11-3
By this, AFC feedback is produced without passing through
ICH08 (LA7860), and there is only one AFC circuit (Fig. 3
) in one closed loop. Therefore the said bending and
trembling will not happen. In this way, complex switching
circuit is added, to manage V/C/D IC for TV well.
IC501
TA8801AN
H.Osc H.Out
AFC
H.sync
signal
Mono
Multi
ICH08
LA7860
H.Drive
Deflection
Out
H.Osc H.Out
AFC
False
sync
signal
a
IC501
TA8801AN
H.Osc H.Out
AFC
H.sync
signal
Mono
Multi
ICH08
LA7860
H.Drive
Deflection
Out
H.Osc H.Out
AFC
False
sync
signal
b
Mono
Multi
Fig. 3 Loop of AFC circuit
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