Electrical Components - Toshiba DP120F Service Manual

Chapter 6 PBA Outline and Sensor Functions

1. Electrical Components

The electrical components of this machine consists of the scanning section, recording section,
operating section (OPERATION PANEL PBA), controlling section (MAIN PBA, NCU PBA,
MOTHER PBA, PC I/F PBA, DOCUMENT SENSOR PBA, TEL PBA, MEMORY PBA, OP-
TIONAL TRAY PBA) and power supply section (LVPS, HVPS). Each section has the following
functions.
Scanning section:
Recording section:
Operating section:
Controlling section:
Power supply section:
March 2000 © TOSHIBA TEC
Reads documents by the CIS.
Records on paper by the LSU, developer assembly, drum unit,
and fuser.
LSU (Records a picture data latent image on the drum)
Developer assembly and drum unit (Develop a picture data
latent image by toner and transfer it to paper)
Fuser (Fixes toner on paper by heating)
OPERATION PANEL PBA (Key input sensing, LED indication
control, LCD control)
MAIN PBA (Control of the entire system)
NCU PBA (Telephone line control)
MOTHER PBA (Signal relay between the MAIN PBA and each
PBA or I/O)
PC I/F PBA (Circuit for parallel data communication with the
PC)
DOCUMENT SENSOR PBA (Detection of document)
TEL PBA (Signal relay with the handset)
MEMORY PBA (Optional expansion image memory circuit)
OPTIONAL TRAY PBA (Drive control of the optional recording
paper tray)
LVPS (Generation of supply voltages for the logic system and
drive system and power supply delivery to the fuser)
HVPS PBA (HVPS delivery for charging, development, and
transfer)
6-1 DP120F/DP125F PBA Outline and Sensor Function