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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This represents a short-circuit at the secondary side of the flyback. 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.

la76931 service manual – Datasheet PDF, IC Circuit

Defective chroma chip do not suspect this first just because it is probably very expensive. MP is adjusted in the wafer line Adjustment has done for mass production products. For example, if the Vcc is datasyeet, it is 3V. What happens to the HV?

As the load increases, the average primary current rises. 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.

la 7n datasheet Questions & Answers (with Pictures) – Fixya

If you use choose PayPal la a payment option, your billing and shipping address must be identical. Datasgeet is a balanced input and it needs a 0. Lz76931 S-cap that changed value or selected to be the wrong value will result in distortion at the left and right sides of the screen: The flyback should largely not know the difference with the socket plugged into the CRT. To improve the buzz characteristic, we recommend the application circuit as below: This is called the average beam current limiter.


A typical driver transformer may be in the Chapter Five Typical Failure Analyse.

Larger beam current requires that the HOT be switched on earlier. When Selected Video Out Mode, this signal which is selected by a video switch among 56pin or 54 pin input signal, is amplified 6dB and then output here.

The failures are mainly in the small signal processing circuits. When the video output amplitude more change, use this control. W e can use the resistance function of an analog multimeterconnect the red pole negative in ohm scope on the circuit board groundthen touch softly the test point with another pole black pole in ohm scope meanwhile observe the reactivity on the output device.

The control grid voltage will end up the little board on the neck of the CRT check there as well for bad solder connections or open resistors. Because the electron beam can not move in the horizontal orientation, the failure should be in the horizontal deflection circuit. Little parts may fit in more than one place orientation. C2 is a smoothing capacitor. It becomes standard mode if it is synchronize with the standard signal The sample voltage is taken from RP The detail checking and repairing steps are as follow: Therefore, the design of FBP input circuit adjustment of horizontal phase, jitter characteristic etc become more easier.

Check the control itself for proper operation with an ohmmeter. N is an photocoupler that implements light – electric conversion. But, it is possible that the output of IF signal or noise signal of IF circuit may interfere the video signal in some expected conditions.


Get used to the idea of working without a schematic. Please change the value of R, which is depending on the specification of tuner, to decide the DC voltage output. Before repairing, assure that the volume is on and the state of set is in Yes Hear if there is the voice liking Ka Try to remember that the problems with the most catastrophic impact on operation- a dead TV usually have the simplest solutions.

This IC has a function which is used for horizontal position fine adjustment: C If there were no damper diode D1this voltage would go negative and continue to oscillate as a damped sinusoid due to the resonant circuit formed by T and C,C and the other components However ,D1 turns on as the voltage negative and diverts the current through it clamping the voltage near0 -Vf for the diodes.

LA Datasheet –

The S-capacitor together with the yoke inductance forms a resonant circuit whose frequency is tuned lower than the line frequency. Without special measures, brighter pictures will be larger.

When power is turned on ,a relatively high current is applied to the degauss coil wrapped around the periphery of the CRT. The switch on time more longerthe energy magnetic stored in T will be more stronger.

Always use an isolation transformer when working on a TV because this is especially important-for your safety – when dealing with the non- isolated line operated Power supply.

At its peak ,this voltage Drive inside will be V to V.