Using The Internal Electronic Status Leds; Cpu Status Indicator; Relay Pca Status Leds; C Bus Watchdog Status Leds - Teledyne T700 Operation Manual

Teledyne API – Model T700 Dynamic Dilution Calibrator

9.3. USING THE INTERNAL ELECTRONIC STATUS LEDS

9.3.1. CPU STATUS INDICATOR

9.3.2. RELAY PCA STATUS LEDS

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9.3.2.1. I

C Bus Watchdog Status LEDs

Table 9-4: Relay PCA Watchdog LED Failure Indications

LED Function
2
D1 I
(Red) (Watchdog Circuit)
If D1 is blinking, then the other LEDs can be used in conjunction with DIAG Menu Signal I/O to identify hardware
failures of the relays and switches on the Relay.
06873B DCN6388
Several LEDs are located inside the instrument to assist in determining if the calibrators
2
CPU, I C bus and Relay PCA are functioning properly.
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 – 60 seconds, DS5 should flash on and off. If DS5 does not flash
then the program files may have become corrupted; contact customer service because it
may be possible to recover operation of the calibrator. If after 30 – 60 seconds, DS5 is
flashing. then the CPU is bad and must be replaced.
Motherboard

Figure 9-2: CPU Status Indicator

There are seven LEDs located on the Relay PCA. Some are not used on this model.
The most important is D1, which indicates the health of the I
Fault Status
C bus Health Continuously ON
or
Continuously OFF
Troubleshooting and Service
CPU Status LED
Indicated Failure(s)
Failed/Halted CPU
Faulty Mother Board, Valve Driver board or Relay PCA
Faulty Connectors/Wiring between Mother Board, Valve
Driver board or Relay PCA
Failed/Faulty +5 VDC Power Supply (PS1)
2
C bus).
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