Rockwell Automation 1336S_F_E_T_R Transistor,Thyristor (SCR) Replacement - Manual

Service Instructions
Transistor and Thyristor (SCR) Replacement for
1336 PLUS, PLUS II, FORCE, IMPACT and
REGEN Drives
Description These instructions cover the proper method of replacing transistor and SCR
modules in the 1336 family of drives. Failure to properly prepare the
mounting surface or to torque the components to rated specifications will
result in decreased service life of the replacement components.
Contents Description Page
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Surface Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Thermal Grease Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Torque Mounting Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Torque Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety Precautions
!
ATTENTION: Some printed circuit boards and drive
components may contain hazardous voltage levels. Remove and
lock out power before you disconnect or reconnect wires, and
before you remove or replace fuses and circuit boards. 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.
!
ATTENTION: Potentially fatal voltages may result from
improper usage of oscilloscope and other test equipment. The
oscilloscope chassis may be at a potentially fatal voltage if not
properly grounded. If an oscilloscope is used to measure high
voltage waveforms, use only a dual channel oscilloscope in the
differential mode with X100 probes. It is recommended that the
oscilloscope be used in the A minus B Quasi-differential mode
with the oscilloscope chassis correctly grounded to an earth
ground.
!
ATTENTION: This assembly contains parts and
sub-assemblies that are sensitive to electrostatic discharge. Static
control precautions are required when servicing this assembly.
Component damage may result if you ignore electrostatic
discharge control procedures. If you are not familiar with static
control procedures, reference Allen-Bradley Publication
8000-4.5.2 Guarding Against Electrostatic Damage, or any other
applicable ESD protection handbook.