Teledyne T100, Instruction Manual, Page: 274 / 404

Troubleshooting & Repair Teledyne ML - T100 UV Fluorescence SO2 Analyzer
274 06807A(DCNxxxx)
J2: Power
Configuration
Jumper
Figure 10-4: Location of Relay Board Power Configuration Jumper
AC Configuration of the pump is accomplished via an in-line, hard wired, set of
connections. Call Teledyne ML’s Customer Service Department for more information.
10.6.2. DC POWER SUPPLY
If you have determined that the analyzer’s AC main 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, which convert AC power to 5 and ±15 V (PS1) as well as +12 V DC
power (PS2). The supplies can either have DC output at all or a noisy output (fluctuating).
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 Table 10-4.
Table 10-4: DC Power Test Point and Wiring Color Code
NAME TEST POINT# COLOR DEFINITION
DGND 1 Black Digital ground
+5V 2 Red
AGND 3 Green Analog ground
+15V 4 Blue
-15V 5 Yellow
+12V 6 Purple
+12R 7 Orange 12 V return (ground) line
A voltmeter should be used to verify that the DC voltages are correct as listed in Table
10-4. An oscilloscope, in AC mode and with band limiting turned on, can be used to
evaluate if the supplies are excessively noisy (>100 mV peak-to-peak).