Samsung CLP-510/XBH, Service Manual

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Samsung Electronics
Summary of product
Service Manual
1) Charging Voltage: Charger
* Function : This high voltage is used to charge the surface of the OPC to about -500volt~800volt.
* Output voltage : -200V~-2.0KV DC +/- 3% (Duty is changeable, no loading)
* Error type :If MHV was not present, the surface of the OPC is not charged. As a result, toner on
the developer roller is transferred over to the OPC drum: therefore, black paper could
be printed out.
2) Transfer high voltage: T1(+)
* Function : This high voltage is used to transfer toner from the OPC drum to the ITB unit.
* Output voltage : +400V~ +3.5KV DC +/- 3% (Duty is changeable, no loading)
* Error type : If T1 was not present, it is not possible to transfer toner from the OPC drum to the
ITB. As a result, printer output could be faint.
3) Transfer High Voltage: T2 (+)
* Function : this high voltage is use to transfer toner from the ITB to the paper.
* Output voltage : +400V~ +5KV DC +/- 3% (Duty is changeable, no loading)
* Error type : If T2 was not present, it is not possible to transfer toner from the ITB to the paper. As
a result, printing output could be faint
4) Cleaning voltage: T2 (-)
* This high voltage is used to transfer (-)toner, remains on transfer roller, from the Transfer Roller
to the ITB unit.
* Output voltage : There is no feedback control, and it outputs a fixed voltage (-900V).
* Error type : Toner contamination occurs on the reverse side of the printed-paper.
5) Supplying voltage: Supply
* Function : Supply the duplicated (AC+DC) voltage from the HVPS to the Deve Drive Board.
* Output voltage
AC Voltage f : 1 KHz ~ 3KHz (Duty is changeable)
AC Voltage Vp-p : 1KV ~ 3KV
DC : -100V ~ -1000V
* Error type: 1. If this voltage is GND, print density is extremely low.
2. If this voltage is floating due to unstable contact point at the HV terminal, density
becomes so low as that printing results are not visible to the naked eye.