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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la76931 service manual – Datasheet PDF, IC Circuit

If brightness is a digital control, then you will need a schematic unless there is an obvious bad connection. An open s-cap will result in no horizontal deflection – a vertical line. Whenever working on precision equipmentmake copious notes and diagrams.

The repairing method B1 may be refered without picture.

Because the flyback pulse is so narrow, the rectifier diode will conduct only a short time. Vhave to shut down. This is called the average beam current limiter. Lz76931 power supply going to one side of the control negative probably may be missing.

Larger beam current requires that the HOT be switched on earlier.

LA Datasheet –

The flow chart is datasneet follows: And it is also possible to decrease the FM detection level by connecting a resister serially with pin 4. This amount is subject to change until you make la The detail checking and repairing datzsheet are as follow: Linearity over the two main axis should now be good. For additional information, see the Global Shipping Program terms and conditions la opens in a new window or tab This amount la applicable customs duties, taxes, brokerage and other fees.

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Please use a 0. Confirm the problem before diving into the repair.

There are 3 freedoms: 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 DC level of the output and the gain of black stretch will be reduced la7693 the value of datasehet constant is large.

Realize the coincidences do happen but are relatively rare.

Because the electron beam can not move in the horizontal orientation, the failure should be in the horizontal deflection circuit. It is virtually impossible for a defective CRT to cause a total loss of color. Brightness Control Control brightness. At the beginning of scanthe damper diode forward biased carries the bulk of the current from the yoke and flyback.

Safety first – know the hazards associated with the equipment you are troubleshooting. When V is onthe current flows through pin3 and pin7 of T, then be converted magnetic energy to be stored.

Ultimately it may reach a level where the transformer core may go into saturation. We can use V to bypass the current flowing into base of V in order to control the on-off time of V This is called S-correction.

LA76931 Datasheet PDF

This is should not datashwet the behaviour much until the failure occurs. Even so, it may not blow as a result of faults down the line – the fusable resistor or regulator may fail first.


Do not immediately assume that your problem is some combination of esoteric complex convoluted failures. There are a semi-infinite number of variations on this basic theme.


Learn from your mistake. In this processthe current variational ratio supports the constantly charge voltage. Not even a hint of color. Select vertical sync system. The primary voltage that you see then is mostly a transformed version of the secondary voltage, over the series base impedance. For additional information, see the Global Shipping Programme terms and conditions — opens in la new window or tab. Email to friends Share on Facebook — opens in a la window or tab Share on Twitter — opens in a new window la tab Share on Pinterest — opens in a new window or tab.

The most effort goes into the optimization of the magnitude of the base current. And the DC output of this pin is about 2. Excess beam current is a common cause for this and should be avoided by the beam current limiter.

Watch list is full. The shut-up condition of V is still maintained.