Service manual

Figure: Block diagram 3D Comb panel
Synchronization (Diagram B3 and B4)
The HIP video processor provides vertical and horizontal sync pulses VA and HA, which
are synchronized with the incoming CVBS signal. These pulses are fed to the PICNIC
where they are doubled to be synchronous with the 100Hz picture. The outgoing pulses,
VD100 (in reality 60 Hz), and HD100 are fed to the HOP that supplies the vertical and
horizontal drive pulses and the 2fH sandcastle pulse.
Via a mono-stable multi-vibrator circuitry (7309/7311), a frame flyback pulse is
generated of 530s. This pulse is triggered by the Frame + output of the HOP-IC. The
VSYNC output of this circuitry together with 'HS' signal (retrieved from the HFB signal
via TS7007 on diagram B7) synchronize the Painter for stable OSD/CC.