Tester Functions, Controls & Indicators - Polaroid 636 Repair Manual

A. B-600 Tester functions, controls & indicators
The B-600 testing system is used to check exposure and timing-related parameters on 600 line
cameras. The electronics unit (Fig. 1) houses the circuits needed to set the parameters and to
display test results. The Model B light source provides the light levels required for ambient expo-
sure measurements.
The chart below shows the function of each of the controls and indicators on the electronics unit.
Following the chart are the pretest and test procedures. Note that the test procedures are set up
with detailed instructions in the left column and a summary in the right column. Once you have
become familiar with the test procedures, occasional reference to the summary should be all that is
necessary to properly test 636 cameras.
KEY CONTROL/INDICATOR
1 Power Switch
2 Camera Current Meter
3 Test Selector Switch
4 Stops Error Meter
5 Normal/Midcycle Switch
6 Horn Connector
7 BB Error LED
8 Strobe Detector/
9 Calibrate/Test Switch
10 Manual Reset Button
11 Mode Switch
12 Pack Simulator
Connection
13 Horn/Pack Simulator
Switch
FUNCTION
ON/OFF Switch: provides line voltage to Tester
A built-in lamp lights when the switch is ON.
Provides readout of camera DC current during a
camera cycle.
Used to select the various test modes.
Provides digital readout of test results.
(Reading is in stops error.)
Provides for a complete cycle or midcycle of a camera
on the horn.
Provides the electronic interface between
the B-600 horn and the electronics unit.
Provides a visual check of blade bounce
error in Model 610/620 cameras.
Provides electronic interface between Strobe/ Flash
Detector connector Flash Detectors and the electronics
unit.
Sets the electronics unit either for normal testing of 600
line cameras or for calibration of the electronics in
conjunction with a special calibration test box.
Used to clear the electronics when a camera is installed
on the horn.
Used to select exposure or aperture test mode.
Provides connection for power paddles, allowing the tester
to be used like a power supply.
Allows switching of electronics for testing
cameras on horn or with separate power paddle.
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