Figure 1-21. Location of developer heater safety thermostat.
(j) You check the power to the dryer heaters at TS3, located on the
right side of the dryer assembly. Turn the dryer temperature dial up and the developer
temperature dial down. Press the film switch to activate full power to the dryer. led DS2
on PC board J3 should light. Check for line voltage between TS3-3 and TS3-9, when
DS2 is lit. Turn down the dryer temperature dial and check for no voltage, when DS2 is
not lit. If there is voltage between TS3-3 and TS3-9 when DS2 is not lit, the triac is
shorted and you must replace it. See figure 1-22.
Figure 1-22. Location of terminal strip TS3.