Inspection Of Each Board - Furuno FE-700 Service Manual

3.4 INSPECTION OF EACH BOARD

Board/Unit : MAIN board (02P6236)
Signal In/Out
FREQ Output
TX0/TX1 Output
KP Output
GAIN Output
IEC61162 Output
TD-A , TD-B
Measuring Points
ANLG Board
J4, #21 and GND
ANLG Board
J4, #29 and GND
J4, #30 and GND
MAIN Board
J6, #3 and J6, #4
ANLG Board
J4, #22 and GND
ANLG Board
J4, #17 and #18
16
3.4 INSPECTION OF EACH BOARD
Measured by
Oscilloscope 50 kHz :
200 kHz :
(L=0 V, H=5 V)
Oscilloscope
TX0
TX1
Changes depending on range setting
1) TX0 and TX1 have
opposite phase each
other.
2) Frequency is equal to the
TX frequency.
Oscilloscope
Changes depending on range setting
5V
Same timing as TX0 and
TX1
Multimeter Changes according to gain
setting
Setting
Setting
Setting
Oscilloscope
Changes depending on data
Rating/Remarks
 
H
 
L
5V
 
0 : about 1.9 V
 
5 : about 3.1 V
 
10 : about 3.8 V
5V
about 1 sec