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Using external vertical trigger to reset countdown circuit. After approximately 5 minutes or slightly longer, the screen voltage will wander anywhere from 75V up to maybe V, Adjustment of the screen control on the flyback has only a small effect and is not permanent. But, the output impedance is very high.


LA76810A Datasheet PDF

In this process, Ug does not put any current in the base of V, on the contrary, decreases the startup current oa76810 V rapidly. It also makes sense to identify exactly what is and is not working so that you will know whether some fault that just appeared was actually a preexisting problem or was caused by your poking.

In TVit need switching typical power to provide stable DC. It enable to turn on or off the main power.

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There will be a sign “LA option menu Way of selecting a pair found that need jumper for entry into service.

Over modulation adjust switch 0: And yet, in recent years that I met – marking the top body panels are often marking corresponds to the processor the last four characters, in particular, LCA – 5Z Min Each control variable range is show below: The second – a hidden button on the remote.

Safety first – know the hazards associated with the equipment you are troubleshooting. Please change the value of R, which is depending on the specification of tuner, to decide the DC voltage output. The peak amplitude of base current and the way it is decreased determine the ultimate dissipation in the HOT and thus subject of heavy optimization. Please use this function when adjust RGB Bias.


These cannot be applied easily with such a configuration. The signal, which is peak detected by the AGC detector, is la6810 by the external capacitor and become to AGC voltage. Exit – buttons The recommend value of this capacitor is 1uF. A more important rational is that a transformer is nice easy way of impedance matching the horizontal driver circuit to the few ohm input impedance of the horizontal output transistor base which requires upwards of several amps for proper drive.

A failure in the video path, like a video output amplifier stuck at 0V, causes a high beam current that will not react to the contrast controller. There are 3 freedoms: In this case, the total current would divide between the flyback primary and the yoke. The measure is to feed some EHT information or beam current information to the deflection l7a6810, reducing the deflection current amplitude a bit for bright pictures.

Ug charge C reversely. Do not immediately assume that your problem is some combination of esoteric complex convoluted failures.

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In essence – this is a service manual. The repairing method B1 may be refered without picture. This is usually safe to do in such case and will quickly identify which unit need work. Then it will pass through a amplifier after the DC output is fixed.

Confirm the problem before diving into the repair. The d elay incurred by gen eratin g an LU T o u tp u. It derives dqtasheet the DC voltage power supply.


Better methods exist too. If an Internal receiver clock la programmed, this pin can be a. This IC has a function which is used for horizontal position fine adjustment: In the other hand, the time constant of APC loop is determined by the capacitor C1 and the internal resistor inside La7680.

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Select pin 5 output. Horizontal output transistor specs and substitution: The sample voltage is taken from RP There is an entry for Products in the compound, which is located directly on the card remote control. This make the current between pin3 and pin7 of T51 1 to decease.

Appears “LA option menu The capacitor is charging datasheeg black peak period, and discharging via external CR exclude black peak period. This pin is selected at C.

If this is present on the focus or screen traces or wires, it many just be your problem. A resister is needed to connect with this pin from Vcc. Whenever working on precision equipmentmake copious notes and diagrams. The inducted voltage pin10 – pin16 will be more higher. At its peak ,this voltage Drive inside will be V to V. Refer to Figure 2. The current waveform can be easily viewed on an oscilloscope with a high frequency current probe.

When power is turned on ,a relatively high current is applied to the degauss coil wrapped around the periphery of the CRT. With an operation datasheer frequency of MHz, the V can perform the data processing .