Chapter 7 Parts Replacement
7-9
AC-4000 Service Manual No. 0181B
I
Detaching the thermal head
1.
Pull out the thermal (harness) connector.
2.
Loosen the two screws (A), and put them into the state where they can come off.
3.
Remove the screw (B). (It becomes easy to remove the thermal head.)
4.
Put the thermal head into the state of opening quietly. (Care must be paid so as to drop neither the
screw nor spring. )
Screw driver
Loosen
Harness
Screw (M3 x 6)
Screw (M3 x 6)
(A)
(B)
Thermal head
Model
LH3124I (Double-density thermal head) made by TDK
Total dot number
448 dots
Dot pitch
0.135mm
Head resistance
R=528 to 672 (automatic setting)
Power consumption
0.66W/dot
Applied voltage
24V
Adjusting thermal head print conditions
•
Loosen the two screws (M3 x 6) slightly, and move the thermal head back and forth.
•
Adjust to match the top point of the print roller with the thermal head applied point.
Thermal head specifications
Adjustment screw
(M3 x 6)
Moves back and forth.
Thermal head
Print roller