Status Leds; Motherboard Status Indicator (Watchdog); Cpu Status Indicators; Figure 11-3: Cpu Status Indicator - Teledyne t100 Operation Manual

Teledyne API - T100 UV Fluorescence SO
11.2.

STATUS LEDS

11.2.1.

MOTHERBOARD STATUS INDICATOR (WATCHDOG)

11.2.2.

CPU STATUS INDICATORS

06807F DCN7335
Analyzer
2
Several color-coded, light-emitting diodes (LEDs) are located inside the instrument to
determine if the analyzer's CPU, I
functioning properly.
DS5, a red LED on the upper portion of the motherboard, just to the right of the CPU
board, flashes when the CPU is running the main program. After power-up, DS5 should
flash on and off about once per second. If characters are written to the front panel
display but DS5 does not flash then the program files have become corrupted. Contact
Teledyne API's Technical Support department.
If DS5 is not flashing 30 - 60 seconds after a restart and no characters have been written
to the front panel display, the firmware may be corrupted or the CPU may be defective.
If DS5 is permanently off or permanently on, the CPU board is likely locked up and
should the analyzer not respond (either with locked-up or dark front panel), then replace
the CPU.
The LEDs on the CPU card (Figure 12-14) are described as follows:
Power LED
IDE LED
2
C communications bus and relay board are
Motherboard
Figure 11-3: CPU Status Indicator
Red normally lit
Green lit when active (read or write)
Troubleshooting & Service
CPU Status LED
227