Service manual

General Description
Printhead Protection During Heavy Duty Printing
The printhead is protected from overheating and voltage drops to the printhead
driver. If the printhead temperature exceeds the upper limit, printing stops
automatically until the printhead temperature drops to the required value.
If heavy duty printing causes the printhead driver voltage to drop below the lower
limit, printing stops. When the power supply voltage increases to the required
level, the printer prints the rest of the line.
This protection occurs when half or
more of the wires are activated simultaneously and continuously.
Main Components
The main components are designed so that you can easily remove and replace
them when you maintain or repair the printer. The main components are:
0
C064 MAIN PCB main control board
0
Control Panel PCB control panel board
l
PEBFIL-II PCB filter circuit board
0
Transformer
l
Model 5C10 printer mechanism.
Figure 1-11. LQ-200/AP3000 Component Layout
LQ-200/AP3000
1-29