Service manual

3 • Theory Of Operation
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
3-49
Sensors
Qty Sensor Name Type Function
1 FS1 Deck Digital with Mechanical
Flag
Detects an empty feeder deck
1 FS2/WS1 Feeder_Exit Mail piece gap creation. Stage mail
ahead of WOW module. Used as 1 of 3
sensors to measure mail length
1 WS2 WOW_middle Used to measure envelope length of
material less than 9.88 inches.
1 WS3 WOW_Exit Used to measure envelope length great-
er than 9.88 inches. Also used to detect
envelope exit from weighing transport.
1 S1 Printer Module_
Entrance
Digital Through-Beam Detects mail entering the printer mod-
ule.
1 S2 Skew Digital Through-Beam Used to detect skew in the DM300c.
Skew sensing is turned off in the DM400
through DM475. Even though there is
no S2 on the DM475, it is still displayed
in Diagnostics as “Clear”.
1 S3 Trip Digital Through-Beam Used to Debit funds and generate indica
prior to printing.
1 S4 Feeder Top Cover Digital with Mechanical
Flag
Monitors Feeder top cover position
1 S5 Transport Digital with Mechanical
Flag
Monitors Printer transport position
1 S6 Printer Top Cover Digital with Mechanical
Flag
Monitors Printer top cover position
1 WS4 Width Sensor 1 Analog Service adjustable sensor for first width
breakpoint (physical adjustment)
1 WS5 Width Sensor 2 Analog Service adjustable sensor for second
width breakpoint (physical adjustment)
WS6 Width Sensor 3 Analog For future use. Service adjustable
sensor for third width breakpoint. Not
populated . (physical adjustment)
1 T1 Thickness Sensor Digital - Encoder Measures Mail thickness
1 WOW load cell Analog - Load Cell Weight measurement, input to WOW
3.10 DM475 Feeder/WOW Theory