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Pentax MX Service Manual

Pentax MX
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23800 /3615
47. Light measurement
a.) Temporary setting — Top cover tool, shutter dial, winding lever
b.) Battery checker — VR
A
EV12, f8, 1/60, ASA100
2.6V Light off
2.7V Light on
c.) Light measurement — VR
B
or VR
C
EV12, f8, 1/60, ASA 100, 2.8V
When shutter dial is turned 1EV step (1/60 — 1/30 and A/60 — 125), and both red LED
(over and under) light on, it shows within 0.1EV difference.
d.) Confirmation of voltage reliability
EV12, f8, 1/60, ASA100
When voltage is dropped down from 2.8V to 2.7V, LED indication should not change.
e.) When mirror stays up, LED should not light on.Check it at B.
48. Focusing adjustment
a.) Removing Top cover tool and others
b.) Adjust focusing with Focusing screw (M6) x 4
49. Adjustment of Focusing plate holder assembly (0-B101)
If vertical play is felt on (0-B101), remove Cover plate (B109) and adjust the position of
Hook metal assembly (0-M107) with eccentric screw.
50. Top cover assemb1y (A300)
Winding lever, shutter dial, rewind knob and other small parts.
Tools — 23110K-D16-1-A
23800K-E231-A
23600K-C135-A
51. Bonding Coverings (A19 & A20)

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Pentax MX Specifications

General IconGeneral
Film Format35mm
Lens MountPentax K mount
Exposure ModesManual
FocusManual
Camera TypeSLR
Shutter Speed1 to 1/1000 second, plus B
MeteringCenter-weighted

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