Stern Pinball IRON MAN Service And Operation Manual page 60

SCHEMATICS, WIRING & PCBS
When a working OPTO is installed and connected in a game, the transmitter should light (LED1 lower & LED2 upper) when the
power is switched on. With the playfield in Service Position #1 (playfield lifted up and resting on the Playfield Support Slide Brack-
ets) and the game on, the LED lights should show up as BRIGHT RED RINGS through the back of the Receiver Board around the
Receivers LED1 & LED2 (see Fig. 1, previous page). Testing only LED2: TO PERFORM THIS TEST, A PINBALL MUST BE IN THE
BALL TROUGH. With the game in Switch Test Mode, lifting the Trough Plunger with a finger tip should block the BEAM on LED2
and cause the Switch Position to trigger (see Fig. 3). View Fig. 3a & 3b for a sectional view of the Light Path (note alignment) and
what happens as a "double stacked" ball scenario breaks the light beam.
If replacement of LED is required, insure that it is mounted correctly before and after
soldering (See Fig. 4a/4b).
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SECTIONAL VIEW FROM RIGHT (FIG. 2A & 2B)
TROUGH DUAL OPTO BOARDS ALIGNMENT/TEST FOR LED2
IMPORTANT
IRON MAN PRO VAULT EDITION MANUAL 500-55B0-01
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