Monarch 9830TM Print Contrast Adjustment, Platen Motor Gear Adjustment, Ribbon Tension Adjustment

9820/9830/9835Service Manual Confidential Tests and Adjustments

5.Following a totals number, the routine prompts another response. Any entry other than Y results in an abort.

6.Press D to return to the Sensor Display screen or press L to exit the Sensor Display test sequence.

Print Contrast Adjustment

Adjust print contrast if printing is too light or too dark.

TOOLS REQUIRED:

∙Small Flat-head Screwdriver

Using a small flat-head screwdriver, turn print contrast knob(clockwise for darker print--counterclockwisefor lighter print).

Figure 5- 1. Print Contrast Adjustment

NOTE: Adjustments may also be made via immediate commands. Refer to the Packet Reference Manual for information on proper syntax.

Platen Motor Gear Adjustment

This procedure adjusts the backlash in the platen drive gear train. It should be performed each time a Platen Assembly or a Platen Motor Assembly is replaced.

TOOLS/MATERIALS REQUIRED:

∙6-inch Phillips Screwdriver

∙Paper Shimstock (0.006” to 0.008” thick) or Label Backing Paper Liner (folded 3 layers thick)

1.Turn printer off and unplug power cord.

2.Raise cover and ensure printhead is latched in the down position.

3.Remove printer housing.

Figure 5- 2. Platen Motor Gear Adjustment

4.Using the paper shimstock, check clearance between the bearer on the platen motor gear and the bearer on the platen gear. (See Figure 5-2) Clearance should be between 0.006” and 0.008”.

5.If clearance is less than or greater than the specification, perform steps 7 thru 11.

6.With printhead fully latched, loosen four Phillips head screws holding platen motor.

7.With paper shimstock in place, move platen motor housing to adjust for specification clearance.

8.Tighten all four screws.

9.Rotate platen by hand 360° to check for binding or excessive backlash.

10.Repeat steps 7 thru 10 as necessary.

Ribbon Tension Adjustment

There are two Ribbon Tension Adjustments: The Ribbon Supply Roller Eccentric, and the Ribbon Take- up Roller Eccentric.

Rotation of the supply roller eccentric provides even tension across the width of the ribbon on the supply side of the printhead (Typically, the factory setting for the supply eccentric is primarily horizontal). Rotation of the take-up roller eccentric (adjusted after the supply eccentric) provides even tension across the width of the ribbon on the take-up side of the printhead.

Either adjustment moves the outside end of the ribbon roller to change the pressure on the ribbon. The overall result of properly adjusted eccentrics is consistent ribbon tracking.

MATERIALS REQUIRED:

∙4” thermal transfer supply (ex: MMTP4055 900091)

∙4” ribbon

24 TC9830SM Rev. B 7/98 Confidential July 1998