Specifications

2. Press the ON LINE (3) key and observe that the printer enters

the ADJUSTMENT mode (printer display changes to [ A d j]). In

ADJUSTMENT mode, any existing special print modes are canceled.

3. Press the PRG (1) key and observe that the printer display changes

to [.5 i 9], and print the Sample Test Patterns shown in Figures 7–3

to 7–6.

Each of the test patterns can be accessed and run individually to enable

the adjustment procedures to be performed quickly (see Section 7.6).

All of the adjustment procedures described in this chapter must be

performed in the order given, because of the interactive affect produced

when an adjustment is made:

• Shuttle movement amplitude adjustment procedure (see Section 7.3)

• Null voltmeter amplitude adjustment (see Section 7.4)

• Test pattern adjustment procedures (see Section 7.5)

• Amplitude pattern adjustment procedure (see Section 7.5.1)

• Vertical pattern adjustment procedure (see Section 7.5.2)

• Horizontaltiming pattern adjustment procedure (see Section 7.5.3)

• Intermodulegap pattern adjustment procedure (see Section 7.5.4)

• Print actuator module adjustment procedure (see Section 7.6)

The tools required are:

1. 10x magnifying glass

2. Voltmeter with a 0.5 volt full scale

3. Small slotted-head screwdriver

Refer to Figure 7–1 to locate the logic boards, test points, and adjust-

ments speciﬁed by the adjustment procedures that follow.

7–2 PRINT QUALITY ADJUSTMENT PROCEDURES