Keithley 2015, Service Manual, Page: 66 / 158

Troubleshooting 4-3
Repair considerations
Before making any repairs to the Model 2015, be sure to read the following considerations.
CAUTION The PC-boards are built using surface mount techniques and require spe-
cialized equipment and skills for repair. If you are not equipped and/or
qualified, it is strongly recommended that you send the unit back to the fac-
tory for repairs or limit repairs to the PC-board replacement level. Without
proper equipment and training, you could damage a PC-board beyond
repair.
• Repairs will require various degrees of disassembly. However, it is recommended that
the Front Panel Tests be performed prior to any disassembly. The disassembly instruc-
tions for the Model 2015 are contained in
Section 5 of this manual.
• Do not make repairs to surface mount PC-boards unless equipped and qualified to do so
(see previous CAUTION).
• When working inside the unit and replacing parts, be sure to adhere to the handling pre-
cautions and cleaning procedures explained in
Section 5 .
• Many CMOS devices are installed in the Model 2015. These static-sensitive devices
require special handling as explained in
Section 5 .
• Whenever a circuit board is removed or a component is replaced, the Model 2015 must
be recalibrated. See
Section 2 for details on calibrating the unit.