LA7674 DIAGRAMA PDF

Block Diagram. 8. General Schematic Diagram. Parts List. 27 .. LA CHECK SOUNDIF INPUT. Z CHECK 1Vp-p. MUTE ON: 5V. OFF: 0V. Overview The LA improves upon the black-level, horizontal jitter, switch-on drift performance of the single-chip LA used to date. Also a single-chip IC. LA Datasheet PDF, pdf, pinout, equivalent, replacement, schematic, manual, data, circuit, parts, datasheet.

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Skip to main content. Log In Sign Up. Do not attempt to modify this product in any way. Unauthorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. Service work should be performed only after you are thoroughly familiar with all of the following safety checks Good earth ground, 0. Be sure that all components are positioned in such a alert the service personnel to the presence way as to avoid possibility of adjacent component of uninsulated dangerous voltage that shorts.

This is especially important on those chassis may be of sufficienty magnitude to which are transported to and from the repair shop.

LA – SANYO -> Panasonic Hoja de datos – DataSheetBank

Never release a disgrama unless all protective devices The exclamation point within an equilateral such as insulators, barriers, covers, shields, strain triangle is intended to alert the service reliefs, and other hardware have been reinstalled per personnel to the presence of important original design.

Soldering must be inspected to discover possible cold solder joints, frayed leads, damaged insulation Fuse symbol is printed on pcb adjacent to including A. Be certain to remove all loose foreign particals.

The symbol is explained in the service manual with the 4. Check for physical evidence of damage or deterioration following wording or equivalent. All critical components such as fuses, flameproof resistors, capacitors, etc. Do not use replacement components other than those specified la7647 make unrecommended 1. Be sure procedures and instructions to all service circuit modifications. However, this tube does 7.

After re-assembly of the set always perform an A. The proper value is given in the cabinet, the channel selector knob, antenna l7674, applicable schematic.

LA7674 Hoja de datos – SANYO -> Panasonic

Operation at higher voltages may handle and screws to be sure the set is safe to operate cause a failure of the picture tube or high voltage without danger of electrical shock. Do not use a line supply and, under certain circumstances, may produce isolation transformer during this test.

Only factory specified C. Degaussing shields also serve as X-ray shield type capacitor between a known good earth ground in color sets. It is essential that the serviceman has available an parts, one at a time. The the combination of ohm resistor and 0. Such as the one voltage measurements for each exposed metallic part. Voltage measured must not exceed 0. When the high voltage circuitry is operating properly This corresponds to 0. Any value there is no possibility of an X-radiation problem.

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Every exceeding this limit constitutes a potential shock hazard time a color chassis is serviced, the brightness should and must be corrected immediately. Avoid conditions of high humidity such as: We suggest that you and your service patio installations where dew is a factor.

Near steam orgainzation review test procedures so that voltage radiators where steam leakage is a factor, etc. And that the high voltage reading be recorded 3.

Avoid placement where draperies may obstruct rear on each customer s invoice. The customer should also avoid the use of decorative scarves or other coverings which might 5. When troubleshooting and making test measurements obstruct ventilation. Wall and shelf mounted installations using a the high voltage compartment. A receiver mounted to locate the cause of excessive voltage. Perform diagrams where used.

Caution customers against the mounting of a receiver 1. All direct viewed picture tubes are equipped with an on sloping shelf or a tilted position, unless the receiver integral implosion protection system, but care should be is diarama secured. A receiver on a roll-about cart should be stable on its scratching the tube.

If scratched, replace it.

Caution the customer on the 2. Use only recommended factory replacement diavrama. For use with their specific model of television 1. Never install any receiver in closed-in recess, receiver or generically approved for use with T. The section below summarizes the buttons,controls, and terminals that you will use with your TV.

Your TV s Front Panel 1. CH Use these buttom to change channels on your TV, or to select items in the menu system. VOL Use these buttom ddiagrama change your TV s volume, to activate selections in the menu system, or to change audio and video settings. Remote control receiver This receiver receives a signal from your remote control. Do not block it. Your TV s Back Panel 1.

Antenna terminal Use this terminal to attach an antenna or cable system to your TV. To avoid such ty in the following manner. The nominal value of the high voltage Connect at ohm 10 watt resistor, paralleled by a of this receiver is AC type capacitor, between a known good minimum brightness under a V AC power source.

Measure the AC exceed 27kv Each time a receiver requires voltage across the combination of ohm resistor servicing, the high voltage should be checked following and 0. This corresponds to 0. It is recommended as a parts of the millliamp. Any value exceeding the limit constitutes service record. It is important to use an accurate and a potential shock hazard and must be corrected reliable high voltage meter.

For continued safety, parts replacement should be 3. These characteristics are often passed unnoticed by a visual 2. Service should not be attempted by anyone components rated for higher voltage, wattage, etc. Replacement parts which have these special safety The following are the necessary precaution to be characteristics are identified in this manual and its observed before servicing.

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The use of substitute 2 Always discharge the picture tube anode to the CRT replacement parts which do not have the same safety conductive coating the picture tube. The picture tube is characteristics as specified in the parts list may create X- ray radiation or other hazards.

Use shatterproof goggles and keep picture tube away from the body while handling. Check the 2 Adjust all customer controls for normal picture and basic characteristics such as digarama, focus and sub- basic sound.

Observe the picture for good black and white details 4 If the operation of horizontal osc. If color shading is The circuit diagraja be repaired, before the set is returned evident, demagnetize the receiver. If color shading still to the customer. This should be all that is necessary to achieve Optimum receiver performance. Then 3 Connect accurate high voltage meter to CRT anode. If a correct reading cannot be dixgrama, check circuity for malfunctioning components.

At the same an acceptable picture. Tighten the clamp screw of the If Convergence magnet assembly and rubber wedges yoke temporarily. Before attempting any purity adjustments, the NOTE: This adjustment requires Rubber Wedge Kit. Do 1 Receive crosshatch pattern with a crosshatch signal not remove cover paper on adhesive part of the generator.

Adjusting on picture tube to hold the yoke. Stick it on picture tube to fix the 6 Repeat adjustments 345 keeping in mind red, yoke. Tighten the screw firmly to hold the yoke complex.

Isolation transformer must be used to prevent shock hazard. The test equipment specified or its equivalent is required to ls7674 the alignment properly.

Use of equipment which does not meet these requirements may result in improper alignment. Accurate equipment is essential to obtain proper alignment of this receiver. Use of excessive signal from a sweep generator can cause overloading of receiver circuit Overloading should be avoided to obtain a true response curve.

Insertion of markers from the marker generator should not cause distortion of the response curve. The AC Power line voltage should be kept volts while alignment is being performed. Do not attempt lz7674 disconnect any components while the receiver is in operation.

Make sure the power cord diagramw disconnected before replacing any parts in the receiver. ADD V R ADD 25V u R ADD 25V 47u R ADD 50V p J