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3.6 Electronics
USB-H1
Keyboard/
Display PCB
Power
Supply PCB
Feeder PCB
(DM400c Only)
Feeder Sensor 1
(Hopper)
Feeder Sensor 2
Feeder
Encoder
Feeder Motor
Figure 3-32 A Block Diagram (DM300c/DM400c/DM450c)
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
USB-H2
Transport/
LF
Encoder
Main Logic (Controller) PCB
Carriage PCB
Print Head
Tank NVM
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.
3 • Theory Of Operation
USB Function
MODEM PCB
Tape Motor
Transport/LF
Motor
CR Motor
Purge Motor
PS1 Detect
PS2 Skew
PS3 Skew/Debit
RJ11
PB232 Scale
PSD1
(iButton)
PSD2*
LED 1
LED 2
Cover Sensor
Jam Lever
Sensor
Purge PCB
CR Sensor
Pump Sensor
Cap Sensor
3-31

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This manual also for:

Dm400c, Dm475, Dm450c

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