7 Service and Maintenance
60
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
NOTE: If measured voltages do not agree with these readings, it will be
necessary to correct this problem before proceeding further. In most cases,
correcting the power supply problem will correct the original problem as well.
Table 7-2 Power Supply Test Point Voltages
Test Point
Voltage (Vdc)
+5
+4.75 to +5.25
+20
+18 to +23
+12
+11.4 to +12.6
-12
-11.4 to -12.6
+180
+170 to +190
+220
+190 to +250
Figure 7-1
Power Supply Module - Top View
(Controller Cover Removed)
