TELEDYNE API T300M - Sync Demodulator Status Leds; Table 5-6. Sync;Demod Board Status Failure Indications

118 Maintenance and Service 083730300A DCN8101
Motherboard
CPU Status LED
Figure 5-7. CPU Status Indicator
5.7.7 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 5-6. 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)