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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Data pin IC LA | bengkel electronic
The detail is described as follow: The internal impedance of the EHT source is in the order of 1 Mohm, so with a load e. Tint control set center value. This make the current between pin3 and pin7 of T51 1 to decease. At the end of scan ,current is flowing through the flyback primary to the HOT, V Refer to Figure 2.
Confirm the problem before diving into the repair. This current will smoothed at the external capacitor of pin 7 and control Snd-VCO.
Brightness control has no effect The following assume that the picture is fine but the brightness is fixed-probably at too high a level. The flyback rectifiers esp. It will undergo a linear increasing process. The kind of problems we would like to avoid at all costs are the ones that are intermittent or difficult to reproduce: In that case the beam current will not work and the set should switch off automatically, usually within a few seconds after applying power.
On the contrary conditionit just reverse. Select a work area which is wide open, well lighted and where dropped parts can be located – not on a deep pile shag rug. R,RPR connect in series.
(PDF) LA76931 Datasheet download
Please use a 0. The inducted voltage pin10 – pin16 will be more higher. The maximum drive current of Q1 is 1mA. Adjustment has done for mass production products. It becomes standard mode if it is synchronize with the standard signal The failures datasgeet mainly in the small signal processing circuits.
The process is shown below: Use YcbCr input mode and YC input mode. A power supply going to one side of the control negative probably may be missing. A more important rational is that a transformer is nice easy way of impedance matching l7a6931s horizontal driver circuit to the few ohm input impedance of the horizontal output transistor base which requires upwards of several amps for proper drive.
Before checking these circuits ,a kind of practical test method is introduced. When power is turned on ,a relatively high current is applied to the degauss coil wrapped around the periphery of the CRT. Timing is not very critical as long as it happens between the end of the flyback and zero crossing of the summed current.
There are a semi-infinite number of variations on this basic theme. The maximum input for this pin is 96dBu. The current in the base of V Ib also decreases simultaneously.
If R1 is increased, the loop gain will increase and the pull-in range will increase as datasheeet. It need pull-up or pull-down resistor. As a result they will be easier to deflect by the magnetic field, and the picture size will grow.
LA76931 Datasheet PDF
When the video output amplitude more change, dxtasheet this control. While checking horizontal and vertical deflection circuit s failurewe have better to use an oscilloscope. If you get stucksleep on it. 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.