Kristel 1428-30k series, Руководство по обслуживанию

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7. VIDEO AMPLIFIER CIRCUIT
The video circuit includes: video processing IC201 and video amplifier circuit (Q211, Q205 and Q208). The
analog video processor IC201 includes gain control and DC restoration. Video signals RGB are input through
the coupling capacitorsC206, C205, C204 and than sent to IC201.
A cascode circuit is used to amplify each R,G,B channel. The value for channel gain is calculated by collector
and emitter resistances. The L205, L204 and L205 are series peaking inductors.
The output amplifier circuit stage, consisting of Q202, Q205, Q206 and Q205 is used to amplify video signal
to 40Vp-p and is represent one of the R,G, B channels.
SG202, SG201 and SG203 respectively R252 and R253 are arc protection components which protect electrical
components when CRT arc condition occurs.
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1428-30k series
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8. CRT TECHNICAL DATA / CHUNGHWA 14” /
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