Video And Osd Processing; Rgb Preamp - Sony CPD-420GS Training Manual

Video and OSD Processing

RGB PREAMP

The RGB PREAMP IC008 receives the RGB and Sync signals from two
sources. One is the conventional 15 D-sub connector and the other is the
15 D-sub female connector input located on the front of the monitor. The
purpose of this second input is to allow easy hookup to a laptop com-
puter. The RGB signals from the conventional 15 D-Sub connector are
input to IC008 pin 2 (B), pin 5 (G) and pin 7 (R). The Sync signals are
input to IC008 pin 8 (H) and pin 9 (V).
The RGB signals from the additional 15 D-Sub female connector are in-
put to IC008 pin 11 (B), pin 13 (G) and pin 16 (R). The Horizontal and
Vertical Sync signals are input to IC008 pin 17 (H) and pin 18 (V).
IC008 switches between inputs selected by the user via the front panel
button. IC1001/1 (N Board) logic output selects the input source via
CN1004/2 to CN309/2 'INPUT SW' to the A Board. The 'INPUT SW' sig-
nal is routed to IC008/19 (SW) to select the conventional 15 D-Sub con-
nector input or to select the 15 D-Sub female connector from the front
panel.
CN309/5 VS OUT
37
The V OUT Sync signal from IC008/21 (V OUT) is routed to the N Board.
The H OUT Sync signal from IC008/22 (H OUT) is input to the H DRIVE
BUFFER IC006 pin 8 and pin 9. IC006 buffers the H OUT signal which is
output at pin 4 is routed to the N Board.
The R G B input signals are then buffered and output from IC008 pin 27
(R OUT), pin 30 (G OUT) and pin 35 (B OUT) to IC001.
CN309/7 H SYNC
IC008/27 R OUT