CSH-5 problems

[Nick]

Hi,

I have two different problems on the sonar Furuno CSH-5. The ships were not together and is not easy to use components from one to the another.

Basically the first problem is as follows:

After pressing the power button a message appears on the screen "NO TRX". Transceiver is OK, because I connected the correct TRX. If I lift transducer by hand, and I press the POWER transducer rises and stops after UP limit switch activated, but still stands the same message on the screen. Power supply is OK.
Do you have some advice because I do not have any service documentation.

Another problem is on another ship. Sonar is CSH-5 also.

Sonar is mostly worked OK, but with tilt angles of less than 9 degrees appears strange echo or a false reflection in the second quadrant. Those echoes are in red and yellow and fills almost the entire second quadrant to 150m range. The same happens with other correct TRX. Furthermore this same sonar sometimes will not turn on !? Everything turns on normally but there is no any echo on the screen. I measured the voltage and was not stable, and the electricians changed automatic regulator on generator. After this, strange echo remains, and sonar can be turned on only if the output is switched from 9 to 10 or vice versa. It seems that the power supply is stable now, but I still can not solve these mysteries. Is there any advice for this case?

thank you in advance
Nick

 

[Snips]

Nick,
There are four models of CSH-5, first was the CSH-5, CSH-5MK2, CSH-5L and the CSH-5LBB. It would be nice to know exactly what model(s) the vessels have. Just know that all Furuno Omni sonar's are programmed not to TX in the up position which sounds like you are trying to do. I feel some of your description is getting lost in the translation of the problem. What is the vessel flag and next port of call?

Snips

 

[Nick]

Just know that all Furuno Omni sonar's are programmed not to TX in the up position which sounds like you are trying to do.

I know that, I`m not trying to do that.

There are four models of CSH-5, first was the CSH-5, CSH-5MK2, CSH-5L and the CSH-5LBB. It would be nice to know exactly what model(s) the vessels have.

I already wrote: both models are CSH-5.

Not much help with Your answers, I will try to explain step by step.

 

[Nick]

Snips,

Transducer is in UP position. Sonar is turned off. When I turn it on, the message "NO TRX"
appears. Transceiver is OK, fuses are OK.
Do You have advice?

Thanks
Nick

 

[Snips]

Nick,
Since the error "NO TRX" doesn't appear in any of the service manuals and the CSH-5 is close to 25 years old I just wanted to clarify that is exactly model in question.

Probably the error is TRX=NG instead of "NO TRX". This error relates to one of the three TAMP boards. Each board has a transmitter driver HIC (U1) that can prevent the +5, +/-12V in the transceiver from coming up. There was a small diode modification for systems built before 8/90 with SN 2619-0129 55khz or 2621-0017 68Khz.

Can you confirm the above information.

Snips