KEPCO JQE 150-1.5MVPY-26956 Half Rack - Manual (Page 47)

JQE SPECIAL SVC 081111 6-1
SECTION 6 - MAINTENANCE
6.1 GENERAL
This section covers maintenance procedures, installation of optional components, calibration
and test measurements of the JQE Special Power Supplies. Conservative rating of components
and the non-congested layout should keep maintenance problems to a minimum. If trouble does
develop however, the easily removed wrap-around cover and the plug-in feature of the circuit
boards provide exceptional accessibility to all components of the supply.
6.2 DISASSEMBLY/REASSEMBLY (REFER TO FIGURE 6-1.)
WARNING
Turn power off and disconnect unit from
power source before disassembling.
6.2.1 COVER REMOVAL
The wrap-around cover may be taken off by loosening and removing its twelve (12) holding
screws, five (5) on each side and two (2) on the front panel.
6.2.2 A1 CIRCUIT BOARD REMOVAL
The A1 printed circuit board is mounted with two (2) screws and either two (2) or six (6) washers
as shown in Figure 6-1, which are removed from the side. Set aside hardware for reassembly.
After removal of the four printed circuit board edge connectors and 3-wire cables from A1J1 and
A1J2, the board may be lifted from its slide-guide.
REASSEMBLY NOTES: A1 circuit board is floating; be sure to reassemble the hardware as
shown in Figure 6-1 to maintain electrical isolation from the bracket and avoid inadvertent
shorts.
FIGURE 6-1. A1 PC BOARD, REASSEMBLY