Samsung SCX-4500 Service Manual page 31

Product specification and feature
- Rated Output Power
NO Items
1 CHANNEL
2 CONNECTOR PIN
3 Rated Output
4 Max. Output current
5 Peak Loading current
6 RIPPLE NOISE Voltage
7 Maximum output
8 Peak output
9 Protection for loading
shortage and overflowing
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
- Out Voltage : Max +5.0KV
- Output Voltage Variation :
- 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
- Out Voltage : -1.2KV ~ -1.8KV DC
- Out Voltage Rising Time : 50 ms Max
- Out Voltage Falling Time : 50 ms Max
Service Manual
2-22
CH1
+5V
CON 2
5V PIN: 2
GND PIN: 3, 4
+5V 5% (4.75 5.25V)
1.0 A
1.2 A
150mVp-p or less
5W
6.0W
Fuse Protection
10%
3
3 % below(Variation 21.6V 26.4V)
10%
3%
CH2
+24.0V
CON 2
24V PIN: 7, 8
GND PIN: 5, 6
+24V 10% (21.6 26.4V)
2.0 A
2.5 A
500mVp-p or less
48W
60W
Shutdown when output
current flows 2.8A~6.0A
Samsung Electronics
Remarks
1ms
1ms