Sony BVP-9500WS, Maintenance Manual

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1-3 (E)
BVP-9500WS/9500WSP MM
PR-248 board
The Line 1 digital signal sent from the DA-143 board is processed as follows in this board.
.
Various detail corrections
. Linear matrix correction
. Knee correction
. Knee saturation correction
.
Pedestal control
. Black gamma correction
. Gamma correction
. White clip
.
Black clip
. 16:9/4:3 processing
. DA conversion
Digital signals are processed as 10-bit RGB digital signals, and output to the camera adaptor via the CA-
1787 board. The analog signals converted in the DA circuit are sent to the EN-141 board.
This board outputs the following signals.
. White shading correction signal
. VF detail signal
.
Various timing pulses
PR-249 board
The Line 2/3 digital signals sent from the DA-143 board are input to the PR-249 board via the PR-248
board. The PR-249 board performs the following processings for the Line 2/3 digital signals.
. Various detail correction
. Linear matrix correction
. Knee correction
.
Knee saturation correction
. Pedestal control
. Black gamma correction
. Gamma correction
.
White clip
. Black clip
. 16:9/4:3 processing
. Digital signal parallel/serial conversion
Digital signals of each line are processed as D1 format serial digital signals from 10-bit RGB digital
signals, and output to the camera adaptor via the CA-1787 board.
DA-143 board
The DA-143 board processes digital shading signals sent from the PR-248 board as follows at
x
1 and
x
3
speeds.
Shading waveform when x x x x x 1 speed:
Digital signals input to the DA-143 board are DA-converted and output to the VA-200 board.
Shading waveform when
x x
x x
x
3 speed :
Digital signals input to the DA-143 board are x 1 speed signals. They are therefore converted from
x 1 speed to x 3 speed in the memory circuit. Signals converted to x 3 speed are DA-converted and
output to the VA-200 board.
1-1. Circuit Description