Adjustments

General Location of Test, Adjustment and Monitor Points

Figure 5, PI331MC-DR PCB MONITOR AND TEST POINTS, shows the pictorial layout of

the controls and the tests points. These adjustment potentiometers and the test points are

shown relative to the connector and to the output pads for LED light power. This is a bird’s

eye view of the PCB’s backside with the glass window of the module facing down on the

documents.

Test point labeled TV is for the analog image pixels, just as it is produced at the output of

the CIS array section, and prior to its entry into the tracking digitizer circuit.

Test point labeled TR is the output of the tracking reference level from the tracking

digitizer circuit.

Test point labeled TVD is the digital output from the comparator.

Offset adjust, R4, is a screw driver adjustment potentiometer that is accessed through

adjustment hole as it viewed in figure 5.

Gain adjust, R5, is a screw driver adjustment potentiometer that is accessed through the

hole as it is viewed in figure 5.

PAGE 8 OF 9 - PI331MC-DR, 11-8-00

BACK SIDE OF THE PCB AS VIEWED ON MODULE

WITH THE GLASS WINDOW FACING DOWN.

TV

TR

TVD

R5 (GAIN ADJ)

R4 (OFFSET ADJ)

CONNECTOR

VLED

GLED

PI331MC-DR PCB MONITOR AND TEST POINTS

FIGURE 5.