Specifications

Possible cause: Pressure on Film Advance lever causing automatic diaphragm actuating

plate to press against pin on back of lens. THIS CAN CAUSE SERIOUS DAMAGE TO

LENS. Check to be sure that the meter is turned " OFF." DO NOT USE FORCE.

(Webmaster - the lens should screw on and off very easily. Two other possible

problems, dirt on the screw part of the lens or the lens has been "cross threaded" It

was not put on straight and is ruining the threads of the lens. Check the lens for any

"white areas" around the threads. They are painted black and white threads can be

an indication that the metal is being cut.)

Problem: SHUTTER WILL NOT RELEASE.

Possible cause: Film Advance lever not advanced far enough. A full stroke is necessary

for cocking the shutter. However, a ratchet incorporated within the advance mechanism

will allow you to accomplish a full wind in a series of short strokes.

If any problem listed above cannot be solved in the manner suggested, do not attempt to

repair your camera. Take it, or send it, instead, to your nearest service station. A minor

problem could possibly be aggravated by tampering.

METER CUT OFF POINTS

The Mamiya/Sekor 1000 DTL

incorporates automatic

disengagement or cut off points

for the metering system at

varying ASA/shutter speed

settings. When a certain

combination of shutter speed and

ASA points is reached, both

metering systems (spot system

and averaging system) are

disconnected, and in turn the

needle immediately moves

upward above the plus (+)

reference symbol (refer to Figure

W). Changing the shutter speed

or ASA setting will reengage the

metering system.

(Webmaster - This means that certain combinations of film ASA and shutter speeds can

not correctly determine a correct exposure. The manual gives no reference points for this

but as I remember: ASA 400 film would meter down to 1/8 of a second. ASA 800 to

1/15 a second)