Troubleshooting; Trouble Detection And Solution - Hitachi SD.LINK User Manual

6.6 Troubleshooting

6.6.1 Trouble detection and solution

The transmit LED (TX) does not glow.
• Is the power supply module POWER LED on?
If the POWER LED is off, power is not available. Switch on the power.
• Has the error LED (ERR) not glowed?
If the ERR LED is on, some error is present. See "6.6.2 Error display and
countermeasures."
• Is the receive LED (RX) on?
If the RX LED is on, the module may have failed. See "6.6.2 Error display and
countermeasures."
The transmit LED (TX) is off and the receive LED (RX) is off on all modules.
• Are the optical fiber cables connected properly?
Verify the correct connection of the optical fiber cables.
• Are the optical fiber cable connectors inserted properly?
Verify the correct insertion of the optical fiber cables connector keys in slots.
The receive LED (RX) does not glow.
• Is the transmit LED (TX) on?
If the TX LED is off, see the explanation of "The transmit LED (TX) does not glow."
• Is the optical fiber cable properly?
Verify the correct connection of the optical fiber cable as specified in " 3.4 Wiring."
• Is the optical fiber cable not broken or bent?
Optical fiber cables are fabricated of optical fibers. Bending optical fiber cables past their
defined bending radius would inhibit communication (see Figure 3-4).
• Is the remote module transmitting?
The receive LED (RX) won't glow unless the remote module is transmitting.
Data is not transmitted from a remote module.
• Is the remote module switched on?
If the remove module is switched off, switch it on.
• Is the remote module transmitting?
If the transmit LED (TX) is off, see the explanation of "The transmit LED (TX) does not
glow."
• Is the remove module switch set to RUN?
Memory transfers would not execute if the CPU or LPU module switch is not set to RUN.
6-13
6 MAINTENANCE