SCR Component Checks
PS S5.3 5230
F-code Section C-code
Version no T-code
001
© BT Products
183
Service Manual 1997-04-15
8. Filter Block (23FIL, etc.)
To check, disconnect all wires from the filter block on removal
from panel. With VOM on the Rx10,000, touch the leads to
the filter terminals change the filter. After a few seconds,
reverse the meter leads and touch the filter terminal. The
VOM needle will deflect and return to infinity. If this capacitor
action is not observed, replace the filter block.
9. Filter Block (23FIL, etc.)
Filter block test 4K is only to detect an open or shorted filter. If
the control has symptoms as in 1E, interchange 22REC and
25REC and try again. If the problem is corrected, the old
25REC is marginal and should be replaced. If the problem is
not corrected, replace both filters.
10. 1X Choke and Reactor T3-T4
Refer to panel wiring diagram to locate windings. With VOM
on Rx1 scale, measure choke or reactor winding. Reading
should be less then 1 ohm.
11. Replacement of EV100
Components
When replacing stud semiconductors such as 3REC and
4REC, it is not necessary to torque these devices to a specific
valve.
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