Question about Goldstar GLV-B1000 4 in. Television

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Vertical rolling in t.v.

Hello sir, i am a T.V. technician in jaipur.I have got a problem in a B/W portable which the fault is vertical rolling,so have check the vertical section and i have changed the cap.near with vertical ic. pl. suggest me for this fault. Regards kamal kishor

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Re: Vertical rolling in t.v.

Kamal, You need to find the sawtooth waveform which is generated by the vertical oscilator. There will be a pin on the IC that should show the waveform. If it is not there, then the IC is bad. If it is there, then there is probably an amplifier stage prior to the deflection yoke that has a problem. Either way, the sawtooth wave is not getting to the deflection coil which is why it is rolling. Ther might also be a coupling capacitor which has opened up. Hope this helps.

Posted on Nov 11, 2006

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Hello sneakjock,

This is a problem with the vertical output signal. Check the vertical coupling capacitor, the vertical output between the yoke transformer and the vertical output transistor amplifier or (IC output). My odds are on the coupling capacitor being bad.

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