Keithley 237

3 8 2
Diagnostics
341
38.3
Power Supply Checks
343
3.8Ä Analog Control Lines
344
3.8.5 Analog Switching
344
3.86 Digital and Display Checks 3-16
SECTION 4 =
Principles of
Operation
4.1
INTRODUCTION 4-1
4.2
ANALOG CIRCUITRY 4-2
4.2.1 V/I Control and
Readback
4-2
4.2.2
Output
Stage 4-4
42.3
V/I
Feedback
4-6
4.2.4
Resonant
Converter
(Model 237)
4-8
4.3
A/D
CONVERTER
4-8
4.4
DIGITAL
CIRCUTTRY
4-9
44.1
I/O Controller
4-9
4.42
Source/Measure Controller
4-10
44.3
Communications
4-10
4.4A
Display
Circuitry
4-10
4.5
POWER SUPPLY
4-11
SECTION
5 Replaceable Parts
51
INTRODUCTION
5-1
5.2 PARTS
LISTS
5-1
5,3
ORDERING
INFORMATION
5-1
5,4
FATORY
SERVICE
5-1
5,5
SCHEMATIC
DIAGRAMS
AND
COMPONENT LOCATION
DRAWINGS 5-1