Service manual

3-44
CD-S500 Series
3-15 Adjusting the Head Gap
When the following parts have been removed or when the fixing screws of these parts are loosened,
be sure to adjust the head gap.
• Mechanism unit
• Platen
Head Gap Adjusting Procedure
1) Remove case U.
2) Close the platen chassis.
3) Use thickness gauges and measure the clearance between the head and the platen at the
marking areas (3 positions) on the platen.
Appropriate head gap D = 0.55 mm
4) If the head gap is not appropriate, loosen the platen fixing screws (2 pcs.), adjust the platen
position to the appropriate clearance and secure the platen in this position.
* When assembling the parts, follow the procedure in reverse.
Refer to “3-6 Disassembly and Assembly of Case U, Front Cover and Operation Panel PCB”
and “♦ Removing the Lever Cover, Case U and Knob N” (Page 3-7).
CAUTION
• If the gap between the head and the platen is not appropriate, printing cannot be
performed in appropriate density.
Platen
SA print head
Platen
D = 0.55 mm
D
Markings
Platen fixing screw
Miniature pan head screw M3 × 6 W
* The above figure shows a standard model.