Keithley 2015 Service Manual page 9

Analog circuitry ........................................................................... 4-11
Distortion digital circuitry ............................................................ 4-13
Distortion analog circuitry ........................................................... 4-15
Sine generator circuitry ................................................................ 4-16
Troubleshooting ............................................................................... 4-18
Display board checks ................................................................... 4-18
Power supply checks .................................................................... 4-19
Digital circuitry checks ................................................................ 4-20
Analog signal switching states ..................................................... 4-21
5
Disassembly
Introduction ........................................................................................ 5-2
Handling and cleaning ....................................................................... 5-3
Handling PC boards ....................................................................... 5-3
Solder repairs ................................................................................. 5-3
Static sensitive devices ................................................................... 5-4
Assembly drawings ............................................................................ 5-5
Disassembly procedures .................................................................... 5-6
Case cover removal ........................................................................ 5-6
DMM board removal ...................................................................... 5-6
DSP board removal ........................................................................ 5-7
Front panel disassembly ................................................................. 5-8
Removing power components ........................................................ 5-8
Instrument reassembly ....................................................................... 5-9
Input terminal wire connections ..................................................... 5-9
Power module wire connections .................................................... 5-9
Changing trigger link lines .............................................................. 5-10
Main CPU firmware replacement .................................................... 5-11
6
Replaceable Parts
Introduction ........................................................................................ 6-2
Parts lists ............................................................................................ 6-2
Ordering information ......................................................................... 6-2
Factory service ................................................................................... 6-2
Component layouts ............................................................................ 6-2
A
Specifications
Accuracy calculations ....................................................................... A-9
Calculating DC characteristics accuracy ....................................... A-9
Calculating AC characteristics accuracy ....................................... A-9
Calculating dBm characteristics accuracy .................................. A-10
Calculating dB characteristics accuracy ...................................... A-10
Distortion characteristics ............................................................. A-11