
RMAN-RWS-001 rev. B • RW Series Repair Procedures • 2-22 •
Replacement Kit RK17393-003; RK18471-01
RW 420 Media Guide Assembly
Installation Instructions
This kit includes the parts and documentation necessary to install the RK17393-
003 or RK18471-01 Media Guide Kit in the RW 420 model printer. Read these
instructions thoroughly before attempting to install this kit.
The operator must wear a properly grounded ESD strap to perform the following
repair procedure.
Reference Materials
UMAN-RWS RW series Users’ Guide
Tools Required
#0 or #1 Phillips Head Screw Driver
Cautions
Caution•Thisinstallationmustbeperformedonlybyaqualiedservicetechnician.
Unless otherwise specied:
• Always turn the printer off
• Remove the battery before installing any Replacement Kits.
• Remove media before installing this Replacement Kit.
Removing the Media Assembly
1. Turn the printer off and remove the battery pack.
2. Remove the Upper Housing, referring to procedure for RK18280-1. Pivot the
Upper Housing away from the Printer. You may elect to disconnect the LCD
and Keypad ex circuits form the CPU Board for ease of handling the Printer.
3. Unplug the following cables from the CPU Board: J2 (Bar Sensor), J10 (Gap
Sensor). Unplug the Printhead Cable (J5) from the CPU board. You may also
elect to unplug the Motor Cable from J6.
4 Remove the two screws securing the CPU Board to the Lower Housing.
5. Remove the (4) Screws holding the Printer Frame and Media Cover to the
Lower Housing. Retain the Screws
6 Tilt the Printer Frame towards the back of the unit. While it is not necessary,
you may elect to remove the Printer Frame and Media Cover assembly from the
Lower Housing.
7. Remove and retain the (2) Screws securing the Media Assembly to the Printer.
8. Remove the Media Assembly:
Use care when working around the Printhead. The edges of the tear bar are very
sharp!
Rock the Media Assembly towards the back of the printer and then lift it up
and away from the Printer Frame. RK17393-003 only: Ensure the two Gears
assembled to the Media Assembly are removed as well.
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