Dell 1600n - Multifunction Laser Printer B/W Service Manual page 164

Circuit Diagram
11.6 Telephone Section
1) Speed Dial:
2) On-hook Dial (manual fax):
3) Last Number Redial:
4) Automatic Redial:
5) Pause:
6) Ringer Volume:
7) Tone/Pulse:
11.7 SMPS & HVPS Section
The SMPS supplies DC Power to the System.
It takes 110V/220V and outputs the +5V, +24V to supply the power to the main board and ADF board. The HVPS
board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making best
condition to display the image. 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.
11.7.1 HVPS (High Voltage Power Supply)
• Transfer High Voltage (THV+)
> Input Voltage : 24 V DC & 15%
> Output Voltage : MAX +5.0KV & 5 %,(Duty Variable, no loading )
- 1.2KV & 15% (when cleaning,200 ( )
> Output Voltage Trigger : 6.5 )
> Input contrast of the Voltage stability degree :under & 5 % (fluctuating input 21.6V % 26.4V)
Loading contrast : & 5 % or less
> Output Voltage Rising Time : 100 ms Max
> Output Voltage Falling Time : 100 ms Max
> Fluctuating transfer voltage with environmental various : +650 V(Duty 10%) ~ 5 KV (Duty 90%)
> Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the
resistance by recognizing the voltage value, F/B, while permits the environmental recognition voltage.
> Output Voltage Control Method : Transfer Output Voltage is outputted and controlled by changing Duty of
THVPWM Signal. 10% Duty : +650V, 90% Duty : +5KV & 5%
Service Manual
11-16
200 Locations (46 digits maximum per location)
Yes
Yes
Yes
Yes (using Redial key)
Off, Low, Medium, High
Selectable (Tech Mode Only no Telecom certification for Pulse mode)