Figure 8-3: Cpu Status Indicator; Table 8-3: Sync/Demod Board Status Failure Indications - Teledyne T360 Operation Manual

Troubleshooting and Service
8.1.4.1. CPU STATUS INDICATOR
8.1.4.2. SYNC DEMODULATOR STATUS LED'S

Table 8-3: Sync/Demod Board Status Failure Indications

LED FUNCTION
M/R Sensor Status
D1
(Flashes slowly)
Segment Sensor
Status
D2
(Flashes quickly)
232
DS5, a red LED, that is located on upper portion of the motherboard, just to the
right of the CPU board, flashes when the CPU is running the main program loop.
After power-up, approximately 30 to 60 seconds, DS5 should flash on and off. If
characters are written to the front panel display but DS5 does not flash then the
program files have become corrupted. If after 30 – 60 seconds neither the DS5 is
flashing or no characters have been written to the front panel display then the
CPU is bad and must be replaced.
Motherboard
Figure 8-3:
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:
FAULT STATUS
LED is stuck
ON or OFF
LED is stuck
ON or OFF
Teledyne API Model T360/T360M Operation Manual
CPU Status LED
CPU Status Indicator
INDICATED FAILURE(S)
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)
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)
07272B DCN6552