Data IC LA Data Voltage PIN 1. SIF OUTPUT V PIN 2. IF AGC FILTER 0V PIN 3. SIF INPUT V PIN 4. FM FILTER V PIN 5. 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. Part Number: LA Function: 64Pin LA for Color Television Receiver / SERVICE MANUAL. Maker: Unspecified Pinouts: LA
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Excess beam current is a common cause for this and should be avoided by the beam current limiter. Ug charge C reversely. This function can adjust the Over —shoot component of the Y signal. The sample oscillation circuit characteristics may differ applications. Set this function off in PAL system.
No sound In this kind of failurefirst of all we should observe if there is the picture on the CRT. La7693s1, the output impedance is very high. 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.
Adjustment has done for mass production products. Color killer set too high internal control if it has one. While checking horizontal and vertical deflection circuit s failurewe have better to use an oscilloscope.
Recommended Oscillation Circuit and Sample Characteristics. Please change datsheet value of R, which is depending on the specification of tuner, to decide the DC voltage output. Some of them willto put it mildly, appear quite obscure or to put it more positively, creative at first.
LA Datasheet PDF
The DC voltage is about 2. The best location will also be relatively dust free and allow you to suspend you troubleshooting to eat or sleep or think without having to pile everything into a cardboard box for storage. At its peak ,this voltage Drive inside will be V to V. Use a resister of 4. Datashdet 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.
Then the discrepancy phase will transform to be current and output to pin 7. Adjust over moduration operating points. Non-standard mode Standard mode: At the beginning of scanthe damper diode forward biased carries the bulk of the current from the yoke and flyback.
The detail checking and repairing steps are as follow: A typical driver transformer may be in the Chapter Five Typical Failure Analyse. But they make no use of the stored magnetic energy, they load the primary directly during the scan part.
LA76931 Datasheet PDF
Pre-shoot adjustment 2 Select pre-shoot width This function can adjust the pre-shoot component of the Y signal. Vertical deflection, signal circuits, and high voltage supplies and non-rectified load e. Try to remember that the problems with the most catastrophic impact on operation- a dead TV usually have the simplest solutions. The signal, which is peak detected by dtaasheet AGC detector, is smoothed by the external capacitor and become to AGC voltage.
This is called flat-bottom period or pulse interval. When the video output amplitude more change, use this control.
LA Datasheet –
The level of influence is depending to the pattern lay-out of the chassis. When V is onthe current flows through pin3 and pin7 of T, then be converted magnetic datashret to be stored. At this point with a confirmed color signal source, there is a problem with the chroma circuitry. Brightness Control Control brightness.
Perform a channel search by 0 VOL. Audio SW 1 The switch of Int. In this process, Ug does not put any current in the base of V, on the contrary, decreases the startup current of V rapidly. On the contrary conditionit just reverse.
This is called anti-breathing. It has the effect of modifying the sawtooth current into a sine-wave shape.
There is no necessary to connect an external capacity if a stereo IC is used. There is an attenuator between input int.: In order to prevent the unsatisfied drive capacity of amplitude matching 1Vpp and load video circuit, chroma circuit, deflection circuitwe recommend application circuit below: