D. Star Tester Controls and Indicators
The Star Tester #12650-2 is used to check exposure and timing related parameters of Polaroid
cameras. This section deals exclusively with the 636 Polaroid Camera. The light box and the
electronics required to compute and display exposure, timing and functional test measurements
are housed in a single chassis (see Fig. 6).
Presented below are the functions of the controls and indicators on the Star Tester. Refer to
Figure 6.
KEY CONTROL/INDICATOR FUNCTION
1 Disc Position Lamps Not used
2 Reset Button Clears Tester electronics
between tests.
3 Disc/Ride Time Switch Not used for 636
4 Test Selector Switch Selects test mode (8 for 600
cameras, 3 for other cameras)
5 Horn Volts Selector Allows selecting supply
Switch voltage of 5V (low), 6V (nom),
6.8V (high). Simulates film
pack battery.
6 20 Volt/2000 Volt Used in conjunction with volt
Selector probe jack (key 7) and DC volt
meter (key 9); allows Tester
to be used as voltmeter.
7 Volt Probe Jack Accepts standard probe for
checking DC voltages in
cameras under test.
8 Timing Meter Provides digital readout of
strobe recycle time and flash
timing.
9 DC Volts Meter Provides digital readout of
circuit voltages. May also be
used with probe in Volt Probe
jack (key 7).
10 Stops Error Meter Provides digital readout of
ambient & strobe exposure.
11 DC Current Meter Provides digital readout of
input energy (amp/secs) during
flash charge in ZLS mode. May
also be used to monitor
drain in other test modes.
92
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