Set Pots Adjustment Procedure A. B. - Express Imaging Systems

Set Pots Adjustment Procedure
Follow this procedure to set pots on the EEScan16B Upgrade for the Express Scan Film Scanner.
The set pots procedure is required when
• the prescanner sensor and light source area are cleaned
• the Embedded PC Assembly (PN 77184746) is replaced
• the PCB Assembly, Matrix Pre-Scan Digitizer (PN 18689827) is replaced.
If the EEScan16B is set up for APS, ensure that the APS Perforation Sensor (PN 20646319 Mount
Assy, Prescan, Film Guide, APS) is installed.
A. B.
Figure 1. When facing the back of the scanner, the PCB Assembly, Matrix Pre-Scan Digitizer A. and the
Embebbed PC Assembly B. are mounted to the interior left side wall. A row of eight pots run top to bottom
along the edge of the Embedded PC.
1. Turn the scanner power off.
2. Remove the back cover of the scanner.
3. Install a VGA Monitor and Keyboard onto the Embedded PC Assembly. A PS/2 Keyboard cable
or adapter will be required. See Figure 2. Tip: Remove the back of the Pre-scanner for easy
access to the top of the Embedded PC Assembly.
1
Express Imaging Systems, LLC. Set Pots Adjustment 12/2010

C. D.
C. D.
Figure 2. VGA Monitor D. and PS/2 Keyboard C. ports are located at the top of the Embedded PC Assembly.
4. Turn the scanner power on and wait for the PC to boot up. Once the PC has booted, the screen in
Figure 3. will appear.
Figure 3. Boot screen for EEScan16B PC.
5. Press the S key on the keyboard. The Set Pots screen, Figure 4. will appear.
Express Imaging Systems, LLC. Set Pots Adjustment 12/2010
2

Figure 4. The Set Pots screen.
6. On the monitor, the fi rst column on the left of the screen, R4, reads from the fi rst (topmost) pot on
the PCB Assembly, Matrix Pre-Scan Digitizer. Reading left to right each column corresponds to a
pot, top to bottom.
7. Starting with R4, fi nd the reading for Blue. Adjust the pot to bring the highest setting in the column
to read 63200. Turn the pot clockwise to lower the reading, counter-clockwise to raise it. Do this
for all the pots, except R15 and R16.
Note: If the scanner is set up for APS and the APS Perforation Sensor is installed, then adjust
R15 and R16 to 2500. If the scanner is not set up for APS, then adjust R15 and R16 as
low as they will go.
8. Press the Esc key on the keyboard to stop the Express Scan program.
9. Turn the scanner power off.
10. Disconnect the Monitor and Keyboard from the Embedded PC.
11. Replace the back cover of the scanner.
12. Turn the scanner power on. This will reboot the Embedded PC. The scanner is now ready for
normal operation.
3
Express Imaging Systems, LLC. Set Pots Adjustment 12/2010