Onwa KR-1338 Service Manual page 46

Flow chart 3
Heading data format.
'
NMEA 0183 s
HDT,HDM,HDG
Blank
Heading data
indication.
***.*
Turn power OFF and ON.
OK?
OK
Heading data from heading
sensor momentarily interrupted.
Faulty pcb MAIN-0910 or
wrong heading data format.
42
Symptom: No heading data.
Check HDT,HDM,HDG
output setting.
OK?
OK
NG Check HDT, HDM,
HDG output
Check HDT,HDM,HDG
Heading data from heading
output setting.
sensor temporarily interrupted.
NG
OK?
OK
Blank
Heading data indication
***.*
Turn power off and on.
NG
OK?
OK
(Normal)
setting.
Faulty heading sensor or
its interconnection cable.
Check CLK data at HDG
connector #3,#4 on
displau unit
NG
OK?
OK
Faulty pcb SPU-9211
Faulty heading
sensor or its
interconnection
cable.