Introduction - GE CTF878 User & Service Manual

Introduction

Parts Replacement
The electronics console of the CTF878 has been designed to permit
easy on-site upgrades and parts replacement. See Figure 5-1 on
page 5-9 and Figure 5-2 on page 5-10 for details. The instructions in
this chapter, along with a few common tools, are all that is required to
perform the following tasks:
•
fuse replacement
•
printed circuit board (PCB) removal and installation
•
option card installation
•
LCD display replacement
Prior to performing any maintenance procedures, be sure
to disconnect the main power from the unit.
Note: For compliance with the European Union's Low Voltage
Directive (2006/95/EC), this unit requires an external power
disconnect device such as a switch or circuit breaker. The
disconnect device must be marked as such, clearly visible,
directly accessible, and located within 1.8 m (6 ft) of the
CTF878.
An aluminum shroud over the printed circuit board shields the
electrical components and serves as a location for the wiring diagram
label. All of the procedures discussed in this chapter, except for fuse
replacement, require removal of this shroud.
Note: For compliance with the European Union's Low Voltage
Directive (2006/95/EC), a transparent plastic shroud protects
the electrical connections. The shroud must remain in place,
except while wiring the unit. Reinstall the shroud after the
wiring has been completed.
Use Figure 5-1 on page 5-9 and Figure 5-2 on page 5-10 to locate the
relevant components, while completing the following procedures.
IMPORTANT:
Keep a detailed record all service procedures
performed on the CTF878 in Appendix A, Service
Record. This service history may prove very helpful
in diagnosing any future problems.
!WARNING!
February 2009
5-1