit modifications and the ad- dition of items such as auxiliary audio and/or video output connections, might alter the safety charac- teristics of this receiver and create a hazard to the user. Any design alterations or additions will void the manufacturer's warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

4.Picture Tube Implosion Protection Warning - The picture tube in this receiver employs integral implosion protection. For continued implosion pro- tection, replace the picture tube only with one of the same type number. Do not remove, install, or otherwise handle the picture tube in any manner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be kept safely away while picture tubes are handled. Keep the picture tube away from your body. Do not handle the picture tube by its neck. Some "in-line" picture tubes are equipped with a permanently attached deflection yoke; be- cause of potential hazard, do not try to remove such "permanently attached" yokes from the pic- ture tube.

5.Hot Chassis Warning -

a.Some TV receiver chassis are electrically connect- ed directly to one conductor of the AC power cord and maybe safety-serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC power source. To confirm that the AC power plug is inserted correctly, with an AC volt- meter, measure between the chassis and a known

earth ground. If a voltage reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential between the chassis and a known earth ground.

b. Some TV receiver chassis normally have 85V AC(RMS) between chassis and earth ground re- gardless of the AC plug polarity. This chassis can be safety-serviced only with an isolation transform- er inserted in the power line between the receiver and the AC power source, for both personnel and test equipment protection.

c. Some TV receiver chassis have a secondary ground system in addition to the main chassis ground. This secondary ground system is not iso- lated from the AC power line. The two ground sys- tems are electrically separated by insulation material that must not be defeated or altered.

6.Observe original lead dress. Take extra care to as- sure correct lead dress in the following areas:a. near sharp edges,b. near thermally hot parts-be sure that leads and components do not touch ther- mally hot parts,c. the AC supply,d. high voltage, and,e. antenna wiring. Always inspect in all areas for pinched, out of place, or frayed wiring. Check AC power cord for damage.

7.Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced with components, parts, or wir- ing that meet original specifications. Additionally, determine the cause of overheating and/or dam- age and, if necessary, take corrective action to re- move any potential safety hazard.

8.Product Safety Notice - Some electrical and me- chanical parts have special safety-related charac- teristics which are often not evident from visual inspection, nor can the protection they give neces- sarily be obtained by replacing them with compo- nents rated for higher voltage, wattage, etc.. Parts that have special safety characteristics are identi- fied by a ( #) on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The product's safety is under re- view continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are strictly inspected to con- firm they comply with the recognized product safe- ty 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 imple- ment the following precautions when a set is being serviced.

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Contents 6420FE EWF2004 Table of Contents Important Safety NoticeDescription Condition Unit Nominal Limit SpecificationsDBµv DBµv AFT Pull In Range 10mV input MHz ±2.0 ±0.7Safety Precautions for TV Circuit Important Safety PrecautionsNot be Above 0.5 mA L6115IMPL6115IMP Precautions during Servicing Leakage Current Test Safety Check after ServicingClearance Distance Standard Notes for Servicing How to Remove / Install Flat Pack-ICCircuit Board Indications Pb Lead Free SolderMachine With Iron WireMasking Flat Pack-IC Tape Tweezers With Soldering IronPresolder InstallationPin 1 of the Flat Pack-IC Is indicated by a mark Ground for Human Body Instructions for Handling SemiconductorsGround for Workbench IncorrectDisassembly Flowchart Cabinet Disassembly InstructionsDisassembly Method Reference Notes in the TableCRT Rear CabinetRear Cabinet Main CBA TV Cable Wiring Diagram How to set up the service mode Electrical Adjustment Instructions+B Adjustment Service modeGeneral Initial SettingBlack Stretch Control Adjustment F0 AdjustmentSD Check Mode Purity CheckSize Adjustment Position Adjustment10. V. Position Adjustment Software ResetWhite Balance Adjustment Cut-off AdjustmentMode Input Tape SpecPurity Adjustment Sub-Brightness AdjustmentFocus Adjustment Figures Convergence AdjustmentSystem BlockL2401BLIF IF/Video Block DiagramL2401BLA AudioCRT/H.V Block DiagramL2401BLP DiagramTolerance of Capacitors are noted with the following Schematic Diagrams / Cbas and Test PointsStandard Notes How to read converged lines Wire ConnectorsIs not consistent here Test Point InformationL2401SCM1 Main 1/4 Schematic DiagramL2401SCM2 Main 2/4 Schematic DiagramL2401SCM3 Main 3/4 Schematic DiagramMain 4/4 Ref No Position Main 4/4 & CRT Schematic DiagramBL2700F01012-1 Main CBA Top ViewMain CBA Bottom View Q1521 Q1521 Collector Base CRT CBA Top ViewQ1511 Q1511 Collector Base Q1531 BaseWF4 WaveformsCollector WF9L2401WI Wiring DiagramIC111 TV Micro Controller Pin Signal Name FunctionIC PIN Functions Judgement White Balance AdjustmentAFT Voltage Input Degaussing Coil Control11-1 11-2 L2401CEX Exploded ViewsCabinet X-2 X-3 Tape Packing Tape 11-3 L2401PEX Packing20040405 12-1 L2401CA Mechanical Parts ListComparison Chart of Models and Marks 20040405 13-1 L2401EL Electrical Parts ListElectrolytic CAP .33∝F/50V M CE1JMASDLR33 20040405 13-2 L2401EL20040405 13-3 L2401EL ConnectorsICS 20040405 13-4 L2401ELTransistor 2SC2120-YTPE2 20040405 13-5 L2401EL20040405 13-6 L2401EL 20040405 13-7 L2401EL SwitchesRCA Jack 1P AV-8.4-9W 20040405 13-8 L2401EL6420FE/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.
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