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July 1998 TC9830SM Rev. B 7/98 Confidential 27
CHAPTER 6 SERVICE PROCEDURES
MAINTENANCE OVERVIEW
This chapter describes removal and replacement
procedures for the following assemblies:
Operator Control Panel
Cover Housing
Power Transformer Assembly
Power Transformer
Bridge Rectifier
AC Inlet
Control Board Assembly
Print Assembly
Bi-Cell Emitter
Upper Supply Guide
Printhead Module
Ribbon Spool Assemblies
Ribbon Roller Assemblies
DC Ribbon Motors
Feed Assembly
Platen Module
Bi-Cell Sensor
Lower Guide Assembly
Supply Holder Assembly
Supply Holder
Supply Holder Guides
Platen Motor
Peel Module
GENERAL SAFETY TIPS
Note these general safety reminders before servicing
the printer. Additional cautions and warnings appear
in this document as they apply to specific procedures.
WARNING
NEVER perform maintenance on the printer with the
power cord connected. Doing so exposes points where
AC voltages are present. Reattach the power cord
only when test procedures indicate that power is
required.
CAUTION
Static electricity can damage printer parts. Use a
static ground wrist strap whenever possible. If a wrist
strap is not available, ground yourself by touching
some metal before touching the printer.
CONTROL PANEL REMOVAL
TOOLS REQUIRED:
• Phillips Screwdriver
• Flat-head Screwdriver
1. Turn the printer off and unplug the power cord.
2. Place printer on a flat, uncluttered surface.
3. Remove Control Panel by applying light
downward pressure on the latching tab on the top
of panel fascia.
4. Remove ribbon harness assembly by grasping
the connector, applying slight force away from
the control panel circuit board.
5. Remove single line ground wire.
6. Set Control Panel aside and place the ribbon
harness and ground wire back into the printer, to
prevent snagging on Cover Housing.
7. Reassemble in reverse order.
COVER HOUSING REMOVAL
The cover housing is attached to the printer frame by
five Phillips head screws. Two screws are located near
the printer base, one is behind the Control Panel, and
two are on the supply spool frame wall.
TOOLS REQUIRED:
• Phillips screwdriver
• Flat-head Screwdriver
1. Remove two screws at printer base.
2. Remove two screws on frame wall.
3. Remove screw from under control panel.
4. Lift cover housing to clear the frame walls.
5. Reassemble in reverse order.