Figure 11-4: Sync/Demod Board Status Led Locations; Table 11-3: Sync/Demod Board Status Failure Indications - Teledyne 300E Instruction Manual

TROUBLESHOOTING & REPAIR PROCEDURES
11.1.4.2. Sync Demodulator Status LED's
Two LED's 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 11-3: Sync/Demod Board Status Failure Indications

LED Function
D1 M/R Sensor
Status
D2 Segment
Sensor Status
JP4 Connector to Opto-Pickup

Figure 11-4: Sync/Demod Board Status LED Locations

196
Fault Status
LED is stuck
ON or OFF
LED is stuck
ON or OFF
Board
Model 300E Carbon Monoxide Analyzer
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)
D1 – M/R Sensor Status
D2 – Segment Sensor Status
Instruction Manual
P/N 04288 Rev: A