Ricoh Gestetner 5450, Service Manual

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ELECTRICAL COMPONENT LAYOUT 1 July, 1998
1-18
1.6.8 TABLES OF ELECTRICAL COMPONENTS
Boards
Index No. Name Function
1 Operation Panel Board Controls the operation panel.
2 Lamp Stabilizer Provides dc power for the xenon lamp.
3 Job Separator Board Controls the job separator.
4 Main Motor Control
Board Controls the main motor.
5 Power Supply Unit
(PSU) Provides dc power to the system.
6 Main Processing Unit
(MPU) Controls all machine functions both directly and
through other boards.
7 I/O Board Controls the mechanical components.
8 Memory Board Enables the image editing function and data
printout via SP mode. This is an option.
9 Interface Board Enables the connection with the PC controller.
This is an option for the China and Ricoh Asia
versions.
10 Thermal Head Power
Supply Board Provides dc power to the thermal head.
11 Sensor Board Unit
(SBU) Contains the CCD, and outputs a video signal to
the MPU.
19 Feed Pressure
Detection Board Sends data about the paper feed pressure to the
CPU.
26 Paper Width Detection
Board Sends data about the paper width on the paper
table to the CPU.
51 Separation Pressure
Detection Board Sends data about the paper separation pressure
to the CPU.
97 Ink Detection Board Checks if there is ink in the drum.
Solenoids
Index No. Name Function
54 Printing Pressure
Release Solenoid There are two solenoids: one at the front and
one at the rear. They pull the release arms to
apply the printing pressure against the drum.
86 Duct Entrance Solenoid Opens or closes the plate at the entrance of the
master buffer duct.
Switches
Index No. Name Function
33 Paper Table Lowering
Switch Lowers the paper table.
35 Main Switch Turns the power on or off.
56 Cover Safety Switches Checks if the front door is set correctly.