Furuno FE-700 - Chapter 2. Maintenance; Adjustment; Replacement of Lithium Battery

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2.1 ADJUSTMENT
ANLG board
Measuring Point Ratings Adjuster
Vcc (+5V)
J5, #3 and GND ( TP1 )
+5±0.02 V R49, ANLG Board
Switching frequency
U3,#9 and U3, #7 ( GND )
83.4~83.8 kHz R50, ANLG Board
Figure 2.1 Adjuster on the ANLG board
2.2 REPLACEMENT OF LITHIUM BATTERY
The battery on the MEM board must be replaced when the low battery alarm appears on the
display.
Note: Before removing the battery, disconnect JP1.
Type of Battery Code No
.
CR2450-F2ST2 000-133-495
Figure 2.2 Memory Backup Circuit on the MEM board
R50
TP1
R47
J1
J4
J3 J2
U3
U2
VBAT1
2
1
2
JP1
BT1
Cha
p
ter 2. Maintenance
R49
WARNING!
Take care to avoid external
short-circuiting of the battery.
A sustained high-rate of
discharge could create a burn
or fire hazard!