CX-958
When the above conditions are all met and the focus is
closed, the XSI pin goes to low from the current high,
then 40 ms later, the microcomputer begins to monitorFD
the RFOK signal after it that has been passed through
REFO
the low pass filter.
LENS POSITION
When the RFOK signal is recognized as low, the micro
RELATIVE TO DISC
computer carries out various actions including
NEAR
protection."JUST FOCUSED"
LEVEL
Fig.11 a series of operations carried out relevant to the
FAR
focus close (the figure shows the case where focus
close is not available).
You can check the S-curve, search voltage and actualMD
lens behavior by selecting the Display 01 for the focus
REFO
mode select in the test mode, and then pressing the
focus close button.
Expanding around "Just Focused Point"
RFI
REFO
FOK
FZD
FETHRESHOLD
LEVEL
FZD
(INTERNAL SIGNAL)
Focus closing would normally take place at these points
XSI
(IN THE EVENT
FOCUS IS
CLOSED)
Fig.11 : FOCUS CLOSE SEQUENCE
8 |
ACEC
