Service manual

3 • Theory Of Operation
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
3-31
NOTES:
1. The system is designed to handle different types of PSDs.
2. The DM300c and DM400c/DM450c use the same main logic board but
each PCN (G900, G903, G905) will have a unique part number for their
replacement main logic boards installed by service. The reason is that
the main board must have the correct PCN-specifi c application code on
it prior to installation.
3. The DM300c, DM400c/DM450c, and DM475 use different power supplies.
Cover Sensor
Jam Lever
Sensor
Purge PCB
CR Sensor
Pump Sensor
Cap Sensor
Carriage PCB
Print Head
Tank NVM
Main Logic (Controller) PCB
PS1 Detect
PS2 Skew
PS3 Skew/Debit
Power
Supply PCB
Feeder PCB
(DM400c Only)
Feeder Sensor 1
(Hopper)
Feeder Sensor 2
Feeder Motor
Feeder
Encoder
Transport/
LF
Encoder
Keyboard/
Display PCB
Tape Motor
Transport/LF
Motor
CR Motor
Purge Motor
USB-H1 USB FunctionUSB-H2 RJ11 PB232 Scale
MODEM PCB
PSD1
(iButton)
LED 1
LED 2
PSD2*
Figure 3-32 A Block Diagram (DM300c/DM400c/DM450c)
3.6 Electronics