Samsung SCX-4500 Series, Service Manual, Page: 31 / 141

Service Manual
Product specification and feature
2-22
Samsung Electronics
- Rated Output Power
NO Items CH1 CH2 Remarks
1 CHANNEL +5V +24.0V
2 CONNECTOR PIN CON 2 CON 2
5V PIN: 2 24V PIN: 7, 8
GND PIN: 3, 4 GND PIN: 5, 6
3 Rated Output +5V 5% (4.75 5.25V)+24V 10% (21.6 26.4V)
4 Max. Output current 1.0 A 2.0 A
5 Peak Loading current 1.2 A 2.5 A 1ms
6 RIPPLE NOISE Voltage 150mVp-p or less 500mVp-p or less
7 Maximum output 5W 48W
8 Peak output 6.0W 60W 1ms
9 Protection for loading Fuse Protection Shutdown when output
shortage and overflowing current flows 2.8A~6.0A
current
3) HVPS Board
The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS, and the outputted high voltage is
supplied to the toner, OPC cartridge, and transfer roller.
Transfer High Voltage (THV+)
- Input Voltage : 24 V DC 10%
- Out Voltage : Max +5.0KV 3
- Output Voltage Variation : 3 % below(Variation 21.6V 26.4V)
- Out Voltage Rising Time : 100 ms Max
- Out Voltage Falling Time : 100 ms Max
- Transfer Variation Voltage on Environment Variation : +400V ~ 5 KV
- Control Method on environment : THV-PWM ACTIVE, transfer Active signal, of environment sensing
voltage is input and get feed back current, and recalculate it to resistance.
- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal.
Charge Voltage (MHV)
- Input Voltage : 24 V DC 10%
- Out Voltage : -1.2KV ~ -1.8KV DC 3%
- Out Voltage Rising Time : 50 ms Max
- Out Voltage Falling Time : 50 ms Max