Furuno FAR-2107 Series Service Manual page 329

Type Setting of J108
03P9339C, D
(220 VAC)
03P9339A, B
1-2, 4-7, 5-8
(100 VAC)
Note:
When the setting of "J108" is just changed without adjustments as menteioned above,
the operating voltage of the overvoltage protection circuit does not meet the specified
value.
- 220 VAC -> 100 VAC: approximately 130 VAC.
- 100 VAC -> 220 VAC: approximately 325 VAC.
Operation without re-adjustments may result in a failure of the equipment.
2. Circuit setting
The setting of J108 is the setting of the rectifier circuit and the voltage setting of the input
overvoltage protection circuit as shown below.
AC IN
100VAC: Short
220VAC: Open
4.12.2 Changing DC Power Input
P.C.Boards 03P9338A and 03P9338B are 12-24 V type. P.C.Boards (03P9338C and
03P9338D) are 24 V type. The setting of JP1 sets the input power type. This is the setting of
the operating voltage of the input power low volatage protection circuit. It is approximately
15 V in the 24 V type and approximately 8 V in the 12 to 24 V type.
Table 4.12.1 Adjstment of over voltage protection circuit
Setting of input power
Open 288 VAC
For
144 VAC
Jumper
CR26
J108
CR8
7/8 4/5
100VAC: Short
220VAC: Open
R19
J108 INPUT Voltage
Error DET
1 2
PR5V H
V
IN
4
R18
Q12
Q11
Fig. 4.12.3 AC PWR Board
Adjustment method
Overvoltage
voltage
Point at which CR23
is turned on by
adjusting R21
Doubler Rectifier
L31
+
C31
L32
C26
R41
- C32
C27 R42
CR23
U22
PW CONT
4-65
4.12 Change of Power Input Type
protection Factory setting
adjustment
282 to 294 VAC
141 to 147 VAC
= 280VAC
- 310VAC