Klein 5000 SERIES Operation And Maintenance Manual page 151

To power up the TPU and verify proper operation of the TPU and LAN:
1. With the towfish and LAN cables removed from the TPU, turn the power on. This
will test the basic TPU.
On the DSP board,
• Light A will light, then go off.
• Light B will light, then go off.
• Light C will light, and lights A and B will flicker.
• VME light stays off.
On the Demultiplexer board,
• LOCK LOSS light will be off.
• ERROR light will light and stay on.
On the CPU board,
• CPU, BFL, SCSI BUSY, PIB BUSY will all light.
• SCSI BUSY, PIB BUSY will go out.
• CPU light will blink off and then come back on.
• CPU, BFL will both go off, and then the CPU light will come back on and
stay on.
2. Turn the TPU off.
Transceiver and Processing Unit
D-37