Samsung CLX-8540ND - Page 45

Product Overview
Service Manual
2-34
Samsung Electronics
2.3.2.7 Fuser Drive Board
The FDB (Fuser Drive Board) controls 2 halogen lamps in the fuser unit using control signals which are
provided from the ENGINE PBA and supplies AC power to the SMPS. Both V1/V2 FDBs provide max.
1500W output power.
When the phase signal of AC Power goes to zero, the FDB sends a zero-crossing detect signal to the
ENGINE PBA. The zero-crossing output consists an open-collector node.
• Connection
1 INLET AC
2 FUSER CONTROL (from Main board)
3 FUSER AC (to Fuser lamp)
4 SMPS AC ( to SMPS)
• Specication
V1 V2
Input Voltage
(Range)
AC 110V
(90 ~ 135V)
AC 220V
(180 ~ 270V)
Input Current 20A 10A
Output Power Max. 1500W Max. 1500W
Phase Detect Zero-Crossing Detect
(Open Collector Output)
Protection Relay Control Signal
2
1
4
3
FUSEVARISTOR PHOTO TRAIC
HEAT SINK
2
1
4
3