Electrical Components And Controller; Switch (Printer Front Door Interlock); Main Cooling Fan; Print Cartridge Cooling Fan - Lexmark T650 Service Manual

4062-XXX

Electrical components and controller

Main cooling fan

System card
assembly

Switch (printer front door interlock)

The switch is a safety switch to cut off a 24 VDC power supply from the LVPS card assembly to the high volt
power supply (HVPS) card assembly, printer system card assembly and to the main drive motor assembly,
while the printer front door assembly is open.
Main cooling fan
The main cooling fan discharges air from the printer to prevent excessive temperature increase.

Print cartridge cooling fan

The print cartridge cooling fan discharges air from the print cartridge area to prevent excessive temperature
increase.

Duplex cooling fan

The Duplex cooling fan discharges air from the duplex drive motor area to prevent excessive temperature
increase.

LVPS card assembly

The LVPS card assembly generates low voltages 5V for logic circuits, 5 V for laser diodes and 24V for cooling
fans. The LVPS is switchable and can be switched to work with 100V, 110 and 220V machines.

HVPS card assembly

The HVPS card assembly generates AC power and feeds it to the developer roll, the transfer roll assembly and
the charge roll assembly.
3-76
Service Manual
LVPS card
assembly
Duplex
cooling fan
Print cartridge
cooling fan
HVPS card
assembly