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Teledyne API Model T360/T360M Operation Manual Troubleshooting and Service
247
8.5. SUBSYSTEM CHECKOUT
The preceding s of this manual discussed a variety of methods for identifying
possible sources of failures or performance problems within the analyzer. In
most cases this included a list of possible causes. This describes how to
determine individually determine if a certain component or subsystem is actually
the cause of the problem being investigated.
8.5.1. AC Mains Configuration
The analyzer is correctly configured for the AC mains voltage in use if:
1. The Sample Pump is running.
2. The GFC wheel motor is spinning. LED’s D1 & D2 (located on the
synch/demod PCA) should be flashing.
3. If incorrect power is suspected, check that the correct voltage and frequency
is present at the line input on the rear panel.
If the unit is set for 230 VAC and is plugged into 115VAC, or 100VAC the
sample pump will not start, and the heaters will not come up to
temperature.
If the unit is set for 115 or 100 VAC and is plugged into a 230 VAC
circuit, the circuit breaker built into the ON/OFF Switch on the Front
Panel will trip to the OFF position immediately after power is switched
on.
8.5.2. DC Power Supply
If you have determined that the analyzer’s AC mains power is working, but the
unit is still not operating properly, there may be a problem with one of the
instrument’s switching power supplies. The supplies can have two faults, namely
no DC output, and noisy output.
To assist tracing DC Power Supply problems, the wiring used to connect the
various printed circuit assemblies and DC Powered components and the
associated test points on the relay board follow a standard color-coding scheme as
defined in the following table:
Table 8-6: DC Power Test Point and Wiring Color Codes
NAME TEST POINT# TP AND WIRE COLOR
Dgnd
1
Black
+5V
2
Red
Agnd
3
Green
+15V
4
Blue
-15V
5
Yellow
+12R
6
Purple
+12V
7
Orange
07272B DCN6552