20 Most Recent JRC 1000 MKII Radar GPS Receiver Questions & Answers

Hi does any one have a scanner for a jrc1000 they would sell me please can not find one for sale anywhere.

Hello there,

I also need this very same power cable. Did you find one already? maybe you can tell me wich one of the 7 input connections is the + and - DC power connection so I can connect this thing myself with a home made power cable. Greetings. Stan (holland)
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Thanks!

As you look at the back of the display unit, the power plug has 7 connection posts.
Top left is pin 1 Bottom Right is pin 7
Pin 1 ..... + 12v
Pin 2 ..... - 12v
Pin 7 ..... Boat Ground

Rob

This is a bearing pulse error. Either the bearing pulse generator inside the motor is bad (Replace the motor) or it's in the radar cable or display.

Normally the bearing pulse comes from the bearing pulse generator built inside the motor. Every time the motor turns it sends a pulse down the line showing the radar that it is indeed spinning. There is also a Heading pulse that comes from an electric eye elsewhere in the housing. The other thing could be that the wire carrying the bearing pulse is not getting back to the display. More so than often, it's the motor. I would have the display sent out to be checked on a simulator if there is a marine electronicshop nearby.

found my fault not i the power cable in, but the interconnect to radar dome..approx 50mm from radar screen a break in the wire, found it just by wiggling the cable.. the set wont power up if the interconnect not connected or is faulty

If you have checked the magnetron current and it is normal, then the issue with the X band radar not showing target echoes could be due to a few reasons:

1. Antenna: Check the antenna for any physical damage or corrosion. A damaged antenna can cause a weak signal or no signal at all. If the antenna is damaged, it may need to be replaced.
2. Transceiver: Check the transceiver for any damage or malfunction. The transceiver is responsible for transmitting and receiving the radar signals. If it is not working properly, it may need to be repaired or replaced.
3. Cabling: Check the cabling for any damage or loose connections. Faulty cabling can cause a weak signal or no signal at all. Make sure all connections are secure and the cabling is not damaged.
4. Signal Processing Unit: Check the signal processing unit for any damage or malfunction. The signal processing unit is responsible for analyzing the radar signals and displaying the target echoes. If it is not working properly, it may need to be repaired or replaced.

If you are not comfortable troubleshooting the radar yourself, it may be best to contact a professional technician to diagnose and repair the issue.