.!24!.
PLL2 Phase Detector
This phase detector is similar to the PLL1 detector and compares the line flyback pulse at pin 1 with the
oscillator saw-tooth voltage. The PLL2 detector thus compensates for the delay in the external H-deflection
circuit by adjusting the phase of the HDRV output pulses. The phase between H-flyback and H-sync can be
controlled at pin30.
X-ray Protection
The X-ray protection input pin2 provides a voltage detector with a precise threshold. If the voltage exceeds
this threshold for a certain time, an internal latch switches the whole IC into protection mode. In this mode
several pins are forced into defined states:
Pin8 (HDRV) is floating
Pin6 (BDRV) is floating
Pin12, 13 ( VOUT 1, 2) are floating
Pin16 (CLBL) provides a continuous blanking signal.
Vertical Oscillator
The vertical free –running frequency is determined by the resistor R602 at pin23 and capacitor C602 at
pin24. Usually the free-running frequency should be lower than the minimum trigger frequency.
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