Kodak Ektapro Slide Projector 4020 - Manual (Page 45)

Tray Motion Sequence:
a) Go To Zero Position Projector Status: - Energized
Signal from: - P-Bus (Model´s 4020 and 5020 input only)
- Auto Zero (Model 9020 and 9020/CINE)
The MICROCONTROLLER selects shortest distance to the zero
position.
The TRAY MOTOR is energized.
The TRAY MOTION CONTROL delivers a step signal for each MOTOR
step.
The ZERO SENSOR delivers a signal if the position is reached
Failure: A failure code is written into memory.
The power LED is blinking.
The position is reached. The TRAY POSITION in memory set to zero.
Close Shutter, Autofocus off, Move Slide
LIFTER in up position
Shortest
distance to Zero
?
Yes
No No
Zero Sensor
actuated
?
Stop Tray Motor
Slide LIFTER Down
Set Tray Position
to Zero
END
Tray Motor ON
Reverse
Tray Motor On
Forward
More than
4 Step Signals
missed ?
No
Yes
Transport Failure
Write failure
into Memory
Projector does
not Operate
Zero Button
Power LED Blinking
figure 3-7
SM 2547-1 Service Manual
Kodak AG, Stuttgart 3-9 03/98