Service Manuals, User Guides, Schematic Diagrams or docs for : RCA LCD RCA_BD20TF10_F19426_F19436_F20TF10_TVD809_SafetyPre_[SM]

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RCA_BD20TF10_F19426_F19436_F20TF10_TVD809_SafetyPre_[SM]


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TX_TVD809                                                                                                                                                                               TX_TVD809
11/03                                                                                                                                                                                   SAFETY PRECAUTIONS
                                                                                                                                                                            TX_TVD809   DO NOT OPERATE THIS INSTRUMENT OR PERMIT IT TO BE OPER-                                   Do not remove, install, or otherwise handle the picture tube in any manner with-
                                                                                                                                                                                        ATED WITHOUT ALL PROTECTIVE DEVICES INSTALLED AND                                         out first putting on shatterproof goggles equipped with side shields. People not so
                                                                                                                                                                                        FUNCTIONING. SERVICERS WHO DEFEAT SAFETY FEATURES OR                                      equipped must be kept safely away while picture tubes are handled. Keep the
                                                                                                                                                                 F20TF10, F19425        FAIL TO PERFORM SAFETY CHECKS MAY BE LIABLE FOR ANY                                       picture tube away from your body. Do not handle the picture tube by its neck.

Television                                                                                                                                                  F19426, F19431, F19436
                                                                                                                                                                                        RESULTING DAMAGE, AND MAY EXPOSE THEMSELVES AND OTH-
                                                                                                                                                                                        ERS TO POSSIBLE INJURY.
                                                                                                                                                                                                                                                                                  Some "in-line" picture tubes are equipped with a permanently attached deflection
                                                                                                                                                                                                                                                                                  yoke; because of potential hazard, do not try to remove such "permanently at-
                                                                                                                                                                                                                                                                                  tached" yokes from the picture tube.
                                                                                                                                                             BD20TF10, 13V110TD         READ AND COMPLY WITH ALL CAUTION AND SAFETY-RELATED

Basic Service Data                                                                                                                                                                      NOTES ON OR INSIDE THE RECEIVER CABINET, AND THE RE-
                                                                                                                                                                                        CEIVER CHASSIS, OR ON THE PICTURE TUBE.
                                                                                                                                                                                                                                                                                  X-RADIATION AND HIGH VOLTAGE LIMITS - Because the picture
                                                                                                                                                                                                                                                                                  tube is the primary source of X-radiation in solid-state TV receivers, it is specially
                                                                                                                                                                                                                                                                                  constructed to prohibit X-radiation emissions. For continued X-radiation protec-
                                                                                                                                                                                        SAFETY GLASSES SHOULD BE USED WHEN SERVICING ELEC-
                                                                                                                                                                                        TRONIC INSTRUMENTS. INADVERTENTLY OVERSTRESSING COM-                                      tion, a replacement picture tube must be the same type as the original. The picture
                                                                                                                                                                                        PONENTS MAY CAUSE THEM TO SHATTER, DISCHARGING SMALL                                      shields, mounting hardware and lenses (projection TV) may also perform an X-
                                                                                 Technical Publications                                                                                 PARTICLES.                                                                                radiation protection function, and they must be correctly in place. Anode connec-
                                                                             P.O.Box 1976 / Indianapolis, Indiana 46206                                                                                                                                                           tors contain an X-radiation shield - use only the manufacturer's specified anode
                                                                                                                                                                                        DESIGN ALTERATION WARNING - Do not alter or add to the mechanical or                      connectors. High voltage must be measured each time servicing that involves
                                                                                                                                                                                        electrical design of this TV receiver. Design alterations and additions may alter         power supply, horizontal deflection or high voltage circuits is performed. Correct
                                                                                                                                                                                        the safety characteristics of this receiver and create a hazard to the user. Design       operation of the X-radiation circuits must also be confirmed each time these cir-
                                                                                                                                                                                        alterations or additions may void the manufacturer's warranty and may make you,           cuits are serviced (X-radiation circuits may also be called "horizontal disable" or
                                                                    SERVICE DATA INDEX                                                                                                  the servicer, responsible for personal injury or property damage resulting there-
                                                                                                                                                                                        from.
                                                                                                                                                                                                                                                                                  "hold-down" circuits). Read and apply high voltage limits and, if the chassis is so
                                                                                                                                                                     Page                                                                                                         equipped, the X-radiation protection circuit specifications. These limits and speci-
                                                                                                                                                                                        BEFORE RETURNING AN INSTRUMENT TO THE CUSTOMER, always                                    fications are given on instrument labels and are included in this service data. High
                                                                                                                                                               Number                   make a safety check of the entire instrument, including, but not limited to, the          voltage is maintained within specified limits by close-tolerance safety-related com-
                           Electrical Alignment Procedures ......................................................................................                     3-1               following items:                                                                          ponents (and adjustments) in the high voltage circuit. If high voltage exceeds
                           Block Diagrams                                                                                                                                               FIRE AND SHOCK HAZARD                                                                     specified limits, check each safety related component specified on the schematic
                             Interconnect Diagram (TX809) .......................................................................................                     8-1                                                                                                         and take corrective action.
                                                                                                                                                                                          1. Never release a repaired unit unless all protective devices such as insula-
                             Interconnect Diagram (TVD809) ....................................................................................                       8-2                    tors, barriers, covers, strain reliefs and other protective hardware have been       ANTENNA LEAKAGE RESISTANCE CHECK - With the instrument AC
                           Circuit Boards ....................................................................................................................       10-1                    installed in accordance with the original design.                                    plug removed from the AC source, connect an electrical jumper across the two AC
                                                                                                                                                                                                                                                                                  plug prongs. Place the instrument AC switch (if applicable) in the "on" position.
                           Disassembly                                                                                                                                                    2. Be sure that there are no cabinet openings through which an adult or a child         Connect one lead of an ohmmeter to the AC plug prongs and touch the other
                             Instrument Disassembly ..................................................................................................                2-1                    might be able to insert their fingers and contact a hazardous voltage. Such          ohmmeter lead, in turn, to each (exposed) antenna input terminal screw and/or
                             Component Removal .......................................................................................................                2-2                    openings include, but are not limited to: (a) spacing between picture tube           coaxial connector. If the measured resistance is less than 1.0 Megohm, or greater
                                                                                                                                                                                             and cabinet mask, (b) excessively wide cabinet ventilation slots, and (c) an         than 5.2 Megohm, an abnormality exists which must be corrected before the in-
                           General Information                                                                                                                                               improperly fitted or incorrectly secured back cover.
                             Model to Major Assembly Cross Reference ....................................................................                             1-3                                                                                                         strument is returned to the customer. Repeat this test with the AC switch in the
                                                                                                                                                                                          3. Observe original lead dress. Take care to restore leads to their original            "off" position.
                             Safety Precautions ...........................................................................................................           1-2                    dress. Make sure that leads are not in contact with sharp edges or thermally
                             Schematic Notes ..............................................................................................................           1-4                    hot parts. Always inspect in all areas for pinched, out-of-place or frayed
                             Specifications ..................................................................................................................        1-3                    wiring. Do not change spacing between adjacent components, or between
                           Schematic Diagrams                                                                                                                                                components and printed circuit board. Check the AC power cord for dam-
                             Power Supply ..................................................................................................................          9-1                    age.
                             Deflection ........................................................................................................................      9-2                 4. Be certain to remove loose solder balls and all other loose foreign particles.
                             System Control ................................................................................................................          9-3                 5. Check components, parts and/or wiring for physical evidence of damage,
                             Gemstar ...........................................................................................................................      9-4                    overheating or deterioration, and replace if necessary. Determine the cause
                                                                                                                                                                                             of damage and/or overheating and, if necessary, take corrective action to
                             uP Controller (F19425, F19431) .....................................................................................                     9-5                    remove any potential safety hazard.
                             Tuner ...............................................................................................................................    9-6
                                                                                                                                                                                          6. Parts Replacement - Many TV electrical and mechanical parts have special
                             Video ...............................................................................................................................    9-7                    safety-related characteristics, some of which are often not evident from vi-
                             Kine Driver ......................................................................................................................       9-8                    sual inspection, and the protection they give cannot necessarily be obtained
                             Kine Driver (F19425, F19431) ........................................................................................                    9-9                    by replacing them with components rated for higher voltage, wattage, etc.
                             DVD (Connectors) ..........................................................................................................             9-10                    Parts that have special safety characteristics are identified in this service
                                                                                                                                                                                             data by a ( ) on schematics and in the parts list. Use of a substitute
                             Keyboard/FAV (20V) ......................................................................................................               9-11
                                                                                                                                                                                             replacement that does not have the same safety characteristics as the recom-
                             Keyboard/FAV (13V) ......................................................................................................               9-12                    mended replacement part in the service data parts list may create shock, fire        LEAKAGE CURRENT HOT CHECK FOR 2-WIRE OR 3-WIRE
                             Audio (IF, TVB) (BD20TF10) ........................................................................................                     9-13                    and/or other hazards. Always consult the appropriate current service litera-         GROUNDED CORD SETS - With the instrument completely reassembled,
                             Audio (Output) (BD20TF10) ..........................................................................................                    9-14                    ture for the latest information.                                                     plug the AC line cord into the mains AC outlet at normal line voltage via a non-
                             Audio (IF, TVB) (13V110TD) ........................................................................................                     9-15                 7. Some TV receiver chassis' normally have 85VAC (RMS) between chassis                  polarized adapter. DO NOT GROUND THE 3RD PRONG OF THE ADAPTER
                             Audio (Output) (13V110TD) ..........................................................................................                    9-16                    and earth ground, regardless of the AC plug polarity. Some TV receiver               AND DO NOT USE AN ISOLATION TRANSFORMER. Use a leakage current
                             Audio (IF, TVB) (F20TF10, F19436, F19431) ...............................................................                               9-17                    chassis' are electrically connected directly to one conductor of the AC power        tester or metering system that complies with American National Standards Insti-
                                                                                                                                                                                             cord. Some TV receiver chassis' have a secondary ground system in addi-              tute (ANSI) C101.1 Leakage Current for Appliances and with Underwriters Labo-
                             Audio (Output) (F20TF10, F19436, F19431) .................................................................                              9-18                    tion to the main chassis ground. This secondary ground system is not iso-            ratories (UL) 1492 (Section 67). With the instrument AC switch first in the "on"
                             Audio (F19426) ..............................................................................................................           9-19                    lated from the AC power line. The two ground systems are electrically                position and then in the "off" position, measure from a known earth ground (metal
                             Audio (F19425) ..............................................................................................................           9-20                    separated by insulating material that must not be defeated or altered. Thus,         water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas,
                           Troubleshooting Aids                                                                                                                                              when servicing any unit always use a separate isolation transformer for the          handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.).
                             Connection Guide ............................................................................................................            5-1                    chassis. Failure to use a separate isolation transformer may expose the              Any current measured must not exceed 0.5 milliampere. Reverse the adapter plug
                                                                                                                                                                                             servicer to possible shock hazard, and may cause damage to servicing in-             in the outlet and repeat the test. ANY MEASUREMENTS NOT WITHIN THE
                             Lead Dress .......................................................................................................................       5-3                    struments.                                                                           LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZ-
                             Voltage Charts .................................................................................................................        5A-1                                                                                                         ARD THAT MUST BE ELIMINATED BEFORE RETURNING THE IN-
                                                                                                                                                                                          8. Many electronic products use a polarized AC line cord (one wide pin on the
                             Yoke Wiring Diagram .....................................................................................................                7-1                    plug). Defeating this safety feature may create a potential hazard to the            STRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE
                                                                                                                                                                                             servicer and the user. Extension cords that do not incorporate the polarizing        ANTENNA OR ACCESSORIES. If a leakage current tester is not available,
                                                                                SAFETY NOTICE                                                                                                feature should never be used.                                                        connect a 1.5 Kohm, 10 Watt resistor, in parallel with a 0.15 



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