Technical data

7.3 Black Prints
7.3 Black Prints
Description: The print is completely black.
Troubleshooting: Print one copy of the 1948 Setup pattern,
as shown in Section 3.3 and the grid test pattern, as shown in
Section 3.3. Inspect both test prints for the following:
• If both prints are completely black, go to Section 7.15, HVPSA
FIP.
• If any image is visible, go to Section 7.2, Background Staining.
• If either one of the two prints is completely black, do the
following procedure:
1. Disconnect the 26-pin plug that connects to P37 on the DC
control board.
2. Print the grid test pattern.
• If the pattern is all black, replace the DC control board.
• If the print is not all black, do the following:
– Swap the video control board.
– Replace the 26-pin cable harness that connects P37 on
the DC control board to J2 on the video control board.
7.4 Blank Prints
Description: The entire sheet is blank.
Troubleshooting: Print and inspect one copy of each 1948 Setup
pattern, as shown in Section 3.3 and the the grid test pattern, as
shown in Section 3.3. Perform the following procedure:
1. If the printed image is too light, go to Section 7.8, Light Images.
2. If only the 1948 Setup pattern is blank, do the following:
• Swap the video control board.
• Replace the 26-pin cable harness that connects P37 on the
DC control board to J2 on the video control board.
Image Defects FIPs 7–5