Chapter 2. Maintenance; Adjustment; Replacement Of Lithium Battery - Furuno FE-700 Service Manual

2.1 ADJUSTMENT

ANLG board
Vcc (+5V)
Switching frequency

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.
Figure 2.2 Memory Backup Circuit on the MEM board

Chapter 2. Maintenance

Measuring Point
J5, #3 and GND ( TP1 )
U3,#9 and U3, #7 ( GND )
R47
R49
U3
R50
J1
Figure 2.1 Adjuster on the ANLG board
Type of Battery
CR2450-F2ST2
U2
2
VBAT1
1 2
Ratings
+5±0.02 V
83.4~83.8 kHz
J4
TP1
J3 J2
.
Code No
000-133-495
Take care to avoid external
short-circuiting of the battery.
JP1
A
discharge could create a burn
BT1
or fire hazard!
12
Adjuster
R49, ANLG Board
R50, ANLG Board
WARNING!
sustained high-rate of