Satellite Compass
STD 21 GPS
Edition: Feb. 05, 2007
3717/110--850.DOC020002
88
4.2
Troubleshooting and Repair (for Service only)
(see also Fault/Alarm table section 3.7).
Following table could be helpful for a fault diagnostics.
This table has to be read together with figure A--2 in the appendix.
Information in the table below should only be
used by trained service personnel.
Pos.
No
Designation
Sense
1
Plug “C1”
Connection of Power supply for
Processor Unit
2
LED “POU”
Lights green for Operator Unit
supply (24VDC).
3
LED “PAU”
Lights green for Antenna Unit
supply (24VDC).
4
Jumper “X700”
Terminator for Interface RS422 at
plug A2.
Should be inserted in general.
5
Jumper “X600”
Terminator for Interface RS422 at
plug A1.
Should be inserted in general.
6
LED “PPS”
Blinks red with an interval of
1 second.
If blinking there is an usable sat-
ellite--information available.
LED could be dark for
appr. 20 minutes after switching
on.
7
LED 5 VDC
Lights green, if 5VDC are avail-
able.
Used for supplying the gyro
group and the accelerometer.
8
LED 3.3 VDC
Lights green, if 3.3VDC are avail-
able.
Used to supply piggy back proc-
essor.
9
Jumper “X204”
Development purpose only.
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