6 August 2014
Notice : GPS Week Number Rollover
To JRC Global Positioning System (GPS) users:
Thank you for using our products.
We would like to announce that GPS week number rollover is to occur on some of our GPS' on 17th August 2014.
The week number counter in GPS resets once every 1023 weeks, which is approximately 19.6 years. The week number counters for the GPS in the discontinued models below started their week count from the 1st January 1995. It is on the 17th August 2014 at 0:00 AM (UTC) that the week number counters rollover will occur.
The subject models are designed not to turn the clock back 19.6 years, and will continue to work correctly under normal use.
However, please note that time and date will go back to the starting date above when a master-reset of equipment or a battery replacement is carried out. In this case, customers are required to configure the initial settings.
| Equipment | Models | Subject Serial No. | Note |
| GPS Navigators | JLR-4110MK2 | Up to KC57185 |
Navigators affected by the rollover in 2008, where a ROM was replaced in receiver* JLR-4110MkII Initial setting procedure JLR-6800 Initial setting procedure |
| JLR-6800 | Up to KD40400 | ||
| JLR-4110MK2 | KC57186 and later | JLR-4110MkII Initial setting procedure | |
| JLR-6800 | KD40401 and later | JLR-6800 Initial setting procedure | |
| JLR-7700 | All | JLR-7700 Initial setting procedure | |
| GPS receiver | JLR-4320 / 4321 | All | NWZ-4551 / J-NAV500 Initial setting procedure NWU-800 Initial settings procedure |
*If the GPS receiver converting kit was attached for the rollover in 2008, next rollover will be 8th September 2024.
Other GPS equipments are NOT subjected to this rollover in 2014.
For more information, and countermeasures, please contact our service agents or sales representatives.
Contact
Marine Electronics Business Department (Japan)
Tel: +81-3-6832-1807 / Fax: +81-3-6832-1845
Amsterdam Branch Office
Cessnalaan 40-42, 1119 NL, Schiphol-Rijk, The Netherlands
Phone: +31-20-658-0750 / Fax: +31-20-658-0755
Seattle Branch Office
1011 SW Klickitat Way, Suite 201B, Seattle, WA 98134, U.S.A
Phone: +1-206-654-5644 / Fax: +1-206-654-7030
E-mail for general inquiries
For further information: please contact
Japan Radio Co.,Ltd.
Marine Electronics Business Department (Japan)
Tel: +81-3-6832-1807 / Fax: +81-3-6832-1845
Amsterdam Branch Office
Cessnalaan 40-42, 1119 NL, Schiphol-Rijk, The Netherlands
Phone: +31-20-658-0750 / Fax: +31-20-658-0755
Seattle Branch Office
1011 SW Klickitat Way, Suite 201B, Seattle, WA 98134, U.S.A
Phone: +1-206-654-5644 / Fax: +1-206-654-7030