Lower Cover - Fujitsu DL7600 Maintenance Manual

(3) Lower cover

AC inlet
Reactor
(only 200v)
AC inlet
a. Lower cover
The Lower cover supports the printer mechanism and electric units as follows.
b. ROM board (control board with flash ROM)
The ROM board controls the host interface, control panel, and printing mechanism using an MPU and an
LSI circuit. Memory holds the resident character patterns and firmware, including resident emulation programs.
This board also has drivers and receivers for other components. The sensor receivers convert signals from the
sensors. The drivers supply power to motors, print head wires, and other components. LAN relay board is
connected to this board through the cable.
c. Power supply unit
The power supply unit supplies DC40V and DC5V by two transformers.
Two transformers realize that printer displays fatal alarms though printer shuts down DC40V.
(Even if DC40V is shut down, DC5V still remains. )
d. AC inlet and AC switch.
The AC inlet has protective earth cable. In order to prevent an electric shock, it must be fixed to frame ground.
The AC switch has cables to connect the Power supply unit and AC inlet.
e. CSF connector (front CSF)
The connector board for the front CSF is mounted at the front right of the lower over.
Power supply unit
Lower cover
Figure 1.7 Electric components of DL7600
ROM board
17
CSF connector