la service manual – Datasheet PDF, IC Circuit. USOC(LA) SERIES SERVICE MANUAL Table of Contents 1. Preface. Find solutions to your la 7n datasheet question. Get free help, tips & support from top experts on la 7n datasheet related issues. LA PIN 1= SIF OUTPUT [V DC] PIN 2= IF AGC FILTER PIN 3= SIF INPUT [V DC] PIN 4= FM FILTER PIN 5= FM OUTPUT [V~V] PIN 6= AUDIO.

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Try to get as much information as possible about the problem from the owner. The shut-up condition of V is still maintained. The signal, which is peak detected by the AGC detector, is smoothed by the external capacitor and become to AGC voltage. This item will be la through the Global Shipping Program and includes international la We recommended the value of C1 is 0.

(PDF) LA76931 Datasheet download

Safety first – know the hazards associated with the equipment you are troubleshooting. Obviously ,when the reverse charge current is less than startup current, V will turn on again and finish another self-excitation oscillation.

The current now reverses direction retracing its steps. The detail is described as follow: A set of rectifiers – in a bridge configuration – to turn the AC into DC. A typical driver transformer may be in the At the datashewt the current passes through 0,the S-cap 9 Is charged to its maximum.

Daatasheet base-drive to the HOT must have been switched on before this point!

LA Datasheet –

To prevent this lq76931 EHT information is fed to the contrast controller, to automatically reduce the picture brightness whenever the white content is too much. You should not be touching components with the device powered and plugged in at leastnot until you really know what you are doing!


This is a private listing and your identity will la be disclosed to anyone except the seller. When the cathodes heat up ,you will see an even picture with diagonal retrace lines and then it will switch off. The average value of the S-cap voltage will be positive. Defective chroma chip do not suspect this first just because it is probably very expensive. Most purchases la business sellers are protected by the Consumer Contract Regulations which give you the right to cancel the la within 14 days after la67931 day dataxheet receive the item.

It is called Signal-input way. Thus the peak current in the la76391 will be quite high, resulting in a significant voltage drop when loaded. This will cause the current variety in the collector of V, this various current is amplified by V and controls the b-e current in of V Ib. Better methods exist too.


The failures are mainly in the small signal processing circuits. For additional information, see the Global Shipping Programme terms and conditions — opens in la new window or tab. B The flyback also generates the HV and secondary output voltages and the primary current might then be affected by these and change as a function of beam current picture brightness or audio level although feeding the audio amplifiers from LOT windings is not common anymore.

The wire may be soldered or just pressed in place in such a way that pulling it out is difficult or impossible without removing the cover. If you substitute a heavier transistor more amps, more volts, more watts, faster switching, whatever for a lighter one, then there is a very big chance that it will fail earlier, not later.


Because the electron beam can not move in the horizontal orientation, the failure should be in the horizontal deflection circuit. It is connected with the base of V and controls the degree that V turns on.

You can play similar games with focus voltage. The phase of the signals, which are divided from chroma frequency and Snd-VCO frequency, will be compared together. This represents a short-circuit at the secondary side of the flyback. With modular systems like component stereos and computers, narrowing down a problem to a single unit should be the first priority.

If you use choose PayPal la a payment option, your billing and shipping address must be identical. Therefore, if the capacitor C1 is variable, the time constant of loop will change largely by datasueet step. All credit cards are processed with Authorize.

The final voltage regulated depends on V,V etc. It’s a community-based project which helps to repair anything. Therefore, the design of FBP input circuit adjustment of horizontal phase, jitter characteristic etc become more easier. The S-capacitor together with the yoke inductance forms a resonant circuit whose frequency is tuned lower than the line frequency. The answer is a definitive NO.

LA Datasheet PDF – 64Pin IC for Color TV Receiver

This makes it extra difficult to optimize the base-drive because there is only a limited time interval where the HOT may be switch on and that interval is shorter with high beam current load. Also, in case of develop many chassis, this can contribute to speed up the development period.

The maximum DC voltage of pin 4 darasheet 9V.