Allen-Bradley 1336 IMPACT - Test 1 - Testing Input Rectifier SCR1

4–3Component Test Procedures
Publication 1336 IMPACT-6.2 – March 1998
Input Rectifier SCR1 is located on the bottom of the heat sink.
Figure 4.1
Input Rectifier Test
AB0328B
3
2
1
22
21
23
A
B
C
13
11
12
!
ATTENTION: Disconnect and lock out power from
the drive before disassembling the drive. Failure to
disconnect power may result in death or serious injury.
Verify bus voltage by measuring the voltage between
+DC and –DC on terminal block TB1. Do not attempt
to service the drive until the bus voltage has discharged
to zero volts.
Important: Before you remove connections and wires from the
drive components, mark the connections and wires to
correspond with their component connections and
terminals to prevent incorrect wiring during assembly.
Test 1 – Testing Input
Rectifier SCR1