Klein 3000 Quick Start Manual page 5

f. D7 and D8 are Klein Part Number 12000113
D9 and D10 are Klein Part Number 12000100
R9 and R10 are Klein Part Number 12100006.
4) If R11 on the TPU 200 VDC Power Supply PCB is the correct value and
again assuming that the 200 VDC is present at the Towfish and the
Computer and TPU are properly configured, the following steps can be
taken.
a. Referring to Section 4.22 on page 4-38 of the 3000 Troubleshooting
Guide for instructions on removing the electronics package from the
Towfish. If you havn't already done so, after removing the Nose
Cone from the Towfish, disconnect the Towfish Jumper Cable on
the Bulkhead and check for 200 VDC across pins 1 (200 VDC) and
2 (Return) using a DVM.
the 39 inch Towfish Jumper Cable.
b. After removing the electronics package, find R30 on the Multiplexer
PCB, Klein Part Number 14102051. R30, Klein Part Number
If the 200 VDC is not present, replace
If it is present continue to b.