Keithley 2015 Service Manual

Troubleshooting 4-7
AC power is applied to the AC power module receptacle (J1009). Power is routed through the
line fuse and line voltage selection switch of the power module to the power transformer. The
power transformer has a total of four secondary windings for the various supplies.
AC voltage for the display filaments is taken from a power transformer secondary at F1 and
F2, and then routed to the display board.
Each DC supply uses a rectifier and a capacitive filter, and many supplies use an IC regulator.
Table 4-1 summarizes rectifier, filter, and regulator circuits for the various DC supplies.
Table 4-1
Power supply components
Supply Rectifier Filter Regulator
+5VD
+37V
+15V
-15V
+5V, +5VRL
+5VD2
+15VF
-15VF
+5VF
CR104
CR116, CR117
CR102
CR102
CR103
CR301
CR330
CR330
CR331
C128, C156
C104, C106
C148
C131
C146
C350
C562
C565
C568
U144
U101
U125
U119
U124
U331
U348
U349
U350

Keithley 2015 Specifications

General

Brand	Keithley
Model	2015
Category	Multimeter
Language	English