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2-51 4059 Service Manual
4059-XXX
Fuser Envelope Conditioner Solenoid Service Check
The fuser solenoid is in models 3455, 2455, 2450, 2420, 1855,
1650, 1625 and 1620 and the World Trade printer model 2450.
Service Tip: Try changing the envelope enhance level setting. A
different setting may correct the problem.
Note: The level I fuser board uses +42 V dc which is derived from
the LVPS via the interconnect board (J1) and the envelope
conditioner cable. The solenoid is controlled by logic located on the
engine board. The level II fuser board does not use the +42 V dc and
receives control for the solenoid from logic located on the engine
board. A level II engine board can be used with a level I fuser board
provided that the jumpers at JP-1 and JP-2 are correctly positioned
as described in configuration 2. If the jumpers are not correctly
positioned on the engine board, damage can result to the fuser
board.
Engine Board Jumper Configurations
Refer to the “Fuser Board” on page 5-11, “Level 1 Engine Board” on
page 5-9 and “Level 2 Engine Board” on page 5-10 to identify the
level boards installed in your printer.
1. A level I fuser board and a level I engine board require a
envelope conditioner cable and no jumpers on the engine
board.
2. A level I fuser board and level II engine board require jumpers at
locations JP1-2 to JP1-3 and JP2-2 to JP2-3 on the engine
board.
3. A level II fuser board and level II engine board require jumpers
at locations JP1-1 to JP1-2 and JP2-1 to JP2-2 on the engine
board.