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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Note that to the average person, the obvious question becomes: The diverse current flow back pin1 of T via R The flow chart is as follows: I Discharge 16 Mylar capacitor 1K 0. Adjust over moduration la769311s points. It’s a community-based project which helps to repair anything. The kind of problems we would like to avoid at all costs are the ones that are intermittent or difficult to reproduce: It need pull-up or pull-down resistor.
An open s-cap will result in no horizontal deflection – a vertical line. 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. Linearity over the two main axis should now be good.
la76931 service manual – Datasheet PDF, IC Circuit
If datawheet get readings that do not make sense, you may be using your equipment in a way catasheet is confusing it. When the video output amplitude more change, use this control. On the contrary conditionit just reverse. There used to be other spread factors influencing the dynamic transistor parameters but these have been mostly eliminated by better process control at P. The current in the flyback primary and collector of the hot are not equal.
Data pin IC LA | bengkel electronic
Depending on the accurate level of horizontal free-run frequency we need, a low offset external resister is requested. A stable synchronization signal can be achieved because it is not interfered by the external vertical trigger. The current now reverses direction retracing its steps.
Pre-shoot adjustment 2 Select pre-shoot width This function can adjust the pre-shoot component of the Y signal. Thencheck the voltage on datasyeet sides with datasheer high impedance voltmeter.
This is called flat-bottom period or pulse interval. The detail checking and repairing steps are as follow. Do not work when you are really tired – it is both dangerous and mostly non-productive or possibly destructive. There are 3 freedoms: Whenever possible, try datasueet substitute a working unit.
LA Datasheet PDF
In this case, the stability of the sync signal is depended on external datazheet. This is called anti-breathing. The average value of the S-cap voltage will be positive.
A standby power supply for the microcontroller and remote sensor. So the working condition of V can be controlled. Whenever working on precision equipmentmake copious notes and diagrams.
Below are some functions which can be control by BUS: The blanking output level of RGB is about 1. Try prodding the main board around the chroma chip with a insulate tool to see if you can make the color come and go. The DC level of the output and the gain of black stretch will be reduced if the value of time constant is large. The voltage across the S-cap is causing the current to decrease but the S-cap is also gaining charge so the rate of decrease is increasing.
When power is turned on ,a relatively high current is applied to the degauss coil wrapped around the periphery of the CRT. You l7a6931s see all sorts of additional passive components catasheet well as transformers for generating additional voltages not provided by the la76931x.
That also reduces the EHT even further, but the deflection current has a stronger effect on the picture width than the EHT. Near the end of scanthe HOT turns off and the cycle repeats.
It has the effect of modifying the dataeheet current into a sine-wave shape. If H-Lock not detect, then stop vertical sync separation. The air gap stores energy, some of which may be tapped off during flyback by secondary rectifiers e. A The desired yoke current is datasheeet quite a sawtooth but includes two major corrections: The switchmode power supply automatic regulates the current in the base of switch transistor to keep the out stable.
Please transform beam current into voltage. 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 darasheet turns on as the voltage negative and diverts the current through it clamping the voltage near0 -Vf for the diodes.
This is a balanced input and it needs a 0.