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ASAHI PENTAX 6x7 Service Manual page 90

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bo 39
BATT
checker
BATT
checker
button
"ON!"
AD
ra:
0.1~0.2
mm
4-4-19
BATT
CHECKER
ADJUSTMENT
Adjust VR3
so that the lamp glows at 5.0 V and dies out at 4.9 V of
the source
voltage.
To prevent unnecessary
consumption
of the battery,
BATT
checker
SW must be adjusted, so that the checker
circuit operates
when the che-
cker button is pushed in to the position shown above.
4-4-20
BOUNCE
PREVENTION
ADJUSTMENT
This adjustment has an intimate relation with the shutter curtain
speed adjustment;
the intensity
of the bounce
prevention
system
is deter-
mined
by the curtain
speed,
and the curtain
speed check must
be perform-
ed after the proper
intensity
of the bounce
prevention is given.
Therefore,
preliminary
or
approximate
,and final adjustment
are
required.
lst and 2nd damper
disks
require the respective adjustment.
Adjusting
steps
1
Screw in ( counterclockwise)the both adjusting nut(E24) of the damper
disks, so that the each damper
disk stops before
it hits the stopper
when the shutter is operated at ''15"' of the shutter dial.
2
Operating
the shutter,
unscrew( clockwise)
the each nut gradually.
The
clearanc
between
the damper
disk and stopper will decrease.
3
Stop unscrewing
when the disk starts hitting the stopper.
Then, un-
screw
the nut for another
l-revo.
Lock the nuts with the lock screws
(E28).
How to check
the curtain bounce
lst
curtain:
The bounce will be observed
when you operate
the shutter
at low
shutter speed, lower than 1/30 sec.
2nd curtain:
The bounce will be observed, at high shutter
speed such as
1/1000 sec.
:

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