Oki OKIFAX OF-38 Field Service Manual - M M M M M M M M M

5.2.3.2

Rudimentary 

adjustment of focus

Procedures:

Manually feed the specified pattern of the test chart, 

 test chart (see

Figure 

 until it is set at the reading position.

Loosen the lens lock screw.

Move the lens back and forth, in the direction of the symbol “F”, to maximize the

output level difference.

Lens

Lens Lock

Screw

Fig. 5.2.8 Focus adjustment

Fig. 5.2.9

Rudimentary 

focus

adjustment waveform

q 

m m m m m m m m m

Fig. 5.2.10

Part of the 

 test chart

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