Ricoh D391, Service Manual

Page: 446 / 490

Name Function
Power Supply Unit 1
Supplies DC power to the master control board, inserter control
board: DC 5V, 24V
Power Supply Unit 2 Supplies DC power to the slave control board, cutter control board
Power Switch Turns power supply units 1, 2 on/off
Microswitch Turns the DC 24V, 36V circuits on/off
Breaker Switch
Trips the breaker and cuts power supply to the bookbinder if a power
overload occurs
Electrical Circuit Protection Features
The DC 24V and DC 36V electrical circuits of all the motors and solenoids connected to the main control
board, slave control board, and cutter control board are provided with fuses or other devices to protect
these circuits from power overload.
The motor drive boards (small PCBs near the motors) are also equipped with protective devices.
The boards themselves are also protected with fuses at their 24VDC/36VDC power supply points.
If a short or other problem occurs in power supply units 1 or 2 (due to current or power overload), the
affected power unit will shut down immediately in order to protect the board circuits. Fuses on boards blow
and cut the AC power supply to the bookbinder as soon as such a problem occurs. When a current or
voltage overload occurs, the machine must be turned off immediately and turned on again only after the
problem has been corrected.
Energy Save Mode
The bookbinder features energy save modes to conserve energy when the binder remains on but idle. The
bookbinder enters the energy save mode when one of the following occurs:
1. When the Energy Save button on the bookbinder (right front corner) is pressed to set the machine in
energy save mode manually
2. After the machine remains idle for the specified time
3. When the host machine is turned off
When the bookbinder in the energy save mode, full operation can be restored by one of the following
events:
• Pressing the energy save button
• Starting a book binding job on the host machine
6. Details
444
6