Status led’s dc voltage test points – Teledyne GFC-7001E - Trace CO Analyzer User Manual

Page 276

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Troubleshooting & Repair

Model GFC7001E Carbon Dioxide Analyzer

Teledyne Analytical Instruments

276

13.1.4.3. Relay Board Status LED’s

There are eight LED’s located on the Relay Board. The most important of which is D1, which indicates the
health of the I

2

C bus. If D1 is blinking the other faults following LED’s can be used in conjunction with DIAG

menu signal I/O to identify hardware failures of the relays and switches on the relay (see Section 13.1.3 and
Appendix D).

Table 13-4: I

2

C Status LED Failure Indications

LED

FUNCTION

FAULT STATUS

INDICATED FAILURE(S)

D1

(Red)

I

2

C bus Health

(Watch Dog

Circuit)

Continuously ON

or

Continuously OFF

Failed/Halted CPU
Faulty Motherboard, Keyboard or Relay Board
Faulty Connectors/Wiring between Motherboard,
Keyboard or Relay Board
Failed/Faulty +5 VDC Power Supply (PS1)

STATUS LED’s

DC VOLTAGE TEST

POINTS

RELAY PCA

PN 04135

Figure 13-5:

Relay Board Status LEDs

See also other documents in the category Teledyne Equipment: