TELEDYNE API T100U, Addendum To The Operation Manual

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Troubleshooting and Service Teledyne API - T100U Manual, Addendum to T100 Manual P/N 06807
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8.3.3 REPLACING THE PMT, HVPS OR TEC
The PMT should last for the lifetime of the analyzer. However, in some cases, the high
voltage power supply (HVPS) or the thermo-electric cooler (TEC) may fail. To replace
the PMT, the HVPS or the TEC:
Figure 8-3: PMT Assembly - Exploded View
1. Power down the analyzer, disconnect the power cord, remove the cover and discon-
nect all pneumatic and electrical connections from the sensor assembly.
2. Remove the entire sensor module assembly from the analyzer.
3. Remove the fluorescence cell assembly.
4. Remove the two connectors on the Sync Demod board.
5. Remove the Sync Demod Board (6 screws with plastic washers). Disconnect the
electrical connector that leads to the preamp board further inside the housing.
6. Remove all of the desiccant bags inside the PMT housing.
7. Along with the plate, slide out the OPTIC TEST LED and the thermistor that
measures the PMT temperature.
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The thermistor will be coated with a white, thermal conducting paste. Do not
contaminate the inside of the housing or the PMT tube with this grease.
06840B DCN 6201