Pioneer YPM-2106ZF Руководство по эксплуатации - Страница 35
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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 monitor
the RFOK signal after it that has been passed through
the low pass filter.
When the RFOK signal is recognized as low, the micro
computer carries out various actions including protec-
tion.
Fig.11 a series of operations carried out relevant to the
focus close (the figure shows the case where focus
close is not available).
You can check the S-curve, search voltage and actual
lens behavior by selecting the Display 01 for the focus
mode select in the test mode, and then pressing the
focus close button.
FD
LENS POSITION
RELATIVE TO DISC
NEAR
FAR
MD
Expanding around "Just Focused Point"
RFI
FOK
FE
FZD
(INTERNAL SIGNAL)
Focus closing would normally take place at these points
XSI
(IN THE EVENT
FOCUS IS
CLOSED)
Fig.11 : FOCUS CLOSE SEQUENCE
YPM-2306ZF
REFO
"JUST FOCUSED"
LEVEL
REFO
REFO
FZD
THRESHOLD
LEVEL
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