• 2-15 • P1057798-001 rev. B • QLn420 Repair Procedures
The operator must wear a properly grounded ESD strap to perform the following repair
procedure.
Tools Required
• Torque Driver (4.7 +/- 1 in. lb.) #0 or #1 Phillips bit
Cautions
Caution • This installation must be performed only by a qualied service technician.
Unless otherwise specified:
• Always turn the printer off
• Remove the battery before installing any Replacement Kits.
• Remove media before installing this Replacement Kit
ASSEMBLY/DISASSEMBLY OF QLn420
Disassembling the QLn420 Printer
1. Turn the printer off and remove
the battery pack.
2. Press the latch release button and
open the Media Cover. Remove
any media from the printer.
3. To separate the Main Housing
from the Lower Housing, use a
torque driver to remove four (4)
Phillips screws on the bottom of
the printer (where shown).
4. Lift up on the front of the Lower
Housing to separate it from the
Upper Housing.
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