Xerox DocuPrint N2025 Service Manual page 366

20. Print Engine Controller PWB <--> Feeder 2 PWB (<--> Feeder 3 PWB) <--> Low Paper
Sensor, No Paper Sensor, Tray 1 Feed Solenoid, Switch Size, and Feed Motor 2 (or 3)
Table 4 Signal names for the Feeder 2 PWB (or 3) <--> Switch Size path
Signal Name Description
SW1 Signal from the Switch Size. Goes Low when SIZE 1BIT of the Switch Size is
actuated.
SW2 Signal from the Switch Size. Goes Low when SIZE 2BIT of the Switch Size is
actuated.
SW3 Signal from the Switch Size. Goes Low when SIZE 3BIT of the Switch Size is
actuated.
SW4 Signal from the Switch Size. Goes Low when SIZE 4BIT of the Switch Size is
actuated.
Table 5 Signal names for the Feeder 2 PWB (or 3) <--> Feed Motor 2 (or 3) path
Signal Name Description
/B Feed Motor 2 (or 3) activating signal
/A Feed Motor 2 (or 3) activating signal
B Feed Motor 2 (or 3) activating signal
A Feed Motor 2 (or 3) activating signal
20. Print Engine Controller PWB <--> Feeder 2 PWB (<--> Feeder 3 PWB) <--> Low Paper
Sensor, No Paper Sensor, Tray 1 Feed Solenoid, Switch Size, and Feed Motor 2 (or 3)
• Detection of the Feeder configuration through the FEEDER CK signal
When no 500 Sheet Feeder is attached, 3.3 VDC is divided by the resistances R10K and
R4.7K on the Print Engine Controller PWB, and the voltage across the resistance R4.7K
appears on the FEEDER CK signal. When one or two 500 Sheet Feeders are added, the
resistance RF on the PWB Feeder of the added Feeder(s) is connected in parallel with the
resistance R10K of the Print Engine Controller PWB, and the voltage across the resis-
tance R10K changes according to the number of 500 Sheet Feeders added. Therefore,
the Feeder configuration can be detected from the voltage of the FEEDER CK signal.
Wiring Data
500 Sheet Feeder
Feeder Configuration Feeder 2
One 500 Sheet Feeder O
added
Two 500 Sheet Feeders O
added
02/2000
7-36
Figure 4
Table 6 Configuration
Feeder 3
-
O
DocuPrint N2025/N2825
Initial Issue