SECTION TWO - Inst allation
Page 32 961 INSTALLATION MANUAL Revision A
1. Press and hold the PWR key for three seconds, and the 961 will turn
off.
To turn off an entire system (the two heads and the processor) with two
control heads that are on:
1. Press and hold the PWR key for approximately two seconds until the
POWER-OFF dialog appears, as shown.
2. To turn off only one head (where you pressed the PWR key, press the
THIS HEAD key. Otherwise, to turn off the entire system, press the
BOTH HEADS key.
Testing and troubleshooting the 961
To test the system after installation, first apply power to the control head:
Pressing the control head’s PWR key automatically turns the entire sys-
tem on, including the processor. Next, check for the presence of GPS and
DGPS signals: For GPS signals, the time-to-first-fix (TTFF) is about two to
five minutes; for DPGS signals, it may take at least 20 minutes for the first
channel of the 961’s internal beacon receiver to lock onto a transmit-
ter–keep checking for the presence of the word DGPS in the upper-left
corner of the CHART screen.

Troubleshooting

common

installation

problems

Typical problems you may encounter during or after the installa tion pro-
cess are outlined i n Tables 2, 3, an d 4. If you’ve followed th e troubles hoot-
ing steps below and are still experiencing difficulties, call th e Northstar
Service Department at 978-897-6600 and ask to speak with a marine ser-
vice technician.

Table 2: Troubleshooting the installation

Problem Area Symptom Possible Solutions/Reasons
POWER Pressing the PWR button doesn’t power-up
the unit.
•Check the fuse and the power to the
head.