Troubleshooting and Service
Teledyne API – Model T300/T300M CO Analyzer
246
11.1.4.2.
SYNC DEMODULATOR STATUS LEDS
Two LEDs located on the Sync/Demod Board are there to make it obvious that the GFC
Wheel is spinning and the synchronization signals are present:
Table 11-3: Sync/Demod Board Status Failure Indications
LED
FUNCTION
FAULT STATUS
INDICATED FAILURE(S)
D1
M/R Sensor Status
(Flashes slowly)
LED is stuck
ON or OFF
GFC Wheel is not turning
M/R Sensor on Opto-Pickup Board failed
Sync/Demod Board failed
JP 4 Connector/Wiring faulty
Failed/5 VDC Power Supply (PS1)
D2
Segment Sensor
Status
(Flashes quickly)
LED is stuck
ON or OFF
GFC Wheel is not turning
Segment Sensor on Opto-Pickup Board failed
Sync/Demod Board failed
JP 4 Connector/Wiring faulty
Failed/5 VDC Power Supply (PS1)
Figure 11-4:
Sync/Demod Board Status LED Locations
06864D DCN7562
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