Rapid-Air STRAIGHTENER: SBX, SCX & SD SERIES - Manual (Page 17)

3. If running with external control
a. Check that the external/loop arm switch is in the external position.
4. Height switch setting too high.
a. Set height setting to “0”.
5. Percent speed pot set too low.
a. Adjust percent speed pot to 100%.
6. Fuses blown.
a. Check fuses & circuit breaker.
7. No AC voltage at DC drive board.
a. Check wiring
8. Check signal voltage between P2 to I2 on DC drive.
0-6 VDC—Ramm
0-9 VDC—Regen Drive
while moving dancer arm
a. If there is a signal, check continuity between I1 & 12
b. If no continuity, replace D.C. drive or call factory.
9. Check line voltage input of 69100034 board, 120 VAC, TB-1.
a. Check wiring. Call factory
10. Check pico fuse 69100034 board (f1).
a. Replace fuse, 1 amp pico fuse—call factory.
11. Check for 0-12 VDC between pin #1 (=V) and pin #2 (GND) of panduit connector TC3 on
board #69100034.
a. If no voltage present call factory.
12. Check for DC voltage between pin #6 (VO) and pin #2 (GND) of panduit connector TC3,
on board 69100034, while moving the dancer arm from minimum to maximum position.
a. If voltage is present, turn power off and check the ribbon cable connections between
panduit connector #TC3 of 69100034 board and panduit connector #TB-4 of 69100076
board. This should be a continuity check for tight connections. Call factory for assis-
tance.
b. If voltage is not present move on to step 13.
13. Check voltage between pin #5 of TB-6 & pin #3 of TB-5 on 69100076 board while moving
the dancer arm from minimum to maximum position.
a. If voltage varies 2.5-4 volt from minimum to maximum position, the dancer arm pot
is OK, but the 69100076 board could be defective. Call factory.
b. If voltage does not vary when moving the dancer arm from minimum to maximum
position—call the factory for assistance.