7. Internal signal output circuit
The hatch signal and the dot signals are sent to IC810 pin-9 where these signals are converted to the
signal level that is sent to Q830. The gray scale signal, all white signal and the PLUGE signals are D/A
converted by IC806 and are outputted through IC810 and Q830. The internal H. sync signal is outputted
fromIC104 pin-3 and the internal V. sync signal is outputted from IC104 pin-6.
8. Closed caption signal
IC124 is the decoder of the closed caption. When the SDI 4:2:2 signal is displayed, the video signal does
not contain the sync signal. Therefore, the composite sync is added by IC106 (1/3). IC107 and IC108 are
the composite signal generation circuit.
9. VITC circuit
IC20, IC29, IC21 and CN7 are the VITC circuit. The VITC circuit is operated by connecting the BC1
(option) board.
10. On-screen Display Circuit
IC805 is the on-screen display IC. Output of IC805 is OR-gated with the SAD and closed-caption signal.
The OR-gate output is sent to other circuit as the CHR signal.
11. H. sync signal generator circuit for 15 kHz signal
IC107 generates the H. sync signal generator circuit for 15 kHz signal. Because the H. sync signal of
PLD deteriorates of its skew during the fast forward mode of VCR, the H. sync signal is separately
created for the 15 kHz signal. Rise-up of this signal is the timing of the H. delay.
BVM-D20F1A/D20F1E/D20F1U/D24E1WA/D24E1WE/D24E1WU6-11 |
ACEC
