Adj] Positioning 0-J100; A301 (Top Cover) - Pentax ist D Service Manual

20. [ADJ] Positioning 0-J100

[Required equipment] Penlight or equivalent
① Confirm that the mirror seat is downed condition.
② Remove 0-T970 ･･･ There is a washers underneath 0-T970. Removing the lead wire is not
necessary.
③ Cover the eyepiece with a black tape.
④ Strike light by a penlight to the photo sensor as shown
in the figure right, and search the position where the
pattern of the photo sensor can be seen on the 1
the mount ring side.
⑤ [CONF.] The photo sensor must be positioned at the center of
AF frame as shown in the figure below.
AF frame for spot metering（φ3.8）
⑥ [ADJ.] Loosen the screw, and then adjust the position of sensor. Tighten screw and ensure
position is not changed. If required, repeat adjustment procedures.
⑦ After adjustment is completed, apply the screw lock agent or Super-X to 0-J100 (2 places) as
shown in the figure above right.
⑧ Install W29 and 0-T970.
[Ref.] Attaching brighter lens is advisable to assist better visibility. (Ex.: FA 50mm f/1.4 Lens)

21. 0-A301 (Top cover)

① Confirm that soldering on the main SW land of T100 is removed.
② Install M311 with engaging the Diopter adjustment lever.･･･ DT(5x5)
③ Put 0-A301 on the main body.
④ Solder a black lead wire.･･･ A330
⑤ Solder 6 lands.･･･ T51
⑥ Stick T72 (20x15) on 0-T100.
Tolerance: 0.0～1.0mm
Center position of sensor
Center position of viewfinder
Photo sensor (0-J100)
76180 EM -39/73-
mirror from
st
: Bonding position
0-J100
④
⑤
②
②
Pen-light
Sensor
⑥
⑤