SERVICE CALL CONDITIONS
SM 4-111 B234/B235/B236/D101/D102/D103
Trouble-
shooting
AC Input Module
The AC input module has the following 5 fuses.
Input Fuse Rating
FU1 3.15A/250V
FU3 4A/250V
FU001 3.15A/250V
FU002 6.3A/250V
FU101 6.3A/250V
The AC input area of the PSU has fuses to cut AC power to the board in case of
damage to the PSU board or one or more short circuits in the output area.
The location of the board where output is interrupted is different, depending on
which fuse blows. Table 2 shows which areas of the PSU are affected by each fuse.
As shown in Table 2, FU1 cuts all circuits if damage or short circuits occur at PSU-
C, which operates independently of the other circuits while the machine is in the
sleep (energy conservation) mode. A short circuit in an input harness or other
problem on PSU-C will also cause FU3 to blow and will cut all power output from
the PSU.
Table 2: PSU Fuses and Related Power Output Interrupts
Converter Output Name FU1 FU3 FU001 FU002 FU101
VccE O O Energy Save
VcaE O O
VccL O O O 1st
Vcc O O O
Vaa1 O O O O
Vaa2 O O O O
2nd
Vaa3 O O O O
Vaa4 O O O O O 3rd
Vaa5 O O O O O
Vmm1 O O O O O 4th
Vmm2 O O O O O
If there is damage or a short circuit inside the 1st converter of the control system in
PSU-E, FU001 blows and power is interrupted in the output of the 1st, 2nd, 3rd,
and 4th converters.
If there is damage or a short circuit inside the 2nd converter of the control system
in PSU-E, FU002 blows and power is interrupted in the output of the 2nd, 3rd, and
4th converters.
If there is damage or a short circuit inside the 3rd or 4th converter of the control
system in PSU-E, FU101 blows and power is interrupted in the output of the 3rd
and 4th converters.
To Next Page
Loading...
