System Overview
Samsung Electronics
Service Manual
3-3
1) OPC Unit
Images are created on the OPC unit using an electro-photographic process. The unit consists of:-
* OPC Drum
used to collect waste toner remaining on the OPC drum,
* Charge Roller Assy
2) PTB Unit (Paper Transfer Belf)
PTB stands for Image Transfer Belt. An image developed on the OPC Drum is transferred first to
the PTB. This is called the T1 Transfer Paper Charge Roller.
Images are built up in layers on the PTB.
First the Yellow (Y) colour image is created on the OPC and transferred to the PTB
Next the Magenta (M) colour image is created on the OPC and transferred to the PTB
Followed by the Cyan (C) and Black (K) images.
3) Transfer Roller
Once the complete, full colour, image, has been built up on the ITB the Transfer Roller is used to
transfer the image onto paper. This is called the T2 Transfer (Secondary Image Transfer)
4) FCT (First Cassette Tray)
It stores and automatically feeds print paper.
Pick-up Roller picks up paper, controls drive, feeds paper, removes static electricity, and so on.
> Spec.
* Paper arrange way : Side Registration
* Paper Direction : FISO (Front-in, Side-Out)
* Cassette Type : A4, Ltr
* Paper Discharge : Separation Claw
* Capacity : 250 Sheets (Standard paper 75mg/m? 20lb)
* Paper Size : A4, Letter
* Paper Weight (average) : 60~90g/m
2
(16~24lbs)
* Paper Type : General Printing Paper
* Additional Function : Paper Empty Sensor
5) SCF (Second Cassette Feeder)
This additionally stores and automatically feeds printing paper. Its function is the same as the FCT
(First Cassette Tray)
> Spec.
* Paper arrangement : Side Registration
* Paper Direction : FISO (Front-in, Side-Out)
* Cassette Type : A4, Ltr
* Paper Discharge : Separation Claw
* Capacity : 500 Sheets (Standard paper 75mg/m
2
20lb)
* Paper Size : A4, Letter
* Paper Weight (average) : 60~90g/m
2
(16~24lbs)
* Paper Type : General Printing Paper
* Additional Function : Paper Empty Sensor
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