TRANSFORMERS (con’t)
Stepper Drive Transformer
1. Locate the two terminal blocks with the Red
wires connected to the transformer (Figure 3-
65).
Note: Location and orientation will vary
depending on model.
2. With a DVOM set to test for continuity, probe
the two front terminal blocks and the two rear
terminal blocks. Both should indicate continuity.
(Figure 3-66).
3. Reconnect machine to power and turn machine
on.
4. Set your DVOM measure 120 VAC. Probe the
two terminal blocks connected to the Black
wires from the transformer. The DVOM should
indicate 120 VAC. If it does not, troubleshoot
the wiring from the main DIN Rail (located
under the frame guard behind the display,
where terminals, PLC, and fuse blocks are
snapped onto).
There are no adjustments necessary on
transformers.
ADJUSTMENT
Figure 3-66 Testing two front terminal blocks
SX
™
Service and Maintenance Manual 3-24 960714-02B © 2007 I2407
SECTION 3 – COMPONENT REPAIR
ELECTRICAL COMPONENTS
Figure 3-65 Print Head Stepper Drive
Note: Electrical assembly isolated for clarity
Stepper
Transformer
Terminal
USE EXTREME CAUTION WHILE SERVICING A
MACHINE WHILE POWER IS APPLIED.
UNEXPECTED MACHINE STARTUP CAN
CAUSE SERIOUS INJURY.
WARNING
DO NOT ATTEMPT TO SERVICE THE MACHINE
DURING NORMAL OPERATION. KEEP HANDS
AND ARMS CLEAR OF MOVING PARTS.
WARNING
WHEN TESTING ELECTRICAL COMPONENTS
WHILE POWER IS APPLIED TO THE MACHINE,
USE PROPER TROUBLESHOOTING
TECHNIQUES TO AVOID ELECTRICAL SHOCK.
WARNING