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M102E/M501 TRS TROUBLESHOOTING & REPAIR
(Addendum to M101E Manual - P/N 04740 Rev A)
5. Carefully remove the UV filter.
6. Install the UV filter. Handle carefully and never touch the filter’s surface. The UV filter’s wider
( ring ) side should be facing out. Install the UV filter retainer and tighten screws.
7. Install the shutter cover and minifit connector. Tighten 4 screws.
8. Re-plug J4 connector into the motherboard.
10.5.3. Replacing the PMT, HVPS or TEC
PMT Housing End Plate
This is the entry to the PMT Exchange
PMT Preamp PCA
High voltage Power Supply
(HVPS)
PMT
PMT Cold Block
Connector to PMT
Pre Amp PCA
12V Power
Connector
Cooling Fan
Housing
TEC Driver PCA
PMT Heat Exchange Fins
Li
g
ht from Reaction
Chamber shines
throu
g
h hole in side
of Cold Block
Insulation Gasket
PMT Power Supply
& Aux. Signal
Connector
PMT Output
Connector
Thermo-Electric Cooler
(TEC)
PMT Temperature
Sensor
O-Test LED
Figure 10-3: PMT Assembly - Exploded View
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:
1. Power down the analyzer, disconnect the power cord, remove the cover and disconnect all
pneumatic and electrical connections from the sensor assembly.
2. Remove the entire sensor module assembly from the.
05514 Rev A1 59