Keithley 2700, Service Manual

Page: 105 / 174

Disassembly 5-7
Instrument reassembly
Reassemble the instrument by reversing the previous disassembly procedures. Make sure
that all parts are properly seated and secured, and that all connections are properly made. To
ensure proper operation, replace and securely fasten the shield.
WARNING To ensure continued protection against electrical shock, verify that power
line ground (green and yellow wire attached to the power module) and the
power transformer ground (black wire) are connected to the chassis. When
installing the power transformer, be sure to reconnect the black ground
wire to the mounting stud on side of the chassis. Be sure to install the bot-
tom case screws to assure a good case-to-chassis ground connection.
Input terminal wire connections
During reassembly, use the information in Table 5-1 to connect input terminal wires.
Power module wire connections
Use the information in Table 5-2 and DETAIL B of drawing 2700-050 to connect power
module wires.
Table 5-1
Input terminal wire colors
Input terminal Wire color
INPUT HI
INPUT LO
SENSE HI
SENSE LO
AMPS Red
Black
Yellow
Gray
White
Table 5-2
Power module wire colors
Location Wire color
Right side
Right top
Left top
Right bottom
Left bottom Gray
Violet
White
Red
Blue