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Teledyne t320u Manuale Utente

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Troubleshooting and Service 
Teledyne API – Model T300/T300M CO Analyzer 
264 
12.1.4.2. SYNC DEMODULATOR STATUS LEDS 
Two LEDs located on the Sync/Demod Board and are there to make it obvious that the 
GFC Wheel is spinning and the synchronization signals are present: 
Table 12-3:  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/Faulty +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/Faulty +5 VDC Power Supply (PS1) 
 
 
 
D1 – M/R Sensor Status 
D2 – Segment Sensor Status 
JP4 Connector to Opto-Pickup 
Board 
 
Figure 12-4: 
Sync/Demod Board Status LED Locations 
06864B DCN6314